Registration No. 333-39890
================================================================================
                       SECURITIES AND EXCHANGE COMMISSION
                             WASHINGTON, D.C. 20549

                  --------------------------------------------


                                 AMENDMENT NO. 1
                                       TO
                                    FORM S-3
                             REGISTRATION STATEMENT
                                      Under
                           The Securities Act of 1933


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                           MGIC INVESTMENT CORPORATION
             (Exact name of registrant as specified in its charter)

                  --------------------------------------------

               Wisconsin                                39-1486475
    (State or other jurisdiction of                  (I.R.S. Employer
     incorporation or organization)               Identification Number)

                                   MGIC Plaza
                            250 East Kilbourn Avenue
                           Milwaukee, Wisconsin 53202
                                 (414) 347-6480
               (Address, including zip code, and telephone number,
                 including area code, of registrant's principal
                               executive offices)

                  --------------------------------------------

                                 Jeffrey H. Lane
              Senior Vice President, Secretary and General Counsel
                           MGIC Investment Corporation
                                   MGIC Plaza
                            250 East Kilbourn Avenue
                           Milwaukee, Wisconsin 53202
                                 (414) 347-6480
                       (Name, address and telephone number
                              of agent for service)
                                   Copies to:

        Benjamin F. Garmer, III                      Edward S. Best
            Foley & Lardner                       Mayer, Brown & Platt
       777 East Wisconsin Avenue                190 South LaSalle Street
    Milwaukee, Wisconsin 53202-5367             Chicago, Illinois 60603
             (414) 271-2400                          (312) 782-0600

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     Approximate date of commencement of proposed sale to the public: From time
to time after this Registration Statement becomes effective.
     If the only securities being registered on this Form are being offered
pursuant to dividend or interest reinvestment plans, please check the following
box. [ ]
     If any of the securities being registered on this Form are to be offered on
a delayed or continuous basis pursuant to Rule 415 under the Securities Act of
1933, other than securities offered only in connection with dividend or interest
reinvestment plans, check the following box. [X]
     If this Form is filed to register additional securities for an offering
pursuant to Rule 462(b) under the Securities Act, check the following box and
list the Securities Act registration statement number of the earlier effective
registration statement for the same offering. [ ]
     If this Form is a post-effective amendment filed pursuant to Rule 462(c)
under the Securities Act, check the following box and list the Securities Act
registration statement number of the earlier effective registration statement
for the same offering. [ ]
     If delivery of the prospectus is expected to be made pursuant to Rule 434,
please check the following box. [ ]

                  --------------------------------------------


     The Registrant hereby amends this Registration Statement on such date or
dates as may be necessary to delay its effective date until the Registrant shall
file a further amendment which specifically states that this Registration
Statement shall thereafter become effective in accordance with Section 8(a) of
the Securities Act of 1933 or until this Registration Statement shall become
effective on such date as the Commission, acting pursuant to said Section 8(a),
may determine.
================================================================================




                 SUBJECT TO COMPLETION, DATED SEPTEMBER 11, 2000


PROSPECTUS



                                  $500,000,000

                           MGIC Investment Corporation

                             Senior Debt Securities

                               ------------------


     We may offer our senior debt securities from time to time. We will provide
the specific terms of these securities in supplements to this prospectus. The
supplements will also describe the manner in which the senior debt securities
will be offered. You should read this prospectus and any supplement carefully
before you invest.


     The senior debt securities are a new issue of securities. Unless we
otherwise specify in a prospectus supplement, the senior debt securities will be
not be listed on any securities exchange and there will be no established
trading market for them.

     THE RISKS DISCUSSED IN THE "RISK FACTORS" SECTION OF THIS PROSPECTUS AT
PAGE 3 MAY MATERIALLY AFFECT OUR REVENUES, LOSSES AND EXPENSES. WE MAY UPDATE
THESE RISKS UNDER THE "RISK FACTORS" SECTION IN OUR LATEST QUARTERLY REPORT ON
FORM 10-Q OR ANNUAL REPORT ON FORM 10-K. We incorporate these reports by
reference in this prospectus and they are available for your review as described
in the "Where You Can Find More Information" section of this prospectus.


                               ------------------

     Neither the Securities and Exchange Commission nor any state securities
commission has approved or disapproved these securities or determined if this
prospectus is truthful or complete. Any representation to the contrary is a
criminal offense.









                               ------------------

                The date of this prospectus is               , 2000.





The information in this prospectus is not complete and may be changed. We may
not sell these securities until the registration statement filed with the
Securities and Exchange Commission is effective. This prospectus is not an offer
to sell these securities and it is not soliciting an offer to buy these
securities in any state where the offer or sale is not permitted.





                           MGIC INVESTMENT CORPORATION

     MGIC Investment Corporation is a holding company which, through our wholly
owned subsidiary, Mortgage Guaranty Insurance Corporation is the leading
provider of private mortgage insurance coverage in the United States to the home
mortgage lending industry. Private mortgage insurance covers residential first
mortgage loans and expands home ownership opportunities by enabling people to
purchase homes with less than 20% down payments. If the homeowner defaults,
private mortgage insurance reduces and, in some instances, eliminates the loss
to the insured institution.

     Private mortgage insurance also facilitates the sale of low down payment
mortgage loans in the secondary mortgage market, principally to the Federal
National Mortgage Association and the Federal Home Loan Mortgage Corporation. In
addition to mortgage insurance on first liens, through other subsidiaries, we
insure residential second mortgages and provide lenders with various
underwriting and other services and products related to home mortgage lending.


         The private mortgage insurance industry currently consists of eight
active mortgage insurers and their affiliates. In addition to Mortgage Guaranty
Insurance Corporation, the seven other active private mortgage insurers (not
including affiliates of these companies) are PMI Mortgage Insurance Co.; GE
Capital Mortgage Insurance Corporation; United Guaranty Residential Insurance
Company; Radian Guaranty Inc.; Republic Mortgage Insurance Company; Triad
Guaranty Insurance Corporation; and CMG Mortgage Insurance Company. The Annual
Report on Form 10-K for the year ended December 31, 1999 of the parent company
of PMI Mortgage Insurance Co. says that PMI Mortgage Insurance Co. owns 50% of
the common stock of CMG Mortgage Insurance Company. For 1995 and subsequent
years, Mortgage Guaranty Insurance Corporation has been the largest private
mortgage insurer based on new primary insurance written (with a market share of
24.3% in 1999, 23.1% in 1998 and 26.6% in 1997) and at December 31, 1999, MGIC
also had the largest book of direct primary insurance in force.


     Mortgage Guaranty Insurance Corporation is licensed in all 50 states of the
United States, the District of Columbia and Puerto Rico. We are a Wisconsin
corporation. Our principal office is located at MGIC Plaza, 250 East Kilbourn
Avenue, Milwaukee, Wisconsin 53202 and our telephone number is 414-347-6480.

                                 USE OF PROCEEDS

     Unless we otherwise specify in a prospectus supplement, the net proceeds we
receive from the sale of the debt securities offered under this prospectus and
the accompanying prospectus supplement will be used for general corporate
purposes. These purposes may include repayment of a portion of notes payable
under our credit facilities. The net proceeds may be invested temporarily or
applied to repay short-term debt until they are used for their stated purpose.

                       RATIOS OF EARNINGS TO FIXED CHARGES

     The following table sets forth our ratios of earnings to fixed charges for
the periods presented:


     Six Months Ended
      June 30, 2000                       Year Ended December 31,
     ----------------        ------------------------------------------------
                                 1999     1998     1997     1996     1995
                                 ----     ----     ----     ----     ----
           25.3                  29.2     25.6     47.5     54.2     44.3


     For purposes of computing the ratios of earnings to fixed charges, earnings
represent net income less income or loss from equity investees, plus applicable
income taxes and fixed charges. Fixed charges include all interest expense,
amortization of debt expense and the proportion deemed representative of the
interest factor of rent expense.




                                       2




                                  RISK FACTORS

     Our revenues and losses could be affected by the risk factors discussed
below.

     IF THE VOLUME OF LOW DOWN PAYMENT HOME MORTGAGE ORIGINATIONS DECLINES, THE
AMOUNT OF INSURANCE THAT WE WRITE COULD ALSO DECLINE AND RESULT IN DECLINES IN
OUR FUTURE REVENUES. The factors that affect the volume of low down payment
mortgage originations include:

     o    the level of home mortgage interest rates,

     o    the health of the domestic economy as well as conditions in regional
          and local economies,

     o    housing affordability,

     o    population trends, including the rate of household formation,

     o    the rate of home price appreciation, which in times of heavy
          refinancing affects whether refinance loans have loan-to-value ratios
          that require private mortgage insurance, and

     o    government housing policy encouraging loans to first-time homebuyers.

     IF LENDERS AND INVESTORS SELECT ALTERNATIVES TO PRIVATE MORTGAGE INSURANCE,
THE AMOUNT OF INSURANCE THAT WE WRITE COULD DECLINE AND RESULT IN DECLINES IN
OUR FUTURE REVENUES. These alternatives include:

     o    lenders using government mortgage insurance programs, including those
          of the Federal Housing Administration and the Veterans Administration,

     o    investors holding mortgages in portfolio and self-insuring,

     o    investors using credit enhancements other than private mortgage
          insurance or using other credit enhancements in conjunction with
          reduced levels of private mortgage insurance coverage, and

     o    lenders structuring mortgage originations to avoid private mortgage
          insurance, such as a first mortgage with an 80% loan-to-value ratio
          and a second mortgage with a 10% loan-to-value ratio (referred to as
          an 80-10-10 loan) rather than a first mortgage with a 90% loan-
          to-value ratio.

     BECAUSE MOST OF THE LOANS MGIC INSURES ARE SOLD TO FANNIE MAE AND FREDDIE
MAC, CHANGES IN THEIR BUSINESS PRACTICES COULD REDUCE OUR REVENUES OR INCREASE
OUR LOSSES. The business practices of Fannie Mae and Freddie Mac affect the
entire relationship between them and mortgage insurers and include:

     o    the level of private mortgage insurance coverage, subject to the
          limitations of Fannie Mae and Freddie Mac's charters when private
          mortgage insurance is used as the required credit enhancement on low
          down payment mortgages,

     o    whether Fannie Mae or Freddie Mac influence the mortgage lender's
          selection of the mortgage insurer providing coverage and, if so, any
          transactions that are related to that selection,

     o    whether Fannie Mae or Freddie Mac will give mortgage lenders an
          incentive to select a mortgage insurer that has a "AAA" claims-paying
          ability rating to benefit from the lower capital required of Fannie
          Mae or Freddie Mac under the Office of Federal Housing Enterprise
          Oversight's proposed stress test when a mortgage is insured by a "AAA"
          company,



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     o    the underwriting standards that determine what loans are eligible for
          purchase by Fannie Mae or Freddie Mac, which thereby affect the
          quality of the risk insured by the mortgage insurer, as well as the
          availability of mortgage loans,

     o    the terms on which mortgage insurance coverage can be canceled before
          reaching the cancellation thresholds established by law, and

     o    the circumstances in which mortgage servicers must perform activities
          intended to avoid or mitigate loss on insured mortgages that are
          delinquent.

     BECAUSE WE PARTICIPATE IN AN INDUSTRY THAT IS INTENSELY COMPETITIVE, OUR
REVENUES COULD DECLINE AS WE RESPOND TO COMPETITION. Competition for private
mortgage insurance premiums occurs not only among private mortgage insurers but
increasingly with mortgage lenders through captive mortgage reinsurance
transactions in which a lender's affiliate reinsures a portion of the insurance
written by a private mortgage insurer on mortgages originated by the lender. The
low level of losses that has recently prevailed in the private mortgage
insurance industry has encouraged competition to assume default risk through
captive reinsurance arrangements, self insurance, 80-10-10 loans and other
means. The level of competition within the private mortgage insurance industry
has also increased as many large mortgage lenders have reduced the number of
private mortgage insurers with whom they do business at the same time as
consolidation among mortgage lenders has increased the share of the mortgage
lending market held by large lenders. Our private mortgage insurance competitors
include PMI Mortgage Insurance Co., GE Capital Mortgage Insurance Corporation,
United Guaranty Residential Insurance Company, Radian Guaranty Inc., Republic
Mortgage Insurance Company and Triad Guaranty Insurance Corporation.

     IF INTEREST RATES DECLINE, HOUSE PRICES APPRECIATE OR MORTGAGE INSURANCE
CANCELLATION REQUIREMENTS CHANGE, OUR PERSISTENCY COULD DECLINE AND RESULT IN
DECLINES IN OUR REVENUE. In each year, most of MGIC's premiums are from
insurance that has been written in prior years. As a result, the length of time
insurance remains in force is an important determinant of revenues. The factors
affecting persistency of the insurance in force include:

     o    the level of current mortgage interest rates compared to the mortgage
          coupon rates on the insurance in force, which affects the
          vulnerability of the insurance in force to refinancings, and

     o    mortgage insurance cancellation policies of mortgage investors along
          with the rate of home price appreciation experienced by the homes
          underlying the mortgages in the insurance in force.

     IF THE DOMESTIC ECONOMY DETERIORATES, MORE HOMEOWNERS MAY DEFAULT AND OUR
LOSSES MAY INCREASE. Losses result from events that reduce a borrower's ability
to continue to make mortgage payments, such as unemployment, and whether the
home of a borrower who defaults on his mortgage can be sold for an amount that
will cover unpaid principal and interest and the expenses of the sale. Favorable
economic conditions generally reduce the likelihood that borrowers will lack
sufficient income to pay their mortgages and also favorably affect the value of
homes, thereby reducing and in some cases even eliminating a loss from a
mortgage default. A significant deterioration in economic conditions would
probably increase MGIC's losses.

     WE ARE SUBJECT TO LITIGATION THAT COULD RESULT IN A LARGE DAMAGE AWARD
AGAINST US. Our MGIC subsidiary is a defendant in a lawsuit alleging that MGIC
violated the Real Estate Settlement Procedures Act by entering into transactions
with lenders that were not properly priced, in return for the referral of
mortgage insurance. The complaint seeks damages of three times the amount of the
mortgage insurance premiums that have been paid and that will be paid at the
time of judgment for the mortgage insurance found to be involved in a violation
of the Real Estate Settlement Procedures Act. The complaint also seeks
injunctive relief, including prohibiting MGIC from receiving future premium
payments. MGIC has answered the complaint and



                                       4



denied liability. However, we cannot predict the ultimate outcome of litigation.
It is possible there could be a large damage award against us.

     BECAUSE WE EXPECT THE PACE OF CHANGE IN OUR INDUSTRY AND IN HOME MORTGAGE
LENDING TO REMAIN HIGH, WE WILL BE DISADVANTAGED UNLESS WE ARE ABLE TO RESPOND
TO NEW WAYS OF DOING BUSINESS. We expect the processes involved in home mortgage
lending will continue to evolve through greater use of technology. This
evolution could effect fundamental changes in the way home mortgages are
distributed. Affiliates of lenders who are regulated depositary institutions
gained expanded insurance powers under financial modernization legislation and
the capital markets may emerge as providers of insurance in competition with
traditional insurance companies. These trends and others increase the level of
uncertainty attendant to the private mortgage insurance business, demand rapid
response to change and place a premium on innovation.





                                       5



                         DESCRIPTION OF DEBT SECURITIES

     The following description of the terms of the senior debt securities
describes general terms that apply to the senior debt securities. The particular
terms of any debt securities will be described more specifically in each
prospectus supplement (and pricing supplement, where applicable) relating to
those debt securities. We will also indicate in the prospectus supplement
whether the terms and provisions described in this prospectus apply to a
particular series of debt securities.

     The debt securities will be issued under an indenture dated as of        ,
2000, between us and Bank One Trust Company, National Association, as trustee.

     We summarize the indenture below. Since this is only a summary, it does not
contain all of the information, which may be important to you. A copy of the
entire form of indenture is an exhibit to the registration statement of which
this prospectus is a part. When we make parenthetical section references in this
prospectus, those are references to sections of the indenture. We incorporate
the entire indenture by reference, and encourage you to read the indenture.

GENERAL

     The indenture does not limit the aggregate principal amount of debt
securities which we may issue and provides that we may issue debt securities
under the indenture from time to time in one or more series. (Section 3.1). The
indenture does not limit the amount of other indebtedness or debt securities,
other than some secured indebtedness as described below, which we or our
subsidiaries may issue. Under the indenture, the terms of the debt securities of
any series may differ and we, without the consent of the holders of the debt
securities of any series, may reopen a previous series of debt securities and
issue additional debt securities of the series or establish additional terms of
the series. (Section 3.1).

     Unless otherwise provided in a prospectus supplement, the debt securities
will be our unsecured obligations and will rank equally with all of our other
unsecured and unsubordinated indebtedness.

     We are a holding company and our principal source of cash is dividends from
our Mortgage Guaranty Insurance Corporation subsidiary. Under applicable state
insurance law, the amount of cash dividends and other distributions that can be
paid from Mortgage Guaranty Insurance Corporation is restricted. These
restrictions are described in general terms in the note to our consolidated
financial statements that discusses dividend restrictions. This note also
discusses the differences between generally accepted accounting principles and
statutory insurance accounting principles. One of the insurance law dividend
restriction tests is based on statutory policyholders' surplus, which is
computed under statutory accounting principles by counting items as liabilities
that are not counted as liabilities under generally accepted accounting
principles. In our consolidated financial statements for the year ended December
31, 1999, the discussion of these restrictions and differences is in note 11.
Our Annual Report on Form 10-K contains our consolidated financial statements
and the related notes and is one of the documents incorporated by reference into
this prospectus. See "Where You Can Find More Information." Also, because we are
a holding company, our rights and the rights of our creditors, including the
holders of debt securities, and shareholders to participate in any distribution
of assets of any subsidiary upon the subsidiary's liquidation or reorganization
or otherwise is subject to the prior claims of the subsidiary's creditors,
except to the extent that we may be a creditor with recognized claims against
the subsidiary.

     Terms. Each prospectus supplement will describe the following terms of the
debt securities offered by it:

     o    the title of the debt securities and the series in which such debt
          securities are included;




                                       6




     o    any limit on the aggregate principal amount of the debt securities or
          the series of which they are a part;

     o    the currency or currencies, or composite currencies, in which the debt
          securities will be denominated and in which we will make payments on
          the debt securities;

     o    the date or dates on which we must pay principal;

     o    the rate or rates at which the debt securities will bear interest or
          the manner in which interest will be determined, if any interest is
          payable;

     o    the date or dates from which any interest will accrue, the date or
          dates on which we must pay interest and the record date for
          determining who is entitled to any interest payment;

     o    the place or places where we must pay the debt securities and where
          any debt securities issued in registered form may be sent for transfer
          or exchange;

     o    the terms and conditions on which we may, or may be required to,
          redeem the debt securities;

     o    the terms and conditions of any sinking fund;

     o    if other than denominations of $1,000 and integral multiples thereof,
          the denominations in which we may issue the debt securities;

     o    the amount we will pay if the maturity of the debt securities is
          accelerated;

     o    whether we will issue the debt securities in the form of one or more
          global securities and, if so, the identity of the depositary for the
          global security or securities;

     o    any addition to or changes in the events of default or covenants that
          apply to the debt securities;

     o    whether the debt securities will be defeasible; and

     o    any other terms of the debt securities and any other deletions from or
          modifications or additions to the indenture in respect of the debt
          securities. (Section 3.1).

     Payments. Unless otherwise stated in the prospectus supplement, we will pay
principal, premium, interest and additional amounts, if any, on the debt
securities at the office or agency we maintain for that purpose, initially the
corporate trust office of the trustee. We may pay interest on debt securities
issued in registered form by check mailed to the address of the persons entitled
to the payments or we may pay by transfer to their U. S. bank accounts. Interest
on debt securities issued in registered form will be payable on any interest
payment date to the registered owners of the debt securities at the close of
business on the regular record date for the interest payment date. We will name
in the prospectus supplement all paying agents we initially designate for the
debt securities. We may designate additional paying agents, rescind the
designation of any paying agent or approve a change in the office through which
any paying agent acts, but we must maintain a paying agent in each place where
payments on the debt securities are payable. (Sections 3.7 and 10.2).

     Registration, Transfer and Exchange. Unless otherwise stated in the
prospectus supplement, the debt securities, duly endorsed or accompanied by a
written instrument of transfer, if we or the security registrar require, may be
presented for transfer or exchanged for other debt securities of the same series
containing identical terms and provisions, in any authorized denominations, and
in the same aggregate principal amount at the office or agency we maintain for
that purpose, initially the corporate trust office of the trustee. There



                                       7



will be no service charge for any transfer or exchange, but we may require
payment sufficient to cover any tax or other governmental charge or other
expenses payable in connection with the transfer or exchange. We will not be
required to issue, register the transfer of, or exchange, debt securities during
a period beginning at the opening of business 15 days before the day of mailing
of a notice of redemption of any such debt securities and ending at the close of
business on the day of such mailing or register the transfer of or exchange any
debt security selected for redemption in whole or in part, except the unredeemed
portion of any debt security being redeemed in part. We have appointed the
trustee as the initial security registrar. (Section 3.5). If we elect to replace
the security registrar of any series of debt securities, then the new security
registrar will be named in the prospectus supplement. (Section 3.1). We may
designate additional transfer agents, rescind the designation of any transfer
agent or approve a change in the office through which any transfer agent acts,
but we must maintain a transfer agent in each place where any payments on the
debt securities are payable. (Section 10.2).

     Denominations; Global Securities. Unless otherwise stated in the prospectus
supplement, we will issue the debt securities only in fully registered form,
without coupons, in minimum denominations of $1,000 and integral multiples of
$1,000. (Section 3.2). The debt securities may be represented in whole or in
part by one or more global debt securities. Each global security will be
registered in the name of a depositary or its nominee and the global security
will bear a legend regarding the restrictions on exchanges and registration of
transfer. Interests in a global security will be shown on records maintained by
the depositary and its participants, and transfers of those interests will be
made as described below.

     U.S. Federal Income Tax Considerations. We may issue the debt securities as
original issue discount securities, bearing no interest or bearing interest at a
rate, which, at the time of issuance, is below market rates, to be sold at a
substantial discount below their principal amount. We will describe some special
U. S. federal income tax and other considerations applicable to any debt
securities that are issued as original issue discount securities in the
applicable prospectus supplement.

     If the purchase price of any debt securities is payable in one or more
foreign currencies or composite currencies, if any debt securities are
denominated in one or more foreign currencies or composite currencies or if any
payments on the debt securities are payable in one or more foreign currencies or
composite currencies, we will describe the restrictions, elections, certain U.
S. federal income tax considerations, specific terms and other information about
the debt securities and the foreign currency or composite currencies in the
prospectus supplement.

     Purchases at the Option of Holders. We will comply with Section 14(e) under
the Securities Exchange Act of 1934 and any other tender offer rules under the
Securities Exchange Act of 1934 that may then be applicable in connection with
any obligation to purchase debt securities at the option of the holders. Any
obligation to purchase debt securities at the option of the holders applicable
to a series of debt securities will be described in the related prospectus
supplement.

     Limited Restrictions on Additional Indebtedness. Unless otherwise described
in a prospectus supplement relating to any debt securities, other than as
described below under "- Limitation on Liens on Stock of Subsidiaries," the
indenture does not limit our ability to incur debt or give holders of debt
securities protection in the event of a sudden and significant decline in our
credit quality or a takeover, recapitalization or highly leveraged or similar
transaction involving us. Accordingly, we could in the future enter into
transactions that could increase the amount of indebtedness outstanding at that
time or otherwise affect our capital structure or credit rating. You should
refer to the prospectus supplement relating to a particular series of debt
securities for information regarding any changes in the events of default
described below or covenants contained in the indenture, including any addition
of a covenant or other provisions providing event risk or similar protection.



                                       8




GLOBAL SECURITIES

     The debt securities of a series may be issued in whole or in part in the
form of one or more global debt securities that will be deposited with a
depositary or its nominee identified in the applicable prospectus supplement.

     The specific terms of the depositary arrangement covering debt securities
will be described in the prospectus supplement relating to that series. We
anticipate that the following provisions will apply to all depositary
arrangements.

     Upon the issuance of a global security, the depositary for the global
security or its nominee will credit to accounts in its book-entry registration
and transfer system the principal amounts of the debt securities represented by
the global security. These accounts will be designated by the underwriters or
agents with respect to the debt securities or by us if the debt securities are
offered and sold directly by us. Only institutions that have accounts with the
depositary or its nominee, and persons, who hold beneficial interests through
those participants, may own beneficial interests in a global security. Ownership
of beneficial interests in a global security will be shown only on, and the
transfer of those ownership interests will be effected only through, records
maintained by the depositary, its nominee or any participants of the depositary
or its nominee, as the case may be. The laws of some states require that certain
purchasers of securities take physical delivery of securities in definitive
form. These laws may prevent you from transferring your beneficial interest in a
global security.

     As long as the depositary or its nominee is the registered owner of a
global security, the depositary or nominee will be considered the sole owner or
holder of the debt securities represented by the global security. Except as
described below, owners of beneficial interests in a global security will not be
entitled to have debt securities registered in their names and will not be
entitled to receive physical delivery of the debt securities in definitive form.

     We will make all payments of principal of, any premium and interest on, and
any additional amounts with respect to, debt securities issued as global
securities to the depositary or its nominee. Neither we nor the trustee, any
paying agent or the security registrar assume any responsibility or liability
for any aspect of the depositary's or any participant's records relating to, or
for payments made on account of, beneficial interests in a global security.

     We expect that the depositary for a series of debt securities or its
nominee, upon receipt of any payment with respect to the debt securities, will
immediately credit participants' accounts with payments in amounts proportionate
to their respective beneficial interest in the principal amount of the global
security for the debt securities as shown on the records of the depositary or
its nominee. We also expect that payments by participants to owners of
beneficial interests in the global security held through participants will be
governed by standing instructions and customary practices, as is now the case
with securities held for the accounts of customers registered in "street name,"
and will be the responsibility of the participants.

     The indenture provides that if

     o    the depositary notifies us that it is unwilling or unable to continue
          as depositary for a series of debt securities, or if the depositary is
          no longer legally qualified to serve in that capacity, and we have not
          appointed a successor depositary within 90 days of written notice,

     o    we determine that a series of debt securities will no longer be
          represented by global securities and we execute and deliver an order
          to that effect to the trustee, or

     o    an event of default with respect to a series of debt securities occurs
          and continues,



                                       9



the global securities for that series may be exchanged for registered debt
securities in definitive form. (Section 3.5). The definitive debt securities
will be registered in the name or names with which the depositary instructs the
trustee. We expect that these instructions may be based upon directions the
depositary receives from participants with respect to ownership of beneficial
interests in global securities.

CERTAIN RESTRICTIONS

     For purposes of the lien limitation and sales of capital stock restrictions
described below and this definition, a "subsidiary" is an entity of which more
than 50% of the interests entitled to vote in the election of directors or
managers is owned by any combination of us and our subsidiaries.

     Limitations on Liens on Stock of Designated Subsidiaries. Neither we nor
any of our subsidiaries will be permitted to create, assume, incur or permit to
exist any indebtedness secured by any lien on the capital stock of any
designated subsidiary unless the debt securities (and, if we so elect, any other
indebtedness of ours that is not subordinate to the debt securities and with
respect to which the governing instruments require, or pursuant to which we are
otherwise obligated, to provide such security) are secured equally and ratably
with such indebtedness for at least the time period such other indebtedness is
so secured. (Section 10.5).


     "Designated subsidiary" means any present or future consolidated subsidiary
of ours, the consolidated shareholder's equity of which constitutes at least 15%
of our consolidated shareholders' equity. As of June 30, 2000, our designated
subsidiaries were Mortgage Guaranty Insurance Corporation and MGIC Reinsurance
Corporation of Wisconsin.


     "Indebtedness" means, with respect to any person, for purposes of this
covenant:

     o    the principal of and any premium and interest on, indebtedness of such
          person for money borrowed and indebtedness evidenced by notes,
          debentures, bonds or other similar instruments for the payment of
          which that person is responsible or liable;

     o    all capitalized lease obligations of that person;

     o    all obligations of that person issued or assumed as the deferred
          purchase price of property, all conditional sale obligations and all
          obligations under any title retention agreement;

     o    all obligations of that person for the reimbursement of any obligor on
          any letter of credit, banker's acceptance or similar credit
          transaction (other than obligations with respect to some letters of
          credit securing obligations entered into in the ordinary course of
          business);

     o    all obligations of the type referred to above of other persons and all
          dividends of other persons of which, that person is responsible or
          liable as obligor, guarantor or otherwise;

     o    all obligations of the type referred to above of other persons secured
          by any lien on any property or asset of that person, the amount of
          this obligation being deemed to be the lesser of the value of such
          property or assets or the amount of the obligation so secured; and

     o    any amendments, modifications, refundings, renewals or extensions of
          any indebtedness or obligation described above. (Section 1.1).

     Limitations on Sales of Capital Stock of Designated Subsidiaries. Neither
we nor any of our designated subsidiaries will be permitted to issue, sell,
transfer or dispose of capital stock of a designated subsidiary, except to us or
one of our subsidiaries that agrees to hold the transferred shares subject to
the terms of this sentence, unless we dispose of the entire capital stock of the
designated subsidiary at the same time for



                                       10



cash or property which, in the opinion of our board of directors, is at least
equal to the fair value of the capital stock. (Section 10.6).

CONSOLIDATION, MERGER AND SALE OF ASSETS

     We may not consolidate with or merge into any other person or convey or
transfer or lease our properties and assets substantially as an entirety to any
person, and we may not permit any other person to consolidate with or merge into
us, unless:

     o    if we consolidate with or merge into another corporation or convey or
          transfer our properties and assets substantially as an entirety to any
          person, the successor is organized under the laws of the United States
          or any state and assumes our obligations under the debt securities;

     o    immediately after the transaction, no event of default occurs and
          continues; and

     o    we meet other conditions specified in the indenture. (Section 8.1).

MODIFICATION AND WAIVER

     We and the trustee may modify and amend the indenture with the consent of
the holders of a majority in aggregate principal amount of the outstanding debt
securities of each affected series. However, without the consent of each holder,
we cannot modify or amend the indenture in a way that would:

     o    change the stated maturity of the principal of, or any premium or
          installment of interest on or payment of any additional amounts under,
          any debt security;

     o    reduce the principal amount of, or the interest rate on, any debt
          security;

     o    reduce the principal payable upon acceleration, or provable in
          bankruptcy, of any debt security issued with original issue discount;

     o    change the redemption provisions or adversely affect the right of
          prepayment of any debt security;

     o    change the place or currency of payment of principal or interest on
          any debt security;

     o    impair the right to sue to enforce any payment on any debt security
          after it is due;

     o    reduce the percentage in principal amount of outstanding debt
          securities necessary to modify or amend the indenture, to waive
          compliance with some requirements of the indenture or some defaults or
          reduce the quorum requirements of meetings of holders of debt
          securities;

     o    modify the provisions of the indenture summarized in this paragraph;
          or

     o    make any changes that adversely affects the rights to convert or
          exchange any debt securities. (Section 9.2).

     The holders of a majority in aggregate principal amount of outstanding debt
securities of any series may waive our compliance with some restrictive
covenants of the indenture with respect to the outstanding debt securities of
that series. (Section 10.8). The holders of a majority in principal amount of
the outstanding debt securities of any series may waive any past default under
the indenture with respect to outstanding debt securities of that series, which
will be binding on all holders of debt securities of that series, except a
default in the payment of principal or of premium or interest on any debt
security of that series or in respect of a



                                       11



provision of the indenture that cannot be modified or amended without each
holder's consent. (Sections 5.8 and 5.13).

EVENTS OF DEFAULT

     Each of the following will be an event of default:

     o    default for 30 days in the payment of any interest;

     o    default in the payment of principal or any premium;

     o    default in the deposit of any sinking fund payment;

     o    default in the performance of any other covenant in the indenture that
          continues for 60 days after written notice of such default;

     o    a failure to pay when due at maturity or a default that results in the
          acceleration of maturity of any other debt of ours or our designated
          subsidiaries in an aggregate amount of $40 million or more, unless the
          acceleration is rescinded, stayed or annulled, or, in the case of debt
          we are contesting in good faith, we set aside a bond, letter of
          credit, escrow deposit or other cash equivalent sufficient to
          discharge the debt within 30 days after written notice of default is
          given to us by the trustee or holders of not less than 25% in
          principal amount of the outstanding debt securities of the series in
          default; and

     o    specified events in bankruptcy, insolvency or reorganization. (Section
          5.1).

     We are required to furnish the trustee annually a statement as to our
fulfillment of our obligations under the indenture. (Section 10.9). The trustee
may withhold notice of any default to the holders of debt securities of any
series, except a default on principal or interest payments on debt securities of
that series, if it considers it in the interest of the holders to do so.
(Section 6.3).

     If an event of default occurs and continues, either the trustee or the
holders of not less than 25% in principal amount of the outstanding debt
securities of the series in default may declare the principal amount immediately
due and payable by written notice to us and, if given by the holders, to the
trustee. Upon any declaration of default, the principal amount will become
immediately due and payable. However, the holders of a majority in principal
amount of the outstanding debt securities of that series may, under some
circumstances, rescind and annul the acceleration. (Section 5.2).

     Except for some duties in case of an event of default, the trustee is not
required to exercise any of its rights or powers at the request or direction of
any of the holders unless the holders offer the trustee reasonable security or
indemnity. (Section 6.2). If the holders provide this security or indemnity, the
holders of a majority in principal amount of the outstanding debt securities of
a series may direct the time, method and place of conducting any proceeding for
any remedy available to the trustee, or exercising any trust or powers conferred
on the trustee with respect to the debt securities of that series. (Section
5.12).

     No holder of a debt security may bring any lawsuit or other proceeding with
respect to the indenture or for any remedy under the indenture unless the holder
first gives the trustee written notice of a continuing event of default, the
holders of at least 25% in principal amount of the outstanding debt securities
of the series in default give the trustee a written request to bring the
proceeding and offer the trustee reasonable security or indemnity and the
trustee fails to institute the proceeding for 60 days after the written request
and has not received from holders of a majority in principal amount of the
outstanding debt securities of the series in default a direction inconsistent
with that request. (Section 5.7). However, the holder of any debt security has
the absolute right to receive payment of the principal of and any premium or
interest on the debt security on or



                                       12



after the stated due dates and to take any action to enforce any payment of
principal of and any interest on the debt security. (Section 5.8).

DISCHARGE, DEFEASANCE AND COVENANT DEFEASANCE

     We may discharge some obligations to holders of any series of debt
securities that have not already been delivered to the trustee for cancellation
and that either have become due and payable, will become due and payable within
one year or are scheduled for redemption within one year by depositing with the
trustee, in trust, funds in U. S. dollars or in the foreign currency in which
the debt securities are payable in an amount sufficient to pay the principal and
any premium, interest and additional amounts on the debt securities to the date
of deposit, if the debt securities have become due and payable, or to the
maturity date, as the case may be. (Section 4.1).

     Unless the applicable prospectus supplement states that the following
provisions do not apply to the debt securities of that series, we may elect
either:

     o    to defease and be discharged from any and all obligations with respect
          to the debt securities, except for, among other things, the obligation
          to pay additional amounts, if any, upon the occurrence of some events
          of taxation, assessment or governmental charge with respect to
          payments on the debt securities and other obligations to register the
          transfer or exchange of the debt securities, to replace temporary or
          mutilated, destroyed, lost or stolen debt securities, to maintain an
          office or agency with respect to the debt securities and to hold
          moneys for payment in trust, also referred to as defeasance; or

     o    to be released from our obligations under the indenture with respect
          to the debt securities under some covenants as described in the
          prospectus supplement, and our failure to comply with these
          obligations will not constitute an event of default with respect to
          the debt securities, also referred to as covenant defeasance. (Section
          4.2).

     Defeasance or covenant defeasance is conditioned on our irrevocable deposit
with the trustee, in trust, of an amount in cash or government securities, or
both, sufficient to pay the principal of, any premium and interest on, and any
additional amounts with respect to, the debt securities on the scheduled due
dates. (Section 4.2).

     Such a trust may be established only if, among other things:

     o    the applicable defeasance or covenant defeasance does not result in a
          breach or violation of, or constitute a default under, the indenture
          or any other material agreement or instrument to which we are a party
          or by which we are bound;

     o    no event of default, or event which with notice or lapse of time would
          become an event of default, has occurred and continues on the date the
          trust is established and, with respect to defeasance only, at any time
          during the period ending on the 123rd day after that date; and

     o    we have delivered to the trustee an opinion of counsel to the effect
          that the holders of the debt securities will not recognize income,
          gain or loss for U. S. federal income tax purposes as a result of the
          defeasance or covenant defeasance and will be subject to U. S. federal
          income tax on the same amounts, in the same manner and at the same
          times as would have been the case if the defeasance or covenant
          defeasance had not occurred. This opinion, in the case of defeasance,
          must refer to and be based upon a letter ruling we have received from
          the Internal Revenue Service, a revenue ruling published by the
          Internal Revenue Service or a change in applicable U. S. federal
          income tax law occurring after the date of the indenture. (Section
          4.2).



                                       13



GOVERNING LAW

     The indenture and the debt securities are governed by and will be
interpreted under the laws of the State of New York. (Section 1.13).

INFORMATION CONCERNING THE TRUSTEE

     Subject to the provisions of the Trust Indenture Act of 1939, the trustee
is under no obligation to exercise any of the powers vested in it by the
indenture at the request of any holder of debt securities unless the holder
offers the trustee reasonable indemnity against the costs, expenses and
liabilities which might result. The trustee is not required to expend or risk
its own funds or otherwise incur personal financial liability in performing its
duties if the trustee reasonably believes that it is not reasonably assured of
repayment or adequate indemnity. (Section 6.2).

     We and our subsidiaries maintain banking relationships in the ordinary
course of business with affiliates of Bank One Trust Company, National
Association. An affiliate of the trustee is a customer of our Mortgage Guaranty
Insurance subsidiary. In addition, an affiliate of the trustee may be one of the
underwriters, agents or dealers through whom we sell debt securities.




                                       14



                              PLAN OF DISTRIBUTION

     We may sell debt securities through agents, to or through underwriters,
through dealers or directly to purchasers. The applicable prospectus supplement
will state the terms of the offering of the debt securities, including the name
or names of any underwriters, dealers or agents, the purchase price of the debt
securities and the proceeds we will receive from the sale, any underwriting
discounts and commissions and other items constituting underwriters'
compensation, any initial public offering price, any discounts or concessions
allowed or reallowed or paid to dealers, and any securities exchange on which
the debt securities may be listed. The initial public offering price, discounts
or concessions allowed or reallowed or paid to dealers may be changed from time
to time.

     We may offer the debt securities in one or more transactions at a fixed
price or prices, which we may change, at market prices prevailing at the time of
sale, at prices related to the prevailing market prices or at negotiated prices.

     We may authorize agents to solicit offers to purchase debt securities from
time to time. We will identify any agent who offers or sells debt securities
described in this prospectus, and we will describe any commissions payable by us
to the agent, in the applicable prospectus supplement. Unless otherwise
indicated in the applicable prospectus supplement, any such agent will be acting
on a reasonable best efforts basis for the period of its appointment. Any agent
may be deemed to be an underwriter, as that term is defined in the Securities
Act of 1933, of the debt securities so offered and sold.

     If debt securities are sold by means of an underwritten offering, we will
execute an underwriting agreement with an underwriter or underwriters, and the
names of the specific managing underwriter or underwriters, as well as any other
underwriters, and the terms of the transaction, including commissions, discounts
and any other compensation of the underwriters and dealers, if any, will be
stated in the prospectus supplement used by the underwriters to resell the debt
securities. If we use underwriters to sell debt securities, the underwriters
will purchase the debt securities for their own account and the underwriters may
resell the debt securities from time to time in one or more transactions,
including negotiated transactions, at fixed public offering prices or at varying
prices determined by the underwriters at the time of sale. Debt securities may
be offered to the public either through underwriting syndicates represented by
managing underwriters or directly by the managing underwriters. If we use any
underwriter or underwriters to sell the debt securities, unless otherwise
indicated in the applicable prospectus supplement, the underwriters' obligations
will be conditioned on some matters and the underwriters must purchase all the
debt securities of the offered series if they purchase any.

     If we use a dealer to sell the debt securities, we will sell the debt
securities to the dealer as principal. The dealer may then resell those debt
securities to the public at varying prices to be determined by the dealer at the
time of resale. Any dealer may be deemed to be an underwriter, as that term is
defined in the Securities Act of 1933, of the debt securities it offers or
sells. The name of the dealer and the terms of the transaction will be stated in
the related prospectus supplement.

     We may directly solicit offers to purchase debt securities and we may sell
them directly to institutional investors or others, who, with respect to the
resale of those securities, may be deemed to be underwriters within the meaning
of the Securities Act of 1933. The terms of any direct sales will be described
in the related prospectus supplement.

     Agents, underwriters and dealers may be entitled under agreements with us
to be indemnified by us against some civil liabilities, including liabilities
under the Securities Act of 1933 that may arise from any untrue statement or
alleged untrue statement of a material fact or any omission or alleged omission
to state a material fact in this prospectus, any supplement or amendment hereto,
or in the registration statement of which this prospectus forms a part, or to
contribution with respect to payments which the agents, underwriters or dealers
may be required to make.



                                       15



     If so indicated in the prospectus supplement, we will authorize
underwriters or other persons acting as our agents to solicit offers by some
institutions to purchase debt securities from us pursuant to contracts providing
for payments and delivery on a future date. Institutions with which these
contracts may be made include commercial and savings banks, insurance companies,
pension funds, investment companies, educational and charitable institutions and
others, but in all cases we must approve these institutions. Purchaser
obligations will be subject to the condition that the purchase is not prohibited
under the laws of the jurisdiction to which the purchaser is subject at the time
the debt securities are delivered. The underwriters and other agents will not
have any responsibility for the validity or performance of these contracts.

     Each series of debt securities will be a new issue and will have no
established trading market. We may elect to list any series of debt securities
on an exchange but, unless otherwise stated in the applicable prospectus
supplement, we are not required to do so. You cannot be assured that there will
be a liquid trading market for any of the debt securities.

     Underwriters, dealers and agents may be customers of, engage in
transactions with, or perform services for, us and our subsidiaries in the
ordinary course of business.




                                       16



                       WHERE YOU CAN FIND MORE INFORMATION

     We file annual, quarterly and current reports, proxy statements and other
information with the Securities and Exchange Commission. Our SEC filings are
available to the public over the Internet at the SEC's web site at
http://www.sec.gov. You may also read and copy any document we file with the SEC
at its public reference facilities in Washington, D.C., New York, New York or
Chicago, Illinois. You can also obtain copies of the documents at prescribed
rates by writing to the Public Reference Section of the SEC at 450 Fifth Street,
N.W., Washington, D.C. 20549. Please call the SEC at 1-800-SEC-0330 for further
information on the operation of the public reference facilities. Our SEC filings
are also available at the office of the New York Stock Exchange, 20 Broad
Street, New York, New York 10005. For further information on obtaining copies of
our SEC filings at the NYSE, you should call (212) 656-5060.

     We have filed with the SEC a registration statement on Form S-3 under the
Securities Act of 1933 with respect to the debt securities. This prospectus does
not contain all of the information set forth in the registration statement, some
portions of which have been omitted in accordance with the rules and regulations
of the SEC. For further information, please refer to the registration statement.

     We are allowed to "incorporate by reference" the information we file with
the SEC, which means that we can disclose important information to you by
referring you to those documents. The information incorporated by reference is
an important part of this prospectus, and information that we file subsequently
with the SEC will automatically update and supersede the information included
and/or incorporated by reference in this prospectus. We incorporate by reference
the documents listed below and any future filings made with the SEC under
Sections 13(a), 13(c), 14 or 15(d) of the Securities Exchange Act of 1934 after
the initial filing of the registration statement that contains this prospectus
and prior to the time that the offering of the securities is completed:

     o    Our Annual Report on Form 10-K for the year ended December 31, 1999;


     o    Our Quarterly Reports on Form 10-Q for the quarters ended March 31,
          2000 and June 30, 2000; and


     o    Our Current Report on Form 8-K dated May 19, 2000.

     You may request a copy of these filings (other than exhibits, unless that
exhibit is specifically incorporated by reference into that filing) at no cost,
by writing or calling us at the following address:

                        MGIC Investment Corporation
                        MGIC Plaza
                        250 East Kilbourn Avenue
                        Milwaukee, Wisconsin 53202
                        (414) 347-6480
                        Attention: Secretary

     You should rely only on the information incorporated by reference or
provided in this prospectus or any prospectus supplement. We have not authorized
anyone else to provide you with different information. We are not making an
offer of these securities in any state where the state does not permit an offer.
You should not assume that the information in this prospectus or any prospectus
supplement is accurate other than as of any dates of this prospectus and any
prospectus supplement, regardless of the time of delivery of this prospectus and
any prospectus supplement or any sale of the debt securities.



                                       17



                                  LEGAL MATTERS

     The validity of the debt securities will be passed upon for us by Foley &
Lardner, Milwaukee, Wisconsin. Certain legal matters will be passed upon for the
underwriters, dealers or agents, if any, by Mayer, Brown & Platt, Chicago,
Illinois. Mayer, Brown & Platt will rely on the opinion of Foley & Lardner with
respect to matters of Wisconsin law.

                                     EXPERTS

     Our consolidated financial statements at December 31, 1999 and 1998, and
for each of the three years in the period ended December 31, 1999, incorporated
by reference in our Annual Report on Form 10-K for the year ended December 31,
1999, have been incorporated by reference into this prospectus and the
registration statement and have been audited by PricewaterhouseCoopers LLP,
independent auditors, as stated in their report thereon also incorporated by
reference in our Annual Report on Form 10-K and are included in reliance upon
such report given upon the authority of such firm as experts in accounting and
auditing.




                                       18



                                     PART II

                     INFORMATION NOT REQUIRED IN PROSPECTUS



ITEM 14. OTHER EXPENSES OF ISSUANCE AND DISTRIBUTION.

     The following table sets forth the estimated expenses in connection with
the issuance and distribution of the securities registered hereby, other than
underwriting discounts and commissions:

     Securities and Exchange Commission registration fee............ $132,000
     Trustee's fees and expenses....................................   15,000
     Printing expenses..............................................   30,000
     Rating agencies' fees..........................................  325,000
     Accounting fees and expenses...................................   75,000
     Legal fees and expenses........................................  100,000
     Blue Sky fees and expenses.....................................    5,000
     Miscellaneous..................................................    8,000
                                                                     --------
              Total................................................. $690,000
                                                                     ========

ITEM 15. INDEMNIFICATION OF OFFICERS AND DIRECTORS.

     Pursuant to the Wisconsin Business Corporation Law and the Registrant's
Amended and Restated Bylaws, directors and officers of the Registrant are
entitled to mandatory indemnification from the Registrant against certain
liabilities and expenses (1) to the extent such officers or directors are
successful in the defense of a proceeding and (2) in proceedings in which the
director or officer is not successful in defense thereof, unless (in the latter
case only) it is determined that the director or officer breached or failed to
perform his or her duties to the Registrant and such breach or failure
constituted: (a) a willful failure to deal fairly with the Registrant or its
shareholders in connection with a matter in which the director of officer had a
material conflict of interest; (b) a violation of the criminal law unless the
director or officer had reasonable cause to believe his or her conduct was
lawful or had no reasonable cause to believe his or her conduct was unlawful;
(c) a transaction from which the director or officer derived an improper
personal profit; or (d) willful misconduct. The Wisconsin Business Corporation
law specifically states that it is the public policy of Wisconsin to require or
permit indemnification, allowance of expenses and insurance in connection with a
proceeding involving securities regulation, as described therein, to the extent
required or permitted as described above. Additionally, under the Wisconsin
Business Corporation Law, directors of the Registrant are not subject to
personal liability to the Registrant, its shareholders or any person asserting
rights on behalf thereof for certain breaches or failures to perform any duty
resulting solely from their status as directors, except in circumstances
paralleling those in subparagraphs (a) through (d) outlined above.

     Expenses for the defense of any action for which indemnification may be
available may be advanced by the Registrant under certain circumstances.

     The indemnification provided by the Wisconsin Business Corporation Law and
the Registrant's Amended and Restated Bylaws is not exclusive of any other
rights to which a director or officer may be entitled. The Registrant also
maintains a liability insurance policy for its directors and officers as
permitted by Wisconsin law which may extend to, among other things, liability
arising under the Securities Act of 1933.



                                      II-1



ITEM 16. EXHIBITS.

     The exhibits filed herewith or incorporated by reference herein are
specified on the Exhibit Index included herein.

ITEM 17. UNDERTAKINGS

     (a)  The undersigned registrant hereby undertakes:

          (1)  To file, during any period in which offers or sales are being
     made, a post-effective amendment to this registration statement:

               (i)   To include any prospectus required by Section 10(a)(3) of
          the Securities Act of 1933;

               (ii)  To reflect in the prospectus any facts or events arising
          after the effective date of the registration statement (or the most
          recent post-effective amendment thereof) which, individually or in the
          aggregate, represent a fundamental change in the information set forth
          in the registration statement. Notwithstanding the foregoing, any
          increase or decrease in volume of securities offered (if the total
          dollar value of securities offered would not exceed that which was
          registered) and any deviation from the low or high end of the
          estimated maximum offering range may be reflected in the form of
          prospectus filed with the Commission pursuant to Rule 424(b) if, in
          the aggregate, the changes in volume and price represent no more than
          a 20 percent change in the maximum aggregate offering price set forth
          in the "Calculation of Registration Fee" table in the effective
          registration statement;

               (iii) To include any material information with respect to the
          plan of distribution not previously disclosed in the registration
          statement or any material change to such information in the
          registration statement;

     provided, however, that paragraphs (a)(i) and (a)(ii) do not apply if the
     information required to be included in a post-effective amendment by those
     paragraphs is contained in periodic reports filed with or furnished to the
     Commission by the registrant pursuant to Section 13 or 15(d) of the
     Securities Exchange Act of 1934 that are incorporated by reference in the
     registration statement.

          (2)  That, for the purpose of determining any liability under the
     Securities Act of 1933, each such post-effective amendment shall be deemed
     to be a new registration statement relating to the securities offered
     therein, and the offering of such securities at that time shall be deemed
     to be the initial bona fide offering thereof.

          (3)  To remove from registration by means of a post-effective
     amendment any of the securities being registered, which remain unsold at
     the termination of the offering.

     (b)  The undersigned registrant hereby undertakes that, for purposes of
determining any liability under the Securities Act of 1933, each filing of the
Registrant's annual report pursuant to Section 13(a) or 15(d) of the Securities
Exchange Act of 1934 that is incorporated by reference in the registration
statement shall be deemed to be a new registration statement relating to the
securities offered therein, and the offering of such securities at that time
shall be deemed to be the initial bona fide offering thereof.

     (c)  The undersigned registrant hereby undertakes that:

          (1)  For purposes of determining any liability under the Securities
     Act of 1933, the information omitted from the form of prospectus filed as
     part of this registration statement in reliance



                                      II-2



     upon Rule 430A and contained in a form of prospectus filed by the
     registrant pursuant to Rule 424(b)(1) or (4) or 497(h) under the Securities
     Act of 1933 shall be deemed to be part of this registration statement as of
     the time it was declared effective; and

          (2)  For the purpose of determining any liability under the Securities
     Act of 1933, each post-effective amendment that contains a form of
     prospectus shall be deemed to be a new registration statement relating to
     the securities offered therein, and the offering of such securities at that
     time shall be deemed to be the initial bona fide offering thereof.

     (d)  Insofar as indemnification for liabilities arising under the
Securities Act of 1933 may be permitted to directors, officers or controlling
persons of the registrant pursuant to the provisions set forth or described in
Item 15 of this registration statement, or otherwise, the registrant has been
informed that in the opinion of the Securities and Exchange Commission such
indemnification is against public policy as expressed in the Securities Act of
1933 and is, therefore, unenforceable. In the event that a claim for
indemnification against such liabilities (other than the payment by the
registrant of expenses incurred or paid by a director, officer or controlling
person of the registrant in the successful defense of any action, suit or
proceeding) is asserted by such director, officer or controlling person in
connection with the securities being registered, the registrant will, unless in
the opinion of its counsel the matter has been settled by controlling precedent,
submit to a court of appropriate jurisdiction the question whether such
indemnification by it is against public policy as expressed in the Securities
Act of 1933 and will be governed by the final adjudication of such issue.



                                      II-3



                                   SIGNATURES


     Pursuant to the requirements of the Securities Act of 1933, as amended, the
Registrant certifies that it has reasonable grounds to believe that it meets all
of the requirements for filing on Form S-3 and has duly caused this Amendment to
the Registration Statement to be signed on its behalf by the undersigned,
thereunto duly authorized, in the City of Milwaukee, State of Wisconsin, on the
8th day of September, 2000.


                                       MGIC INVESTMENT CORPORATION



                                       By:  /s/ Patrick Sinks
                                          --------------------------------------
                                           Patrick Sinks
                                           Senior Vice President, Controller and
                                           Chief Accounting Officer

     Pursuant to the requirements of the Securities Act of 1933, as amended,
this Amendment to the Registration Statement has been signed by the following
persons in the capacities indicated below on the 8th day of September, 2000.


            Signature                                       Title
            ---------                                       -----


                *                            President, Chief Executive Officer
- ----------------------------------           and Director
          Curt S. Culver                     (Principal Executive Officer)

                *                            Executive Vice President and Chief
- ----------------------------------           Financial Officer
         J. Michael Lauer                    (Principal Financial Officer)

                *                            Senior Vice President, Controller
- ----------------------------------           and Chief Accounting Officer
          Patrick Sinks                      (Principal Accounting Officer)

                *                            Director
- ----------------------------------
         James A. Abbott

                *                            Director
- ----------------------------------
          Mary K. Bush

                *                            Director
- ----------------------------------
          Karl E. Case

                *                            Director
- ----------------------------------
        David S. Engelman

                *                            Director
- ----------------------------------
        James D. Ericson




                                      II-4




                *                            Director
- ----------------------------------
          Daniel Gross

                *                            Director
- ----------------------------------
     Kenneth M. Jastrow, II

                *                            Director
- ----------------------------------
       Daniel P. Kearney

                *                            Director
- ----------------------------------
        Sheldon B. Lubar

                *                            Director
- ----------------------------------
       William A. McIntosh

                *                            Director
- ----------------------------------
         Leslie M. Muma

                *                            Director
- ----------------------------------
         Edward J. Zore



* By: /s/ Patrick Sinks
     -------------------------------------
      Patrick Sinks
      Attorney-in-Fact and Individually





                                      II-5



                                  EXHIBIT INDEX




Exhibit
Number        Description
- -------       -----------


(1)           Form of Underwriting Agreement. *

(4)           Form of Indenture between MGIC Investment Corporation and Bank One
              Trust Company, National Association, as Trustee. *

(5)           Opinion of Foley & Lardner.*


(12)          Computation of ratios of earnings to fixed charges.

(23.1)        Consent of PricewaterhouseCoopers LLP.


(23.2)        Consent of Foley & Lardner (included in Exhibit 5).*

(24)          Powers of Attorney relating to subsequent amendments (included on
              the signature page to the Registration Statement).*

(25)          Form T-1 Statement of Eligibility under the Trust Indenture Act of
              1939 of Bank One Trust Company, National Association. *


*  Previously filed.






                                                MGIC INVESTMENT CORPORATION
                                     COMPUTATION OF RATIO OF EARNINGS TO FIXED CHARGES
                                             (AMOUNTS IN THOUSANDS OF DOLLARS)



Year ended December 31, Six months ended ------------------------------------------------------------- June 30, 2000 1999 1998 1997 1996 1995 ----------------- ---------- ---------- ---------- ---------- ---------- Income before taxes 383,303 681,010 554,585 465,373 365,028 291,409 Adjustment to income before taxes, less income or loss from equity investees, net (14,149) (12,700) (12,420) (7,100) 800 - ----------------- ---------- ---------- ---------- ---------- ---------- Earnings before income taxes 369,154 668,310 542,165 458,273 365,828 291,409 Fixed charges: Interest expense 13,673 20,402 18,624 6,399 3,793 3,821 Amortization of debt expense 54 93 53 - - - Rent expense (1/3) (reasonable approximation of the interest factor) 1,435 3,210 3,403 3,451 3,079 2,910 ----------------- ---------- ---------- ---------- ---------- ---------- Total fixed charges 15,162 23,705 22,080 9,850 6,872 6,731 Earnings before income taxes and fixed charges 384,316 692,015 564,245 468,123 372,700 298,140 Ratio of earnings to fixed charges 25.3 29.2 25.6 47.5 54.2 44.3


                       CONSENT OF INDEPENDENT ACCOUNTANTS


We hereby consent to the incorporation by reference in this Registration
Statement on Form S-3 of our report dated January 12, 2000 relating to the
financial statements, which appears in the 1999 Annual Report to Shareholders,
which is incorporated by reference in MGIC Investment Corporation's Annual
Report on Form 10-K for the year ended December 31, 1999. We also consent to the
incorporation by reference of our report dated January 12, 2000 relating to the
financial statement schedules, which appears in such Annual Report on Form 10-K.
We also consent to the reference to us under the heading "Experts" in such
Registration Statement.


/s/ PricewaterhouseCoopers LLP

PricewaterhouseCoopers LLP
Milwaukee, Wisconsin
September 7, 2000