SEI DAILY INCOME TRUST /MA/
497, 1998-11-23
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<PAGE>
SEI DAILY INCOME TRUST
NOVEMBER 15, 1998
- --------------------------------------------------------------------------------
 
GOVERNMENT II FUND
TREASURY II FUND
 
- --------------------------------------------------------------------------------
 
This Prospectus concisely sets forth information about the above-referenced
Funds 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 May 31, 1998, has been filed with
the Securities and Exchange Commission and is available upon request and without
charge by writing the Distributor, SEI Investments Distribution Co., Oaks,
Pennsylvania 19456, or by calling 1-800-342-5734. The Statement of Additional
Information is incorporated into this Prospectus by reference.
 
SEI Daily Income Trust (the "Trust") is an open-end management investment
company, certain classes of which offer 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. Some portfolios offer separate classes of units of beneficial
interest that differ from each other primarily in the allocation of certain
distribution and/or shareholder servicing expenses. This Prospectus offers Class
B and C shares of the Government II and Treasury II Funds (each a "Fund" and,
together, the "Funds").
 
AN INVESTMENT IN A FUND IS NEITHER INSURED NOR GUARANTEED BY THE U.S.
GOVERNMENT, AND THERE CAN BE NO ASSURANCE THAT ANY FUND WILL BE ABLE TO MAINTAIN
A STABLE NET ASSET VALUE OF $1.00 PER SHARE.
 
- --------------------------------------------------------------------------------
 
 THESE SECURITIES HAVE NOT BEEN APPROVED OR DISAPPROVED BY THE SECURITIES AND
 EXCHANGE COMMISSION, NOR HAS THE SECURITIES AND EXCHANGE COMMISSION PASSED
 UPON THE ACCURACY 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 INSURED BY THE
 FEDERAL DEPOSIT INSURANCE CORPORATION, THE FEDERAL RESERVE BOARD OR ANY OTHER
 GOVERNMENT AGENCY. INVESTMENT IN THE SHARES INVOLVES RISK, INCLUDING POSSIBLE
 LOSS OF THE PRINCIPAL AMOUNT INVESTED.
<PAGE>
ANNUAL OPERATING EXPENSES (AS A PERCENTAGE OF AVERAGE NET ASSETS)        CLASS B
- --------------------------------------------------------------------------------
 
<TABLE>
<CAPTION>
                                                                                           GOVERNMENT II   TREASURY
                                                                                               FUND        II FUND
                                                                                           -------------  ----------
<S>                                                                                        <C>            <C>
Management/Advisory Fees (AFTER FEE WAIVER) (1)                                                     .15%        .21%
12b-1 Fees                                                                                          none        none
Total Other Expenses                                                                                .35%        .34%
  Shareholder Servicing Fees                                                               .25%           .25%
- --------------------------------------------------------------------------------------------------------------------
Total Operating Expenses (AFTER FEE WAIVER) (2)                                                     .50%        .55%
- --------------------------------------------------------------------------------------------------------------------
</TABLE>
 
(1) THE MANAGER AND ADVISER HAVE WAIVED A PORTION OF THEIR FEES, AND THE
    MANAGEMENT/ADVISORY FEES SHOWN REFLECT THESE WAIVERS. ABSENT SUCH WAIVERS,
    MANAGEMENT/ADVISORY FEES WOULD BE .21% FOR THE GOVERNMENT II FUND AND .26%
    FOR THE TREASURY II FUND .
 
(2) ABSENT THIS FEE WAIVER, TOTAL OPERATING EXPENSES FOR THE CLASS B SHARES OF
    THE FUNDS WOULD BE .56% FOR THE GOVERNMENT II FUND AND .60% FOR THE TREASURY
    II FUND.
 
EXAMPLE                                                                  CLASS B
- --------------------------------------------------------------------------------
 
<TABLE>
<CAPTION>
                                                                                    1 YR.       3 YRS.       5 YRS.       10 YRS.
                                                                                 -----------  -----------  -----------  -----------
<S>                                                                              <C>          <C>          <C>          <C>
An investor would pay the following expenses on a $1,000 investment assuming
 (1) a 5% annual return and (2) redemption at the end of each time period:
  Government II Fund                                                              $       5    $      16    $      28    $      63
  Treasury II Fund                                                                $       6    $      18    $      31    $      69
- -----------------------------------------------------------------------------------------------------------------------------------
</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 THIS TABLE IS TO ASSIST THE INVESTOR IN UNDERSTANDING THE VARIOUS
COSTS AND EXPENSES THAT MAY BE DIRECTLY OR INDIRECTLY BORNE BY INVESTORS IN
CLASS B SHARES OF THE FUNDS. A PERSON WHO PURCHASES SHARES THROUGH A FINANCIAL
INSTITUTION MAY BE CHARGED SEPARATE FEES BY THAT INSTITUTION. EACH OF THE FUNDS
ALSO OFFERS CLASS A SHARES, CLASS C SHARES AND SWEEP CLASS SHARES, WHICH ARE
SUBJECT TO THE SAME EXPENSES, EXCEPT THAT CLASS A, CLASS C, AND SWEEP CLASS
SHARES EACH HAVE DIFFERENT DISTRIBUTION AND/OR SHAREHOLDER SERVICING COSTS.
ADDITIONAL INFORMATION MAY BE FOUND UNDER "THE MANAGER," "THE ADVISER" AND
"DISTRIBUTION AND SHAREHOLDER SERVICING."
 
                                                                               2
<PAGE>
ANNUAL OPERATING EXPENSES (AS A PERCENTAGE OF AVERAGE NET ASSETS)        CLASS C
- --------------------------------------------------------------------------------
 
<TABLE>
<CAPTION>
                                                                                           GOVERNMENT II   TREASURY
                                                                                               FUND        II FUND
                                                                                           -------------  ----------
<S>                                                                                        <C>            <C>
Management/Advisory Fees (AFTER FEE WAIVER) (1)                                                     .15%        .21%
12b-1 Fees                                                                                          none        none
Total Other Expenses                                                                                .55%        .54%
  Shareholder Servicing Fees                                                               .25%           .25%
- --------------------------------------------------------------------------------------------------------------------
Total Operating Expenses (AFTER FEE WAIVERS) (2)                                                    .70%        .75%
- --------------------------------------------------------------------------------------------------------------------
</TABLE>
 
(1) THE MANAGER AND ADVISER HAVE WAIVED A PORTION OF THEIR FEES, AND THE
    MANAGEMENT/ADVISORY FEES SHOWN REFLECT THESE WAIVERS. ABSENT SUCH WAIVERS,
    MANAGEMENT/ADVISORY FEES WOULD BE .21% FOR THE GOVERNMENT II FUND AND .26%
    FOR THE TREASURY II FUND.
 
(2) ABSENT THIS FEE WAIVER, TOTAL OPERATING EXPENSES FOR THE CLASS C SHARES OF
    THE FUNDS WOULD BE .76% FOR THE GOVERNMENT II FUND AND .80% FOR THE TREASURY
    II FUND.
 
EXAMPLE                                                                  CLASS C
- --------------------------------------------------------------------------------
 
<TABLE>
<CAPTION>
                                                                                    1 YR.       3 YRS.       5 YRS.       10 YRS.
                                                                                 -----------  -----------  -----------  -----------
<S>                                                                              <C>          <C>          <C>          <C>
An investor would pay the following expenses on a $1,000 investment assuming
 (1) a 5% annual return and (2) redemption at the end of each time period:
  Government II Fund                                                              $       7    $      22    $      39    $      87
  Treasury II Fund                                                                $       8    $      24    $      42    $      93
- -----------------------------------------------------------------------------------------------------------------------------------
</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 THIS TABLE IS TO ASSIST THE INVESTOR IN UNDERSTANDING THE VARIOUS
COSTS AND EXPENSES THAT MAY BE DIRECTLY OR INDIRECTLY BORNE BY INVESTORS IN
CLASS C SHARES OF THE FUNDS. A PERSON WHO PURCHASES SHARES THROUGH A FINANCIAL
INSTITUTION MAY BE CHARGED SEPARATE FEES BY THAT INSTITUTION. EACH OF THE FUNDS
ALSO OFFERS CLASS A, CLASS B AND SWEEP CLASS SHARES, WHICH ARE SUBJECT TO THE
SAME EXPENSES, EXCEPT THAT CLASS A, CLASS B, AND SWEEP CLASS SHARES EACH HAVE
DIFFERENT DISTRIBUTION AND/OR SHAREHOLDER SERVICING COSTS. ADDITIONAL
INFORMATION MAY BE FOUND UNDER "THE MANAGER," "THE ADVISER" AND "DISTRIBUTION
AND SHAREHOLDER SERVICING."
 
                                                                               3
<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, dated March 6, 1998, was unqualified. This information
should be read in conjunction with the Trust's financial statements as of and
for the fiscal year ended January 31, 1998, and notes thereto, which are
incorporated by reference to the Trust's Statement of Additional Information
under the heading "Financial Information." Additional performance information is
set forth in the Trust's 1998 Annual Report to shareholders, which is available
upon request and without charge by calling 1-800-342-5734.
<TABLE>
<CAPTION>
FOR A SHARE OUTSTANDING
THROUGHOUT EACH PERIOD
                                NET ASSET                NET REALIZED AND   DISTRIBUTIONS
                                  VALUE        NET       UNREALIZED GAINS    FROM NET    DISTRIBUTIONS
                                BEGINNING   INVESTMENT     (LOSSES) ON      INVESTMENT   FROM REALIZED
                                OF PERIOD     INCOME        SECURITIES        INCOME     CAPITAL GAINS
                                ----------------------------------------------------------------------
<S>                             <C>         <C>          <C>                <C>          <C>
- --------------------
GOVERNMENT II FUND
- --------------------
CLASS B
  1998                           $ 1.00       $0.05              $--          $(0.05)          $--
  1997                             1.00        0.05               --           (0.05)           --
  1996                             1.00        0.05               --           (0.05)           --
  1995                             1.00        0.04               --           (0.04)           --
  1994                             1.00        0.03               --           (0.03)           --
  1993                             1.00        0.03               --           (0.03)           --
  1992                             1.00        0.05               --           (0.05)           --
  1991(1)                          1.00        0.00               --           (0.00)           --
CLASS C
  1998                           $ 1.00       $0.05              $--          $(0.05)          $--
  1997(2)                          1.00        0.01               --           (0.01)           --
- -----------------
TREASURY II FUND
- -----------------
CLASS B
  1998                           $ 1.00       $0.05              $--          $(0.05)          $--
  1997                             1.00        0.05               --           (0.05)           --
  1996                             1.00        0.05               --           (0.05)           --
  1995                             1.00        0.04               --           (0.04)           --
  1994                             1.00        0.03               --           (0.03)           --
  1993                             1.00        0.03               --           (0.03)           --
  1992                             1.00        0.05               --           (0.05)           --
  1991(3)                          1.00        0.07               --           (0.07)           --
CLASS C
  1998                           $ 1.00       $0.05              $--          $(0.05)          $--
  1997                             1.00        0.04               --           (0.04)           --
  1996(4)                          1.00        0.04               --           (0.04)           --
 
<CAPTION>
FOR A SHARE OUTSTANDING
THROUGHOUT EACH PERIOD
                                                                                                              RATIO OF
                                                                                                                NET
                                                                                    RATIO OF     RATIO OF    INVESTMENT
                                                                                      NET        EXPENSES    INCOME TO
                                                                       RATIO OF    INVESTMENT   TO AVERAGE    AVERAGE
                                NET ASSET               NET ASSETS     EXPENSES    INCOME TO    NET ASSETS   NET ASSETS
                                VALUE END    TOTAL        END OF      TO AVERAGE    AVERAGE     (EXCLUDING   (EXCLUDING
                                OF PERIOD    RETURN    PERIOD (000)   NET ASSETS   NET ASSETS    WAIVERS)     WAIVERS)
                                ---------------------------------------------------------------------------------------
<S>                             <C>         <C>        <C>            <C>          <C>          <C>          <C>
- --------------------
GOVERNMENT II FUND
- --------------------
CLASS B
  1998                           $ 1.00        5.14%     $ 31,851        0.50%        5.02%        0.56%        4.96%
  1997                             1.00        4.98        16,323        0.50         4.87         0.56         4.81
  1996                             1.00        5.52        19,678        0.50         5.41         0.59         5.32
  1995                             1.00        4.08        15,201        0.50         4.33         0.60         4.23
  1994                             1.00        2.71        21,462        0.50         2.68         0.60         2.58
  1993                             1.00        3.26           338        0.50         3.35         0.59         3.26
  1992                             1.00        5.02         1,906        0.48         4.75         0.59         4.64
  1991(1)                          1.00        0.00           607        0.50         6.44         3.76         3.18
CLASS C
  1998                           $ 1.00        4.93%     $ 35,272        0.70%        4.82%        0.76%        4.76%
  1997(2)                          1.00        4.71         6,359        0.70         4.69         0.75         4.64
- -----------------
TREASURY II FUND
- -----------------
CLASS B
  1998                           $ 1.00        4.88%     $ 69,572        0.55%        4.78%        0.61%        4.72%
  1997                             1.00        4.76        54,148        0.55         4.65         0.63         4.57
  1996                             1.00        5.27        26,447        0.55         5.18         0.64         5.09
  1995                             1.00        3.86        44,680        0.55         3.71         0.65         3.61
  1994                             1.00        2.57        22,448        0.55         2.54         0.64         2.46
  1993                             1.00        3.15         6,038        0.55         3.42         0.64         3.33
  1992                             1.00        5.16       102,182        0.55         4.97         0.61         4.91
  1991(3)                          1.00        7.16        85,439        0.55         7.18         0.67         7.06
CLASS C
  1998                           $ 1.00        4.67%     $ 11,843        0.75%        4.58%        0.81%        4.52%
  1997                             1.00        4.55         4,528        0.75         4.45         0.82         4.38
  1996(4)                          1.00        3.64+        3,935        0.75         4.85         0.84         4.76
</TABLE>
 
 +  RETURNS ARE FOR THE PERIOD INDICATED AND HAVE NOT BEEN ANNUALIZED.
 (1) GOVERNMENT II CLASS B SHARES WERE OFFERED BEGINNING JANUARY 28, 1991. ALL
    RATIOS AND TOTAL RETURN FOR THAT PERIOD HAVE BEEN ANNUALIZED.
 (2) GOVERNMENT II CLASS C SHARES WERE OFFERED BEGINNING NOVEMBER 27, 1996. ALL
    RATIOS AND TOTAL RETURN FOR THAT PERIOD HAVE BEEN ANNUALIZED.
 (3) TREASURY II CLASS B SHARES WERE OFFERED BEGINNING FEBRUARY 15, 1990. ALL
    RATIOS AND TOTAL RETURN FOR THAT PERIOD HAVE BEEN ANNUALIZED.
 (4) TREASURY II CLASS C SHARES WERE OFFERED BEGINNING MAY 8, 1995. ALL RATIOS
    FOR THAT PERIOD HAVE BEEN ANNUALIZED.
 
                                                                               4
<PAGE>
THE TRUST
      __________________________________________________________________________
 
SEI DAILY INCOME TRUST (the "Trust") is an open-end management investment
company that offers units of beneficial interest ("shares") in separate
diversified investment portfolios. This Prospectus offers Class B and Class C
shares of the Trust's Government II and Treasury II Funds (each a "Fund" and,
together, the "Funds"). Each Fund has separate classes of shares which provide
for variations in distribution, shareholder servicing and transfer agency costs,
voting rights and dividends. Each of the Funds offers Class A, Class B, Class C
and Sweep Class shares. Additional information pertaining to the Trust may be
obtained by writing SEI Investments Distribution Co., Oaks, Pennsylvania 19456,
or by calling 1-800-342-5734.
 
INVESTMENT
OBJECTIVES AND
POLICIES
     ___________________________________________________________________________
 
GOVERNMENT II FUND
                     The Government II Fund seeks to preserve principal value
                     and maintain a high degree of liquidity while providing
                     current income. Under normal market conditions, the Fund
                     invests exclusively in U.S. Treasury obligations and
                     obligations issued or guaranteed as to principal and
                     interest by the agencies or instrumentalities of the U.S.
                     Government. Since the Government II Fund invests
                     exclusively in U.S. Treasury Obligations, its income is not
                     subject to state or local taxation.
 
TREASURY II FUND
                     The Treasury II Fund seeks to preserve principal value and
                     maintain a high degree of liquidity while providing current
                     income. Under normal market conditions, the Fund invests
                     exclusively in U.S. Treasury obligations.
 
                           There can be no assurance that the Funds will achieve
                     their respective investment objectives.
 
GENERAL INVESTMENT
POLICIES
     ___________________________________________________________________________
 
                     In purchasing obligations, the Funds comply with the
                     requirements of Rule 2a-7 under the Investment Company Act
                     of 1940 (the "1940 Act"), as that Rule may be amended from
                     time to time. These requirements currently provide that the
                     Funds must limit their investments to securities with
                     remaining maturities of 397 days or less, and must maintain
                     a dollar-weighted average maturity of 90 days or less. In
                     addition, under Rule 2a-7, the Funds may only invest in
                     securities (other than U.S. Government Securities) rated in
                     one of the two highest categories for short-term securities
                     by at least two nationally recognized statistical rating
                     organizations ("NRSROs") (or by one NRSRO if only one NRSRO
                     has rated the security), or, if unrated, determined by the
                     Adviser (in accordance with procedures adopted by the
                     Trust's Board of Trustees) to be of equivalent quality to
                     rated securities in which the Fund may invest.
 
                                                                               5
<PAGE>
                           Securities rated in the highest rating category by at
                     least two NRSROs (or, if unrated, determined by the Adviser
                     to be of comparable quality) are "first tier" securities.
                     Non-first tier securities rated in the second highest
                     rating category by at least one NRSRO (or, if unrated,
                     determined by the Adviser to be of comparable quality) are
                     considered to be "second tier" securities.
 
                           Although the Funds are governed by Rule 2a-7, their
                     investment policies are, in certain respects, more
                     restrictive than those imposed by that Rule.
 
                           Each Fund may invest up to 10% of its net assets in
                     illiquid securities. However, restricted securities,
                     including Rule 144A securities and Section 4(2) commercial
                     paper, that meet the criteria established by the Board of
                     Trustees of the Trust will be considered liquid. In
                     addition, each Fund may invest in U.S. Treasury STRIPS (as
                     defined in the "Description of Permitted Investments and
                     Risk Factors").
 
                           Each Fund may purchase securities on a when-issued
                     basis.
 
                           For temporary defensive purposes, the Funds may
                     maintain 100% of their assets in cash.
 
                           For a description of the permitted investments and
                     the above ratings see "Description of Permitted Investments
                     and Risk Factors" and the Statement of Additional
                     Information.
 
INVESTMENT
LIMITATIONS
        ________________________________________________________________________
 
                     The investment objectives and certain of the investment
                     limitations are fundamental policies of the Funds. It is a
                     fundamental policy of each Fund to use its best efforts to
                     maintain a constant net asset value of $1.00 per share.
                     There can be no assurance that any Fund will achieve its
                     investment objective, or that any Fund will be able to
                     maintain a net asset value of $1.00 per share on a
                     continuing basis.
 
                           Fundamental policies cannot be changed with respect
                     to the Trust or a Fund without the consent of the holders
                     of a majority of the Trust or that Fund's outstanding
                     shares.
 
                     EACH FUND MAY NOT:
 
                     1. Purchase securities of any issuer (except securities
                        issued or guaranteed by the U.S. Government, its
                        agencies or instrumentalities), if as a result, more
                        than 5% of the total assets of the Fund would be
                        invested in the securities of such issuer; provided,
                        however, that any Fund may invest up to 25% of its total
                        assets without regard to this restriction as permitted
                        by Rule 2a-7 under the 1940 Act.
 
                     2. Purchase any securities which would cause more than 25%
                        of the total assets of the Fund 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 apply to
                        investments in (a) domestic banks and (b) obligations
                        issued or guaranteed by the U.S. Government or its
                        agencies and instrumentalities.
 
                                                                               6
<PAGE>
                     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 that Fund. 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 the Fund makes additional investments and any
                        interest paid on such borrowings will reduce the income
                        of that Fund.
 
                     The foregoing percentage limitations (except the limitation
                     on borrowing) will apply at the time of the purchase of a
                     security. Additional fundamental and non-fundamental
                     investment limitations are set forth in the Statement of
                     Additional Information.
THE MANAGER
          ______________________________________________________________________
 
                     SEI Investments Fund Management (the "Manager" or the
                     "Transfer Agent") provides the Trust with overall
                     management services, regulatory reporting, all necessary
                     office space, equipment, personnel and facilities and acts
                     as transfer agent, dividend disbursing agent, and
                     shareholder servicing agent for the shares of each Fund.
 
                           For these services, the Manager is entitled to a fee,
                     which is calculated daily and paid monthly, at an annual
                     rate of each Fund's average daily net assets as follows:
                     Government II Fund--.19%; and Treasury II Fund--.24%. The
                     Manager is contractually obligated to waive up to all of
                     its fee and, if necessary, pay other operating expenses in
                     order to limit the total operating expenses of the Funds.
                     The Manager has also voluntarily agreed to waive up to all
                     of its fee in order to limit total operating expenses of
                     the Funds. The Manager reserves the right, in its sole
                     discretion, to terminate these voluntary waivers at any
                     time. For the fiscal year ended January 31, 1998, the
                     Government II and Treasury II Funds paid management fees,
                     after waivers, of .14% and .20%, respectively, of their
                     average daily net assets.
THE ADVISER
         _______________________________________________________________________
 
                     Wellington Management Company, LLP (the "Adviser" or "WMC")
                     serves as the investment adviser for each Fund under an
                     advisory agreement with the Trust. The Adviser is a
                     professional investment counseling firm which provides
                     investment services to investment companies, employee
                     benefit plans, endowments, foundations, and other
                     institutions and individuals. Under the advisory agreement,
                     the Adviser invests the assets of the Funds and
                     continuously reviews, supervises and administers each
                     Fund's investment program. The Adviser is independent of
                     the Manager and SEI and discharges its responsibilities
                     subject to the supervision of, and policies set by, the
                     Trustees of the Trust.
 
                           The Adviser and its predecessor organizations have
                     provided investment advisory services to investment
                     companies since 1928 and to investment counseling clients
                     since 1960. As of March 31, 1998, the Adviser had
                     discretionary management authority with respect to
                     approximately $193.9 billion of assets, including the
                     assets of the Trust and SEI
 
                                                                               7
<PAGE>
                     Liquid Asset Trust, each an open-end management investment
                     company administered by the Manager. The principal address
                     of the Adviser is 75 State Street, Boston, Massachusetts
                     02109. WMC is a Massachusetts limited liability partnership
                     whose managing partners are Robert W. Doran, Duncan M.
                     McFarland and John R. Ryan.
 
                           The Adviser is entitled to a fee, which is calculated
                     daily and paid monthly, at an annual rate of .075% of the
                     combined average daily net assets of the Funds of the Trust
                     up to $500 million and .02% of such combined average daily
                     net assets in excess of $500 million. Such fees are
                     allocated daily among the Funds on the basis of their
                     relative net assets. For the fiscal year ended January 31,
                     1998, each of the Funds paid the Adviser advisory fees,
                     after fee waivers, of .01% of their relative net assets.
 
DISTRIBUTION AND
SHAREHOLDER
SERVICING
      __________________________________________________________________________
 
                     SEI Investments Distribution Co. (the "Distributor"), a
                     wholly-owned subsidiary of SEI Investments Company, serves
                     as each Fund's distributor pursuant to a distribution
                     agreement (the "Distribution Agreement") with the Trust.
 
                           The Funds have adopted plans under which firms,
                     including the Distributor, that provide shareholder and
                     administrative services may receive compensation therefor.
                     The Class B and C plans differ in a number of ways,
                     including the amounts that may be paid. Under each plan,
                     the Distributor may provide those services itself or may
                     enter into arrangements under which third parties provide
                     such services and are compensated by the Distributor. Under
                     such arrangements the Distributor may retain as a profit
                     any difference between the fee it receives and the amount
                     it pays such third party. In addition, the Portfolios may
                     enter into such arrangements directly.
 
                           Under the Class B shareholder service plan, a Fund
                     will pay shareholder servicing fees at an annual rate of up
                     to .25% of its average daily net assets in return for the
                     Distributor's (or its agent's) efforts in maintaining
                     client accounts; arranging for bank wires; responding to
                     client inquiries concerning services provided or
                     investments; and assisting clients in changing dividend
                     options, account designations and addresses. In addition,
                     the Class B shares may pay administrative services fees at
                     a specified percentage of the average daily net assets of
                     the shares of the Class (up to .05%). Under the Class C
                     shareholder service plan, the Distributor is entitled to
                     receive shareholder servicing fees at an annual rate of up
                     to .25% of its average daily net assets in return for the
                     Distributor's (or its agent's) efforts in maintaining
                     client accounts; arranging for bank wires; responding to
                     client inquiries concerning services provided or
                     investments; and assisting clients in changing dividend
                     options, account designations and addresses. In addition,
                     the Class C shares may pay administrative services fees at
                     a specified percentage of the average daily net assets of
                     the shares of the Class (up to .25%). Administrative
                     services include providing sub-accounting; providing
                     information on share positions to clients; forwarding
 
                                                                               8
<PAGE>
                     shareholder communications to clients; processing purchase,
                     exchange and redemption orders; and processing dividend
                     payments.
 
                           It is possible that an institution may offer
                     different classes of shares to its customers and thus
                     receive compensation with respect to different classes.
                     These financial institutions may also charge separate fees
                     to their customers.
 
                           The Distributor may, from time to time and at its own
                     expense, provide promotional incentives, in the form of
                     cash or other compensation to certain financial
                     institutions whose representatives have sold or are
                     expected to sell significant amounts of the Portfolios'
                     shares.
 
PURCHASE AND
REDEMPTION OF SHARES
    ____________________________________________________________________________
 
                     Financial institutions may acquire shares of the Funds for
                     their own accounts, or as a record owner on behalf of
                     fiduciary, agency or custody accounts, by placing orders
                     with the Transfer Agent (or its authorized agent).
                     Institutions that use certain SEI proprietary systems may
                     place orders electronically through those systems.
                     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 the
                     Transfer Agent for effectiveness on the same day. Financial
                     institutions that purchase shares for the accounts of their
                     customers may impose separate charges on these customers
                     for account services.
 
                           Shares of each Fund may be purchased or redeemed on
                     days on which the New York Stock Exchange is open for
                     business ("Business Days"). However, money market fund
                     shares cannot be purchased by Federal Reserve wire on
                     Federal holidays restricting wire transfers.
 
                           Shareholders who desire to purchase shares with cash
                     must place their orders with the Transfer Agent (or its
                     authorized agent) prior to the determination of net asset
                     value and in accordance with the procedures described below
                     for the order to be accepted on that Business Day. Cash
                     investments must be transmitted or delivered in federal
                     funds to the wire agent by the close of business on the
                     same 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.
 
                           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, which
                     is expected to remain constant at $1.00. The net asset
                     value per share of a Fund is determined by dividing the
                     total value of its investments and other assets, less any
                     liabilities, by the total number of outstanding shares of
                     the Fund. A Fund's investments will be valued by the
                     amortized cost method described in the Statement of
                     Additional Information. Net asset value per share is
                     determined on each Business Day as of 2:00 p.m. Eastern
                     time on each Business Day for
 
                                                                               9
<PAGE>
                     the Government II Fund and 2:30 p.m. Eastern time on each
                     Business Day for the Treasury II Fund. Financial
                     institutions which purchase and redeem shares for the
                     accounts of their customers may impose their own cut-off
                     times for receipt of purchase and redemption requests
                     directed through them.
 
                           Shareholders who desire to redeem shares of a Fund
                     must place their redemption orders with the Transfer Agent
                     (or its authorized agent) prior to the determination of net
                     asset value and in accordance with the procedures described
                     below on any Business Day. The redemption price is the net
                     asset value per share of the Fund next determined after
                     receipt by the Transfer Agent of the redemption order.
                     Payment on redemptions will be made as promptly as possible
                     and, in any event, within seven days after the redemption
                     order is received.
 
                           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
          ______________________________________________________________________
 
                     For any Fund, the performance of Class B shares will
                     normally be higher than that of Class C shares because of
                     the additional administrative services expenses charged to
                     Class C shares.
 
                           From time to time, each Fund may advertise the
                     "current yield" and "effective yield" (also called
                     "effective compound yield"). These figures are based on
                     historical earnings and are not intended to indicate future
                     performance. No representation can be made concerning
                     actual future yields or returns. The "current yield" of a
                     Fund refers to the income generated by a hypothetical
                     investment in such Fund over a seven-day period (which
                     period will be stated in the advertisement). This income is
                     then "annualized," I.E., the income generated during that
                     week is assumed to be generated each week over a 52-week
                     period and is shown as a percentage of the investment. The
                     "effective yield" (also called "effective compound yield")
                     is calculated similarly but, when annualized, the income
                     earned by an investment in a Fund is assumed to be
                     reinvested. The "effective yield" will be slightly higher
                     than the "current yield" because of the compounding effect
                     of this assumed reinvestment.
 
                           Each Fund may periodically compare its performance to
                     that of: (i) other mutual funds tracked by mutual fund
                     rating services (such as Lipper Analytical) or financial
                     and
 
                                                                              10
<PAGE>
                     business publications and periodicals; (ii) broad groups of
                     comparable mutual funds; (iii) unmanaged indices which may
                     assume investment of dividends but generally do not reflect
                     deductions for administrative and management costs; or (iv)
                     to other investment alternatives. Each Fund may also quote
                     financial and business publications and periodicals as they
                     relate to fund management, investment philosophy and
                     investment techniques.
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
                     Funds or their shareholders. In addition, state and local
                     tax consequences of an investment in the Fund may differ
                     from the federal income tax consequences described below.
                     Accordingly, shareholders are urged to consult their tax
                     advisers regarding specific questions as to federal, state
                     and local income taxes. Additional information concerning
                     taxes is set forth in the Statement of Additional
                     Information.
TAX STATUS
OF THE FUNDS
                     Each Fund is treated as a separate entity for federal
                     income tax purposes and is not combined with the Trust's
                     other portfolios. Each Fund intends to qualify or to
                     continue to qualify for the special tax treatment afforded
                     regulated investment companies ("RICs") under Subchapter M
                     of the Internal Revenue Code of 1986, as amended (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 gains over net
                     short-term capital losses) distributed to shareholders.
TAX STATUS
OF DISTRIBUTIONS
                     Each Fund distributes substantially all of its net
                     investment income (including net short-term capital gains)
                     to shareholders. Dividends from a Fund's net investment
                     company taxable income are taxable to its shareholders as
                     ordinary income (whether received in cash or in additional
                     shares) and will not qualify for the corporate dividends
                     received deduction. Distributions of net capital gains are
                     taxable to shareholders as long-term capital gains,
                     regardless of how long shareholders have held their shares
                     and regardless of whether the distributions are received in
                     cash or in additional shares. The Funds provide annual
                     reports to shareholders of the federal income tax status of
                     all distributions.
 
                           Dividends declared by a Fund 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 Fund and received by the shareholders on December 31
                     of the year declared if paid by the Fund at any time during
                     the following January.
 
                           Income received on direct U.S. Government obligations
                     is exempt from tax at the state level when received
                     directly by a Fund and may be exempt, depending on the
                     state, when received by a shareholder from a Fund provided
                     certain state-specific conditions are satisfied. Interest
                     received on repurchase agreements collateralized by U.S.
                     Government obligations normally is not exempt from state
                     taxation. Each Fund will inform shareholders annually of
                     the percentage of income and distributions derived from
                     direct U.S.
 
                                                                              11
<PAGE>
                     Government obligations. Shareholders should consult their
                     tax advisers to determine whether any portion of the income
                     dividends received from a Fund is considered tax exempt in
                     their particular states.
 
                           With respect to investments in U.S. Treasury STRIPS,
                     which are sold at original issue discount and thus do not
                     make periodic cash interest payments, each Fund will be
                     required to include as part of its current income the
                     accreted interest on any such obligations even though the
                     Fund has not received any interest payments on such
                     obligations during that period. Because the Fund
                     distributes all of its net investment income to its
                     shareholders, a Fund may have to sell portfolio securities
                     to distribute such imputed income, which may occur at a
                     time when the Adviser would not have chosen to sell such
                     securities, and which may result in a taxable gain or loss.
 
                           Each Fund intends to make sufficient distributions
                     prior to the end of each calendar year to avoid liability
                     for the federal excise tax applicable to RICs.
 
                           Each sale, exchange, or redemption of Fund 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 15, 1982. The
                     Declaration of Trust permits the Trust to offer separate
                     portfolios of shares and different classes of each
                     portfolio. In addition to the Funds, the Trust consists of
                     the following portfolios: Money Market Fund, Prime
                     Obligation Fund, Government Fund, Treasury Fund, Federal
                     Securities Fund, Short-Duration Government Fund,
                     Intermediate-Duration Government Fund, GNMA Fund, Corporate
                     Daily Income Fund and Treasury Securities Daily Income
                     Fund. All consideration received by the Trust for shares of
                     any portfolio and all assets of such portfolio belong to
                     that portfolio and would be subject to 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 state and federal securities
                     laws, pricing, insurance expenses, litigation and other
                     extraordinary expenses, brokerage costs, interest charges,
                     taxes and organization expenses.
TRUSTEES OF THE TRUST
                     The management and affairs of the Trust are supervised by
                     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 Fund or class will vote
                     separately on matters relating solely to that Fund or
                     class. 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
 
                                                                              12
<PAGE>
                     removed by the remaining Trustees or by shareholders at a
                     special meeting called upon written request of shareholders
                     owning at 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 an unaudited report semi-annually and
                     audited financial statements annually. The Trust furnishes
                     proxy statements and other reports to shareholders of
                     record.
SHAREHOLDER INQUIRIES
                     Shareholder inquiries should be directed to the Manager,
                     SEI Investments Fund Management, Oaks, Pennsylvania 19456.
DIVIDENDS
                     Substantially all of the net investment income (exclusive
                     of capital gains) of each Fund is distributed in the form
                     of dividends that are declared on each Business Day, as a
                     dividend for shareholders of record and are distributed
                     monthly in federal funds or in additional shares at the
                     discretion of the shareholder on the first Business Day of
                     each month. Dividends will be paid on the next Business Day
                     to Shareholders who redeem all of their shares of a Fund at
                     any other time during the month. The dividends on Class B
                     shares are normally higher than those on Class C shares of
                     each Fund because of the additional administrative services
                     expenses charged to Class C shares.
COUNSEL AND INDEPENDENT
PUBLIC ACCOUNTANTS
                     Morgan, Lewis & Bockius LLP serves as counsel to the Trust.
                     Arthur Andersen LLP serves as the independent public
                     accountants of the Trust.
CUSTODIAN AND WIRE AGENT
                     First Union National Bank, Broad and Chestnut Streets, P.O.
                     Box 7618, Philadelphia, Pennsylvania 19101 (the
                     "Custodian") serves as custodian and wire agent of the
                     assets of the Government II and Treasury II Funds. The
                     Custodian holds cash, securities and other assets of the
                     Trust as required by the 1940 Act.
 
                                                                              13
<PAGE>
DESCRIPTION OF
PERMITTED
INVESTMENTS AND RISK
FACTORS   ______________________________________________________________________
 
                     The following is a description of certain of the permitted
                     investment practices for the Portfolios and the associated
                     risk factors:
DEMAND INSTRUMENTS
                     Certain instruments may entail a demand feature which
                     permits the holder to demand payment of the principal
                     amount of the instrument. Demand instruments may include
                     variable rate master demand notes.
ILLIQUID SECURITIES
                     Illiquid securities are securities which cannot be disposed
                     of within seven business days at approximately the price at
                     which they are being carried on a Fund's books. Illiquid
                     securities include demand instruments with a demand notice
                     periods exceeding seven days, securities for which there is
                     no active secondary market, and repurchase agreements with
                     maturities of more than seven days in length.
U.S. GOVERNMENT AGENCY
SECURITIES
                     Obligations issued or guaranteed by agencies of the U.S.
                     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 U.S. 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 securities), others are
                     supported by the right of the issuer to borrow from the
                     Treasury (E.G., Federal Farm Credit Bank securities), while
                     still others are supported only by the credit of the
                     instrumentality (E.G., Fannie Mae securities). Guarantees
                     of principal by agencies or instrumentalities of the U.S.
                     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 Fund's shares.
U.S. TREASURY
OBLIGATIONS
                     U.S. Treasury obligations consist of bills, notes and bonds
                     issued by the U.S. Treasury, as well as separately traded
                     interest and principal component parts of such obligations
                     known as Separately Traded Registered Interest and
                     Principal Securities ("STRIPS") that are transferable
                     through the federal book-entry system.
U.S. TREASURY STRIPS
                     STRIPS are sold as zero coupon securities which means that
                     they are sold at a substantial discount and redeemed at
                     face value at their maturity date without interim cash
                     payments of interest or principal. This discount is
                     accreted over the life of the security, and such accretion
                     will constitute the income earned on the security for both
                     accounting and tax purposes. Because of these features,
                     such securities may be subject to greater interest rate
                     volatility than interest-paying investments.
 
                                                                              14
<PAGE>
VARIABLE AND FLOATING
RATE INSTRUMENTS
                     Certain obligations may carry variable or floating rates of
                     interest, and may involve a conditional or unconditional
                     demand feature. Such instruments bear interest at rates
                     which are not fixed, but which vary with changes in
                     specified market rates or indices. The interest rates on
                     these securities may be reset daily, weekly, quarterly or
                     some other reset period, and may have a floor or ceiling on
                     interest rate changes.
WHEN-ISSUED AND DELAYED
DELIVERY SECURITIES
                     When-issued or delayed delivery transactions involve the
                     purchase of an instrument with payment and delivery taking
                     place in the future. Delivery of and payment for these
                     securities may occur a month or more after the date of the
                     purchase commitment. A Fund will maintain with the
                     Custodian a separate account with liquid 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 a Fund before
                     settlement.
TABLE OF CONTENTS
               _________________________________________________________________
 
<TABLE>
<S>                                                                         <C>
Annual Operating Expenses.................................................     2
Financial Highlights......................................................     4
The Trust.................................................................     5
Investment Objectives and Policies........................................     5
General Investment Policies...............................................     5
Investment Limitations....................................................     6
The Manager...............................................................     7
The Adviser...............................................................     7
Distribution and Shareholder Servicing....................................     8
Purchase and Redemption of Shares.........................................     9
Performance...............................................................    10
Taxes.....................................................................    11
General Information.......................................................    12
Description of Permitted Investments and Risk Factors.....................    14
</TABLE>
 
                                                                              15


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