SEI CASH & PLUS TRUST
497, 1996-04-01
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<PAGE>   1
 
SEI DAILY INCOME TRUST
APRIL 1, 1996
- --------------------------------------------------------------------------------
GOVERNMENT PORTFOLIO
- --------------------------------------------------------------------------------
 
Please read this Prospectus carefully before investing, and keep it on file for
future reference.
 
A Statement of Additional Information dated May 31, 1995, as amended has been
filed with the Securities and Exchange Commission and is available 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 Daily Income Trust (the "Trust") is a mutual fund 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. Some portfolios offer separate classes of
units of beneficial interest ("shares") that differ from each other primarily in
the allocation of certain distribution expenses. This Prospectus offers Class G
shares (formerly Class C shares) of the Government Portfolio (the "Portfolio").
 
AN INVESTMENT IN THE PORTFOLIO IS NEITHER INSURED NOR GUARANTEED BY THE U.S.
GOVERNMENT, AND THERE CAN BE NO ASSURANCE THAT THE PORTFOLIO WILL BE ABLE TO
MAINTAIN A STABLE NET ASSET VALUE OF $1.00 PER SHARE.
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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
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>   2
 
ANNUAL OPERATING EXPENSES (as a percentage of average net assets)        CLASS G
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<TABLE>
<S>                                                                                                       <C>    <C>
Management/Advisory Fees (after fee waiver) (1)                                                                    .12%
12b-1 Fees (after fee waiver)(2)                                                                                   .44%
Total Other Expenses                                                                                               .29%
    Shareholder Service Fees                                                                              .25%
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Total Operating Expenses (after fee waiver) (3)                                                                    .85%
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</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 would be .27%
    for the Portfolio.
(2)  The maximum 12b-1 fees payable by Class G shares of the Portfolios are
    .50%.
(3)  Absent the voluntary fee waivers described above, total operating expenses
    for the Class G shares of the Portfolio would be 1.06%.
 
EXAMPLE
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<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) 5%
  annual return and (2) redemption at the end of each time period:
    Government Portfolio                                                                $9        $27        $47        $105
- ---------------------------------------------------------------------------------------------------------------------
</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 G 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 Class G
shares. Additional information may be found under "The Manager and Shareholder
Servicing Agent," "The Adviser" and "Distribution." Long-term shareholders may
eventually pay more than the economic equivalent of the maximum front-end sales
charges otherwise permitted by the NASD Rules.
 
                                       2
<PAGE>   3
 
FINANCIAL HIGHLIGHTS
 
The following information has been audited by Arthur Andersen LLP, the Trust's
independent accountants, as indicated in their report dated March 8, 1995 on the
Trust's financial statements as of January 31, 1995 included in the Trust's
Statement of Additional Information under "Financial Information." Additional
performance information is set forth in the 1995 Annual Report to shareholders
and is available upon request and without charge by calling 1-800-342-5734.
FOR A CLASS G SHARE OUTSTANDING THROUGHOUT THE PERIOD**
 
<TABLE>
<CAPTION>
                                                                                                 Government Portfolio
                                                                                                 --------------------
                                                                                                   For fiscal year
                                                                                                        ended
                                                                                                     January 31,
                                                                                                 --------------------
                                                                                                       1995(1)
<S>                                                                                              <C>
- ---------------------------------------------------------------------------------------------------------------------
Net Asset Value, Beginning of Period                                                                  $     1.00
- ---------------------------------------------------------------------------------------------------------------------
Income from Investment Operations:
      Net Investment Income                                                                                 0.03
      Net Realized and Unrealized Gains (Losses) on Securities                                         --
- ---------------------------------------------------------------------------------------------------------------------
Total from Investment Operations                                                                      $     0.03
- ---------------------------------------------------------------------------------------------------------------------
Less Distributions:
      Dividends from Net Investment Income                                                                 (0.03)
      Distributions from Realized Capital Gains                                                        --
- ---------------------------------------------------------------------------------------------------------------------
Total Distributions                                                                                   $    (0.03)
- ---------------------------------------------------------------------------------------------------------------------
Net Asset Value, End of Period                                                                        $     1.00
- ---------------------------------------------------------------------------------------------------------------------
- ---------------------------------------------------------------------------------------------------------------------
Total Return                                                                                             3.41%(2)
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- ---------------------------------------------------------------------------------------------------------------------
Ratios/Supplemental Data:
      Net Assets End of Period (000)                                                                  $  310,835
      Ratio of Expenses to Average Net Assets                                                              0.70%
      Ratio of Expenses to Average Net Assets (Excluding Waivers)                                          0.89%
      Ratio of Net Investment Income to Average Net Assets                                                 4.32%
      Ratio of Net Investment Income to Average Net Assets (Excluding Waivers)                              4.13
- ---------------------------------------------------------------------------------------------------------------------
- ---------------------------------------------------------------------------------------------------------------------
</TABLE>
 
(1)  The Class C shares of the Portfolio were first offered April 7, 1994. All
    ratios have been annualized.
(2)  Returns are for the period indicated and have not been annualized.
**  Financial information presented here reflects the performance and ratios of
    Class C shares of the Portfolio. The Trust's board of trustees has approved
    the conversion of Class C shares of the Portfolio into Class G shares. Class
    G shares are subject to different fees and expenses than Class C shares.
 
                                       3
<PAGE>   4
 
THE TRUST
 
SEI DAILY INCOME TRUST (the "Trust") is a diversified open-end management
investment company that offers units of beneficial interest ("shares") in
separate investment portfolios. This Prospectus offers Class G shares of the
Trust's Government Portfolio (the "Portfolio.") The Portfolio has separate
classes of shares which provide for variations in distribution, shareholder
service and transfer agent costs, voting rights and dividends. Additional
information pertaining to the Trust may be obtained from SEI Financial Services
Company, 680 East Swedesford Road, Wayne, PA 19087 or by calling 1-800-342-5734.
 
INVESTMENT
OBJECTIVE AND
POLICIES
 
                      The Government Portfolio seeks to preserve principal value
                      and maintain a high degree of liquidity while providing
                      current income. Under normal conditions the Portfolio
                      invests exclusively in U.S. Treasury obligations,
                      obligations issued or guaranteed as to principal and
                      interest by the agencies or instrumentalities of the U.S.
                      Government, and repurchase agreements involving such
                      obligations.
 
GENERAL
INVESTMENT
POLICIES
 
                      The Portfolio complies with regulations of the Securities
                      and Exchange Commission applicable to money market funds,
                      as amended effective June 1, 1991. These regulations
                      impose certain quality, maturity and diversification
                      restraints on investments by the Portfolio. These
                      regulations generally require money market funds to
                      acquire only U.S. dollar denominated obligations maturing
                      in 397 days or less. Under these regulations, the
                      Portfolio will maintain an average maturity on a
                      dollar-weighted basis of 90 days or less. For a
                      description of certain of these restraints, see
                      "Description of Permitted Investments and Risk Factors."
                            The Portfolio may invest up to 10% of its net assets
                      in illiquid securities, including illiquid restricted
                      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, the
                      Portfolio may invest in STRIPS (as defined in the
                      "Description of Permitted Investments and Risk Factors").
                            The Portfolio may purchase securities on a
                      when-issued basis.
                            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.
 
                                       4
<PAGE>   5
 
INVESTMENT
LIMITATIONS
 
                      The investment objective and certain investment
                      limitations are fundamental policies of the Portfolio. It
                      is a fundamental policy of the Portfolio to use its best
                      efforts to maintain a constant net asset value of $1.00
                      per share. There can be no assurance that the investment
                      objective of the Portfolio will be met or that the
                      Portfolio 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 Portfolio without the consent of the holders of a
                      majority of the Portfolio's outstanding shares.
 
                      The Portfolio 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 total assets of the Portfolio would be
                         invested in the securities of such issuer; provided,
                         however, that the Portfolio may invest up to 25% of its
                         total assets without regard to this restriction as
                         permitted by Rule 2a-7 under the Investment Company Act
                         of 1940, as amended (the "1940 Act").
                      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 apply to
                         investments in (a) domestic banks and (b) obligations
                         issued or guaranteed by the U.S. Government or its
                         agencies and instrumentalities; provided.
                      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 income of the Portfolio.
                      The foregoing percentage limitations will apply at the
                      time of the purchase of a security. Additional fundamental
                      and nonfundamental investment limitations are set forth in
                      the Statement of Additional Information.
THE MANAGER
 
                      SEI Financial Management Corporation (the "Manager" and
                      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.
 
                                       5
<PAGE>   6
 
                            For these services, the Manager is entitled to a fee
                      which is calculated daily and paid monthly at an annual
                      rate of .24% of the Portfolio's average daily net assets.
                      The Manager has voluntarily agreed to waive all or a
                      portion of its fee in order to limit the total operating
                      expenses to not more than .85% of the daily net assets of
                      Class G shares of the Portfolio, on an annualized basis.
                      The Manager reserves the right, in its sole discretion, to
                      terminate this voluntary waiver at any time.
 
THE ADVISER
 
                      Wellington Management Company ("WMC" or the "Adviser")
                      acts as the investment adviser for the Portfolio under an
                      advisory agreement (the "Advisory Agreement") with the
                      Trust. WMC 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 is responsible for the
                      investment decisions for the Portfolio and continuously
                      reviews, supervises and administers the Portfolio'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's predecessor organizations have
                      provided investment advisory services to investment
                      companies since 1933 and to investment counseling clients
                      since 1960. As of September 30, 1995, the Adviser had
                      discretionary management authority with respect to
                      approximately $102.4 billion of assets, including the
                      assets of the Trust, SEI Liquid Asset Trust and the
                      Insurance Investment Products Trust, each an open-end
                      investment company. Wellington Trust Company, National
                      Association, a wholly-owned subsidiary of the Adviser,
                      utilizes SEI's trust accounting services. The principal
                      address of Wellington Management Company is 75 State
                      Street, Boston, MA 02109. WMC is a Massachusetts general
                      partnership, of which the following persons are managing
                      partners: Robert W. Doran, Duncan M. McFarland and John B.
                      Neff.
                            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
                      Portfolios 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
                      Portfolios on the basis of their relative net assets. For
                      the fiscal year ended January 31, 1995, the Portfolio paid
                      the Adviser advisory fees (shown here as a percentage of
                      average daily net assets after voluntary fee waivers) of
                      .01%.
 
DISTRIBUTION AND
SHAREHOLDER
SERVICES
 
                      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"). Each Class of each Portfolio
                      has a separate distribution plan ("Class A Plan,"
 
                                       6
<PAGE>   7
 
                      "Class B Plan," "Class C Plan" and "Class G Plan";
                      collectively, the "Plans") pursuant to Rule 12b-1 under
                      the 1940 Act. The Trust may also execute brokerage or
                      other agency transactions through the Distributor for
                      which the Distributor may receive usual and customary
                      compensation.
                            The Class G Plan provides for payments to the
                      Distributor at an annual rate of up to .50% of the
                      Portfolio's average daily net assets attributable to Class
                      G shares. These payments are characterized as
                      "compensation" and are not directly tied to expenses
                      incurred by the Distributor; the payments the Distributor
                      receives during any year may therefore be higher or lower
                      than its actual expenses. These additional payments may be
                      used to compensate Class G shareholders that provide
                      distribution related services to their customers. Class G
                      shares are also subject to a shareholder servicing fee of
                      up to .25% of the average daily net assets of the Class G
                      shares of the Portfolio. This shareholder servicing fee
                      may be used for personal service and maintenance of
                      shareholder accounts.
                            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. Certain financial institutions
                      offering shares to their customers may be required to
                      register as dealers pursuant to state laws.
                            The Distributor may, from time to time in its sole
                      discretion, institute one or more promotional incentive
                      programs, which will be paid 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 Portfolios. Such promotional
                      incentives will be offered uniformly to all dealers and
                      predicated upon the amount of shares of the Portfolios
                      sold by the dealer.
 
PURCHASE AND
REDEMPTION OF
SHARES
 
                      Financial institutions may acquire shares of the Portfolio
                      for their own accounts 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
                      the Transfer Agent for effectiveness 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 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, money market
 
                                       7
<PAGE>   8
 
                      fund shares can not 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 prior to
                      the determination of net asset value 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 the Portfolio is determined by
                      dividing the total value of its investments and other
                      assets, less any liabilities, by the total outstanding
                      shares of the Portfolio. A Portfolio's investments will be
                      valued by the amortized cost method described in the
                      Statement of Additional Information. Net asset value per
                      share is determined daily as of 3:00 p.m. Eastern time on
                      each Business Day. 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 the
                      Portfolio must place their redemption orders with the
                      Transfer Agent prior to the determination of net asset
                      value 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. For redemption orders received before the cut-off
                      time on any Business Day, payment will be made the same
                      day by transfer of federal funds. Otherwise, the
                      redemption order will be effective on the next Business
                      Day.
                            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, and you
                      experience difficulties placing redemption orders by
                      telephone, you may wish to consider placing your order by
                      other means.
PERFORMANCE
 
                      For any Portfolio, the performance of Class A shares will
                      normally be higher than that of Class B shares because of
                      the additional distribution expenses charged to Class B
                      shares. Likewise, the performance on Class B shares will
                      normally be higher than that of Class C or
 
                                       8
<PAGE>   9
 
                      Class G shares because of the additional distribution
                      expenses charged to Class C shares and the additional
                      distribution and shareholder servicing expenses charged to
                      Class G shares.
                            From time to time, the Portfolio 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 the Portfolio refers to the income generated by
                      a hypothetical investment in such Portfolio 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 the Portfolio 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.
                            The Portfolio may periodically compare its
                      performance to that of other mutual funds tracked by
                      mutual fund rating services (such as Lipper Analytical) or
                      financial and business publications and periodicals, broad
                      groups of comparable mutual 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
                      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
                      Portfolio or its shareholders. Accordingly, shareholders
                      are urged to consult their tax advisers regarding specific
                      questions as to federal, state and local income 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 Portfolios     The Portfolio is treated as a separate entity for federal
                      income tax purposes and is not combined with the Trust's
                      other portfolios. The Portfolio 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 (the "Code"), as
                      amended, 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.
                      The Portfolio also intends to distribute sufficient
                      amounts each calendar year to avoid liability for federal
                      excise tax.
 
                                       9
<PAGE>   10
 
Tax Status
of Distributions      The Portfolio distributes substantially all of its net
                      investment income (including net short-term capital gains)
                      to shareholders. Dividends from 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. The Portfolio
                      provides annual reports to shareholders of the federal
                      income tax status of all distributions.
                            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.
                            Income received on direct U.S. Government
                      obligations is exempt from tax at the state level when
                      received directly and may be exempt, depending on the
                      state, when received by a shareholder from a Portfolio
                      provided certain conditions are satisfied. Interest
                      received on repurchase agreements collateralized by U.S.
                      Government obligations normally is not exempt from state
                      taxation. The Portfolio will inform shareholders annually
                      of the percentage of income and distributions derived from
                      direct U.S. Government obligations. Shareholders should
                      consult their tax advisers to determine whether any
                      portion of the income dividends received from the
                      Portfolio is considered tax exempt in their particular
                      states.
                            With respect to investments in STRIPS, which are
                      sold at original issue discount and thus do not make
                      periodic cash interest payments, the Portfolio will be
                      required to include as part of its current income the
                      accreted interest on any such obligations even though the
                      Portfolio has not received any interest payments on such
                      obligations during that period. Because the Portfolio
                      distributes all of its net investment income to its
                      shareholders, the Portfolio 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 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 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 Portfolio, the Trust
                      consists of the following portfolios: Money Market
                      Portfolio, Prime Obligation Portfolio, Government II
                      Portfolio, Treasury Portfolio, Treasury II Portfolio,
                      Federal Securities Portfolio, Short-Term Government
                      Portfolio, Intermediate-Term Government Portfolio, GNMA
                      Portfolio, Short-Term Mortgage Portfolio (formerly
                      Adjustable Rate Mortgage Portfolio) Short Duration
                      Mortgage Portfolio, Corporate Daily Income Portfolio and
                      Government Securities Daily Income Portfolio. All
                      consideration received by the Trust for
 
                                       10
<PAGE>   11
 
                      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 Portfolio or class will
                      vote separately on matters relating solely to that
                      Portfolio 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 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 unaudited financial information
                      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 Financial Management Corporation, 680 E. Swedesford
                      Road, Wayne, PA 19087.
 
Dividends             Substantially all of the net investment income (exclusive
                      of capital gains) of the Portfolio is distributed in the
                      form of monthly dividends. The dividends are determined
                      and declared as a dividend for shareholders of record on
                      the close of business on that day. Dividends are paid by
                      the Portfolio in federal funds or in additional shares at
                      the discretion of the shareholder on the first Business
                      Day of each month. The dividends on Class A shares are
                      normally higher than those on Class B shares of each
                      Portfolio because of the additional distribution expenses
                      charged to Class B shares. The dividends on Class B shares
                      are normally higher than those on Class C and Class G
                      shares of each Portfolio because of the additional
                      distribution and/or shareholder servicing expenses charged
                      to Class C and Class G shares.
 
Counsel and Independent
Accountants           Morgan, Lewis & Bockius LLP serves as counsel to the
                      Trust. Arthur Andersen LLP serves as the independent
                      public accountants of the Trust.
 
Custodians
and Wire Agent        CoreStates Bank, N.A., Broad and Chestnut Streets, P.O.
                      Box 7618, Philadelphia, PA 19101 (the "Custodian"), acts
                      as custodian of the assets of the Portfolio, and as wire
                      agent of the Trust. The Custodian holds cash, securities
                      and other assets of the Trust as required by the 1940 Act.
 
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<PAGE>   12
 
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:
 
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 Portfolio'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 maturities over seven days in
                      length.
 
Repurchase Agreements Repurchase agreements are agreements by which a Portfolio
                      obtains a security and simultaneously commits to return
                      the security to the seller at an agreed upon price on an
                      agreed upon date within a number of days from the date of
                      purchase. The Custodian will hold the security as
                      collateral for the repurchase agreement. A Portfolio bears
                      a risk of loss in the event the other party defaults on
                      its obligations and the Portfolio is delayed or prevented
                      from exercising its rights to dispose of the collateral or
                      if the Portfolio realizes a loss on the sale of the
                      collateral. A 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.
 
Restraints on
Investments by
Money Market Funds    Investments by a money market fund are subject to
                      limitations imposed under regulations adopted by the
                      Securities and Exchange Commission. These regulations
                      generally require money market funds to acquire only U.S.
                      dollar denominated obligations maturing in 397 days or
                      less and to maintain a dollar-weighted average portfolio
                      maturity of 90 days or less. In addition, money market
                      funds may acquire only obligations that present minimal
                      credit risk and that are "eligible securities," which
                      means they are (i) rated, at the time of investment, by at
                      least two nationally recognized statistical rating
                      organizations (one if it is the only organization rating
                      such obligation) in the highest short-term rating category
                      or, if unrated, determined to be of comparable quality (a
                      "first tier security"), or (ii) rated according to the
                      foregoing criteria in the second highest rating category
                      or, if unrated, determined to be of comparable quality
                      ("second tier security"). A security is not considered to
                      be unrated if its issuer has outstanding obligations of
                      comparable priority and security that have a short-term
                      rating. In the case of taxable money market funds,
                      investments in second tier securities are subject to the
                      further constraints that (i) no more than 5% of a
                      Portfolio's assets may be invested in second tier
                      securities, and (ii) any investment in securities of any
                      one issuer is limited to the greater of 1% of the
                      Portfolio's total assets or $1 million. A taxable money
                      market fund may also hold more than 5% of its total assets
                      in the first tier securities of a single issuer for three
                      business days.
 
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<PAGE>   13
 
U.S. Government Agencies
                      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
                      Corporations, 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), others are
                      supported by the right of the issuer to borrow from the
                      Treasury (e.g., Federal Farm Credit Bank), while 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 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 Portfolio's shares.
 
U.S. Treasury
Obligations           U.S. treasury obligations consist of bills, notes and
                      bonds issued by the U.S. Treasury and separately traded
                      interest and principal component parts of such obligations
                      that are transferable through the Federal book-entry
                      system known as Separately Traded Registered Interest and
                      Principal Securities ("STRIPS").
 
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 securities. See also
                      "Taxes."
 
When-Issued and Delayed
Delivery Securities   When-issued or delayed delivery basis 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 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 a 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 a Portfolio generally
                      purchases securities on a when-issued or forward
                      commitment basis with the intention of actually acquiring
                      securities, a Portfolio may dispose of a when-issued
                      security or forward commitment prior to settlement if it
                      deems appropriate.
 
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<PAGE>   14
 
TABLE OF CONTENTS
- --------------------------------------------------------------------------------
 
<TABLE>
<S>                                         <C>
Expense Summary.............................       2
Financial Highlights........................       3
The Trust...................................       4
Investment Objectives and Policies..........       4
General Investment Policies.................       4
Investment Limitations......................       5
The Manager.................................       5
The Adviser.................................       6
Distribution and Shareholder Services.......       6
Purchase and Redemption of Shares...........       7
Performance.................................       8
Taxes.......................................       9
General Information.........................      10
Description of Permitted Investments and
  Risk Factors..............................      12
</TABLE>
 
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