As Filed with the Commission on April 29, 2008

                                                     1940 Act File No. 811-06698

                       SECURITIES AND EXCHANGE COMMISSION
                             Washington, D.C. 20549

                                    Form N-1A

         REGISTRATION STATEMENT UNDER THE INVESTMENT COMPANY ACT OF 1940

                               Amendment No. 19                                X

                         DWS EQUITY 500 INDEX PORTFOLIO
               (Exact Name of Registrant as Specified in Charter)

                    345 Park Avenue, New York, New York 10154
                    (Address of Principal Executive Offices)

                                 (617) 295-1000
                         (Registrant's Telephone Number)

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<CAPTION>
<S>                                                <C>
John Millette                               Copies to:  Burton M. Leibert
Two International Place                                 Willkie Farr & Gallagher LLP
Boston, MA 02110                                        787 Seventh Ave.
(Name and Address of Agent for Service)                 New York, NY  10019
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                                Explanatory Note

This Amendment to the Registrant's Registration Statement on Form N-1A (the
"Registration Statement") has been filed by the Registrant pursuant to Section
8(b) of the Investment Company Act of 1940, as amended. However, beneficial
interests in the series of the Registrant are not being registered under the
Securities Act of 1933, as amended (the "1933 Act"), because such interests will
be issued solely in private placement transactions that do not involve any
"public offering" within the meaning of Section 4(2) of the 1933 Act.
Investments in the Registrant's series may only be made by investment companies,
insurance company separate accounts, common or commingled trust funds or similar
organizations or entities that are "accredited investors" within the meaning of
Regulation D under the 1933 Act. The Registration Statement does not constitute
an offer to sell, or the solicitation of an offer to buy, any beneficial
interests in any series of the Registrant.

Potential investors to whom an offer of beneficial interests is made (and their
employees, representatives, and other agents) may disclose to any and all
persons, without limitation of any kind, the tax treatment and tax structure of
the transaction, or transactions, offered by or discussed in, this Registration
Statement and all materials of any kind (including tax opinions or other tax
analyses) that are provided to such person by, or on behalf of, the Portfolio in
connection with an investment in the Portfolio. For this purpose, "tax
treatment" is the purported or claimed Federal income tax treatment of a
transaction and "tax structure" is limited to any fact that may be relevant to
understanding the purported or claimed Federal income tax treatment of a
transaction.


<PAGE>


                         DWS Equity 500 Index Portfolio

                                     PART A

Responses to Items 1, 2, 3 and 8 have been omitted pursuant to paragraph 2(b) of
Instruction B of the General Instructions to Form N-1A.

ITEM     4. INVESTMENT OBJECTIVES, PRINCIPAL INVESTMENT STRATEGIES, RELATED
         RISKS AND DISCLOSURE OF PORTFOLIO HOLDINGS.

The investment objective of DWS Equity 500 Index Portfolio (the "Portfolio") may
be changed without shareholder approval. The investment objective of the
Portfolio is to seek to replicate, as closely as possible, before expenses, the
performance of the Standard & Poor's 500 Composite Stock Price Index (the "S&P
500 Index"), which emphasizes stocks of large US companies. The Portfolio
invests for capital appreciation, not income; any dividend and interest income
is incidental to the pursuit of its objective.

There can be no assurance that the Portfolio will achieve its investment
objective. Additional information about the investment policies of the Portfolio
appears in Part B of this Registration Statement. The Registrant incorporates by
reference information concerning the Portfolio's investment objective and
policies and risk factors associated with investments in the Portfolio from the
sections entitled "The Fund's Main Investment Strategy" and "The Main Risks of
Investing in the Fund" in the prospectuses of DWS Investment Trust -- DWS S&P
500 Index Fund (Class S, Class A, Class B and Class C) filed with the Commission
in Post-Effective Amendment No. 168 on April 29, 2008 (File Nos. 2-13628 and
811-00043) and DWS Institutional Funds -- DWS Equity 500 Index Fund (Class S and
Institutional Class) filed with the Commission in Post-Effective Amendment No.
72 on April 29, 2008 (File Nos. 33-34079 and 811-06071) (collectively, the
"Feeder Funds," the prospectuses of which are collectively referred to as the
"Feeder Funds' Prospectuses"). The Registrant incorporates by reference
information concerning the Portfolio's portfolio holdings from the sections
entitled "Other Policies and Risks" in the Feeder Funds' Prospectuses.

ITEM 5.  MANAGEMENT, ORGANIZATION AND CAPITAL STRUCTURE.

Capitalized terms used in this Part A have the same meaning as in the Feeder
Funds' prospectuses. Registrant incorporates by reference information concerning
the management of the Portfolio from the sections entitled "How Much Investors
Pay" and "Who Manages and Oversees the Fund and the Portfolio" in the Feeder
Funds' Prospectuses.

The Portfolio is organized as a trust under the laws of the State of New York.
The Portfolio's Declaration of Trust provides that investors in the Portfolio
(e.g., investment companies, insurance company separate accounts and common and
commingled trust funds) will each be liable for all obligations of the
Portfolio. However, the risk of an investor in the Portfolio incurring financial
loss on account of such liability is limited to circumstances in which both
inadequate insurance existed and the Portfolio itself was unable to meet its
obligations.

Investments in the Portfolio have no preemptive or conversion rights and are
fully paid and non-assessable, except as set forth below. The Portfolio is not
required and has no current intention to hold annual meetings of investors, but
the Portfolio will hold special meetings of investors when in the judgment of
the Trustees it is necessary or desirable to submit matters for an investor
vote. Changes in fundamental policies will be submitted to investors for
approval. Investors have under certain circumstances (e.g., upon application and
submission of certain specified documents to the Trustees by a specified number
of investors) the right to communicate with other investors in connection with
requesting a meeting of investors for the purpose of removing one or more
Trustees. Investors also have the right to remove one or more Trustees without a
meeting by a declaration in writing by a specified number of investors. Upon
liquidation of the Portfolio, investors would be entitled to share pro rata in
the net assets of the Portfolio available for distribution to investors.

Registrant incorporates by reference additional information concerning the
Portfolio's capital stock from the sections entitled "How to Buy Shares," "How
to Exchange or Sell Shares," "Buying and Selling Institutional Class Shares,"
"How to Buy, Sell and Exchange Shares," "How to Buy Class A, B and C Shares,"
"How to Exchange or


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<PAGE>

Sell Class A, B and C Shares," "Policies You Should Know About," "How the Fund
Calculates Share Price" and "Understanding Distributions and Taxes," in the
Feeder Funds' Prospectuses.

ITEM 6.  SHAREHOLDER INFORMATION.

The Registrant incorporates by reference information concerning computation of
net asset value and valuation of the Portfolio's assets from sections entitled
"How to Buy Shares," "How to Exchange or Sell Shares," "Buying and Selling
Institutional Class Shares," How to Buy, Sell and Exchange Shares," "How to Buy
Class A, B and C Shares," "How to Exchange or Sell Class A, B and C Shares,"
"Policies You Should Know About" and "How the Fund Calculates Share Price" in
the Feeder Funds' Prospectuses.

Beneficial interests in the Portfolio are issued solely in private placement
transactions that do not involve any "public offering" within the meaning of
Section 4(2) of the 1933 Act. Investments in the Trust may only be made by
investment companies, insurance company separate accounts, common or commingled
trust funds or similar organizations or entities that are "accredited investors"
within the meaning of Regulation D under the 1933 Act. This Registration
Statement does not constitute an offer to sell, or the solicitation of an offer
to buy, any "security" within the meaning of the 1933 Act.

The Portfolio may, at its own option, accept securities in payment for
interests. The securities delivered in payment for interests are valued by the
method described under "Purchase, Redemption and Pricing of Shares," in Part B
and the sections entitled "Valuation of Securities" and "Net Asset Value" in
each Feeder Fund's SAI as of the day the Portfolio receives the securities. This
is a taxable transaction to the investor. Securities may be accepted in payment
for interests only if they are, in the judgment of Deutsche Investment
Management Americas Inc., appropriate investments for the Portfolio. In
addition, securities accepted in payment for interests must: (i) meet the
investment objective and policies of the Portfolio; (ii) be acquired by the
Portfolio for investment and not for resale; (iii) be liquid securities which
are not restricted as to transfer either by law or liquidity of market; and (iv)
if stock, have a value which is readily ascertainable as evidenced by a listing
on a stock exchange, over the counter market or by readily available market
quotations from a dealer in such securities. The Portfolio reserves the right to
accept or reject at its own option any and all securities offered in payment for
its interests.

An investment in the Portfolio may be made without a sales load. All investments
are made at net asset value next determined if an order is received by the
Portfolio by the designated cutoff time for each accredited investor. The net
asset value of the Portfolio is determined on each day the New York Stock
Exchange ("NYSE") is open for business ("Portfolio Business Day"). The NYSE is
scheduled to be closed on the following holidays: New Year's Day, Dr. Martin
Luther King, Jr. Day, Presidents' Day, Good Friday, Memorial Day, Independence
Day, Labor Day, Thanksgiving and Christmas, and on the preceding Friday or
subsequent Monday when one of these holidays falls on a Saturday or Sunday,
respectively. The Portfolio's portfolio securities are valued primarily on the
basis of market quotations or, if quotations are not readily available, by a
method which the Board of Trustees believes accurately reflects fair value.

There is no minimum initial or subsequent investment in the Portfolio. However,
because the Portfolio intends to be as fully invested at all times as is
reasonably practicable in order to enhance the yield on its assets, investments
must be made in Federal funds (i.e., monies credited to the account of the
Portfolio's custodian bank by a Federal Reserve Bank).

An investor in the Portfolio may withdraw all or any portion of its investment
at the net asset value next determined if a withdrawal request in proper form is
furnished by the investor to the Portfolio by the designated cutoff time for
each accredited investor. The proceeds of a withdrawal will be paid by the
Portfolio in Federal funds normally on the Portfolio Business Day the withdrawal
is effected, but in any event within seven days. The Portfolio reserves the
right to pay redemptions in kind. Investments in the Portfolio may not be
transferred.

The right of any investor to receive payment with respect to any withdrawal may
be suspended or the payment of the withdrawal proceeds postponed during any
period in which the NYSE is closed (other than weekends or holidays) or trading
on the NYSE is restricted, or, to the extent otherwise permitted by the 1940
Act, if an emergency exists.


                                       3
<PAGE>

The Portfolio and DWS Scudder Distributors, Inc. ("DWS-SDI") reserve the right
to cease accepting investments at any time or to reject any investment order.

The placement agent for the Portfolio is DWS-SDI. The principal business address
of DWS-SDI is 222 South Riverside Plaza, Chicago, IL 60606. DWS-SDI receives no
additional compensation for serving as the placement agent for the Portfolio.

Registrant incorporates by reference information concerning the dividends and
distributions and tax consequences from the sections entitled "Understanding
Distributions and Taxes" in each Feeder Fund's Prospectus.

Under the anticipated method of operation of the Portfolio, the Portfolio will
not be subject to any income tax. However, each investor in the Portfolio will
be taxed on its share (as determined in accordance with the governing
instruments of the Portfolio) of the Portfolio's ordinary income and capital
gain in determining its income tax liability. The determination of such share
will be made in accordance with the Internal Revenue Code of 1986, as amended
(the "Code"), and regulations promulgated thereunder.

It is intended that the Portfolio's assets, income and distributions will be
managed in such a way that an investor in the Portfolio will be able to satisfy
the requirements of Subchapter M of the Code, assuming that the investor
invested all of its assets in the Portfolio.

ITEM 7.  DISTRIBUTION ARRANGEMENTS.

The Registrant incorporates by reference information concerning its
Master-Feeder structure from the sub-sections entitled "Organizational
Structure" in each Feeder Fund's Prospectus.



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<PAGE>

                         DWS Equity 500 Index Portfolio

                                     PART B

ITEM 9.  COVER PAGE AND TABLE OF CONTENTS.

The Prospectus of DWS Equity 500 Index Portfolio (the "Portfolio") dated May 1,
2008, which may be amended from time to time, provides the basic information
investors should know before investing. This Statement of Additional Information
("SAI"), which is not a Prospectus, is intended to provide additional
information regarding the activities and operations of the Portfolio and should
be read in conjunction with the Prospectus. You may request a copy of the
Prospectus or a paper copy of this SAI, if you have received it electronically,
free of charge by calling the Portfolio at (800) 621-1048.

                                TABLE OF CONTENTS
                                -----------------

FUND HISTORY

DESCRIPTION OF THE FUND AND ITS INVESTMENTS AND RISKS

MANAGEMENT OF THE FUND

CONTROL PERSONS AND PRINCIPAL HOLDERS OF SECURITIES

INVESTMENT ADVISORY AND OTHER SERVICES

PORTFOLIO MANAGERS

BROKERAGE ALLOCATION AND OTHER PRACTICES

CAPITAL STOCK AND OTHER SECURITIES

PURCHASE, REDEMPTION AND PRICING OF SHARES

TAXATION OF THE FUND

UNDERWRITERS

CALCULATION OF PERFORMANCE DATA

FINANCIAL STATEMENTS

ITEM 10. FUND HISTORY.

DWS Equity 500 Index Portfolio (the "Portfolio") was organized as a trust under
the laws of the State of New York on December 11, 1991. Effective February 6,
2006, the name of the Portfolio was changed from Scudder Equity 500 Index
Portfolio to DWS Equity 500 Index Portfolio.

ITEM 11. DESCRIPTION OF THE FUND AND ITS INVESTMENT AND RISKS.

The Portfolio is a no-load, open-end management investment company. Registrant
incorporates by reference information concerning the investment policies,
limitations and risks of the Portfolio from the sections entitled "Investment
Objectives, Policies and Restrictions," "Investment Restrictions" and
"Investment Policies and Techniques" in the SAIs of the Feeder Funds, DWS
Investment Trust -- DWS S&P 500 Index Fund (Class S, Class A, Class B and Class
C) filed with the Commission in Post-Effective Amendment No. 168 on April 29,
2008 (File Nos. 2-13628 and 811-00043) and DWS Institutional Funds -- DWS Equity
500 Index Fund (Class S and Institutional Class) filed with the Commission in
Post-Effective Amendment No. 72 on April 29, 2008 (File Nos. 33-34079 and
811-06071) (the "Feeder Funds' SAIs"). Capitalized terms used in this Part B
have the same meaning as in the Feeder Funds' SAIs.

ITEM 12. MANAGEMENT OF THE FUND.


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<PAGE>

Registrant incorporates by reference information concerning the management of
the Portfolio from the sections entitled "Management of the Trusts and
Portfolios" and "Management of the Fund" in the Feeder Funds' SAIs.

ITEM 13. CONTROL PERSONS AND PRINCIPAL HOLDERS OF SECURITIES.

As of April 8, 2008 DWS Equity 500 Index Fund, a series of DWS Institutional
Funds, and DWS S&P 500 Index Fund, a series of DWS Investment Trust, owned
approximately 80.59% and 19.41%, respectively, of the value of the outstanding
interests in the Portfolio. Because DWS Equity 500 Index Fund owns more than 25%
of the outstanding interests in the Portfolio, it could be deemed to control the
Portfolio, which means it may take actions without the approval of other
investors in the Portfolio.

ITEM 14. INVESTMENT ADVISORY AND OTHER SERVICES.

Registrant incorporates by reference information concerning the investment
advisory and other services provided for or on behalf of the Portfolio from the
sections entitled "Management of the Trusts and Portfolios" and "Management of
the Fund" in each Feeder Fund's SAI.

ITEM 15. PORTFOLIO MANAGERS.

Registrant incorporates by reference information concerning the Portfolio
Managers from the section entitled "Compensation of Portfolio Manager(s)" in the
Feeder Funds' SAIs.

ITEM 16. BROKERAGE ALLOCATION AND OTHER PRACTICES.

Registrant incorporates by reference information concerning the brokerage
allocation and other practices of the Portfolio from the section entitled
"Portfolio Transactions" in each Feeder Fund's SAI.

ITEM 17. CAPITAL STOCK AND OTHER SECURITIES.

Under the Declaration of Trust, the Trustees are authorized to issue beneficial
interests in the Portfolio. Investors are entitled to participate pro rata in
distributions of taxable income, loss, gain and credit of the Portfolio. Upon
liquidation or dissolution of the Portfolio, investors are entitled to share pro
rata in the Portfolio's net assets available for distribution to its investors.
Investments in the Portfolio have no preference, preemptive, conversion or
similar rights and are fully paid and non-assessable, except as set forth below.
Investments in the Portfolio may not be transferred.

Each investor is entitled to a vote in proportion to the amount of its
investment in the Portfolio. Investors in the Portfolio do not have cumulative
voting rights, and investors holding more than 50% of the aggregate beneficial
interests in the Portfolio may elect all of the Trustees if they choose to do so
and in such event the other investors in the Portfolio would not be able to
elect any Trustee. The Portfolio is not required and has no current intention to
hold annual meetings of investors but the Portfolio will hold special meetings
of investors when in the judgment of the Portfolio's Trustees it is necessary or
desirable to submit matters for an investor vote. No material amendment may be
made to the Portfolio's Declaration of Trust without the affirmative majority
vote of investors (with the vote of each being in proportion to the amount of
its investment).

The Portfolio may enter into a merger or consolidation, or sell all or
substantially all of its assets, if approved by the vote of two thirds of its
investors (with the vote of each being in proportion to its percentage of the
beneficial interests in the Portfolio), except that if the Trustees recommend
such sale of assets, the approval by vote of a majority of the investors (with
the vote of each being in proportion to its percentage of the beneficial
interests of the Portfolio) will be sufficient. The Portfolio may also be
terminated (i) upon liquidation and distribution of its assets if approved by
the vote of two thirds of its investors (with the vote of each being in
proportion to the amount of its investment) or (ii) by the Trustees by written
notice to its investors.

Investors in the Portfolio will be held personally liable for its obligations
and liabilities, subject, however, to indemnification by the Portfolio in the
event that there is imposed upon an investor a greater portion of the
liabilities and obligations of the Portfolio than its proportionate beneficial
interest in the Portfolio. The Declaration of Trust


                                       6
<PAGE>

also provides that the Portfolio shall maintain appropriate insurance (for
example, fidelity bonding and errors and omissions insurance) for the protection
of the Portfolio, its investors, Trustees, officers, employees and agents,
covering possible tort and other liabilities. Thus, the risk of an investor
incurring financial loss on account of investor liability is limited to
circumstances in which both inadequate insurance existed and the Portfolio
itself was unable to meet its obligations.

The Declaration of Trust further provides that obligations of the Portfolio are
not binding upon the Trustees individually but only upon the property of the
Portfolio and that the Trustees will not be liable for any action or failure to
act, but nothing in the Declaration of Trust protects a Trustee against any
liability to which he would otherwise be subject by reason of willful
misfeasance, bad faith, gross negligence, or reckless disregard of the duties
involved in the conduct of his office.

ITEM 18. PURCHASE, REDEMPTION AND PRICING OF SHARES.

Beneficial interests in the Portfolio are issued solely in private placement
transactions that do not involve any "public offering" within the meaning of
Section 4(2) of the 1933 Act. See Item 6 "Shareholder Information" in Part A of
this Registration Statement.

Registrant incorporates by reference information concerning the method followed
by the Portfolio in determining its net asset value and the timing of such
determinations from the sections entitled "Valuation of Securities" and "Net
Asset Value" in each Feeder Fund's SAI.

ITEM 19.  TAXATION OF THE FUND.

Registrant incorporates by reference information concerning the taxation of the
Portfolio from the section entitled "Taxes" in each Feeder Fund's SAI.

It is intended that the Portfolio's assets, income and distributions will be
managed in such a way that an investor in the Portfolio will be able to satisfy
the requirements of Subchapter M of the Code, assuming that the investor
invested all of its assets in the Portfolio.

There are certain tax issues that will be relevant to only certain of the
investors in the Portfolio. All investors are advised to consult their own tax
advisors as to the tax consequences of an investment in the Portfolio.

ITEM 20. UNDERWRITERS.

The placement agent for the Portfolio is DWS-SDI, which receives no additional
compensation for serving in this capacity. Investment companies, insurance
company separate accounts, common and commingled trust funds and similar
organizations and entities may continuously invest in the Portfolio.

ITEM 21. CALCULATION OF PERFORMANCE DATA.

Not applicable.

ITEM 22. FINANCIAL STATEMENTS.

The financial statements for the Portfolio are incorporated herein by reference
from (1) DWS Institutional Funds -- DWS Equity 500 Index Fund (Institutional and
Class S) Annual Report dated December 31, 2007 (File Nos. 33-34079 and
811-06071) and (2) DWS Investment Trust -- DWS S&P 500 Index Fund (Classes A, B,
C, and S) Annual Report dated December 31, 2007 (File Nos. 2-13628 and
811-00043). A copy of each Annual Report may be obtained without charge by
contacting the Funds.



                                       7
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                         DWS Equity 500 Index Portfolio

                           PART C -- OTHER INFORMATION

Responses to Items 23(e) and (i)-(k) have been omitted pursuant to paragraph
2(b) of Instruction B of the General Instructions to Form N-1A.

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ITEM 23. EXHIBITS.

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(a)                   Conformed copy of Declaration of Trust of the Registrant; 2

               (i)    Amendment No. 1 to Declaration of Trust; 2

               (ii)   Certificate of Amendment dated May 16, 2003; 8;

               (iii)  Certificate of Amendment to the Declaration of Trust dated February 6, 2006; 11

(b)                   By-Laws of the Registrant; 2

(c)                   Not applicable.

(d)            (i)    Investment Sub-Advisory Agreement dated April 25, 2003, between Deutsche Asset Management,
                      Inc., and Northern Trust Investments, Inc. on behalf of the Registrant dated April 25,
                      2003; 8

               (ii)   Investment Advisory Agreement dated April 25, 2003 between Equity 500 Index Portfolio and
                      Deutsche Asset Management, Inc. dated April 25, 2003; 8

               (iii)  Amended and Restated Investment Management Agreement dated January 1, 2007, between DWS
                      Equity 500 Index Portfolio and Deutsche Investment Management Americas Inc.; 12

               (iv)   Amended and Restated Investment Management Agreement dated June 1, 2006, between DWS Equity
                      500 Index Portfolio and Deutsche Investment Management Americas Inc.; 12

(f)                   Not applicable.

(g)                   Master Custodian Agreement between the Registrant and State Street Bankers Trust Co. dated
                      March 22, 2007 is filed herein;

(h)            (i)    Amended Administration Services Agreement dated June 1, 2006 and revised as of October 1,
                      2007, between the Registrant and Deutsche Investment Management Americas Inc. is filed
                      herein;

               (ii)   Form of Mutual Fund Rule 22c-2 Information Sharing Agreement between DWS Scudder
                      Distributors, Inc. and certain financial intermediaries is filed herein;

               (iii)  Exclusive Placement Agent Agreement dated August 19, 2002 between Registrant and Scudder
                      Distributors; +

               (iv)   Copy of Exhibit A to Exclusive Placement Agent Agreement; +

               (v)    Expense Limitation Agreement dated April 30, 2001 among Registrant, Bankers Trust Company,
                      Deutsche Asset Management, Inc., BT Institutional Funds, Cash Management Portfolio,
                      Treasury Money Portfolio, International Equity Portfolio and BT Investment Portfolios; 6


                                       8
<PAGE>

               (vi)   Expense Limitation Agreement dated April 30, 2001, among Registrant, Deutsche Asset
                      Management, Inc., BT Pyramid Mutual Funds, Cash Management Portfolio, Asset Management
                      Portfolio and BT Investment Portfolios; 6

               (vii)  Expense Limitation Agreement dated April 25, 2003 among BT Institutional Funds, Equity 500
                      Index Portfolio, Deutsche Asset Management, Inc. and Investment Company Capital Corp.; 8

               (viii) Expense Limitation Agreement dated April 25, 2003 among BT Pyramid Mutual Funds, Equity 500
                      Index Portfolio, Deutsche Asset Management, Inc. and Investment Company Capital Corp.; 8

               (ix)   Sub-Administration and Sub-Accounting Agreement between Registrant and State Street Bank
                      and Trust Co. dated April 1, 2003; 8

               (x)    Transfer Agency Agreement and Service Agreement,  dated June 1, 2006,  between DWS Equity
                      Index Portfolio and DWS Scudder Investments Service Company; 12.

(l)                   Investment representation letters of initial investors; 1

(m)                   Not applicable.

(n)                   Not applicable.

(o)                   Not applicable.

(p)            (i)    Northern Trust Corporation Code of Ethics dated January 2001, 8

               (ii)   Deutsche Asset Management - U.S. Code of Ethics, dated January 1, 2008 are filed herein;

               (iii)  The Code of Ethics of Northern Trust Investments, N.A; 11

               (iv)   Consolidated Code of Ethics, dated March 13, 2006; 12


________________________________

+        Previously filed.

1        Incorporated by reference to Registrant's registration statement on
         Form N-1A ("Registration Statement") as filed with the Securities and
         Exchange Commission ("Commission") on June 9, 1992.

2        Incorporated by reference to Amendment No. 4 to Registrant's Registration Statement as filed
         with the Commission on April 26, 1996.

3        Incorporated by reference to Amendment No. 5 to Registrant's Registration Statement as filed
         with the Commission on March 19, 1997.

4        Incorporated by reference to Amendment No. 6 to Registrant's Registration Statement as filed
         with the Commission on June 2, 1997.

5        Incorporated by reference to Amendment No. 10 to Registrant's Registration Statement as filed
         with the Commission on April 28, 2000.

6        Incorporated by reference to Amendment No. 11 to Registrant's Registration Statement as filed
         with the Commission on April 30, 2001.


                                       9
<PAGE>

7        Incorporated by reference to Amendment No. 13 to Registrant's Registration Statement as filed
         with the Commission on May 1, 2003.

8        Incorporated by reference to Amendment No. 14 to Registrant's Registration Statement as filed
         with the Commission on May 1, 2004.

9        Incorporated by reference to Amendment No. 15 to Registrant's Registration Statement as filed
         with the Commission on February 15, 2004.

10       Incorporated by reference to Amendment No. 16 to Registrant's Registration Statement as filed
         with the Commission on April 29, 2005.

11       Incorporated by reference to Amendment No. 17 to Registrant's Registration Statement as filed
         with the Commission on April 28, 2006.

12       Incorporated by reference to Amendment No. 18 to Registrant's Registration Statement as filed
         with the Commission on April 30, 2007.
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ITEM 24.          PERSONS CONTROLLED BY OR UNDER COMMON CONTROL WITH THE FUND.

None.

ITEM 25. INDEMNIFICATION.


Article V, Section 5.4 of the of the Registrant's Declaration of Trust (Exhibit
(a)(1) hereto, which is incorporated herein by reference) provides in effect
that the Registrant will indemnify its officers and trustees under certain
circumstances. However, in accordance with Section 17(h) and 17(i) of the
Investment Company Act of 1940 and its own terms, said Article of the
Declaration of Trust does not protect the Registrant's officers and trustees
against any liability to the Registrant or its shareholders to which such
officer or trustee with respect to any matter as to which such person shall have
been adjudicated to have acted in willful misfeasance, bad faith, gross
negligence, or reckless disregard of the duties involved in the conduct of his
or her office.

Each of the trustees who is not an "interested person" (as defined under the
Investment Company Act of 1940) of Registrant (a "Non-interested Trustee") has
entered into an indemnification agreement with Registrant, which agreement
provides that the Registrant shall indemnify the Non-interested Trustee against
certain liabilities which such Trustee may incur while acting in the capacity as
a trustee, officer or employee of the Registrant to the fullest extent permitted
by law, now or in the future, and requires indemnification and advancement of
expenses unless prohibited by law. The indemnification agreement cannot be
altered without the consent of the Non-interested Trustee and is not affected by
amendment of the Agreement and Declaration of Trust. In addition, the
indemnification agreement adopts certain presumptions and procedures which may
make the process of indemnification and advancement of expenses more timely,
efficient and certain. In accordance with Section 17(h) of the Investment
Company Act of 1940, the indemnification agreement does not protect a
Non-interested Trustee against any liability to the Registrant or its
shareholders to which such Trustee would otherwise be subject by reason of
willful misfeasance, bad faith, gross negligence, or reckless disregard of the
duties involved in the conduct of his or her office.

The Registrant has purchased insurance policies insuring its officers and
trustees against certain liabilities which such officers and trustees may incur
while acting in such capacities and providing reimbursement to the Registrant
for sums which it may be permitted or required to pay to its officers and
trustees by way of indemnification against such liabilities, subject to certain
deductibles.

On April 5, 2002, Zurich Scudder Investments, Inc. ("Scudder"), the investment
adviser, now known as Deutsche Investment Management Americas Inc., was acquired
by Deutsche Bank AG, not including certain U.K. Operations (the "Transaction").
In connection with the Trustees' evaluation of the Transaction, Deutsche Bank
agreed to indemnify, defend and hold harmless Registrant and the trustees who
were not "interested persons" of Scudder, Deutsche Bank or Registrant (the
"Non-interested Trustees") for and against any liability and claims and expenses

                                       10
<PAGE>

based upon or arising from, whether in whole or in part, or directly or
indirectly, any untrue statement or alleged untrue statement of a material fact
made to the Independent Trustees by Deutsche Bank in connection with the
Non-interested Trustees' consideration of the Transaction, or any omission or
alleged omission of a material fact necessary in order to make statements made,
in light of the circumstances under which they were made, not misleading.

Deutsche Investment Management Americas Inc. ("DIMA"), the investment advisor,
has agreed, subject to applicable law and regulation, to indemnify and hold
harmless the Registrant against any loss, damage, liability and expense,
including, without limitation, the advancement and payment, as incurred, of
reasonable fees and expenses of counsel (including counsel to the Registrant and
counsel to the Non-interested Trustees) and consultants, whether retained by the
Registrant or the Non-interested Trustees, and other customary costs and
expenses incurred by the Registrant in connection with any litigation or
regulatory action related to possible improper market timing or other improper
trading activity or possible improper marketing and sales activity in the
Registrant ("Private Litigation and Enforcement Actions"). In the event that
this indemnification is unavailable to the Registrant for any reason, then DIMA
has agreed to contribute to the amount paid or payable by the Registrant as a
result of any loss, damage, liability or expense in such proportion as is
appropriate to reflect the relative fault of DIMA and the Registrant with
respect to the matters which resulted in such loss, damage, liability or
expense, as well as any other relevant equitable considerations; provided,
however, if no final determination is made in such action or proceeding as to
the relative fault of DIMA and the Registrant, then DIMA shall pay the entire
amount of such loss, damage, liability or expense.

In recognition of its undertaking to indemnify the Registrant, DIMA has also
agreed, subject to applicable law and regulation, to indemnify and hold harmless
each of the Non-interested Trustees against any and all loss, damage, liability
and expense, including without limitation the advancement and payment as
incurred of reasonable fees and expenses of counsel and consultants, and other
customary costs and expenses incurred by the Non-interested Trustees, arising
from the Private Litigation and Enforcement, including without limitation:

1. all reasonable legal and other expenses incurred by the Non-interested
Trustees in connection with the Private Litigation and Enforcement Actions, and
any actions that may be threatened or commenced in the future by any person
(including any governmental authority), arising from or similar to the matters
alleged in the Private Litigation and Enforcement Actions, including without
limitation expenses related to the defense of, service as a witness in, or
monitoring of such proceedings or actions;

2. all liabilities and expenses incurred by any Non-interested Trustee in
connection with any judgment resulting from, or settlement of, any such
proceeding, action or matter;

3. any loss or expense incurred by any Non-interested Trustee as a result of the
denial of, or dispute about, any insurance claim under, or actual or purported
rescission or termination of, any policy of insurance arranged by DIMA (or by a
representative of DIMA acting as such, acting as a representative of the
Registrant or of the Non-interested Trustees or acting otherwise) for the
benefit of the Non-interested Trustee, to the extent that such denial, dispute
or rescission is based in whole or in part upon any alleged misrepresentation
made in the application for such policy or any other alleged improper conduct on
the part of DIMA, any of its corporate affiliates, or any of their directors,
officers or employees;

4. any loss or expense incurred by any Non-interested Trustee, whether or not
such loss or expense is otherwise covered under the terms of a policy of
insurance, but for which the Non-interested Trustee is unable to obtain
advancement of expenses or indemnification under that policy of insurance, due
to the exhaustion of policy limits which is due in whole or in part to DIMA or
any affiliate thereof having received advancement of expenses or indemnification
under that policy for or with respect to a matter which is the subject of the
indemnification agreement; provided, however, the total amount which DIMA will
be obligated to pay under this provision for all loss or expense, will not
exceed the amount that DIMA and any of its affiliate actually receive under that
policy or insurance for or with respect to a matter which is the subject of the
indemnification agreement; and

5. all liabilities and expenses incurred by any Non-interested Trustee in
connection with any proceeding or action to enforce his or her rights under the
agreement, unless DIMA prevails on the merits of any such dispute in a final,
nonappealable court order.


                                       11
<PAGE>


DIMA is not required to pay costs or expenses or provide indemnification to or
for any individual Non-interested Trustee (i) with respect to any particular
proceeding or action as to which the Board of the Registrant has determined that
such Non-interested Trustee ultimately will not be entitled to indemnification
with respect thereto, or (ii) for any liability of the Non-interested Trustee to
the Registrant or its shareholders to which such Non-interested Trustee would
otherwise be subject by reason of willful misfeasance, bad faith, gross
negligence, or reckless disregard of the Non-interested Trustee's duties as a
Trustee of the Registrant as determined in a final adjudication in such
proceeding or action. In addition, to the extent that DeAM has paid costs or
expenses under the agreement to any individual Non-interested Trustee with
respect to a particular proceeding or action, and there is a final adjudication
in such proceeding or action of the Non-interested Trustee's liability to the
Registrant or its shareholders by reason of willful misfeasance, bad faith,
gross negligence, or reckless disregard of the Non-interested Trustee's duties
as a Trustee of the Registrant, such Non-interested Trustee has undertaken to
repay such costs or expenses to DIMA.



Item 26.          Business and Other Connections of Investment Advisor
--------          ----------------------------------------------------

                  During the last two fiscal years, no director or officer of
                  Deutsche Investment Management Americas Inc., the investment
                  advisor, has engaged in any other business, profession,
                  vocation or employment of a substantial nature other than that
                  of the business of investment management and, through
                  affiliates, investment banking.

Item 27.          Principal Underwriters
--------          ----------------------

                  (a)

                  DWS Scudder Distributors, Inc. acts as principal underwriter
                  of the Registrant's shares and acts as principal underwriter
                  for registered open-end management investment companies other
                  funds managed by Deutsche Investment Management Americas Inc.

                  (b)

                  Information on the officers and directors of DWS Scudder
                  Distributors, Inc., principal underwriter for the Registrant,
                  is set forth below. The principal business address is 222
                  South Riverside Plaza, Chicago, Illinois 60606.

<TABLE>
<CAPTION>
                      (1)                             (2)                                  (3)
          DWS Scudder Distributors,
          Inc.
          Name and Principal             Positions and Offices with               Positions and
          Business Address               DWS Scudder Distributors, Inc.           Offices with Registrant
          ----------------               ------------------------------           -----------------------
                <S>                               <C>                                       <C>
         Philipp Hensler                Director, Chairman of the Board and CEO   None
         345 Park Avenue
         New York, NY 10154

         Michael Colon                  Director and Chief Operating Officer      None
         345 Park Avenue
         New York, NY 10154

         Thomas Winnick                 Director and President                    None
         345 Park Avenue
         New York, NY 10154


                                       12
<PAGE>
                      (1)                             (2)                                  (3)
          DWS Scudder Distributors,
          Inc.
          Name and Principal             Positions and Offices with               Positions and
          Business Address               DWS Scudder Distributors, Inc.           Offices with Registrant
          ----------------               ------------------------------           -----------------------

         Cliff Goldstein                Chief Financial Officer and Treasurer     None
         60 Wall Street
         New York, NY 10005

         Robert Froehlich               Vice President                            None
         222 South Riverside Plaza
         Chicago, IL 60606

         Paul Schubert                  Vice President                            Chief Financial Officer
         345 Park Avenue                                                          and Treasurer
         New York, NY 10154

         Mark Perrelli                  Vice President                            None
         222 South Riverside Plaza
         Chicago, IL 60606

         Donna White                    Chief Compliance Officer                  None
         345 Park Avenue
         New York, NY 10154

         Jason Vazquez                  Vice President and AML Compliance Officer Anti-Money Laundering
         345 Park Avenue                                                          Compliance Officer
         New York, NY 10154

         Caroline Pearson               Secretary                                 Assistant Secretary
         Two International Place
         Boston, MA 02110

         Philip J. Collora              Assistant Secretary                       None
         222 South Riverside Plaza
         Chicago, IL 60606

         Anjie LaRocca                  Assistant Secretary                       None
         345 Park Avenue
         New York, NY 10154

         (c)      Not applicable

ITEM 28. LOCATION OF ACCOUNTS AND RECORDS.

         Registrant:                                         345 Park Avenue
                                                             New York, NY 10154

         Advisor and Administrator                           Deutsche Investment Management Americas Inc.
                                                             345 Park Avenue
                                                             New York, NY 10154

         Custodian:                                          State Street Bank and Trust Company
                                                             225 Franklin Street
                                                             Boston, MA  02110


                                       13
<PAGE>

         Transfer Agent:                                     DWS Scudder Investment Services Corporation
                                                             222 South Riverside Plaza
                                                             Chicago, IL 60606

         Sub-Transfer Agency and                             DST
         Sub-Dividend Distribution Agent:                    127 West 10th Street
                                                             Kansas City, MO 64105

         Placement Agent:                                    DWS Scudder Distributors, Inc.
                                                             222 South Riverside Plaza
                                                             Chicago, IL 60606
</TABLE>

ITEM 29. MANAGEMENT SERVICES.

Not Applicable.

ITEM 30. UNDERTAKINGS.

Not Applicable.





                                       14
<PAGE>


                                   SIGNATURES
                                   ----------

Pursuant  to the  requirements  of the  Investment  Company  Act  of  1940,  the
Registrant,  DWS EQUITY 500 INDEX PORTFOLIO,  has duly caused this Amendment No.
19 to its Registration  Statement on Form N-1A to be signed on its behalf by the
undersigned,  thereto duly  authorized  in the City of New York and the State of
New York, on the 15th day of April 2008.



                                       DWS EQUITY 500 INDEX PORTFOLIO


                                       By: /s/Michael G. Clark
                                           ______________________
                                           Michael G. Clark
                                           President



<PAGE>

                         DWS EQUITY 500 INDEX PORTFOLIO

                                Power of Attorney

KNOW ALL PERSONS BY THESE PRESENTS, that the following persons, whose signatures
appear below, do hereby constitute and appoint Thomas Connors, John Millette and
Caroline  Pearson,  and each of them,  severally,  or if more than one  acts,  a
majority of them,  their true and lawful  attorney and agent to execute in their
name,  place and stead (in such  capacity) any and all  amendments to enable DWS
EQUITY 500 INDEX  PORTFOLIO  (the "Fund") to comply with the  Securities  Act of
1933,  as amended (the "1933 Act") and the  Investment  Company Act of 1940,  as
amended (the "1940 Act"),  and any rules,  regulations  or  requirements  of the
Securities and Exchange  Commission in respect  thereof,  in connection with the
Fund's Registration Statement on Form N-1A pursuant to the 1933 Act and the 1940
Act,  together  with  any and all pre- and  post-effective  amendments  thereto,
including  specifically,  but without  limiting the generality of the foregoing,
the power and authority to sign in the name and on behalf of the  undersigned as
a trustee of the Fund such Registration  Statement and any and all such pre- and
post-effective  amendments  filed with the  Securities  and Exchange  Commission
under the 1933 Act and the 1940  Act,  and any other  instruments  or  documents
related  thereto,  and the  undersigned  does hereby ratify and confirm all that
said  attorney-in-fact  and  agent,  or  either of them or their  substitute  or
substitutes, shall lawfully do or cause to be done by virtue hereof.

<TABLE>
<CAPTION>
---------------------------------------------------------- ----------------------------- -----------------------------------
SIGNATURES                                                 TITLE                         DATE
---------------------------------------------------------- ----------------------------- -----------------------------------
<S>                                                          <C>                                <C>
/s/John W. Ballantine                                      Trustee                       April 1, 2008
John W. Ballantine
---------------------------------------------------------- ----------------------------- -----------------------------------

/s/Henry P. Becton, Jr.                                    Trustee                       April 1, 2008
Henry P. Becton, Jr.
---------------------------------------------------------- ----------------------------- -----------------------------------

/s/Dawn-Marie Driscoll                                     Trustee                       April 1, 2008
Dawn-Marie Driscoll
---------------------------------------------------------- ----------------------------- -----------------------------------

/s/Keith R. Fox                                            Trustee                       April 1, 2008
Keith R. Fox
---------------------------------------------------------- ----------------------------- -----------------------------------

/s/Paul K. Freeman                                         Trustee                       April 1, 2008
Paul K. Freeman
---------------------------------------------------------- ----------------------------- -----------------------------------

/s/Kenneth C. Froewiss                                     Trustee                       April 1, 2008
Kenneth C. Froewiss
---------------------------------------------------------- ----------------------------- -----------------------------------

/s/Richard J. Herring                                      Trustee                       April 1, 2008
Richard J. Herring
---------------------------------------------------------- ----------------------------- -----------------------------------

/s/William McClayton                                       Trustee                       April 1, 2008
William McClayton
---------------------------------------------------------- ----------------------------- -----------------------------------

/s/Rebecca W. Rimel                                        Trustee                       April 1, 2008
Rebecca W. Rimel
---------------------------------------------------------- ----------------------------- -----------------------------------

/s/William N. Searcy, Jr.                                  Trustee                       April 1, 2008
William N. Searcy, Jr.
---------------------------------------------------------- ----------------------------- -----------------------------------

/s/Jean Gleason Stromberg                                  Trustee                       April 1, 2008
Jean Gleason Stromberg
---------------------------------------------------------- ----------------------------- -----------------------------------

/s/Robert H. Wadsworth                                     Trustee                       April 1, 2008
Robert H. Wadsworth
---------------------------------------------------------- ----------------------------- -----------------------------------

/s/Axel Schwarzer                                          Trustee                       April 1, 2008
Axel Schwarzer
---------------------------------------------------------- ----------------------------- -----------------------------------
</TABLE>
<PAGE>


                         DWS EQUITY 500 INDEX PORTFOLIO

                                  Exhibit Index
                                  -------------

                                       (g)
                                     (h)(i)
                                     (h)(ii)
                                     (p)(ii)





                                       15