SEI INDEX FUNDS
485APOS, 1995-12-28
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<PAGE>
 
   
   AS FILED WITH THE SECURITIES AND EXCHANGE COMMISSION ON DECEMBER 28, 1995.
     
                                                                File No. 2-97111
                                                               File No. 811-4283
                                                                                

                       SECURITIES AND EXCHANGE COMMISSION
                             Washington, D.C. 20549

                                   FORM N-1A

                        REGISTRATION STATEMENT UNDER THE
                          SECURITIES ACT OF 1933  /  /
                            
                        POST-EFFECTIVE AMENDMENT NO. 18  /X/     
                                      and
                        REGISTRATION STATEMENT UNDER THE
                      INVESTMENT COMPANY ACT OF 1940  /  /
                                  
                              AMENDMENT NO. 20  /X/     

                                SEI INDEX FUNDS
               (Exact Name of Registrant as Specified in Charter)

                               c/o CT Corporation
                                2 Oliver Street
                          Boston, Massachusetts 02109
              (Address of Principal Executive Offices) (Zip Code)

       Registrant's Telephone Number, including Area Code (800) 932-7781

                                 Robert Nesher
                              c/o SEI Corporation
                            680 East Swedesford Road
                           Wayne, Pennsylvania 19087
                    (Name and Address of Agent for Service)

                                   Copies to:

Richard W. Grant, Esquire                            John H. Grady, Jr., Esquire
Morgan, Lewis & Bockius LLP                          Morgan, Lewis & Bockius LLP
2000 One Logan Square                                    1800 M Street, N.W.
Philadelphia, Pennsylvania 19103                       Washington, D.C.  20036

         

     / /  immediately upon filing pursuant to paragraph (b)
     / /  on [date] pursuant to paragraph (b)
     /X/  60 days after filing pursuant to paragraph (a)
     / /  on [date] pursuant to paragraph (a) of Rule 485.

Pursuant to the provisions of Rule 24f-2 under the Investment Company Act of
1940, an indefinite number of units of beneficial interest is being registered
by this Registration Statement.  Registrant's Rule 24f-2 Notice for fiscal year
ended March 31, 1995 was filed on May 23, 1995.
<PAGE>
 
                                SEI INDEX FUNDS
                             CROSS REFERENCE SHEET
                         Post-Effective Amendment No. 18     

<TABLE>
<CAPTION>

N-1A ITEM NO.                                                                         LOCATION
- --------------------------------------------------------------------------------------------------------------------
<S>                                                              <C>
PART A
Item 1.  Cover Page                                              Cover Page
Item 2.  Synopsis                                                *
Item 3.  Condensed Financial Information                         Financial Highlights
Item 4.  General Description of Registrant                       The Trust; Investment Objectives and Policies;
                                                                 General Investment Policies; General Information;
                                                                 Investment Limitations; Description of Permitted
                                                                 Investments and Risk Factors
Item 5.  Management of the Fund                                  General Information; The Administrator; The
                                                                 Manager and The Shareholder Servicing Agent;
                                                                 Distribution
Item 6.  Capital Stock and Other Securities                      Taxes; General Information;
Item 7.  Purchase of Securities Being Offered                    Purchase and Redemption of Shares
Item 8.  Redemption or Repurchase                                Purchase and Redemption of Shares
Item 9.  Pending Legal Proceedings                               *
 
PART B - ALL PORTFOLIOS
Item 10.  Cover Page                                             Cover Page
Item 11.  Table of Contents                                      Table of Contents
Item 12.  General Information and History                        The Trust
Item 13.  Investment Objectives and Policies                     Description of Permitted Investments; Investment
                                                                 Limitations
Item 14.  Management of the Registrant                           Trustees and Officers of the Trust; The
                                                                 Administrator
Item 15.  Control Persons and Principal Holders of Securities    Trustees and Officers of the Trust; 5%
                                                                 Shareholders
Item 16.  Investment Advisory and Other Services                 The Administrator; Distribution; Experts; The
                                                                 Manager and The Shareholder Servicing Agent;
                                                                 Custodian and Independent Public Accountant
Item 17.  Brokerage Allocation                                   Portfolio Transactions; Trading Practices and
                                                                 Brokerage
Item 18.  Capital Stock and Other Securities                     Description of Shares
Item 19.  Purchase, Redemption, and Pricing of Securities        Purchase and Redemption of Shares; Description of
          Being Offered                                          Shares; Determination of Net Asset Value
Item 20.  Tax Status                                             Taxes
Item 21.  Underwriters                                           Distribution
Item 22.  Calculation of Yield Quotations                        Performance
Item 23.  Financial Statements                                   Financial Information

</TABLE>
                                       i
<PAGE>
 
PART C

Information required to be included in Part C is set forth under the appropriate
item, so numbered, in Part C of the Registration Statement.
 
*Not Applicable

                                      ii
<PAGE>
 
The Prospectus for the Bond Index Portfolio and the Class A Shares of the S&P 
500 Index Portfolio and the Statement of Additional Information included as part
of Post-Effective Amendment No. 17 to the Registrant's Registration Statement on
Form N-1A (File No. 2-97111) filed with the Securities and Exchange Commission 
on May 31, 1995, is hereby incorporated by reference as if set forth in full 
herein.

<PAGE>
 
SEI INDEX FUNDS
   
     , 1996     
- --------------------------------------------------------------------------------
 
S&P 500 INDEX PORTFOLIO
       
- --------------------------------------------------------------------------------
   
This Prospectus sets forth concisely information about the above-referenced
Portfolio that an investor needs to know before investing. Please read this
Prospectus carefully, and keep it on file for future reference.     
   
A Statement of Additional Information dated July 31, 1995 has been filed with
the Securities and Exchange Commission and is available upon request and
without charge through the Distributor, SEI Financial Services Company, 680
East Swedesford Road, Wayne, PA 19087 or by calling 1-800-342-5734. The
Statement of Additional Information is incorporated into this Prospectus by
reference.     
   
SEI Index Funds (the "Trust") is an open-end investment management company that
offers financial institutions a convenient means of investing their own funds
or funds for which they act in a fiduciary, agency or custodial capacity in
professionally managed diversified portfolios of securities. Each Portfolio may
offer separate classes of shares that differ from each other primarily in the
allocation of certain distribution expenses. This Prospectus offers Class E
shares of the Trust's S&P 500 Index Portfolio (the "Portfolio").     
- --------------------------------------------------------------------------------
 
THESE SECURITIES HAVE NOT BEEN APPROVED OR DISAPPROVED BY THE SECURITIES AND
EXCHANGE COMMISSION OR ANY STATE SECURITIES COMMISSION NOR HAS THE SECURITIES
AND EXCHANGE COMMISSION OR ANY STATE SECURITIES COMMISSION PASSED UPON THE AC-
CURACY OR ADEQUACY OF THIS PROSPECTUS. ANY REPRESENTATION TO THE CONTRARY IS A
CRIMINAL OFFENSE.
 
 
 THE TRUST'S SHARES ARE NOT DEPOSITS OR OBLIGATIONS OF, OR GUARANTEED
 OR ENDORSED BY, ANY BANK. THE TRUST'S SHARES ARE NOT FEDERALLY IN-
 SURED BY THE FEDERAL DEPOSIT INSURANCE CORPORATION, THE FEDERAL RE-
 SERVE BOARD OR ANY OTHER GOVERNMENT AGENCY. INVESTMENT IN THE SHARES
 INVOLVES RISK, INCLUDING POSSIBLE LOSS OF PRINCIPAL.
<PAGE>
 
ANNUAL OPERATING EXPENSES (as a percentage of average net assets)
- --------------------------------------------------------------------------------
 
<TABLE>   
<CAPTION>
                                                 S&P 500
                                                  INDEX
                                                 -------
<S>                                              <C>
Management/Advisory Fees (after fee waiver) /1/   .15%
12b-1 Fees                                        .20%
Other Expenses                                    .05%
- --------------------------------------------------------
Total Operating Expenses (after waiver) /2/       .40%
- --------------------------------------------------------
</TABLE>    
   
1 The Manager has waived, on a voluntary basis, a portion of its fee, and the
  management/advisory fees shown reflect this voluntary waiver. The Manager
  reserves the right to terminate its waiver at any time in its sole
  discretion. Absent such fee waiver, management/advisory fees for the
  Portfolio would be .25%.     
       
   
2 Absent the voluntary fee waivers described above, total operating expenses
  for the Portfolio would be .50%. Additional information may be found under
  "The Manager and Shareholder Servicing Agent."     
 
EXAMPLE
- --------------------------------------------------------------------------------
An investor in a Portfolio would pay
the following expenses on a $1,000
investment assuming (1) 5% annual re-
turn and (2) redemption at the end of
each time period:
<TABLE>   
<CAPTION>
     1YR. 3YRS. 5YRS. 10YRS.
     ---- ----- ----- ------
     <S>  <C>   <C>   <C>  
     $ 4   $13   $22   $51
- ----------------------------
</TABLE>    
THE EXAMPLE SHOULD NOT BE CONSIDERED A REPRESENTATION OF PAST OR FUTURE
EXPENSES. ACTUAL EXPENSES MAY BE GREATER OR LESS THAN THOSE SHOWN.
   
The purpose of the expense table and example is to assist the investor in
understanding the various costs and expenses that may be directly or indirectly
borne by investors in shares of the Portfolio. A person who purchases shares
through a financial institution may be charged separate fees by that
institution. The information set forth in the foregoing table and example
relates only to the Portfolio's Class E shares (a class of shares of the
Portfolio). The Portfolio also offers Class A shares which are subject to the
same expenses, except there are different distribution costs. Additional
Information may be found under "The Manager and Shareholder Servicing Agent,"
"The Adviser" and "Distribution."     
 
                                                                    2
<PAGE>
 
FINANCIAL HIGHLIGHTS ___________________________________________________________
   
The following financial highlights, for a share outstanding throughout each
period, have been audited by Arthur Andersen LLP, independent public
accountants, whose report thereon was unqualified. This information should be
read in conjunction with the Trust's financial statements and notes thereto,
which are included in the Trust's Statement of Additional Information and which
appear, along with the report of Arthur Andersen LLP, in the Trust's March 31,
1995 Annual Report to Shareholders. Additional performance information is set
forth in the Annual Report to Shareholders and is available upon request and
without charge by calling 1-800-342-5734.     
   
FOR A CLASS A SHARE OUTSTANDING THROUGHOUT THE PERIOD**     
 
<TABLE>   
<CAPTION>
                       Income from Investment
                             Operations                                                   
                       ----------------------                                             
                                      Net
                                   Realized                     Less Distributions       
                                      and                --------------------------------                Net             Net
             Net Asset            Unrealized             Dividends                                      Asset          Assets,
              Value,      Net     Gain (Loss) Total from  from Net  Distributions Returns               Value,          End of
             Beginning Investment     on      Investment Investment from Capital    of        Total     End of Total    Period
             of Period Income /2/ Investments Operations   Income       Gains     Capital Distributions Period Return   (000)
- -------------------------------------------------------------------------------------------------------------------------------
- -----------------------
S&P 500 INDEX PORTFOLIO
=======================
<S>          <C>       <C>        <C>         <C>        <C>        <C>           <C>     <C>           <C>    <C>     <C>
4/1/94 to
3/31/95       $15.07     $0.42       $1.79      $2.21      $(0.42)     $(0.46)       --      $(0.88)    $16.40 15.26%  $458,012
4/1/93 to
3/31/94        15.80      0.43       (0.22)      0.21       (0.42)      (0.52)       --       (0.94)     15.07  1.19    424,647
4/1/92 to
3/31/93        14.17      0.40        1.69       2.09       (0.40)      (0.06)       --       (0.46)     15.80 14.97    675,484
4/1/91 to
3/31/92        13.43      0.40        1.01       1.41       (0.41)      (0.26)       --       (0.67)     14.17 10.71    470,847
4/1/90 to
3/31/91        12.45      0.43        1.24       1.67       (0.43)      (0.26)       --       (0.69)     13.43 14.18    261,165
4/1/89 to
3/31/90        10.88      0.42        1.64       2.06       (0.43)      (0.06)       --       (0.49)     12.45 19.02    192,154
4/1/88 to
3/31/89         9.63      0.39        1.26       1.65       (0.40)         --        --       (0.40)     10.88 17.60    125,714
4/1/87 to
3/31/88        12.68      0.43       (1.65)     (1.22)      (0.45)      (1.38)       --       (1.83)      9.63 (9.35)   105,473
4/1/86 to
3/31/87        12.45      0.42        2.63       3.05       (0.38)      (2.44)       --       (2.82)     12.68 25.96    103,468
8/1/85 to
3/31/86 /1/    10.00      0.29        2.37       2.66       (0.21)         --        --       (0.21)     12.45 40.43*    94,224
<CAPTION> 

                         Ratios and Supplemental Data
             ----------------------------------------------------
                                              Ratio of
                                                Net
                        Ratio of             Investment
             Ratios of  Expenses   Ratio of  Income to
             Expenses  to Average    Net      Average
                to     Net Assets Investment Net Assets
              Average  (Excluding Income to  (Excluding Portfolio
                Net       Fee      Average      Fee     Turnover
              Assets    Waivers)  Net Assets  Waivers)    Rate
- -----------------------------------------------------------------
<S>          <C>       <C>        <C>        <C>        <C>
4/1/94 to
3/31/95        0.25%      0.35%      2.69%      2.59%      4.00%
4/1/93 to
3/31/94        0.25       0.33       2.57       2.49      23.00
4/1/92 to
3/31/93        0.25       0.35       2.75       2.65       1.00
4/1/91 to
3/31/92        0.25       0.34       2.99       2.90       1.00
4/1/90 to
3/31/91        0.25       0.32       3.56       3.49      40.00
4/1/89 to
3/31/90        0.25       0.36       3.58       3.47      10.00
4/1/88 to
3/31/89        0.25       0.39       4.03       3.89      47.00
4/1/87 to
3/31/88        0.25       0.43       3.74       3.56      77.00
4/1/86 to
3/31/87        0.23       0.44       3.29       3.08     145.00
8/1/85 to
3/31/86 /1/    0.20*      0.44*      4.10*      3.86      66.00
</TABLE>    
* Annualized
   
** Class A share financial information is provided to investors for
   informational purposes only and should be referred to as an historical guide
   to the Portfolio's operations. Past performance does not indicate future
   results. Financial information for Class E shares will be provided to
   investors upon the completion of the Portfolio's fiscal year.     
1  Commenced operations on 8/1/85
2  Had management fees not been waived and certain other expenses not been
   absorbed by the Manager for the Portfolio, the net investment income per
   share would have been $.41, $.41, $.39, $.38, $.42, $.41, $.37, $.41, $.39
   and $.27 for the periods ending 3/31/95 through 3/31/86, respectively.
 
                                                                    3
<PAGE>
 
THE TRUST ______________________________________________________________________
   
SEI Index Funds (the "Trust") is an open-end management investment company that
has diversified portfolios. The Trust offers units of beneficial interest
("shares") in separate investment portfolios. The S&P 500 Index Portfolio (the
"Portfolio") has two separate classes of shares, Class A and Class E, which
provide for variations in distribution expenses. This prospectus offers Class E
shares of the Portfolio. Additional information pertaining to the Trust may be
obtained in writing from SEI Financial Services Company, 680 East Swedesford
Road, Wayne, PA 19087 or by calling 1-800-342-5734.     
 
INVESTMENT 
OBJECTIVES AND 
POLICIES _______________________________________________________________________

S&P 500 INDEX     The S&P 500 Index Portfolio seeks to provide investment
PORTFOLIO         results that correspond to the aggregate price and dividend
                  performance of the securities in the Standard & Poor's 500
                  Composite Stock Price Index (the "S&P 500 Index") which is
                  comprised of 500 selected common stocks, most which are
                  listed on the New York Stock Exchange. There is no assurance
                  that the Portfolio will achieve its investment objective.
                     The S&P 500 Index Portfolio's ability to duplicate the
                  performance of the S&P 500 Index will depend to some extent
                  on the size and timing and cashflows into and out of the
                  Portfolio as well as the extent of the Portfolio's expenses.
                     Adjustments made to accommodate cash flows will track the
                  index to the maximum extent possible and may result in
                  brokerage expenses for the Portfolio. Over time, the
                  correlation between the performance of the Portfolio and the
                  S&P 500 Index is expected to be over 0.95. A correlation of
                  1.00 would indicate perfect correlation, which would be
                  achieved when the net asset value of the Portfolio,
                  including the value of its dividend and capital gains
                  distributions, increased or decreased in exact proportion to
                  changes in the S&P 500 Index. An investment in shares of the
                  Portfolio involves risks similar to those of investing in a
                  portfolio consisting of the common stocks of some or all of
                  the companies included in the Index.
                     The Portfolio will normally be invested in all of the
                  stocks which comprise the S&P 500 Index, except when changes
                  are made to the S&P 500 Index itself. The Portfolio's policy
                  is to be fully invested in common stocks, and it is expected
                  that cash reserve items would normally be less than 10% of
                  net assets.
                     The weightings of stocks in the S&P 500 Index are based
                  on each stock's relative total market value, i.e., market
                  price per share times the number of shares outstanding.
                  Because of this weighting, approximately 50% of the S&P 500
                  Index is currently composed of the 50 largest companies in
                  the S&P 500 Index, and the S&P 500 Index currently
                  represents over 65% of the market value of all U.S. common
                  stocks listed on the New York Stock Exchange.
                     World Asset Management, the Portfolio's investment
                  adviser (the "Adviser" or "World"), makes no attempt to
                  "manage" the Portfolio in the traditional sense by using
                  economic, financial or market analysis. The adverse
                  financial situation of a company usually
 
                                                                    4
<PAGE>
 
                  will not result in the elimination of a stock from the
                  Portfolio. However, the Trust reserves the right, without
                  the obligation, to remove an investment from the Portfolio
                  if, in the judgment of World, the merit of the investment
                  has been substantially impaired by extraordinary events or
                  financial conditions. Furthermore, administrative
                  adjustments may be made in the Portfolio from time to time
                  because of mergers, changes in the composition of the S&P
                  500 Index and similar reasons. In certain circumstances,
                  World may exercise discretion in determining whether to
                  exercise warrants or rights issued in respect to portfolio
                  securities or whether to tender portfolio securities
                  pursuant to a tender or exchange offer.
                     The S&P 500 Index Portfolio is not sponsored, endorsed,
                  sold or promoted by Standard & Poor's Corporation ("S&P").
                  S&P makes no representation or warranty, implied or express,
                  to the purchasers of the Portfolio or any member of the
                  public regarding the advisability of investing in index
                  funds or the Portfolio or the ability of the Index to track
                  general stock market performance.
                     S&P DOES NOT GUARANTEE THE ACCURACY AND/OR THE
                  COMPLETENESS OF THE INDEX OR ANY DATA INCLUDED THEREIN. S&P
                  MAKES NO WARRANTY, EXPRESS OR IMPLIED, AS TO RESULTS TO BE
                  OBTAINED BY THE PORTFOLIO, OWNERS OF THE PORTFOLIO, OR ANY
                  DATA INCLUDED THEREIN. S&P MAKES NO EXPRESS OR IMPLIED
                  WARRANTIES, AND HEREBY DISCLAIMS ALL WARRANTIES OF
                  MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE OR USE
                  WITH RESPECT TO THE INDEX OR ANY DATA INCLUDED THEREIN.
                  S&P'S ONLY RELATIONSHIP TO THE PORTFOLIO IS THE LICENSING OF
                  THE S&P MARKS AND THE INDEX, WHICH IS DETERMINED, COMPOSED,
                  AND CALCULATED BY S&P WITHOUT REGARD TO THE LICENSEE OR THE
                  PORTFOLIO.
                     The equity securities in which the S&P 500 Index
                  Portfolio may invest are common stocks, preferred stocks,
                  warrants to acquire common stock and securities convertible
                  into common stock.
                     The Portfolio may enter into stock index futures
                  contracts, provided that the value of these contracts does
                  not exceed 20% of the Portfolio's total assets. The
                  Portfolio may purchase futures contracts solely to maintain
                  adequate liquidity to meet its redemption demands while
                  maximizing the level of the Portfolio's assets which are
                  tracking the performance of the Index. In addition, the
                  Portfolio may only purchase those stock index futures
                  contracts--such as futures contracts on the index--that are
                  likely to closely duplicate the performance of the S&P 500
                  Index. The Portfolio also can sell such futures contracts in
                  order to close out a previously established position. The
                  Portfolio will not enter into any stock index futures
                  contract for the purpose of speculation, and will only enter
                  into contracts traded on national securities exchanges with
                  standardized maturity dates. The Portfolio will not purchase
                  or sell futures contracts if immediately thereafter the sum
                  of the amount of margin deposits on its existing futures
                  positions would exceed 5% of its total assets.
 
                                                                    5
<PAGE>
 
                     The Portfolio may invest in the stock of foreign issuers
                  which is traded in the United States. The Portfolio
                  ordinarily will purchase securities of foreign issuers in
                  U.S. markets. However, the Portfolio may purchase securities
                  of foreign issuers directly in foreign markets if the
                  Adviser determines that it is in the best interest of the
                  Portfolio to do so.
                     The Portfolio may invest cash reserves in securities
                  issued by the U.S. Government, its agencies or
                  instrumentalities, bankers' acceptances, commercial paper
                  rated at least A-1 by S&P and/or Prime-1 by Moody's
                  Investors Services, Inc. ("Moody's"), certificates of
                  deposit and repurchase agreements involving such
                  obligations. Such investments will not be used for defensive
                  purposes.
 
GENERAL 
INVESTMENT 
POLICIES _______________________________________________________________________
                     
                  The Portfolio may lend up to 20% of its assets to qualified
                  institutions for the purpose of realizing additional income,
                  however the Portfolio has no present intention to lend its
                  securities. The Portfolio may invest in illiquid securities,
                  however, not more than 10% of the total assets of the
                  Portfolio will be invested in such instruments. The
                  Portfolio may enter into forward commitments, or purchase
                  securities on a when-issued or delayed delivery basis.     
                     
                     For additional information regarding the Portfolio's
                  permitted investments see "Description of Permitted
                  Investments and Risk Factors" in this Prospectus and in the
                  Statement of Additional Information. For a description of
                  the above ratings, see the Statement of Additional
                  Information.     
 
INVESTMENT 
LIMITATIONS ____________________________________________________________________
                     
                  The investment objective and investment limitations are
                  fundamental policies of the Portfolio. Fundamental policies
                  cannot be changed with respect to the Trust or a Portfolio
                  without the consent of the holders of a majority of the
                  Trust's or that Portfolio's outstanding shares.     
                     
                  The Portfolio may not:     
                     
                  1. Purchase securities of any issuer (except securities
                     issued or guaranteed by the United States Government, its
                     agencies or instrumentalities) and if, as a result, more
                     than 5% of total assets of the Portfolio would be
                     invested in the securities of such issuer. This
                     restriction applies to 75% of the Portfolio's total
                     assets.     
                  2. Purchase any securities which would cause more than 25%
                     of the total assets of the Portfolio to be invested in
                     the securities of one or more issuers conducting their
                     principal business activities in the same industry,
                     provided that this limitation does not
 
                                                                    6
<PAGE>
 
                   apply to investments in obligations issued or guaranteed by
                   the United States Government or its agencies and
                   instrumentalities.
                     
                  3. Borrow money except for temporary or emergency purposes
                     and then only in an amount not exceeding 10% of the value
                     of the total assets of the Portfolio. This borrowing
                     provision is included solely to facilitate the orderly
                     sale of portfolio securities to accommodate substantial
                     redemption requests if they should occur and is not for
                     investment purposes. All borrowings will be repaid before
                     making additional investments for the Portfolio and any
                     interest paid on such borrowings will reduce the
                     Portfolio's income.     
                  4. Make loans, except that the Portfolio may enter into
                     repurchase agreements, provided that repurchase
                     agreements and time deposits maturing in more than seven
                     days, and other illiquid securities, including securities
                     which are not readily marketable or are restricted, are
                     not to exceed, in the aggregate, 10% of the Portfolio's
                     total assets, may engage in securities lending as
                     described in this Prospectus and may purchase or hold
                     debt instruments in accordance with its investment
                     objectives and policies.
                  The foregoing percentage limitations will apply at the time
                  of the purchase of a security. Additional investment
                  limitations are set forth in the Statement of Additional
                  Information.
 
THE MANAGER 
AND SHAREHOLDER 
SERVICING AGENT ________________________________________________________________
                     
                  SEI Financial Management Corporation (the "Manager" or the
                  "Transfer Agent"), a wholly-owned subsidiary of SEI
                  Corporation ("SEI"), and the Trust are parties to a
                  management agreement (the "Management Agreement"). Under the
                  terms of the Management Agreement, the Manager is
                  responsible for providing the Trust with overall management
                  services, regulatory reporting, all necessary office space,
                  equipment, personnel and facilities and for acting as
                  transfer agent, dividend disbursing agent, and shareholder
                  servicing agent.     
                     
                     For these services, the Manager is entitled to a fee
                  which is calculated daily and paid monthly at an annual rate
                  of .22% of the average daily net assets of the Portfolio.
                  The Manager may from time to time waive all or a portion of
                  its fee in order to limit the operating expenses of the
                  Portfolio. Any such waiver is voluntary and may be
                  terminated at any time in its sole discretion.     
                     
                     For the fiscal year ended March 31, 1995, the Portfolio
                  paid management fees, after fee waivers, of .12% of its
                  average daily net assets.     
 
                                                                    7
<PAGE>
 
THE ADVISER ____________________________________________________________________

                  World Asset Management ("World" or the "Adviser") is a
                  general partnership organized by Munder Capital Management
                  ("MCM"), a general partnership formed in December, 1994,
                  which engages in investment management and advisory
                  services. As of December 31, 1994 total assets under
                  management of World were $6.0 billion and assets under
                  management of MCM were $29.5 billion. The principal business
                  address for the Adviser is 100 Renaissance Center, 38th
                  Floor, Detroit, Michigan 48275-3040.
                     The Adviser and the Trust are parties to an investment
                  advisory agreement relating to the Portfolios (the "Advisory
                  Agreement").
                     Under the terms of this Advisory Agreement, the Adviser
                  provides the Trust with certain record keeping and
                  management services in connection with the Portfolios
                  including monitoring the indexing systems and determining
                  which securities to purchase and sell in order to keep each
                  Portfolio in balance with its respective index.
                     
                     The Adviser is entitled to a fee, which is calculated
                  daily and paid monthly, at an annual rate of .03% of the
                  average daily net assets of each Portfolio. No monthly
                  payment to the Adviser shall exceed the payment actually
                  made to the Manager pursuant to the current Management
                  Agreement between the Manager and the Trust. For the fiscal
                  year ended March 31, 1995, the Portfolio paid advisory fees,
                  after waivers, of .03% of its average daily net assets to
                  each of Woodbridge Capital Management and World.     
 
DISTRIBUTION ___________________________________________________________________
        
                     
                  SEI Financial Services Company (the "Distributor"), a
                  wholly-owned subsidiary of SEI, serves as the Portfolio's
                  distributor pursuant to a distribution agreement (the
                  "Distribution Agreement") with the Trust. Each Class of the
                  Trust has adopted a distribution plan relating to its shares
                  (the "Class A Plan" and "Class E Plan", respectively),
                  pursuant to Rule 12b-1 under the Investment Company Act of
                  1940 (the "1940 Act").     
                     
                     The Class E Plan provides for reimbursement for expenses
                  incurred by the Distributor in an amount not to exceed .05%
                  of the average daily net assets of the Portfolio on an
                  annualized basis.     
                     
                     Distribution-related expenses reimbursable to the
                  Distributor under the budget include those related to the
                  costs of the printing, reports, prospectuses, notices and
                  similar materials for persons other than current
                  shareholders, advertising expenses and promotional and sales
                  expenses including expenses for travel, communication and
                  compensation and benefits for sales personnel. Distribution
                  expenses not attributable to a specific Portfolio are
                  allocated among each of the portfolios of the Trust based on
                  the     
 
                                                                    8
<PAGE>
 
                     
                  basis of their relative average net assets. The Trust is not
                  obligated to reimburse the Distributor for any expenditures
                  in excess of the approved budget.     
                     
                     The Class E Plan, in addition to providing for the
                  reimbursement payments described above, provides for
                  payments to the Distributor at an annual rate of .15% of the
                  Portfolio's average daily net assets attributable to Class E
                  shares. These payments are characterized as "compensation,"
                  and are not directly tied to expenses incurred by the
                  Distributor. Accordingly, the payments the Distributor
                  receives during any year may be higher or lower than its
                  actual expenses. These additional payments compensate the
                  Distributor for its services in connection with distribution
                  assistance or the provision of shareholder services, and
                  some or all of it may be used to pay financial institutions
                  and intermediaries such as banks, savings and loan
                  associations, insurance companies, and investment
                  counselors, broker-dealers (including the Distributor's
                  affiliates and subsidiaries) for services or reimbursement
                  of expenses incurred in connection with distribution
                  assistance or the provision of shareholder services.
                  Currently, the Distributor is taking this additional
                  compensation payment under the Class E Plan at a rate of
                  .15% of the Portfolio's average daily net assets, on an
                  annualized basis, attributable to Class E shares.     
                     
                     It is possible that an institution may offer different
                  classes of shares to its customers and thus receive
                  different compensation with respect to different classes.
                  These financial institutions may also charge separate fees
                  to their customers.     
                     
                     The Trust may execute brokerage or other agency
                  transactions through the Distributor for which the
                  Distributor may receive compensation.     
                     
                     The Distributor may, from time to time in its sole
                  discretion, institute one or more promotional incentive
                  programs, which will be paid for by the Distributor from the
                  sales charge it receives or from any other source available
                  to it. Under any such program, the Distributor will provide
                  promotional incentives, in the form of cash or other
                  compensation, including merchandise, airline vouchers, trips
                  and vacation packages, to all dealers selling shares of the
                  Portfolio. Such promotional incentives will be offered
                  uniformly to all shares of the Portfolio, and also will be
                  offered uniformly to all dealers, predicated upon the amount
                  of shares of the Portfolio sold by such dealer.     
                         
PURCHASE AND 
REDEMPTION 
OF SHARES   ____________________________________________________________________
                     
                  Financial institutions may acquire shares of the Portfolio
                  for their own account or as a record owner on behalf of
                  fiduciary, agency or custody accounts by placing orders with
                  the Transfer Agent. Institutions that use certain SEI
                  proprietary systems may place orders electronically through
                  those systems. State securities laws may require banks and
                  financial institutions purchasing shares for their customers
                  to register as dealers pursuant to state laws. Financial
                  institutions may impose an earlier cut-off time for receipt
                  of purchase orders directed through them to allow for
                  processing and transmittal of these orders to     
 
                                                                    9
<PAGE>
 
                     
                  the Transfer Agent for effectiveness the same day. Financial
                  institutions which purchase shares for the accounts of their
                  customers may impose separate charges on these customers for
                  account services. Shares of the Portfolio are offered only
                  to residents of states in which the shares are eligible for
                  purchase.     
                     
                     Shares of the Portfolio may be purchased or redeemed on
                  days on which the New York Stock Exchange is open for
                  business ("Business Days"). However, fund shares cannot be
                  purchased by Federal Reserve wire on federal holidays
                  restricting wire transfers.     
                     Shareholders who desire to purchase shares for cash must
                  place their orders with the Transfer Agent prior to 4:00
                  p.m. Eastern time on any Business Day for the order to be
                  accepted on that Business Day. Cash investments must be
                  transmitted or delivered in federal funds to the wire agent
                  on the next Business Day following the day the order is
                  placed. The Trust reserves the right to reject a purchase
                  order when the Distributor determines that it is not in the
                  best interest of the Trust or shareholders to accept such
                  purchase order.
                     
                     Purchases will be made in full and fractional shares of
                  the Portfolio calculated to three decimal places. The Trust
                  will send shareholders a statement of shares owned after
                  each transaction. The purchase price of shares is the net
                  asset value next determined after a purchase order is
                  received and accepted by the Trust. The net asset value per
                  share of the Portfolio is determined by dividing the total
                  market value of the Portfolio's investment and other assets,
                  less any liabilities, by the total outstanding shares of the
                  Portfolio. Net asset value per share is determined daily as
                  of the close of business of the New York Stock Exchange
                  (currently, 4:00 p.m. Eastern time) on any Business Day.
                      
                     The market value of each portfolio security is obtained
                  by the Manager from an independent pricing service. The
                  pricing service relies primarily on prices of actual market
                  transactions as well as trader quotations. However, the
                  pricing service may use a matrix system to determine
                  valuations of equity and fixed income securities. This
                  system considers such factors as security prices, yields,
                  maturities, call features, ratings and developments relating
                  to specific securities in arriving at valuations. The
                  pricing service may also provide market quotations. The
                  procedures of the pricing service and its valuations are
                  reviewed by the officers of the Trust under the general
                  supervision of the Trustees.
                     
                     Shareholders who desire to redeem shares of the Portfolio
                  must place their redemption orders with the Transfer Agent
                  prior to 4:00 p.m. Eastern time on any Business Day. The
                  redemption price is the net asset value per share of the
                  Portfolio next determined after receipt by the Transfer
                  Agent of the redemption order. Payment on redemption will be
                  made as promptly as possible and, in any event, within seven
                  days after the redemption order is received.     
                     
                     Shares of the Portfolio may be purchased in exchange for
                  securities included in the Portfolio subject to the
                  Manager's or the Adviser's determination that the securities
                  are acceptable. Securities accepted in an exchange will be
                  valued at market value. All accrued interest and
                  subscription of other rights which are reflected in the
                  market price of     
 
                                                                    10
<PAGE>
 
                  accepted securities at the time of valuation become the
                  property of the Trust and must be delivered by the
                  Shareholder to the Trust upon receipt from the issuer.
                     The Manager or Adviser will not accept securities for a
                  Portfolio unless (1) such securities are appropriate in the
                  Portfolio at the time of the exchange; (2) such an exchange
                  will not cause the Portfolio's weightings to become
                  materially imbalanced with respect to the weightings of the
                  securities included in the Index; (3) such securities are
                  acquired for investment and not for resale; (4) the
                  Shareholder represents and agrees that all securities
                  offered to the Trust for the Portfolio are not subject to
                  any restrictions upon their sale by the Portfolio under the
                  Securities Act of 1933, or otherwise; (5) such securities
                  are traded on the American Stock Exchange, the New York
                  Stock Exchange or on NASDAQ in an unrelated transaction with
                  a quoted sales price on the same day the exchange valuation
                  is made or, if not listed on such exchanges or on NASDAQ,
                  have prices available from an independent pricing service
                  approved by the Trust's Board of Trustees; and (6) the
                  securities may be acquired under the investment restrictions
                  applicable to the Portfolio.
                     Purchase and redemption orders may be placed by
                  telephone. Neither the Trust nor the Trust's transfer agent
                  will be responsible for any loss, liability, cost or expense
                  for acting upon wire instructions or upon telephone
                  instructions that it reasonably believes to be genuine. The
                  Trust and the Trust's transfer agent will each employ
                  reasonable procedures to confirm that instructions
                  communicated by telephone are genuine, including requiring a
                  form of personal identification prior to acting upon
                  instructions received by telephone and recording telephone
                  instructions.
                     
                     If market conditions are extraordinarily active, or other
                  extraordinary circumstances exist, Shareholders may
                  experience difficulties placing redemption orders by
                  telephone, and may wish to consider placing orders by other
                  means.     
 
PERFORMANCE ____________________________________________________________________
                     
                  From time to time, the Portfolio may advertise yield and
                  total return. These figures will be based on historical
                  earnings and are not intended to indicate future
                  performance. No representation can be made concerning actual
                  future yields or returns. The yield of a Portfolio refers to
                  the income generated by a hypothetical investment in the
                  Portfolio over a thirty day period. This income is then
                  "annualized," i.e., the income over thirty days is assumed
                  to be generated over one year and is shown as a percentage
                  of the investment.     
                     
                     The total return of the Portfolio refers to the average
                  compounded rate of return on a hypothetical investment for
                  designated time periods, assuming that the entire investment
                  is redeemed at the end of each period and assuming the
                  reinvestment of all dividend and capital gain distributions.
                         
                     The Portfolio may periodically compare its performance to
                  the performance of: other mutual funds tracked by mutual
                  fund rating services (such as Lipper Analytical); financial
                  and business publications and periodicals; broad groups of
                  comparable mutual     
 
                                                                    11
<PAGE>
 
                     
                  funds; unmanaged indices which may assume investment of
                  dividends but generally do not reflect deductions for
                  administrative and management costs; or to other investment
                  alternatives. The Portfolio may quote Morningstar, Inc., a
                  service that ranks mutual funds on the basis of risk-
                  adjusted performance. The Portfolio may use long-term
                  performance of these capital markets to demonstrate general
                  long-term risk versus reward scenarios and could include the
                  value of a hypothetical investment in any of the capital
                  markets. The Portfolio may also quote financial and business
                  publications and periodicals as they relate to fund
                  management, investment philosophy and investment techniques.
                         
                     The Portfolio may quote various measures of volatility
                  and benchmark correlation in advertising and may compare
                  these measures to those of other funds. Measures of
                  volatility attempt to compare historical share price
                  fluctuations or total returns to a benchmark while measures
                  of benchmark correlation indicate how valid a comparative
                  benchmark might be. Measures of volatility and correlation
                  are calculated using averages of historical data and cannot
                  be calculated precisely.     
                     
                     The performance on Class A shares will normally be higher
                  than that on the Class E shares of the Portfolio because of
                  the additional distribution expenses charged to Class E
                  shares.     
 
TAXES __________________________________________________________________________
                     
                  The following summary of federal income tax consequences is
                  based on current tax laws and regulations, which may be
                  changed by legislative, judicial or administrative action.
                  No attempt has been made to present a detailed explanation
                  of the federal, state or local income tax treatment of the
                  Portfolio or its shareholders. Accordingly, shareholders are
                  urged to consult their tax advisers regarding specific
                  questions as to federal, state and local taxes. State and
                  local tax consequences of an investment in the Portfolio may
                  differ from the federal income tax consequences described
                  below. Additional information concerning taxes is set forth
                  in the Statement of Additional Information.     
                  
Tax Status of     The Portfolio is treated as a separate entity for federal
the Portfolio     income tax purposes and is not combined with the Trust's
                  other portfolios. The Portfolio intends to qualify for the
                  special tax treatment afforded regulated investment
                  companies ("RICs") under Subchapter M of the Code, so as to
                  be relieved of federal income tax on net investment company
                  taxable income and net capital gains (the excess of net
                  long-term capital gain over net short-term capital losses)
                  distributed to shareholders.     
                     
Tax Status of     The Portfolio distributes substantially all of its net
Distributions     investment income (including net short-term capital gains)
                  to shareholders. Dividends from the Portfolio's net
                  investment income are taxable to its shareholders as
                  ordinary income (whether received in cash or in additional
                  shares) and will not qualify for the deduction for the
                  corporate dividends-received deduction. Distributions of net
                  capital gains are taxable to shareholders as long-term
                  capital gains. The Portfolio provides annual reports to
                  shareholders of the federal income tax status of all
                  distributions.     
 
                                                                    12
<PAGE>
 
                     
                     Dividends declared by the Portfolio in October, November
                  or December of any year and payable to shareholders of
                  record on a date in such a month will be deemed to have been
                  paid by the Portfolio and received by the Shareholders on
                  December 31 of the year declared if paid by the Portfolio at
                  any time during the following January.     
                     
                     The Portfolio intends to make sufficient distributions to
                  avoid liability for the federal excise tax.     
                     
                     Investment income received by the Portfolio from sources
                  within foreign countries may be subject to foreign income
                  taxes withheld at the source. To the extent that the
                  Portfolio is liable for foreign income taxes so withheld,
                  the Portfolio intends to operate so as to meet the
                  requirements of the Code to pass through to the shareholders
                  credit for foreign income taxes paid. Although the Portfolio
                  intends to meet Code requirements to pass through credit for
                  such taxes, there can be no assurance that the Portfolio
                  will be able to do so.     
                     Sale, exchange or redemption of Portfolio shares is a
                  taxable transaction to the shareholder.
 
GENERAL 
INFORMATION ____________________________________________________________________
                     
The Trust         The Trust was organized as a Massachusetts business trust
                  under a Declaration of Trust dated March 6, 1985. The
                  Declaration of Trust permits the Trust to offer separate
                  series of shares and different classes of each portfolio. In
                  addition to the Portfolio, the Trust consists of the Bond
                  Index Portfolio. All consideration received by the Trust for
                  shares of any class of any portfolio and all assets of such
                  portfolio or class belong to that portfolio or class,
                  respectively, and would be subject to the liabilities
                  related thereto.     

                     The Trust pays its expenses, including fees of its
                  service providers, audit and legal expenses, expenses of
                  preparing prospectuses, proxy solicitation materials and
                  reports to shareholders, costs of custodial services and
                  registering the shares under federal and state securities
                  laws, pricing, insurance expenses, litigation and other
                  extraordinary expenses, brokerage costs, interest charges,
                  taxes and organization expenses.

Trustees of the   The management and affairs of the Trust are supervised by
Trust             the Trustees under the laws of the Commonwealth of
                  Massachusetts. The Trustees have approved contracts under
                  which, as described above, certain companies provide
                  essential management services to the Trust.

Voting Rights     Each share held entitles the shareholder of record to one
                  vote. The shareholders of each Portfolio or class will vote
                  separately on matters pertaining solely to that Portfolio or
                  class, such as any distribution plan. As a Massachusetts
                  business trust, the Trust is not required to hold annual
                  meetings of shareholders but approval will be sought for
                  certain changes in the operation of the Trust and for the
                  election of Trustees under certain circumstances. In
                  addition, a Trustee may be removed by the remaining Trustees
                  or by shareholders at a special meeting called upon written
                  request of shareholders owning at
 
                                                                    13
<PAGE>
 
                  least 10% of the outstanding shares of the Trust. In the
                  event that such a meeting is requested, the Trust will
                  provide appropriate assistance and information to the
                  shareholders requesting the meeting.
                     
Reporting         The Trust issues unaudited financial statements semi-
                  annually and audited financial statements annually. The
                  Trust furnishes proxy statements and other reports to
                  shareholders of record.     

Shareholder       Shareholder inquiries should be directed to the Manager, SEI
Inquiries         Financial Management Corporation, 680 East Swedesford Road,
                  Wayne, PA 19087.
                     
Dividends         Substantially all of the net investment income (exclusive of
                  capital gains) of the Portfolio is periodically declared and
                  paid as a dividend. Dividends are paid currently on a
                  quarterly basis. Currently, net capital gains (the excess of
                  net long-term capital gain over net short-term capital loss)
                  realized, if any, will be distributed at least annually.
                      
                     Shareholders automatically receive all income dividends
                  and capital gain distributions in additional shares at the
                  net asset value next determined following the record date,
                  unless the shareholder has elected to take such payment in
                  cash. Shareholders may change their election by providing
                  written notice to the Manager at least 15 days prior to the
                  distribution.
                     
                     Dividends and capital gains of the Portfolio are paid on
                  a per-share basis. The value of each share will be reduced
                  by the amount of any such payment. If shares are purchased
                  shortly before the record date for a dividend or capital
                  gains distributions, a shareholder will pay the full price
                  for the share and receive some portion of the price back as
                  a taxable dividend or distribution.     
                     
                     The dividends on Class A shares of the Portfolio are
                  normally higher than those on the Class E shares because of
                  the additional distribution expenses charged to Class E
                  shares.     
                     
Counsel and       Morgan, Lewis & Bockius LLP serves as counsel to the Trust.
Independent       Arthur Andersen LLP serves as the independent public
Accountants       accountants of the Trust.     
                     
Custodian and     Comerica Bank acts as custodian of the Trust's assets. The
Wire Agent        Custodian holds cash, securities and other assets of the
                  Trust as required by the Investment Company Act of 1940, as
                  amended (the "1940 Act"). CoreStates Bank, N.A., Broad and
                  Chestnut Streets, P.O. Box 7618, Philadelphia, PA 19101 acts
                  as wire agent of the Trust's assets.     
 
                                                                    14
<PAGE>
 
DESCRIPTION OF 
PERMITTED 
INVESTMENTS AND 
RISK FACTORS   _________________________________________________________________
                     
                  The following is a description of the permitted investment
                  practices for the Portfolio, and the associated risk
                  factors:     

Bankers'          Bankers' acceptances are bills of exchange or time drafts
Acceptances       drawn on and accepted by a commercial bank. Bankers'
                  acceptances are used by corporations to finance the shipment
                  and storage of goods and to furnish dollar exchange.
                  Maturities are generally six months or less.

Certificates of   Certificates of deposit are interest bearing instruments
Deposit           with a specific maturity. They are issued by banks and
                  savings and loan institutions in exchange for the deposit of
                  funds and normally can be traded in the secondary market
                  prior to maturity. Certificates of deposit have penalties
                  for early withdrawal.

Commercial        Commercial paper is a term used to describe unsecured short-
Paper             term promissory notes issued by banks, municipalities,
                  corporations and other entities. Maturities on these issues
                  vary from a few to 270 days.

Equity            Investments in equity securities in general are subject to
Securities        market risks that may cause their prices to fluctuate over
                  time. The value of convertible equity securities is also
                  affected by prevailing interest rates, the credit quality of
                  the issuer and any call provision. Fluctuations in the value
                  of equity securities in which the Portfolio invests will
                  cause the net asset value of the Portfolio to fluctuate.
                     
Illiquid          Illiquid securities are securities which cannot be disposed
Securities        of within seven business days at approximately the price at
                  which they are being carried on the Trust's books. An
                  illiquid security includes a demand instrument with a demand
                  notice period exceeding seven days, where there is no
                  secondary market for such security and repurchase agreements
                  with durations (or maturities) over 7 days in length.     
                     
Repurchase        Repurchase agreements are agreements by which the Portfolio
Agreements        obtains a security and simultaneously commits to return the
                  security to the seller at an agreed-upon price on an agreed-
                  upon date. The Custodian will hold the security as
                  collateral for the repurchase agreement. The Portfolio bears
                  a risk of loss in the event the other party defaults on its
                  obligations and the Portfolio is delayed or prevented from
                  its right to dispose of the collateral or if the Portfolio
                  realizes a loss on the sale of the collateral. The Portfolio
                  will enter into repurchase agreements only with financial
                  institutions deemed to present minimal risk of bankruptcy
                  during the term of the agreement based on established
                  guidelines. Repurchase agreements are considered loans under
                  the 1940 Act.     

Securities of     There are certain risks connected with investing in foreign
Foreign Issuers   securities. These include risks of adverse political and
                  economic developments (including possible governmental
                  seizure or
 
                                                                    15
<PAGE>
 
                  nationalization of assets), the possible imposition of
                  exchange controls or other governmental restrictions, less
                  uniformity in accounting and reporting requirements, the
                  possibility that there will be less information on such
                  securities and their issuers available to the public, the
                  difficulty of obtaining or enforcing court judgments abroad,
                  restrictions on foreign investments in other jurisdictions,
                  difficulties in effecting repatriation of capital invested
                  abroad, and difficulties in transaction settlements and the
                  effect of delay on shareholder equity. Foreign securities
                  may be subject to foreign taxes, and may be less marketable
                  than comparable U.S. securities. The value of a Fund's
                  investments denominated in foreign currencies will depend on
                  the relative strengths of those currencies and the U.S.
                  dollar, and a Fund may be affected favorably or unfavorably
                  by changes in the exchange rates or exchange control
                  regulations between foreign currencies and the U.S. dollars.
                  Changes in foreign currency exchange rates also may affect
                  the value of dividends and interest earned, gains and losses
                  realized on the sale of securities and net investment income
                  and gains, if any, to be distributed to shareholders by a
                  Fund.
Stock Index       A stock index futures contract is a bilateral agreement
Futures           pursuant to which two parties agree to take or make delivery
                  of an amount of cash equal to a specified dollar amount
                  times the difference between the stock index value at the
                  close of trading of the contract and the price at which the
                  futures contract is originally struck. No physical delivery
                  of the stocks comprising the Index is made; generally
                  contracts are closed out prior to the expiration date of the
                  contract. No price is paid upon entering into futures
                  contracts. Instead, a Portfolio would be required to deposit
                  an amount of cash or U.S. Treasury securities known as
                  "initial margin." Subsequent payments, call "variation
                  margin," to and from the broker, would be made on a daily
                  basis as the value of the futures position varies (a process
                  known as "marking to market"). The margin is in the nature
                  of a performance bond or good-faith deposit on a futures
                  contract.
                     In order to avoid leveraging and related risks, when a
                  Portfolio purchases futures contracts, it will collateralize
                  its position by depositing an amount of cash or cash
                  equivalents, equal to the market value of the futures
                  positions held, less margin deposits, in a segregated
                  account with the Trust's custodian. Collateral equal to the
                  current market value of the futures position will be marked
                  to market on a daily basis.
                     In considering the proposed use of futures contracts,
                  particular note should be taken that futures contracts
                  relate to the anticipated levels at some point in the
                  future, not to the current level of the underlying
                  instrument. Thus trading of stock index futures may not
                  reflect the trading of the securities which are used to
                  formulate an index or even actual fluctuations in the
                  relevant index itself. There is, in addition, a risk that
                  movements in the price of futures contracts will not
                  correlate with the movement in prices of the stock index
                  being tracked.
Time Deposits     Time deposits are non-negotiable receipts issued by a bank
                  in exchange for the deposit of funds. Like a certificate of
                  deposit, a time deposit earns a specified rate of interest
                  over a
 
                                                                    16
<PAGE>
 
                  definite period of time; however, it cannot be traded in the
                  secondary market. Time deposits are considered to be
                  illiquid securities.

U.S. Government   Obligations issued or guaranteed by agencies of the United
Agencies          States Government including, among others, the Federal Farm
                  Credit Bank, the Federal Housing Administration, and the
                  Small Business Administration and obligations issued or
                  guaranteed by instrumentalities of the United States
                  Government including, among others, the Federal Home Loan
                  Mortgage Corporation, the Federal Land Banks, and the U.S.
                  Postal Service. Some of these securities are supported by
                  the full faith and credit of the U.S. Treasury (e.g.,
                  Government National Mortgage Association), and others are
                  supported by the right of the issuer to borrow from the
                  Treasury (e.g., Federal Farm Credit Bank), and still others
                  are supported only by the credit of the instrumentality
                  (e.g., Federal National Mortgage Association). Guarantees of
                  principal by agencies or instrumentalities of the United
                  States Government may be a guarantee of payment at the
                  maturity of the obligation so that in the event of a default
                  prior to maturity there might not be a market and thus no
                  means of realizing on the obligation prior to maturity.
                  Guarantees as to the timely payment of principal and
                  interest do not extend to the value or yield of these
                  securities nor to the value of the Portfolios' shares.

Warrants          Warrants are instruments giving holders the right, but not
                  the obligation, to buy shares of a company at a given price
                  during a specified period.
                     
When-Issued and   When-issued or delayed delivery basis transactions involve
Delayed           the purchase of an instrument with payment and delivery
Delivery          taking place in the future. Delivery of and payment for
Securities        these securities may occur a month or more after the date of
                  the purchase commitment. The Portfolio will maintain with
                  the custodian a separate account with liquid, high grade
                  debt securities or cash in an amount at least equal to these
                  commitments. The interest rate realized on these securities
                  is fixed as of the purchase date, and no interest accrues to
                  the Portfolio before settlement. These securities are
                  subject to market fluctuation due to changes in market
                  interest rates, and it is possible that the market value at
                  the time of settlement could be higher or lower than the
                  purchase price if the general level of interest rates has
                  changed. Although the Portfolio generally purchases
                  securities on a when-issued or forward commitment basis with
                  the intention of actually acquiring securities for its
                  portfolio, the Portfolio may dispose of a when-issued
                  security or forward commitment prior to settlement if it
                  deems appropriate.     

                     Additional information on other permitted investments can
                  be found in the Statement of Additional Information.
 
                                                                    17
<PAGE>
 
TABLE OF CONTENTS
- --------------------------------------------------------------------------------
<TABLE>   
<S>                                    <C>
Annual Operating Expenses............   2
Financial Highlights.................   3
The Trust............................   4
Investment Objectives and Policies...   4
General Investment Policies..........   6
Investment Limitations...............   6
The Manager & Shareholder Servicing
Agent................................   7
The Adviser..........................   8
Distribution.........................   8
Purchase & Redemption of Shares......   9
Performance..........................  11
Taxes................................  12
General Information..................  13
Description of Permitted Investments
and Risk Factors.....................  15
</TABLE>    
<PAGE>

 
                                 SEI INDEX FUND
                            
                        Post-Effective Amendment No. 18      
                           PART C:  OTHER INFORMATION

ITEM 24.  FINANCIAL STATEMENTS AND EXHIBITS:

(a)  Financial Statements

    
   Part A:
      Financial Highlights

   Part B:  The following financial statements are incorporated by reference to
   Post-Effective Amendment No. 17.     
      Report dated May 12, 1995 of Independent Public Accountants on financial
      statements as of March 31, 1995.
      Statements of Net Assets, as of March 31, 1995.
      Statements of Operations for the year ended March 31, 1995.
      Statements of Changes in Net Assets for the years ended March 31, 1995,
      1994 and 1993.
      Financial Highlights for the years ended March 31, 1995, 1994, 1993, 1992,
      and 1991.
      Notes to Financial Statements.

      All required financial statements are included in Parts A or B hereof.
      All other financial statements and schedules are inapplicable.

(b)  Additional Exhibits

      (1)     Declaration of Trust (1)
      (2)     By-Laws (1)
      (3)     Not Applicable
      (4)     Not Applicable
      (5)(a)  Management Agreement with SEI Financial Management Corporation (2)
      (5)(b)  Investment Administrator Agreement with Manufacturers National
              Bank of Detroit (3)
      (5)(c)  Investment Administration Agreement with Woodbridge Capital
              Management, Inc. (5)
      (5)(d)  Investment Advisory Agreement with World Asset Management (6)
          
      (6)(a)  Distribution Agreement with SEI Financial Services Company (2)
           
          
      (6)(b)  Form of Amended and Restated Distribution Agreement with SEI 
              Financial Services Company *      
      (7)     Not Applicable
      (8)(a)  Custodian Agreement with Manufacturers National Bank of
              Detroit (2)
      (8)(b)  Custodian Agreement with Comerica Bank
      (9)     Not Applicable
      (10)    Opinion and Consent of Counsel (4)
      (11)    Consent of Independent Public Accountants *
      (12)    Not Applicable
      (13)    Not Applicable
      (14)    Not Applicable
          
      (15)(a) Distribution Plan with SEI Financial Services Company (4)      
          
      (15)(b) Form of Distribution Plan - Class E *      
      (16)    Performance Quotation Computation (5)
      (17)    Powers of Attorney (6)
         
      (18)    Rule 18f-3 Plan*      
   ________________________
   *     Filed herewith.

   (1)   Incorporated by reference to Registrant's Registration Statement on
         Form N-1A (File No. 2-97111) filed with the Securities and Exchange
         Commission on April 17, 1985.
   (2)   Incorporated by reference to Pre-Effective Amendment No. 2 to
         Registrant's Registration Statement on

                                      C-1
<PAGE>
 
         Form N-1A (File No. 2-97111) filed with the Securities and Exchange
         Commission on July 12, 1985.
   (3)   Incorporated by reference to Post Effective Amendment No. 12 to
         Registrant's Registration Statement on Form N-1A (File No. 2-97111)
         filed with the Securities and Exchange Commission on July 11, 1990.
   (4)   Incorporated by reference to Pre-Effective Amendment No. 1 to
         Registrant's Registration Statement on Form N-1A (File No. 2-97111)
         filed with the Securities and Exchange Commission on June 14, 1985.
   (5)   Incorporated by reference to Post-Effective Amendment No. 15 to
         Registrant's Registration Statement on Form N-1A (File No. 2-97111)
         filed with the Securities and Exchange Commission on July 29, 1993.
    
   (6)   Incorporated by reference to Post-Effective Amendment No. 17 to
         Registrant's Registration Statement on Form N-1A (File No. 2-97111)
         filed with the Securities and Exchange Commission on May 31, 1995.     

ITEM 25.  PERSONS CONTROLLED BY OR UNDER COMMON CONTROL WITH REGISTRANT:

   See the Prospectuses and Statement of Additional Information filed herewith
regarding the Trust's control relationships.  The Manager is a subsidiary of SEI
Corporation which also controls the distributor of the Registrant, SEI Financial
Services Company, and other corporations engaged in providing various financial
and record keeping services, primarily to bank trust departments, pension plan
sponsors, and investment managers.

ITEM 26.  NUMBER OF HOLDERS OF SECURITIES:

    As of December 1, 1995:     
                                               Number of
       Title of Class                         Record Holders

Units of beneficial interest, without par value-

    S&P 500 Index Portfolio Class A                196
    Bond Index Portfolio                            58     

ITEM 27.  INDEMNIFICATION:

  Article VIII of the Agreement and Declaration of Trust filed as Exhibit 1 to
the Registration Statement dated April 17, 1985 is incorporated by reference.
Insofar as indemnification for liabilities arising under the Securities Act of
1933 may be permitted to trustees, directors, officers and controlling persons
of the Registrant by the Registrant pursuant to the Declaration of Trust or
otherwise, the Registrant is aware that in the opinion of the Securities and
Exchange Commission, such indemnification is against public policy as expressed
in the Act and, therefore, is 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 trustees, directors, officers or
controlling persons of the Registrant in connection with the successful defense
of any act, suit or proceeding) is asserted by such trustees, directors,
officers or controlling persons in connection with the shares 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 Act and will be governed by the final adjudication of such
issues.

                                      C-2
<PAGE>
 
ITEM 28.  BUSINESS AND OTHER CONNECTIONS OF INVESTMENT ADVISER:

    
  The list required by this Item 28 of officers and directors of World Asset
Management, together with information as to any other business, profession,
vocation or employment of a substantital nature engaged in by such officers and
directors during the past two years, is incorporated by reference to Schedules A
and D of Form ADV, filed by World Asset Management pursuant to the Investment
Advisers Act of 1940 (SEC File No. 801-48470).     



ITEM 29.  PRINCIPAL UNDERWRITERS:

(a) Furnish the name of each investment company (other than the Registrant) for
    which each principal underwriter currently distributing the securities of
    the Registrant also acts as a principal underwriter, distributor or
    investment adviser.

    Registrant's distributor, SEI Financial Services Company ("SFS"), acts as
    distributor for:

    
<TABLE>
<CAPTION>

<S>                                        <C> 
  SEI Daily Income Trust                   July 15, 1982
  SEI Liquid Asset Trust                   November 29, 1982
  SEI Tax Exempt Trust                     December 3, 1982
  SEI Index Funds                          July 10, 1985
  SEI Institutional Managed Trust          January 22, 1987
  SEI International Trust                  August 30, 1988
  Stepstone Funds                          January 30, 1991
  The Compass Capital Group                March 8, 1991
  FFB Lexicon Funds                        October 18, 1991
  The Advisors' Inner Circle Fund          November 14, 1991
  The Pillar Funds                         February 28, 1992
  CUFUND                                   May 1, 1992
  STI Classic Funds                        May 29, 1992
  CoreFunds, Inc.                          October 30, 1992
  First American Funds, Inc.               November 1, 1992
  First American Investment Funds, Inc.    November 1, 1992
  The Arbor Fund                           January 28, 1993
  1784 Funds                               June 1, 1993
  The PBHG Funds, Inc.                     July 16, 1993
  Marquis Funds/(R)/                       August 17, 1993
  Morgan Grenfell Investment Trust         January 3, 1994
  Inventor Funds, Inc.                     August 1, 1994
  The Achievement Funds Trust              December 27, 1994
  Insurance Investment Products Trust      December 30, 1994
  Bishop Street Funds                      January 27, 1995
  CrestFunds, Inc.                         March 1, 1995
  Conestoga Family of Funds                May 1, 1995
  STI Classic Variable Trust               August 18, 1995
  ARK Funds                                November 1, 1995
</TABLE>     

  SFS provides numerous financial services to investment managers, pension plan
  sponsors, and bank trust departments.  These services include portfolio
  evaluation, performance measurement and consulting services ("Funds
  Evaluation") and automated execution, clearing and settlement of securities
  transactions ("MarketLink").

                                      C-3
<PAGE>
 
    
(b) Furnish the Information required by the following table with respect to each
    director, officer or partner of each principal underwriter named in the
    answer to Item 21 of Part B.  Unless otherwise noted, the business address
    of each director or officer is 680 East Swedesford Road, Wayne, PA 
    19087.     


<TABLE>    
<CAPTION>
 
                                        Position and Office                  Positions and Offices
Name                                     with Underwriter                       with Registrant
- ----------------------  ---------------------------------------------------  ---------------------
<S>                     <C>                                                  <C>
 
Alfred P. West, Jr.     Director, Chairman & Chief Executive Officer                            --
Henry H. Greer          Director, President & Chief Operating Officer                           --
Carmen V. Romeo         Director, Executive Vice President & Treasurer                          --
Gilbert L. Beebower     Executive Vice President                                                --
Richard B. Lieb         Executive Vice President                                                --
Charles A. Marsh        Executive Vice President-Capital Resources Division                     --
Leo J. Dolan, Jr.       Senior Vice President                                                   --
Carl A. Guarino         Senior Vice President                                                   --
Jerome Hickey           Senior Vice President                                                   --
David G. Lee            Senior Vice President                                      President
William Madden          Senior Vice President                                                   --
A. Keith McDowell       Senior Vice President                                                   --
Dennis J. McGonigle     Senior Vice President                                                   --
Hartland J. McKeown     Senior Vice President                                                   --
James V. Morris         Senior Vice President                                                   --
Steven Onofrio          Senior Vice President                                                   --
Kevin P. Robins         Senior Vice President, General Counsel &  Secretary                     --
Robert Wagner           Senior Vice President                                                   --
Patrick K. Walsh        Senior Vice President                                                   --
Kenneth Zimmer          Senior Vice President                                                   --
Robert Crudup           Managing Director                                                       --
Vic Galef               Managing Director                                                       --
Kim Kirk                Managing Director                                                       --
John Krzeminski         Managing Director                                                       --
Carolyn McLaurin        Managing Director & Vice President                                      --
Barbara Moore           Managing Director                                                       --
Donald Pepin            Managing Director                                                       --
Mark Samuels            Managing Director                                                       --
Wayne M. Withrow        Managing Director                                                       --
Mick Duncan             Team Leader                                                             --
Robert S. Ludwig        Team Leader & Vice President                                            --
Vicki Malloy            Team Leader                                                             --
Robert Aller            Vice President                                                          --
Steve Bendinelli        Vice President                                                          --
Cris Brookmyer          Vice President & Controller                                             --
Gordon W. Carpenter     Vice President                                                          --
Robert B. Carroll       Vice President & Assistant Secretary                                    --
Todd Cipperman          Vice President & Assistant Secretary
Ed Daly                 Vice President                                                          --
Jeff Drennen            Vice President                                                          --
Lucinda Duncalfe        Vice President                                                          --
Kathy Heilig            Vice President                                                          --
Larry Hutchison         Vice President                                                          --
Michael Kantor          Vice President                                                          --
</TABLE>      

                                      C-4
<PAGE>
 
<TABLE>    
<CAPTION>
 
                                        Position and Office                  Positions and Offices
Name                                     with Underwriter                       with Registrant
- ----------------------  ---------------------------------------------------  ---------------------
<S>                     <C>                                                  <C>
Samuel King             Vice President                                                          --
Donald H. Korytowski    Vice President                                                          --
Jack May                Vice President                                                          --
Sandra K. Orlow         Vice President & Assistant Secretary                                    --
Larry Pokora            Vice President                                                          --
Kim Rainey              Vice President                                                          --
Paul Sachs              Vice President                                                          --
Steve Smith             Vice President                                                          --
Daniel Spaventa         Vice President                                                          --
Kathryn L. Stanton      Vice President & Assistant Secretary                                    --
William Zawaski         Vice President                                                          --
James Dougherty         Director of Brokerage Services                                          --
</TABLE>     

ITEM 30.  LOCATION OF ACCOUNTS AND RECORDS:

  Books or other documents required to be maintained by Section 31(a) of the
Investment Company Act of 1940, and the rules promulgated thereunder, are
maintained as follows:

  (a) With respect to Rules 31a-1(a); 31a-1(b)(1); (2)(a) and (b); (3); (6);
      (8); (12); and 31a-1(d), the required books and records are maintained at
      the offices of Registrant's Custodian for those portfolios:

       Comerica Bank
       411 W. Lafayette
       Detroit, MI 48226

  (b) With respect to Rules 31a-1(a); 31a-1(b)(1), (2)(C) and (D); (4); (5);
      (6); (8); (9); (10); (11); and 31a-1(f), the required books and records
      are maintained at the offices of Registrant's Manager:

       SEI Financial Management Corporation
       680 E. Swedesford Road
       Wayne, PA 19087

    
  (c) With respect to Rules 31a-1(b)(5), (6), (9) and (10) and 31a-1(f), the
      required books and records are maintained at the principal offices of the
      Registrant's Adviser for those portfolios:

     S&P 500 Index Portfolio     Bond Index Portfolio
       World Asset Management        Mellon Bond Associates
       100 Renaissance Center        One Mellon Bank, Suite 4135
       Detroit, MI 48243           Pittsburgh, PA  15258     
 
ITEM 31.  MANAGEMENT SERVICES:

  None.

ITEM 32.  UNDERTAKINGS:

  Registrant undertakes to call a meeting of Shareholders for the purpose of
voting upon the question of removal of a Trustee(s) when requested in writing to
do so by the holders of at least 10% of Registrant's outstanding shares and in
connection with such meetings to comply with the provisions of Section 16(c) of
the Investment Company Act of 1940 relating to Shareholder communications.

                                      C-5
<PAGE>
 
  Registrant undertakes to furnish each person to whom a prospectus is delivered
with a copy of the Registrant's latest annual report to shareholders, upon
request and without charge.


  Registrant hereby undertakes that whenever shareholders meeting the
requirements of Section 16(c) of the Investment Company Act of 1940 inform the
Board of Directors of their desire to communicate with Shareholders of the Fund,
the Directors will inform such Shareholders as to the approximate number of
Shareholders of record and the approximate costs of mailing or afford said
Shareholders access to a list of Shareholders.

                                      C-6
<PAGE>
 
                                     NOTICE

  A copy of the Agreement and Declaration of Trust of SEI Index Funds is on file
with the Secretary of State of the Commonwealth of Massachusetts and notice is
hereby given that this Registration Statement has been executed on behalf of the
Trust by an officer of the Trust as an officer and by its Trustees as trustees
and not individually and the obligations of or arising out of this Registration
Statement are not binding upon any of the Trustees, officers, or Shareholders
individually but are binding only upon the assets and property of the Trust.

                                      C-7
<PAGE>
 
                                   SIGNATURES

    
Pursuant to the requirements of the Securities Act of 1933 and the Investment
Company Act of 1940, the Registrant has duly caused this Post-Effective
Amendment to Registration Statement No. 2-97111 to be signed on its  behalf by
the undersigned, thereunto duly authorized, in the City of Wayne, Commonwealth
of Pennsylvania, on the 22nd day of December, 1995.     

                               SEI INDEX FUNDS

                               By:   /s/ David G. Lee
                                    -------------------------------------------
                                    David G. Lee
                                    President, Chief Executive Officer     
Attest:

 /s/ Jeffrey A. Cohen
- -------------------------------------------
     Jeffrey A. Cohen
     Controller, Chief Financial Officer     

Pursuant to the requirements of the Securities Act of 1933, this Amendment to
the Registration Statement has been signed below by the following persons in the
capacity and on the dates indicated.

<TABLE>    
<CAPTION>

<S>                        <C>                                  <C> 
          *                Trustee                              December 22, 1995
- -----------------------
Richard F.  Blanchard
 
          *                Trustee                              December 22, 1995
- -----------------------
William M.  Doran
 
          *                Trustee                              December 22, 1995
- -----------------------
F.  Wendell Gooch
 
          *                Trustee                              December 22, 1995
- -----------------------
Frank E.  Morris
 
          *                Trustee                              December 22, 1995
- -----------------------
James M. Storey
 
          *                Trustee                              December 22, 1995
- -----------------------
Robert A.  Nesher
 
 /s/ David G. Lee          President, Chief Executive Officer   December 22, 1995
- -----------------------
David G. Lee
 
 /s/ Jeffrey A. Cohen      Controller, Chief Financial Officer  December 22, 1995
- -----------------------
Jeffrey A. Cohen

</TABLE>     

         

* By:   /s/ David G. Lee
       ----------------------------
   David G. Lee
   Attorney-in-Fact
<PAGE>
 
                                 EXHIBIT INDEX

Exhibit No.                                               
- -----------                                               
<TABLE>    
<CAPTION>
 
<C>     <S>                                                                 
(1)     Declaration of Trust (1)                                            
(2)     By-Laws (1)                                                         
(3)     Not Applicable                                                      
(4)     Not Applicable                                                      
(5)(a)  Management Agreement with SEI Financial Management Company (2)      
(5)(b)  Investment Administrator Agreement with Manufacturers National Bank
        of Detroit (3)                                                      
(5)(c)  Investment Administration Agreement with Woodbridge Capital
        Management, Inc. (5)
(5)(d)  Investment Advisory Agreement with World Asset Management (6)
(6)(a)  Distribution Agreement with SEI Financial Services Company (2)
(6)(b)  Form of Amended and Restated Distribution Agreement with SEI Financial 
        Services Company
(7)     Not Applicable                                                      
(8)     Custodian Agreement with Manufacturers National Bank of Detroit (2) 
(9)     Not Applicable                                                      
(10)    Opinion and Consent of Counsel (4)                                  
(11)    CONSENT OF INDEPENDENT PUBLIC ACCOUNTANTS *
(12)    Not Applicable                                                      
(13)    Not Applicable                                                      
(14)    Not Applicable                                                      
(15)(a) Distribution Plan with SEI Financial Services Company (4)           
(15)(b) Form of Distribution Plan - Class E
(16)    Performance Quotation Computation (5)
(17)    Powers of Attorney (6)
(18)    RULE 18F-3 PLAN *
- ------------------------
 *      Filed herewith.
</TABLE>     
(1)    Incorporated by reference to Registrant's Registration Statement on Form
       N-1A (File No. 2-97111) filed with the Securities and Exchange Commission
       on April 17, 1985.
(2)    Incorporated by reference to Pre-Effective Amendment No. 2 to
       Registrant's Registration Statement on Form N-1A (File No. 2-97111) filed
       with the Securities and Exchange Commission on July 12, 1985.
(3)    Incorporated by reference to Post Effective Amendment No. 12 to
       Registrant's Registration Statement on Form N-1A (File No. 2-97111) filed
       with the Securities and Exchange Commission on July 11, 1990.
(4)    Incorporated by reference to Pre-Effective Amendment No. 1 to
       Registrant's Registration Statement on Form N-1A (File No. 2-97111) filed
       with the Securities and Exchange Commission on June 14, 1985.
(5)    Incorporated by reference to Post-Effective Amendment No. 15 to
       Registrant's Registration Statement on Form N-1A (File No. 2-97111) filed
       with the Securities and Exchange Commission on July 29, 1993.
    
(6)    Incorporated by reference to Post-Effective Amendment No. 17 to
       Registrant's Registration Statement on Form N-1A (File No. 2-97111) filed
       with the Securities and Exchange Commission on May 31, 1995.     

<PAGE>
 
                  AMENDED AND RESTATED DISTRIBUTION AGREEMENT
                                SEI INDEX FUNDS


        THIS AGREEMENT is made as of this 5th day of December, 1995 between SEI
Index Funds (the "Trust"), a Massachusetts business trust, and SEI Financial
Services Company (the "Distributor"), a Pennsylvania corporation.

        WHEREAS, the Trust is registered as an investment company with the
Securities and Exchange Commission (the "SEC") under the Investment Company Act
of 1940, as amended (the "1940 Act"), and its shares are registered with the SEC
under the Securities Act of 1933, as amended (the "1933 Act"); and

        WHEREAS, the Distributor is registered as a broker-dealer with the SEC
under the Securities Exchange Act of 1934, as amended;

        WHEREAS, the Trust and the Distributor are parties to that certain
Distribution Agreement dated July 10, 1985 (the "July Agreement");

        WHEREAS, the parties wish to amend and restate the terms of the July
Agreement as set forth herein.

        NOW, THEREFORE, in consideration of the mutual covenants hereinafter
contained, the Trust and the Distributor hereby agree as follows:

        ARTICLE 1. Sale of Shares. The Trust grants to the Distributor the
exclusive right to sell shares (the "Shares") of the portfolios (the
"Portfolios") of the Trust at the net asset value per Share, plus any applicable
sales charge in accordance with the Trust's current prospectuses, as agent and
on behalf of the Trust, during the term of this Agreement and subject to the
registration requirements of the 1933 Act, the rules and regulations of the SEC
and the laws governing the sale of securities in the various states (the "Blue
Sky Laws").

        ARTICLE 2. Solicitation of Sales. In consideration of these rights
granted to the Distributor, the Distributor agrees to use all reasonable
efforts, consistent with its other business, in connection with the distribution
of the Shares of the Trust; provided, however, that the Distributor shall not be
prevented from entering into like arrangements with other issuers. The
provisions of this paragraph do not obligate the Distributor to register as a
broker or dealer under the Blue Sky Laws of any jurisdiction when it determines
it would be uneconomical for it to do so or to maintain its registration in any
jurisdiction in which it is now registered nor obligate the Distributor to sell
any particular number of Shares.

        ARTICLE 3. Compensation. As compensation for providing the services
under this Agreement:

        (a) The Distributor shall receive from the Trust:

            (1) all distribution and service fees, as applicable, at the
            rate and under the terms and conditions set forth in each
            Distribution and Service Plan adopted by the appropriate class
            of Shares of each of the Portfolios, as such Plans may be
            amended from time to time, and subject to any further
            limitations on such fees as the Board of Trustees of the Trust
            may impose;

                                       6
<PAGE>
 
            (2) all contingent deferred sales charges ("CDSC") applied on
            redemptions of CDSC Class Shares, as applicable, of each
            Portfolio on the terms and subject to such waivers as are
            described in the Trust's Registration Statement and current
            prospectuses, as amended from time to time, or as otherwise
            required pursuant to applicable law; and
            
            (3) all front-end sales charges, as applicable, on purchases of
            front-end load Shares of each Portfolio sold subject to such
            charges as described in the Trust's Registration Statement and
            current prospectuses, as amended from time to time. The
            Distributor, or brokers, dealers and other financial
            institutions and intermediaries that have entered into sub-
            distribution agreements with the Distributor, may collect the
            gross proceeds derived from the sale of such front-end load
            Shares, remit the net asset value thereof to the Trust upon
            receipt of the proceeds and retain the applicable sales charge.

        (b) The Distributor may reallow any or all of the distribution or
        service fees, CDSC and front-end sales charges which it is paid by the
        Trust to such brokers, dealers and other financial institutions and
        intermediaries as the Distributor may from time to time determine.

        (c) The Distributor may transfer its right to the payments described in
        this Article 3 to third persons who provide funding to the Distributor,
        provided that any such transfer shall not be deemed a transfer of the
        Distributor's obligations under this Agreement. Upon receipt of
        direction from the Distributor to pay such fees to a transferee, the
        Trust shall make payment in accordance with such direction.

        ARTICLE 4. Authorized Representations. The Distributor is not authorized
by the Trust to give any information or to make any representations other than
those contained in the current registration statements and prospectuses of the
Trust filed with the SEC or contained in Shareholder reports or other material
that may be prepared by or on behalf of the Trust for the Distributor's use. The
Distributor may prepare and distribute sales literature and other material as it
may deem appropriate, provided that such literature and materials have been
prepared in accordance with applicable rules and regulations.

        ARTICLE 5. Registration of Shares. The Trust agrees that it will take
all action necessary to register Shares under the federal and state securities
laws so that there will be available for sale the number of Shares the
Distributor may reasonably be expected to sell and to pay all fees associated
with said registration. The Trust shall make available to the Distributor such
number of copies of its currently effective prospectuses and statement of
additional information as the Distributor may reasonably request. The Trust
shall furnish to the Distributor copies of all information, financial statements
and other papers which the Distributor may reasonably request for use in
connection with the distribution of Shares of the Trust.

        ARTICLE 6. Indemnification of Distributor. The Trust agrees to indemnify
and hold harmless the Distributor and each of its Trustees and officers and each
person, if any, who controls the Distributor within the meaning of Section 15 of
the 1933 Act against any loss, liability, claim, damages or expense (including
the reasonable cost of investigating or defending any alleged loss, liability,
claim, damages, or expense and reasonable counsel fees and disbursements
incurred in connection therewith), arising by reason of any person acquiring any
Shares, based upon the ground that the registration statement, prospectus,
Shareholder reports or other information filed or made public by the Trust (as
from time to time amended) included an untrue statement of a material tact or
omitted to state a material tact required to be stated or necessary in order to
make the statements made not misleading. However, the Trust does not agree to
indemnify the Distributor or hold it harmless to the extent that the statements
or omission was made in reliance upon, and in conformity with, information
tarnished to the Trust by or on behalf of the Distributor.

        In no case (i) is the indemnity of the Trust to be deemed to protect the
Distributor against any liability to the Trust or its Shareholders to which the
Distributor or such person otherwise would be subject by 

                                       7
<PAGE>
 
reason of willful misfeasance, bad faith or gross negligence in the performance
of its duties or by reason of its reckless disregard of its obligations and
duties under this Agreement, or (ii) is the Trust to be liable to the
Distributor under the indemnity agreement contained in this paragraph with
respect to any claim made against the Distributor or any person indemnified
unless the Distributor or other person shall have notified the Trust in writing
of the claim within a reasonable time alter the summons or other first written
notification giving information of the nature of the claim shall have been
served upon the Distributor or such other person (or alter the Distributor or
the person shall have received notice of service on any designated agent).
However, failure to notify the Trust of any claim shall not relieve the Trust
from any liability which it may have to the Distributor or any person against
whom such action is brought otherwise than on account of its indemnity agreement
contained in this paragraph.

        The Trust shall be entitled to participate at its own expense in the
defense or, if it so elects, to assume the defense of any suit brought to
enforce any claims subject to this indemnity provision.  If the Trust elects to
assume the defense of any such claim, the defense shall be conducted by counsel
chosen by the Trust and satisfactory to the indemnified defendants in the suit
whose approval shall not be unreasonably withheld. In the event that the Trust
elects to assume the defense of any suit and retain counsel, the identified
defendants shall bear the fees and expenses of any additional counsel retained
by them. If the Trust does not elect to assume the defense of a suit, it will
reimburse the indemnified defendants for the reasonable fees and expenses of any
counsel retained by the indemnified defendants.

        The Trust agrees to notify the Distributor promptly of the commencement
of any litigation or proceedings against it or any of its officers or Trustees
in connection with the issuance or sale of any of its Shares.

        ARTICLE 7. Indemnification of Trust. The Distributor covenants and
agrees that it will indemnity and hold harmless the Trust and each of its
Trustees and officers and each person, if any, who controls the Trust within the
meaning of Section 15 of the Act, against any loss, liability, damages, claim or
expense (including the reasonable cost of investigating or defending any alleged
loss, liability, damages, claim or expense and reasonable counsel fees incurred
in connection therewith) based upon the 1933 Act or any other statute or common
law and arising by reason of any person acquiring any Shares, and alleging a
wrongful act of the Distributor or any of its employees or alleging that the
registration statement, prospectus, Shareholder reports or other information
filed or made public by the Trust (a- from time to time amended) included an
untrue statement of a material tact or omitted to state a material tact required
to be stated or necessary in order to make the statements not misleading,
insofar as the statement or omission was made in reliance upon and in conformity
with information furnished to the Trust by or on behalf of the Distributor.

        In no case (i) is the indemnity of the Distributor in favor of the Trust
or any other person indemnified to be deemed to protect the Trust or any other
person against any liability to which the Trust or such other person would
otherwise be subject by reason of willful misfeasance, bad faith or gross
negligence in the performance of its duties or by reason of its reckless
disregard of its obligations and duties under this Agreement, or (ii) is the
Distributor to be liable under its indemnity agreement contained in this
paragraph with respect to any claim made against the Trust or any person
indemnified unless the Trust or person, as the case may be, shall have notified
the Distributor in writing of the claim within a reasonable time alter the
summons or other first written notification giving information of the nature of
the claim shall have been served upon the Trust or upon any person (or after the
Trust or such person shall have received notice of service on any designated
agent). However, failure to notify the Distributor of any claim shall not
relieve the Distributor from any liability which ft may have to the Trust or any
person against whom the action is brought otherwise than on account of its
indemnity agreement contained in this paragraph.

        The Distributor shall be entitled to participate, at its own expense, in
the defense or, if it so elects, to assume the defense of any suit brought to
enforce the claim, but if the Distributor elects to assume the defense, the
defense shall be conducted by counsel chosen by the Distributor and satisfactory
to the indemnified defendants whose approval shall not be unreasonably withheld.
In the event that the Distributor elects to assume the defense of any suit and
retain counsel, the defendants in the suit shall bear the fees and expenses of
any additional counsel retained by them. If the Distributor does not elect to
assume the defense 

                                       8
<PAGE>
 
of any suit, it will reimburse the indemnified defendants in the suit for the
reasonable fees and expenses of any counsel retained by them.

        The Distributor agrees to notify the Trust promptly of the commencement
of any litigation or proceedings against it in connection with the issue and
sale of any of the Trust's Shares.

        ARTICLE 8. Effective Date. This Agreement shall be effective upon its
execution, and unless terminated as provided, shall continue in force for one
year from the effective date and thereafter from year to year, provided that
such annual continuance is approved by (i) either the vote of a majority of the
Trustees of the Trust, or the vote of a majority of the outstanding voting
securities of the Trust, and (ii) the vote of a majority of those Trustees of
the Trust who are not parties to this Agreement or the Trust's Distribution Plan
or interested persons of any such party ("Qualified Trustees"), cast in person
at a meeting called for the purpose of voting on the approval.  This Agreement
shall automatically terminate in the event of its assignment. As used in this
paragraph the terms "vote of a majority of the outstanding voting securities",
"assignment" and "interested person" shall have the respective meanings
specified in the 1940 Act. In addition, this Agreement may at any time be
terminated without penalty by the Distributor, by a vote of a majority of
Qualified Trustees or by vote of a majority of the outstanding voting securities
of the Trust upon not less than sixty days prior written notice to the other
party.

        ARTICLE 9. Notices. Any notice required or permitted to be given by
either party to the other shall be deemed sufficient if sent by registered or
certified mail, postage prepaid, addressed by the party giving notice to the
other party at the last address furnished by the other party to the party giving
notice: if to the Trust, at 680 East Swedesford Road, Wayne, Pennsylvania, and
if to the Distributor, at 680 East Swedesford Road, Wayne, Pennsylvania 19087.
    
        ARTICLE 10. Limitation of Liability. A copy of the Declaration of Trust
of the Trust is on file with the Secretary of State of Massachusetts, and notice
is hereby given that this Agreement is executed on behalf of the Trustees of the
Trust as Trustees and not individually and that the obligations of this
instrument are not binding upon any of the Trustees, officers or shareholders of
the Trust individually but binding only upon the assets and property of the
Trust.      

        ARTICLE 11. Governing Law. This Agreement shall be construed in
accordance with the laws of the state of Massachusetts and the applicable
provisions of the 1940 Act. To the extent that the applicable laws of the state
of Massachusetts, or any of the provisions herein, conflict with the applicable
provisions of the 1940 Act, the latter shall control.

        ARTICLE 12. Multiple Originals. This Agreement may be executed in two or
more counterparts, each of which when so executed shall be deemed to be an
original, but such counterparts shall together constitute but one and the same
instrument.

        IN WITNESS, the Trust and Distributor have each duly executed this
Agreement, as of the day and year above written.


                                               SEI INDEX FUNDS


                                               By:________________________


                                               Attest:____________________



                                               SEI FINANCIAL SERVICES 

                                       9
<PAGE>
 
                                               COMPANY


                                               By:_________________________


                                               Attest:_____________________

                                       10

<PAGE>
 
                               DISTRIBUTION PLAN
                                SEI INDEX FUNDS
                                        
                                    CLASS E      


       WHEREAS, SEI Index Funds (the "Trust") is engaged in business as an open-
end investment company registered under the Investment Company Act of 1940, as
amended ("1940 Act"); and
    
       WHEREAS, the Trustees of the Trust have determined that there is a
reasonable likelihood that the following Distribution Plan will benefit the
Portfolios of the Trust listed on Exhibit A hereto (the "Portfolios") and the
owners of the Class E of shares of such Portfolios (the "Shares");      

       NOW, THEREFORE, the Trustees of the Trust hereby adopt this Distribution
Plan pursuant to Rule 12b-1 under the 1940 Act.
    
       Section 1. The Trust has adopted this Class E Distribution Plan ("Plan")
to enable the Trust to directly or indirectly bear expenses relating to the
distribution of the Shares of the Portfolios.      
    
       Section 2. The Trust may incur expenses for the items stipulated in
Section 3 of this Plan in an amount equal to .05% of the average daily net
assets of the Shares of the Portfolios. All expenditures pursuant to this Plan
shall be made only pursuant to authorization by the President, any Vice
President or the Treasurer of the Trust. If there should be more than one series
of Trust shares, expenses incurred pursuant to this Plan shall be allocated
among the several series of the Trust on the basis of their relative net asset
values, unless otherwise determined by a majority of the Qualified Trustees.
     
       In addition, the Trust will pay the Distributor a fee on the Shares of
the Portfolios up to the amount set forth on Exhibit A. The Distributor may use
this fee for compensation for its services in connection with distribution
assistance or the provision of shareholder services.

       Section 3. Expenses permitted pursuant to this Plan shall include, and be
limited to, the following:

       (a)     The incremental printing costs incurred in producing for and
               distributing to persons other than current shareholders of the
               Trust the reports, prospectuses, notices and similar materials
               that are prepared by the Trust for current shareholders;

       (b)     advertising;

       (c)     the costs of preparing, printing and distributing any literature
               used in connection with the offering of the Trust's Shares and
               not covered by Section 3(a) of this Plan; and

       (d)     expenses incurred in connection with the promotion and sale of
               the Trust's Shares including, without limitation, travel and
               communication expenses and expenses for the compensation of and
               benefits for sales personnel.

       Section 4. This Plan shall not take effect with respect to any Portfolio
until it has been approved (a) by a vote of at least a majority of the
outstanding voting securities of the Shares of such Portfolio; and (b) together
with any related agreements, by votes of the majority of both (i) the Trustees

                                       11
<PAGE>
 
of the Trust and (ii) the Qualified Trustees, cast in person at a Board of
Trustees meeting called for the purpose of voting on this Plan or such
agreement.

       Section 5. This Plan shall continue in effect for a period of more than
one year after it takes effect only for so long as such continuance is
specifically approved at least annually in the manner provided in Part (b) of
Section 4 herein for the approval of this Plan.

       Section 6. Any person authorized to direct the disposition of monies paid
or payable by the Trust pursuant to this Plan or any related agreement shall
provide to the Trustees of the Trust, at least quarterly, a written report of
the amounts so expended and the purposes for which such expenditures were made.

       Section 7. This Plan may be terminated at any time by the vote of a
majority of the Qualified Trustees or by vote of a majority of the outstanding
voting securities of the Shares of the Portfolios.

       Section 8. All agreements with any person relating to implementation of
this Plan shall be in writing, and any agreement related to this Plan shall
provide (a) that such agreement may be terminated at any time, without payment
of any penalty, by the vote of a majority of the Qualified Trustees or by the
vote of Shareholders holding a majority of the Trust's outstanding voting
securities, on not more than 60 days written notice to any other party to the
agreement; and (b) that such agreement shall terminate automatically in the
event of its assignment.

       Section 9. This Plan may not be amended to increase materially the amount
of distribution expenses permitted pursuant to Section 2 hereof without the
approval of shareholders holding a majority of the outstanding voting securities
of the Shares of the Portfolios, and all material amendments to this Plan shall
be approved in the manner provided in Part (b) of Section 4 herein for the
approval of this Plan.

       Section 10. As used in this Plan, (a) the term "Qualified Trustees" shall
mean those Trustees of the Trust who are not interested persons of the Trust,
and have no direct or indirect financial interest in the operation of this Plan
or any agreements related to it, and (b) the terms "assignment" and "interested
person" shall have the respective meanings specified in the 1940 Act and the
rules and regulations thereunder, subject to such exemptions as may be granted
by the Securities and Exchange Commission.

       Section 11. While this Plan is in effect, the selection and nomination of
those Trustees who are not interested persons of the Trust within the meaning of
Section 2(a)(19) of the 1940 Act shall be committed to the discretion of the
Trustees then in office who are not interested persons of the Trust.

       Section 12. This Plan shall not obligate the Trust or any other party to
enter into an agreement with any particular person.

                                       12
<PAGE>
 
                                   EXHIBIT A



S&P 500 Index Portfolio                                                  .15%

                                       13

<PAGE>
 
                                SEI INDEX FUNDS

                                   Rule 18f-3
                              Multiple Class Plan


                                December 4, 1995



          SEI Index Funds (the "Trust"), a registered investment company that
currently consists of a number of separately managed funds, has elected to rely
on Rule 18f-3 under the Investment Company Act of 1940, as amended (the "1940
Act"), in offering multiple classes of shares in each fund listed on Schedule A
hereto (each a "Fund" and together the "Funds").

A.      ATTRIBUTES OF SHARE CLASSES

          1. The rights of each class of shares of the Funds shall be as set
forth in the respective Certificate of Class Designation for each class (each a
"Certificate") as each such Certificate is approved by the Trust's Board of
Trustees and as attached hereto as Exhibits.

          2. With respect to each class of shares created hereunder, each share
of a Fund will represent an equal pro rata interest in the Fund and will have
identical terms and conditions, except that: (i) each new class will have a
different class name (or other designation) that identifies the class as
separate from any other class; (ii) each class will be offered and sold only to
investors meeting the qualifications set forth in the Certificate and disclosed
in the Trust's Prospectus; (iii) each class will separately bear any
distribution fees that are payable in connection with a distribution plan
adopted pursuant to Rule 12b-1 under the 1940 Act (a "Distribution Plan"), and
separately bear any other service fees ("service fees") that are payable under
any service agreement entered into with respect to that class which are not
contemplated by or within the scope of the Distribution Plan; (iv) each class
may bear, consistent with rulings and other published statements of position by
the Internal Revenue Service, the expenses of the Fund's operations which are
directly attributable to such class ("Class Expenses"); and (v) shareholders of
each class will have exclusive voting rights regarding any matter submitted to
shareholders that relates solely to such class (such as a Distribution Plan or
service agreement relating to such class), and will have separate voting rights
on any matter submitted to shareholders in which the interests of that class
differ from the interests of any other class.

B.      EXPENSE ALLOCATIONS

          With respect to each Fund, the expenses of each class shall be
allocated as follows: (i) any Rule 12b-1 fees relating to a particular class of
shares associated with a Distribution Plan or service fees relating to a
particular class of shares are (or will be) borne exclusively by that class;
(ii) any incremental transfer agency fees relating to a particular class are (or
will be) borne exclusively by that class; and (iii) Class Expenses relating to a
particular class are (or will be) borne exclusively by that class.

               Non-class specific expenses shall be allocated in accordance with
Rule 18f-3(c).

C.      AMENDMENT OF PLAN; PERIODIC REVIEW

          This Plan must be amended to properly describe (through additional
exhibits hereto) each new class of shares upon its approval by the Board.

          The Board of Trustees of the Trust, including a majority of the
Trustees who are 

<PAGE>
 

not "interested persons" of the Trust as defined in the 1940 Act, must review
this Plan at least quarterly for its continued appropriateness, and must approve
any material amendment of the Plan as it relates to any class of any Fund
covered by the Plan. In approving any material amendment to the Plan, the
Trustees, including a majority of the Trustees who are not interested persons of
the Trust, must find that the amendment is in the best interests of each class
individually and the Trust as a whole.

<PAGE>
 
                                                                       Exhibit A


                           SEI ASSET ALLOCATION TRUST
                        CERTIFICATE OF CLASS DESIGNATION


                                 Class A Shares


1.  Class-Specific Distribution Arrangements, Other Expenses

       Class A shares are sold without a load or sales charge, but are subject
to a Rule 12b-1 fee. The Trust, on behalf of the applicable Fund, will make
monthly payments to the Distributor under the Distribution Plan approved by the
Board of Trustees at an annual rate of up to .05% of each Fund's average daily
net assets attributable to the Class A shares. The Distributor may receive up to
 .05% of each Fund's average daily net assets attributable to the Class A shares
as reimbursement for expenses associated with (a) incremental printing costs
incurred in producing for and distributing to persons other than current
shareholders of the Fund the reports, prospectuses notices and similar materials
that are prepared by the Fund for current shareholders, (b) the cost of
complying with state and federal laws pertaining to the Class A shares, (c)
advertising, (d) the costs of preparing, printing and distributing any
literature used in connection with the offering of the Fund's Class A shares and
not covered by (a), and (e) expenses incurred in connection with the promotion
and sale of the Fund's Class A shares including, without limitation. travel and
communication expenses and expenses for the compensation of and benefits for
sales personnel.

2.     Eligibility of Purchasers

       Class A Shares do not require a minimum initial investment and are
available only to financial institutions and intermediaries.

3.  Exchange Privileges

       Class A Shares of each Fund may be exchanged for Class A Shares of each
other Fund of the Trust in accordance with the procedures disclosed in the
Fund's Prospectus and subject to and applicable limitations resulting from the
closing of Funds to new investors.

4.     Voting Rights

       Each Class A shareholder will have one vote for each full Class A Share
held and a fractional vote for each fractional Class Share A held. Class A
shareholders will have exclusive voting rights regarding any matter submitted to
shareholders that relates solely to Class A (such as a distribution plan or
service agreement relating to Class A), and will have separate voting rights on
any other matter submitted to shareholders in which the interests of the Class A
Shareholders differ from the interests of holders of any other class.

5.  Conversion Rights

       Class A Shares do not have a conversion feature.
<PAGE>

                                   Schedule A
                                   ----------


                                SEI Index Funds


Fund
- ----


S&P 500 Index Portfolio
 

<PAGE>
 
                                                                       Exhibit B


                                SEI INDEX FUNDS
                        CERTIFICATE OF CLASS DESIGNATION

                                    
                                Class E Shares      


1.     Class-Specific Distribution Arrangements; Other Expenses
    
       The Class E shares (the "Shares") are sold without a load or sales
charge, but are subject to a Rule 12b-1 fee. The Trust, on behalf of the
applicable Fund, will make monthly payments to the Distributor under the
Distribution Plan approved by the Board of Trustees at an annual rate of up to
 .20% of each Fund's average daily net assets attributable to the Shares. The
Distributor may receive up to .05% of each Fund's average daily net assets
attributable to the Shares as reimbursement for expenses associated with (a)
incremental printing costs incurred in producing for and distributing to persons
other than current shareholders of the Fund the reports, prospectuses, notices
and similar materials that are prepared by the Fund for current shareholders,
(b) advertising, (c) the costs of preparing, printing and distributing any
literature used in connection with the offering of the Fund's Shares and not
covered by (a), and (d) expenses incurred in connection with the promotion and
sale of the Fund's Shares including, without limitation. travel and
communication expenses and expenses for the compensation of and benefits for
sales personnel. In addition. the Distributor may receive up to .15% of each
Fund's average daily net assets attributable to the Shares to compensate it for
distribution assistance or the provision of shareholder services.      

2.     Eligibility of Purchasers

       The Shares do not require a minimum initial investment and are available
only to financial institutions and intermediaries.

3.  Exchange Privileges

       The Shares of each Fund may be exchanged for Shares of each other Fund of
the Trust in accordance with the procedures disclosed in the Fund's Prospectus
and subject to any applicable limitations resulting from the closing of Funds to
new investors.

4.     Voting Rights
    
       Each Class E shareholder will have one vote for each full Share held and
a fractional vote for each fractional Share held. Class E shareholders will have
exclusive voting rights regarding any matter submitted to shareholders that
relates solely to the Shares (such as a distribution plan or service agreement
relating to the Shares), and will have separate voting rights on any other
matter submitted to shareholders in which the interests of the Class E
shareholders differ from the interests of holders of any other class.      

5.  Conversion Rights

       The Shares do not have a conversion feature.
<PAGE>
 
                  AMENDED AND RESTATED DISTRIBUTION AGREEMENT
                                SEI INDEX FUNDS


        THIS AGREEMENT is made as of this 5th day of December, 1995 between SEI
Index Funds (the "Trust"), a Massachusetts business trust, and SEI Financial
Services Company (the "Distributor"), a Pennsylvania corporation.

        WHEREAS, the Trust is registered as an investment company with the
Securities and Exchange Commission (the "SEC") under the Investment Company Act
of 1940, as amended (the "1940 Act"), and its shares are registered with the SEC
under the Securities Act of 1933, as amended (the "1933 Act"); and

        WHEREAS, the Distributor is registered as a broker-dealer with the SEC
under the Securities Exchange Act of 1934, as amended;

        WHEREAS, the Trust and the Distributor are parties to that certain
Distribution Agreement dated July 10, 1985 (the "July Agreement");

        WHEREAS, the parties wish to amend and restate the terms of the July
Agreement as set forth herein.

        NOW, THEREFORE, in consideration of the mutual covenants hereinafter
contained, the Trust and the Distributor hereby agree as follows:

        ARTICLE 1. Sale of Shares. The Trust grants to the Distributor the
exclusive right to sell shares (the "Shares") of the portfolios (the
"Portfolios") of the Trust at the net asset value per Share, plus any applicable
sales charge in accordance with the Trust's current prospectuses, as agent and
on behalf of the Trust, during the term of this Agreement and subject to the
registration requirements of the 1933 Act, the rules and regulations of the SEC
and the laws governing the sale of securities in the various states (the "Blue
Sky Laws").

        ARTICLE 2. Solicitation of Sales. In consideration of these rights
granted to the Distributor, the Distributor agrees to use all reasonable
efforts, consistent with its other business, in connection with the distribution
of the Shares of the Trust; provided, however, that the Distributor shall not be
prevented from entering into like arrangements with other issuers. The
provisions of this paragraph do not obligate the Distributor to register as a
broker or dealer under the Blue Sky Laws of any jurisdiction when it determines
it would be uneconomical for it to do so or to maintain its registration in any
jurisdiction in which it is now registered nor obligate the Distributor to sell
any particular number of Shares.

        ARTICLE 3. Compensation. As compensation for providing the services
under this Agreement:

        (a) The Distributor shall receive from the Trust:

            (1) all distribution and service fees, as applicable, at the
            rate and under the terms and conditions set forth in each
            Distribution and Service Plan adopted by the appropriate class
            of Shares of each of the Portfolios, as such Plans may be
            amended from time to time, and subject to any further
            limitations on such fees as the Board of Trustees of the Trust
            may impose;

                                       6
<PAGE>
 
            (2) all contingent deferred sales charges ("CDSC") applied on
            redemptions of CDSC Class Shares, as applicable, of each
            Portfolio on the terms and subject to such waivers as are
            described in the Trust's Registration Statement and current
            prospectuses, as amended from time to time, or as otherwise
            required pursuant to applicable law; and
            
            (3) all front-end sales charges, as applicable, on purchases of
            front-end load Shares of each Portfolio sold subject to such
            charges as described in the Trust's Registration Statement and
            current prospectuses, as amended from time to time. The
            Distributor, or brokers, dealers and other financial
            institutions and intermediaries that have entered into sub-
            distribution agreements with the Distributor, may collect the
            gross proceeds derived from the sale of such front-end load
            Shares, remit the net asset value thereof to the Trust upon
            receipt of the proceeds and retain the applicable sales charge.

        (b) The Distributor may reallow any or all of the distribution or
        service fees, CDSC and front-end sales charges which it is paid by the
        Trust to such brokers, dealers and other financial institutions and
        intermediaries as the Distributor may from time to time determine.

        (c) The Distributor may transfer its right to the payments described in
        this Article 3 to third persons who provide funding to the Distributor,
        provided that any such transfer shall not be deemed a transfer of the
        Distributor's obligations under this Agreement. Upon receipt of
        direction from the Distributor to pay such fees to a transferee, the
        Trust shall make payment in accordance with such direction.

        ARTICLE 4. Authorized Representations. The Distributor is not authorized
by the Trust to give any information or to make any representations other than
those contained in the current registration statements and prospectuses of the
Trust filed with the SEC or contained in Shareholder reports or other material
that may be prepared by or on behalf of the Trust for the Distributor's use. The
Distributor may prepare and distribute sales literature and other material as it
may deem appropriate, provided that such literature and materials have been
prepared in accordance with applicable rules and regulations.

        ARTICLE 5. Registration of Shares. The Trust agrees that it will take
all action necessary to register Shares under the federal and state securities
laws so that there will be available for sale the number of Shares the
Distributor may reasonably be expected to sell and to pay all fees associated
with said registration. The Trust shall make available to the Distributor such
number of copies of its currently effective prospectuses and statement of
additional information as the Distributor may reasonably request. The Trust
shall furnish to the Distributor copies of all information, financial statements
and other papers which the Distributor may reasonably request for use in
connection with the distribution of Shares of the Trust.

        ARTICLE 6. Indemnification of Distributor. The Trust agrees to indemnify
and hold harmless the Distributor and each of its Trustees and officers and each
person, if any, who controls the Distributor within the meaning of Section 15 of
the 1933 Act against any loss, liability, claim, damages or expense (including
the reasonable cost of investigating or defending any alleged loss, liability,
claim, damages, or expense and reasonable counsel fees and disbursements
incurred in connection therewith), arising by reason of any person acquiring any
Shares, based upon the ground that the registration statement, prospectus,
Shareholder reports or other information filed or made public by the Trust (as
from time to time amended) included an untrue statement of a material tact or
omitted to state a material tact required to be stated or necessary in order to
make the statements made not misleading. However, the Trust does not agree to
indemnify the Distributor or hold it harmless to the extent that the statements
or omission was made in reliance upon, and in conformity with, information
tarnished to the Trust by or on behalf of the Distributor.

        In no case (i) is the indemnity of the Trust to be deemed to protect the
Distributor against any liability to the Trust or its Shareholders to which the
Distributor or such person otherwise would be subject by 

                                       7
<PAGE>
 
reason of willful misfeasance, bad faith or gross negligence in the performance
of its duties or by reason of its reckless disregard of its obligations and
duties under this Agreement, or (ii) is the Trust to be liable to the
Distributor under the indemnity agreement contained in this paragraph with
respect to any claim made against the Distributor or any person indemnified
unless the Distributor or other person shall have notified the Trust in writing
of the claim within a reasonable time alter the summons or other first written
notification giving information of the nature of the claim shall have been
served upon the Distributor or such other person (or alter the Distributor or
the person shall have received notice of service on any designated agent).
However, failure to notify the Trust of any claim shall not relieve the Trust
from any liability which it may have to the Distributor or any person against
whom such action is brought otherwise than on account of its indemnity agreement
contained in this paragraph.

        The Trust shall be entitled to participate at its own expense in the
defense or, if it so elects, to assume the defense of any suit brought to
enforce any claims subject to this indemnity provision.  If the Trust elects to
assume the defense of any such claim, the defense shall be conducted by counsel
chosen by the Trust and satisfactory to the indemnified defendants in the suit
whose approval shall not be unreasonably withheld. In the event that the Trust
elects to assume the defense of any suit and retain counsel, the identified
defendants shall bear the fees and expenses of any additional counsel retained
by them. If the Trust does not elect to assume the defense of a suit, it will
reimburse the indemnified defendants for the reasonable fees and expenses of any
counsel retained by the indemnified defendants.

        The Trust agrees to notify the Distributor promptly of the commencement
of any litigation or proceedings against it or any of its officers or Trustees
in connection with the issuance or sale of any of its Shares.

        ARTICLE 7. Indemnification of Trust. The Distributor covenants and
agrees that it will indemnity and hold harmless the Trust and each of its
Trustees and officers and each person, if any, who controls the Trust within the
meaning of Section 15 of the Act, against any loss, liability, damages, claim or
expense (including the reasonable cost of investigating or defending any alleged
loss, liability, damages, claim or expense and reasonable counsel fees incurred
in connection therewith) based upon the 1933 Act or any other statute or common
law and arising by reason of any person acquiring any Shares, and alleging a
wrongful act of the Distributor or any of its employees or alleging that the
registration statement, prospectus, Shareholder reports or other information
filed or made public by the Trust (a- from time to time amended) included an
untrue statement of a material tact or omitted to state a material tact required
to be stated or necessary in order to make the statements not misleading,
insofar as the statement or omission was made in reliance upon and in conformity
with information furnished to the Trust by or on behalf of the Distributor.

        In no case (i) is the indemnity of the Distributor in favor of the Trust
or any other person indemnified to be deemed to protect the Trust or any other
person against any liability to which the Trust or such other person would
otherwise be subject by reason of willful misfeasance, bad faith or gross
negligence in the performance of its duties or by reason of its reckless
disregard of its obligations and duties under this Agreement, or (ii) is the
Distributor to be liable under its indemnity agreement contained in this
paragraph with respect to any claim made against the Trust or any person
indemnified unless the Trust or person, as the case may be, shall have notified
the Distributor in writing of the claim within a reasonable time alter the
summons or other first written notification giving information of the nature of
the claim shall have been served upon the Trust or upon any person (or after the
Trust or such person shall have received notice of service on any designated
agent). However, failure to notify the Distributor of any claim shall not
relieve the Distributor from any liability which ft may have to the Trust or any
person against whom the action is brought otherwise than on account of its
indemnity agreement contained in this paragraph.

        The Distributor shall be entitled to participate, at its own expense, in
the defense or, if it so elects, to assume the defense of any suit brought to
enforce the claim, but if the Distributor elects to assume the defense, the
defense shall be conducted by counsel chosen by the Distributor and satisfactory
to the indemnified defendants whose approval shall not be unreasonably withheld.
In the event that the Distributor elects to assume the defense of any suit and
retain counsel, the defendants in the suit shall bear the fees and expenses of
any additional counsel retained by them. If the Distributor does not elect to
assume the defense 

                                       8
<PAGE>
 
of any suit, it will reimburse the indemnified defendants in the suit for the
reasonable fees and expenses of any counsel retained by them.

        The Distributor agrees to notify the Trust promptly of the commencement
of any litigation or proceedings against it in connection with the issue and
sale of any of the Trust's Shares.

        ARTICLE 8. Effective Date. This Agreement shall be effective upon its
execution, and unless terminated as provided, shall continue in force for one
year from the effective date and thereafter from year to year, provided that
such annual continuance is approved by (i) either the vote of a majority of the
Trustees of the Trust, or the vote of a majority of the outstanding voting
securities of the Trust, and (ii) the vote of a majority of those Trustees of
the Trust who are not parties to this Agreement or the Trust's Distribution Plan
or interested persons of any such party ("Qualified Trustees"), cast in person
at a meeting called for the purpose of voting on the approval.  This Agreement
shall automatically terminate in the event of its assignment. As used in this
paragraph the terms "vote of a majority of the outstanding voting securities",
"assignment" and "interested person" shall have the respective meanings
specified in the 1940 Act. In addition, this Agreement may at any time be
terminated without penalty by the Distributor, by a vote of a majority of
Qualified Trustees or by vote of a majority of the outstanding voting securities
of the Trust upon not less than sixty days prior written notice to the other
party.

        ARTICLE 9. Notices. Any notice required or permitted to be given by
either party to the other shall be deemed sufficient if sent by registered or
certified mail, postage prepaid, addressed by the party giving notice to the
other party at the last address furnished by the other party to the party giving
notice: if to the Trust, at 680 East Swedesford Road, Wayne, Pennsylvania, and
if to the Distributor, at 680 East Swedesford Road, Wayne, Pennsylvania 19087.
    
        ARTICLE 10. Limitation of Liability. A copy of the Declaration of Trust
of the Trust is on file with the Secretary of State of Massachusetts, and notice
is hereby given that this Agreement is executed on behalf of the Trustees of the
Trust as Trustees and not individually and that the obligations of this
instrument are not binding upon any of the Trustees, officers or shareholders of
the Trust individually but binding only upon the assets and property of the
Trust.      

        ARTICLE 11. Governing Law. This Agreement shall be construed in
accordance with the laws of the state of Massachusetts and the applicable
provisions of the 1940 Act. To the extent that the applicable laws of the state
of Massachusetts, or any of the provisions herein, conflict with the applicable
provisions of the 1940 Act, the latter shall control.

        ARTICLE 12. Multiple Originals. This Agreement may be executed in two or
more counterparts, each of which when so executed shall be deemed to be an
original, but such counterparts shall together constitute but one and the same
instrument.

        IN WITNESS, the Trust and Distributor have each duly executed this
Agreement, as of the day and year above written.


                                               SEI INDEX FUNDS


                                               By:________________________


                                               Attest:____________________



                                               SEI FINANCIAL SERVICES 

                                       9
<PAGE>
 
                                               COMPANY


                                               By:_________________________


                                               Attest:_____________________

                                       10
<PAGE>
 
                               DISTRIBUTION PLAN
                                SEI INDEX FUNDS
                                        
                                    CLASS E      


       WHEREAS, SEI Index Funds (the "Trust") is engaged in business as an open-
end investment company registered under the Investment Company Act of 1940, as
amended ("1940 Act"); and
    
       WHEREAS, the Trustees of the Trust have determined that there is a
reasonable likelihood that the following Distribution Plan will benefit the
Portfolios of the Trust listed on Exhibit A hereto (the "Portfolios") and the
owners of the Class E of shares of such Portfolios (the "Shares");      

       NOW, THEREFORE, the Trustees of the Trust hereby adopt this Distribution
Plan pursuant to Rule 12b-1 under the 1940 Act.
    
       Section 1. The Trust has adopted this Class E Distribution Plan ("Plan")
to enable the Trust to directly or indirectly bear expenses relating to the
distribution of the Shares of the Portfolios.      
    
       Section 2. The Trust may incur expenses for the items stipulated in
Section 3 of this Plan in an amount equal to .05% of the average daily net
assets of the Shares of the Portfolios. All expenditures pursuant to this Plan
shall be made only pursuant to authorization by the President, any Vice
President or the Treasurer of the Trust. If there should be more than one series
of Trust shares, expenses incurred pursuant to this Plan shall be allocated
among the several series of the Trust on the basis of their relative net asset
values, unless otherwise determined by a majority of the Qualified Trustees.
     
       In addition, the Trust will pay the Distributor a fee on the Shares of
the Portfolios up to the amount set forth on Exhibit A. The Distributor may use
this fee for compensation for its services in connection with distribution
assistance or the provision of shareholder services.

       Section 3. Expenses permitted pursuant to this Plan shall include, and be
limited to, the following:

       (a)     The incremental printing costs incurred in producing for and
               distributing to persons other than current shareholders of the
               Trust the reports, prospectuses, notices and similar materials
               that are prepared by the Trust for current shareholders;

       (b)     advertising;

       (c)     the costs of preparing, printing and distributing any literature
               used in connection with the offering of the Trust's Shares and
               not covered by Section 3(a) of this Plan; and

       (d)     expenses incurred in connection with the promotion and sale of
               the Trust's Shares including, without limitation, travel and
               communication expenses and expenses for the compensation of and
               benefits for sales personnel.

       Section 4. This Plan shall not take effect with respect to any Portfolio
until it has been approved (a) by a vote of at least a majority of the
outstanding voting securities of the Shares of such Portfolio; and (b) together
with any related agreements, by votes of the majority of both (i) the Trustees

                                       11
<PAGE>
 
of the Trust and (ii) the Qualified Trustees, cast in person at a Board of
Trustees meeting called for the purpose of voting on this Plan or such
agreement.

       Section 5. This Plan shall continue in effect for a period of more than
one year after it takes effect only for so long as such continuance is
specifically approved at least annually in the manner provided in Part (b) of
Section 4 herein for the approval of this Plan.

       Section 6. Any person authorized to direct the disposition of monies paid
or payable by the Trust pursuant to this Plan or any related agreement shall
provide to the Trustees of the Trust, at least quarterly, a written report of
the amounts so expended and the purposes for which such expenditures were made.

       Section 7. This Plan may be terminated at any time by the vote of a
majority of the Qualified Trustees or by vote of a majority of the outstanding
voting securities of the Shares of the Portfolios.

       Section 8. All agreements with any person relating to implementation of
this Plan shall be in writing, and any agreement related to this Plan shall
provide (a) that such agreement may be terminated at any time, without payment
of any penalty, by the vote of a majority of the Qualified Trustees or by the
vote of Shareholders holding a majority of the Trust's outstanding voting
securities, on not more than 60 days written notice to any other party to the
agreement; and (b) that such agreement shall terminate automatically in the
event of its assignment.

       Section 9. This Plan may not be amended to increase materially the amount
of distribution expenses permitted pursuant to Section 2 hereof without the
approval of shareholders holding a majority of the outstanding voting securities
of the Shares of the Portfolios, and all material amendments to this Plan shall
be approved in the manner provided in Part (b) of Section 4 herein for the
approval of this Plan.

       Section 10. As used in this Plan, (a) the term "Qualified Trustees" shall
mean those Trustees of the Trust who are not interested persons of the Trust,
and have no direct or indirect financial interest in the operation of this Plan
or any agreements related to it, and (b) the terms "assignment" and "interested
person" shall have the respective meanings specified in the 1940 Act and the
rules and regulations thereunder, subject to such exemptions as may be granted
by the Securities and Exchange Commission.

       Section 11. While this Plan is in effect, the selection and nomination of
those Trustees who are not interested persons of the Trust within the meaning of
Section 2(a)(19) of the 1940 Act shall be committed to the discretion of the
Trustees then in office who are not interested persons of the Trust.

       Section 12. This Plan shall not obligate the Trust or any other party to
enter into an agreement with any particular person.

                                       12
<PAGE>
 
                                   EXHIBIT A



S&P 500 Index Portfolio                                                  .15%

                                       13

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                   CONSENT OF INDEPENDENT PUBLIC ACCOUNTANTS



As independent public accountants, we hereby consent to the incorporation by
reference in this registration statement of our report dated May 12, 1995, on
the March 31, 1995 financial statements of SEI Index Funds, included in the
Post-Effective Amendment No. 17 to the Registration Statement on Form N-1A of
SEI Index Funds (No. 2-97111), and to all references to our Firm included in or
made part of Post-Effective Amendment No. 18 to Registration Statement File No.
2-97111.



/s/ Arthur Andersen LLP
Philadelphia, PA
 December 22, 1995


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