PAINEWEBBER MANAGED INVESTMENTS TRUST
485APOS, 1996-06-03
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       As filed with the Securities and Exchange Commission on June 3, 1996
    

                                              1933 Act Registration No. 2-91362
                                              1940 Act Registration No. 811-4040

                       SECURITIES AND EXCHANGE COMMISSION
                             Washington, D.C. 20549

                                    FORM N-lA

REGISTRATION STATEMENT UNDER THE SECURITIES ACT OF 1933      [  X  ]

     Pre-Effective Amendment No.            [     ]
   
     Post-Effective Amendment No. 42        [  X  ]
    
REGISTRATION STATEMENT UNDER THE INVESTMENT COMPANY ACT OF 1940 [  X  ]
   
     Amendment No.  37  
    
                        (Check appropriate box or boxes.)

                      PAINEWEBBER MANAGED INVESTMENTS TRUST
               (Exact name of registrant as specified in charter)

                           1285 Avenue of the Americas
                            New York, New York 10019
                    (Address of principal executive offices)

        Registrant's telephone number, including area code: (212)713-2000

                            DIANNE E. O'DONNELL, Esq.
                     Mitchell Hutchins Asset Management Inc.
                           1285 Avenue of the Americas
                            New York, New York 10019
                     (Name and address of agent for service)

                                   Copies to:
                             ELINOR W. GAMMON, Esq.
                           Kirkpatrick & Lockhart LLP
                         1800 Massachusetts Avenue, N.W.
                                    2nd Floor
                           Washington, D.C. 20036-1800
                            Telephone: (202)778-9000

        It is proposed that this filing will become effective:

        Immediately upon filing pursuant to Rule 485(b)
        On              , 1996 pursuant to Rule 485(b)
   
 X      60 days after filing pursuant to Rule 485(a)(i)
    
        On              , 1996 pursuant to Rule 485(a)(i)
        75 days after filing pursuant to Rule 485(a)(ii)
        On              , 1996 pursuant to Rule 485(a)(ii)
   
        Registrant has filed a declaration pursuant to Rule 24f-2 under the
Investment Company Act of 1940 and filed the notice required by such Rule for
the most recent fiscal year of the four series that are the subject of this
post-effective amendment on January 26, 1996.
    



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                      PaineWebber Managed Investments Trust

                       Contents of Registration Statement


This registration statement consists of the following papers and documents.


Cover Sheet

Contents of Registration Statement

Cross Reference Sheets
   

Class Y shares of:
    

   
PaineWebber U.S. Government Income Fund
PaineWebber Low Duration U.S. Government Income Fund
PaineWebber Investment Grade Income Fund
PaineWebber High Income Fund
    

Part A - Prospectus
Part B - Statement of Additional Information
Part C- Other Information

Signature Page

Exhibits

   
This Post-Effective Amendment is filed to add Class Y shares of PaineWebber
Investment Grade Income Fund and PaineWebber High Income Fund to the prospectus
and statement of additional information for the Class Y shares of PaineWebber
U.S. Government Income Fund and PaineWebber Low Duration U.S. Government Income
Fund. These four Funds are all series of PaineWebber Managed Investments Trust.
This Post-Effective Amendment does not make any changes in the currently
effective prospectuses and statements of additional information for the Class A,
B and C shares of these Funds or for any other series of PaineWebber Managed
Investments Trust.
    

                                      - 2 -

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                     PaineWebber Managed Investments Trust:
 
                               Class Y shares of:

                     PaineWebber U.S. Government Income Fund
              PaineWebber Low Duration U.S. Government Income Fund
   
                    PaineWebber Investment Grade Income Fund
                          PaineWebber High Income Fund
    
                         Form N-1A Cross Reference Sheet



<TABLE>
<CAPTION>
             Part A Item No. and Caption                Prospectus Caption

<S>          <C>                                        <C> 
1.           Cover Page..............                   Cover Page

2.           Synopsis................                   Fund Expenses

3.           Condensed Financial                        Financial Highlights; Performance Information
             Information.............

4.           General Description of                     Investment Objectives and Policies; General
             Registrant..............                   Information

5.           Management of the Fund..                   Management; General Information

6.           Capital Stock and other                    Cover Page; Dividends and Taxes; General
             Securities..............                   Information

7.           Purchase of Securities                     Purchases; Valuation of Shares; Management
             Being Offered...........

8.           Redemption or                              Redemptions
             Repurchase..............

9.           Legal Proceedings.......                   Not Applicable



             Part B Item No.                            Statement of Additional
             and Caption                                Information Caption    

10.          Cover Page..............                   Cover Page

11.          Table of Contents.......                   Table of Contents

12.          General Information and                    Other Information
             History.............

13.          Investment Objectives and                  Investment Policies and Restrictions; Hedging and
             Policies............                       Related Income Strategies; Portfolio Transactions

14.          Management of the                          Trustees and Officers
             Registrant..............

</TABLE>

                                      - 3 -

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<TABLE>

<S>          <C>                                        <C>
15.          Control Persons and Principal Holders      Trustees and Officers
             of Securities..............

16.          Investment Advisory and Other              Investment Advisory and Distribution Arrangements;
             Services..........                         Other Information

17.          Brokerage Allocation....                   Portfolio Transactions

18.          Capital Stock and Other                    Other Information
             Securities..............

19.          Purchase, Redemption and Pricing of        Valuation of Shares
             Securities Being Offered......

20.          Tax Status..............                   Taxes

21.          Underwriters............                   Investment Advisory and Distribution Arrangements

22.          Calculation of Performance                 Performance Information
             Data....................

23.          Financial Statements....                   Financial Statements

</TABLE>

Part C

        Information required to be included in Part C is set forth under the
appropriate item, so numbered, in Part C of this Registration Statement.


                                      - 4 -

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                    PAINEWEBBER U.S. GOVERNMENT INCOME FUND
                    PAINEWEBBER LOW DURATION U.S. GOVERNMENT
                                  INCOME FUND
                    PAINEWEBBER INVESTMENT GRADE INCOME FUND
                          PAINEWEBBER HIGH INCOME FUND
                                 CLASS Y SHARES
             1285 AVENUE OF THE AMERICAS, NEW YORK, NEW YORK 10019
                          PROSPECTUS -- JULY   , 1996
    
 
- --------------------------------------------------------------------------------
 
    Professional Management
    Portfolio Diversification
    Dividend and Capital Gain Reinvestment
    Low Minimum Investment
    Suitable for Retirement Plans
 
   
PAINEWEBBER  U.S. GOVERNMENT INCOME  FUND ('U.S. Government  Income Fund') seeks
high current income consistent with the preservation of captial and liquidity.
    
 
   
PAINEWEBBER LOW  DURATION  U.S. GOVERNMENT  INCOME  FUND ('Low  Duration  Income
Fund')  seeks the  highest level of  income consistent with  the preservation of
capital and low volatility of net asset value.
    
 
   
PAINEWEBBER INVESTMENT GRADE INCOME FUND ('Investment Grade Income Fund')  seeks
high current income consistent with the preservation of capital and liquidity.
    
 
   
PAINEWEBBER HIGH INCOME FUND ('High Income Fund') seeks high income.
    
 
   
    
 
   
PAINEWEBBER  HIGH  INCOME  FUND  INVESTS  PREDOMINANTLY  IN  LOWER  RATED BONDS,
COMMONLY REFERRED TO AS 'JUNK  BONDS.' BONDS OF THIS  TYPE ARE CONSIDERED TO  BE
SPECULATIVE  WITH RESPECT  TO THE PAYMENT  OF INTEREST AND  RETURN OF PRINCIPAL.
PURCHASERS SHOULD CAREFULLY ASSESS  THE RISKS ASSOCIATED  WITH AN INVESTMENT  IN
THIS FUND.
    
 
   
These  Funds are series of PaineWebber Managed Investments Trust ('Trust'). This
Prospectus concisely  sets  forth  information about  the  Funds  a  prospective
investor  should know before investing. Please retain this Prospectus for future
reference. A Statement of Additional Information  dated April 1, 1996 (which  is
incorporated  by  reference  herein)  has been  filed  with  the  Securities and
Exchange Commission. The  Statement of  Additional Information  can be  obtained
without charge, and further inquiries can be made, by contacting the Funds, your
PaineWebber  investment  executive or  PaineWebber's  correspondent firms  or by
calling  toll-free  1-800-647-1568.  The  Class  Y  shares  described  in   this
Prospectus  are  currently offered  for sale  primarily  to participants  in the
INSIGHT Investment  Advisory Program  ('INSIGHT'), when  purchased through  that
program.  The Class Y shares of U.S.  Government Income Fund also are offered to
the trustee of the PW SIP on behalf of that Plan. See 'Purchases.'  Participants
in the PaineWebber Savings Investment Plan ('PW SIP') may make further inquiries
by contacting the PaineWebber Incorporated Benefits Department, 10th Floor, 1000
Harbor Boulevard, Weehawken, New Jersey 07087 or by calling 1-201-902-4444.
    
 
- --------------------------------------------------------------------------------
 
THESE  SECURITIES HAVE NOT BEEN APPROVED OR DISAPPROVED BY THE SECURITIES AND
   EXCHANGE COMMISSION OR ANY STATE SECURITIES COMMISSION NOR HAS ANY  SUCH
     COMMISSION  PASSED UPON THE  ACCURACY OR ADEQUACY  OF THIS PROSPECTUS.
           ANY REPRESENTATION TO THE CONTRARY IS A CRIMINAL OFFENSE.
 
- --------------------------------------------------------------------------------

                                      Prospectus Page 1


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- --------------------------------------------------------------------------------
              PAINEWEBBER   U.S. GOVERNMENT INCOME FUND
              PAINEWEBBER   LOW DURATION U.S. GOVERNMENT INCOME FUND
              PAINEWEBBER   INVESTMENT GRADE INCOME FUND
              PAINEWEBBER   HIGH INCOME FUND
    
 
                               TABLE OF CONTENTS
- --------------------------------------------------------------------------------
 
   
<TABLE>
<S>                                                                                                                  <C>
                                                                                                                      Page
                                                                                                                     -----
Fund Expenses.....................................................................................................       3
Financial Highlights..............................................................................................       4
Investment Objectives and Policies................................................................................       5
Purchases.........................................................................................................      16
Redemptions.......................................................................................................      17
Dividends and Taxes...............................................................................................      18
Valuation of Shares...............................................................................................      19
Management........................................................................................................      19
Performance Information...........................................................................................      21
General Information...............................................................................................      21
Appendix A........................................................................................................      22
Appendix B........................................................................................................      25
Appendix C........................................................................................................      27
</TABLE>
    

                                      Prospectus Page 2


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              PAINEWEBBER   U.S. GOVERNMENT INCOME FUND
              PAINEWEBBER   LOW DURATION U.S. GOVERNMENT INCOME FUND
              PAINEWEBBER   INVESTMENT GRADE INCOME FUND
              PAINEWEBBER   HIGH INCOME FUND
 
                                 FUND EXPENSES
- --------------------------------------------------------------------------------
    

 
The following tables are intended to assist investors in understanding the
expenses associated with investing in Class Y shares of each Fund.
 
                        SHAREHOLDER TRANSACTION EXPENSES
 
   
<TABLE>
<S>                                                                                                                <C>
Sales charge on purchases of shares............................................................................    None
Sales charge on reinvested dividends...........................................................................    None
Redemption fee or deferred sales charge........................................................................    None
Maximum annual investment advisory fee payable by shareholders through INSIGHT (as a percentage of average
  daily net asset value of shares held)(1).....................................................................    1.50%
</TABLE>
    
 
                       ANNUAL FUND OPERATING EXPENSES(2)
                    (AS A PERCENTAGE OF AVERAGE NET ASSETS)
 
   
<TABLE>
<CAPTION>
                                                         U.S. GOVERNMENT    LOW DURATION    INVESTMENT GRADE       HIGH
                                                           INCOME FUND      INCOME FUND       INCOME FUND       INCOME FUND
                                                         ---------------    ------------    ----------------    -----------
<S>                                                      <C>                <C>             <C>                 <C>
Management fees.......................................         0.50%            0.50%             0.50%             0.50%
12b-1 fees............................................         0.00             0.00              0.00              0.00
Other expenses........................................         0.18(a)          0.40              0.20              0.18
                                                              -----            -----             -----             -----
Total operating expenses..............................         0.68%            0.90%             0.70%             0.68%
                                                              -----            -----             -----             -----
                                                              -----            -----             -----             -----
</TABLE>
    
 
- ------------
 
(a) Does not include 0.03% in non-recurring reorganization expenses that U.S.
    Government Income Fund incurred during the fiscal year ended November 30,
    1995. If those expenses were included, 'Other expenses' would be 0.21% and
    'Total operating expenses' would be 0.71%.
 
(1) Participation in INSIGHT is subject to payment of an advisory fee at the
    maximum annual rate of 1.50% of assets held through INSIGHT (generally
    charged quarterly in advance), which may be charged to the INSIGHT
    participant's PaineWebber account.
 
   
(2) See 'Management' for additional information. The fees and expenses are those
    actually incurred for the fiscal year ended November 30, 1995, except that
    'Other expenses' for Low Duration Income Fund, Investment Grade Income Fund
    and High Income Fund are estimated based on the expenses incurred by each
    Fund's Class A shares for the fiscal year ended November 30, 1995. The
    INSIGHT fee is not included.
    
 
                       EXAMPLE OF EFFECT OF FUND EXPENSES
 
An investor would directly or indirectly pay the following expenses (including
1.50% annual INSIGHT fee) on a $1,000 investment in each Fund, assuming a 5%
annual return:
 
   
<TABLE>
<CAPTION>
                                                                  ONE YEAR      THREE YEARS      FIVE YEARS      TEN YEARS
                                                                  --------      -----------      ----------      ---------
<S>                                                               <C>           <C>              <C>             <C>
U.S. Government Income Fund....................................     $ 22            $68             $117           $ 251
Low Duration Income Fund.......................................     $ 25            $78
Investment Grade Income Fund...................................     $ 22            $69
High Income Fund...............................................     $ 22            $68
</TABLE>
    
 
This Example assumes that all dividends and other distributions are reinvested
and that the percentage amounts listed under Annual Fund Operating Expenses
remain the same in the years shown. The above tables and the assumption in the
Example of a 5% annual return are required by regulations of the Securities and
Exchange Commission ('SEC') applicable to all mutual funds; the assumed 5%
annual return is not a prediction of, and does not represent, the projected or
actual performance of the Class Y shares of a Fund.
 
THE EXAMPLE SHOULD NOT BE CONSIDERED A REPRESENTATION OF PAST OR FUTURE
EXPENSES, AND A FUND'S ACTUAL EXPENSES MAY BE MORE OR LESS THAN THOSE SHOWN. The
actual expenses attributable to a Fund's Class Y shares will depend upon, among
other things, the level of average net assets and the extent to which the Fund
incurs variable expenses, such as transfer agency costs.


                                      Prospectus Page 3


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- --------------------------------------------------------------------------------
              PAINEWEBBER   U.S. GOVERNMENT INCOME FUND
              PAINEWEBBER   LOW DURATION U.S. GOVERNMENT INCOME FUND
              PAINEWEBBER   INVESTMENT GRADE INCOME FUND
              PAINEWEBBER   HIGH INCOME FUND

    



                              FINANCIAL HIGHLIGHTS
- --------------------------------------------------------------------------------
 
   
The table below provides selected per share data and ratios for one Class Y
share of U.S. Government Income Fund and Low Duration Income Fund for each of
the periods shown. This information is supplemented by the financial statements
and accompanying notes appearing in each Fund's Annual Report to Shareholders
for the fiscal year ended November 30, 1995, which are incorporated by reference
into the Statement of Additional Information. The financial statements and
notes, as well as the information in the table appearing below insofar as it
relates to the fiscal year ended November 30, 1995 and for the prior periods,
have been audited by Ernst & Young LLP, independent auditors, whose reports
thereon are included in the Annual Reports to Shareholders. Further information
about each Fund's performance is also included in the Annual Reports to
Shareholders, which may be obtained without charge. No information is presented
for Class Y shares of Investment Grade Income Fund and High Income Fund because
no such shares were outstanding as of November 30, 1995.
    
 
   
<TABLE>
<CAPTION>
                                                                                   CLASS Y SHARES**
                                                      --------------------------------------------------------------------------
                                                                                                                    LOW DURATION
                                                                     U.S. GOVERNMENT INCOME FUND                    INCOME FUND
                                                      ----------------------------------------------------------    ------------
                                                                                                      FOR THE         FOR THE
                                                                                                      PERIOD           PERIOD
                                                                                                   SEPTEMBER 11,    OCTOBER 20,
                                                          FOR THE YEARS ENDED NOVEMBER 30,           1991# TO         1995# TO
                                                      -----------------------------------------    NOVEMBER 30,     NOVEMBER 30,
                                                       1995         1994        1993      1992         1991             1995
                                                      ------       ------      ------    ------    -------------    ------------
 
<S>                                                   <C>          <C>         <C>       <C>       <C>              <C>
Net asset value, beginning of period...............   $ 8.49       $10.02      $ 9.97    $ 9.97       $  9.88          $ 2.33
                                                      ------       ------      ------    ------        ------          ------
Net investment income..............................     0.61         0.62        0.70      0.77          0.18            0.01
Net realized and unrealized gains (losses) from
  investment transactions..........................     0.62        (1.53)       0.05      0.01          0.09            0.01
                                                      ------       ------      ------    ------        ------          ------
Net increase (decrease) in net assets resulting
  from operations..................................     1.23        (0.91)       0.75      0.78          0.27            0.02
                                                      ------       ------      ------    ------        ------          ------
Dividends from net investment income...............    (0.61)       (0.62)      (0.70)    (0.78)        (0.18)          (0.01)
                                                      ------       ------      ------    ------        ------          ------
Net asset value, end of period.....................   $ 9.11       $ 8.49      $10.02    $ 9.97       $  9.97          $ 2.34
                                                      ------       ------      ------    ------        ------          ------
                                                      ------       ------      ------    ------        ------          ------
Total investment return(1).........................    15.06%       (9.37)%      7.69%     8.13%         2.37%           0.83%
                                                      ------       ------      ------    ------        ------          ------
                                                      ------       ------      ------    ------        ------          ------
RATIOS/SUPPLEMENTAL DATA:
    Net assets, end of period (000's omitted)......   $7,957       $4,955      $6,232    $5,517       $ 4,514          $  321
    Ratio of expenses to average net assets........     0.71%(2)     0.65%       0.62%     0.63%         0.72%*          0.99%*
    Ratio of net investment income to average net
      assets.......................................     6.96%(2)     6.76%       6.87%     7.70%         8.36%*          5.87%*
    Portfolio turnover rate........................      206%         358%         83%       28%          71%            242%
</TABLE>
    
 
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#  Commencement of offering of shares.
 
*  Annualized.
 
**  Formerly Class C shares.
 
   
(1) Total  return is calculated assuming a $1,000 investment on the first day of
    each period reported, reinvestment of all dividends and other  distributions
    at  net asset value on the payable date and a sale at net asset value on the
    last day of each  period reported. Total investment  returns for periods  of
    less  than one year have not been annualized. The figures do not include the
    INSIGHT fee; results would be lower if the INSIGHT fee were included.
    
 
(2) These ratios include non-recurring reorganization expenses of 0.03%.
 
                                      Prospectus Page 4




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- --------------------------------------------------------------------------------
              PAINEWEBBER   U.S. GOVERNMENT INCOME FUND
              PAINEWEBBER   LOW DURATION U.S. GOVERNMENT INCOME FUND
              PAINEWEBBER   INVESTMENT GRADE INCOME FUND
              PAINEWEBBER   HIGH INCOME FUND
    
                       INVESTMENT OBJECTIVES AND POLICIES
- --------------------------------------------------------------------------------
 
The investment objective of U.S. GOVERNMENT INCOME FUND is to provide high
current income consistent with the preservation of capital and liquidity. The
Fund invests primarily in U.S. government securities.
 
The investment objective of LOW DURATION INCOME FUND is to achieve the highest
level of income consistent with the preservation of capital and low volatility
of net asset value. The Fund invests primarily in U.S. government securities and
seeks to limit the volatility of its net asset value per share by maintaining,
under normal circumstances, an overall portfolio duration of from one to three
years.
 
   
The  investment objective  of INVESTMENT  GRADE INCOME  FUND is  to provide high
current income consistent with  the preservation of  capital and liquidity.  The
Fund  invests in a diversified  range of investment grade  bonds and other fixed
income securities.
    
 
   
The investment objective of HIGH INCOME FUND is to provide high income. The Fund
invests primarily in  a diversified  range of high  risk, high  yield medium  to
lower quality corporate bonds.
    
 
   
The Funds are diversified series of an open-end management investment company.
Mitchell Hutchins Asset Management Inc. ('Mitchell Hutchins') is each Fund's
investment adviser and administrator. Pacific Investment Management Company
('PIMCO') serves as sub-adviser for Low Duration Income Fund.
    
   
There  can be no assurance that any  Fund will achieve its investment objective.
Each Fund's net asset value  will fluctuate based upon  changes in the value  of
its   portfolio  securities.  Each  Fund's   investment  objective  and  certain
investment limitations as described in  the Statement of Additional  Information
are fundamental policies and may not be changed without shareholder approval. In
addition,  the policy of  each of U.S.  Government Income Fund  and Low Duration
Income Fund  of normally  concentrating at  least  25% of  its total  assets  in
mortgage-  and asset-backed  securities is  fundamental and  may not  be changed
without shareholder approval. All  other investment policies  may be changed  by
the Trust's board of trustees without shareholder approval.
    
   
U.S. GOVERNMENT INCOME FUND AND LOW
DURATION INCOME FUND.  Under normal conditions, U.S. Government Income Fund and
Low Duration Income Fund each invests at least 65% of its total assets in U.S.
government securities, including mortgage-backed securities issued or guaranteed
by the U.S. government, its agencies or instrumentalities ('U.S. government
mortgage-backed securities'), other obligations issued or guaranteed by the U.S.
government, its agencies or instrumentalities and repurchase agreements with
respect to those securities. While these instruments may be guaranteed as to the
payment of interest and principal, they are not guaranteed as to market value.
Up to 35% of each Fund's total assets may be invested in privately issued
mortgage- and asset-backed securities that at the time of purchase have been
rated AAA by Standard & Poor's, a division of The McGraw Hill Companies, Inc.
('S&P'), or Aaa by Moody's Investors Service, Inc. ('Moody's'), have an
equivalent rating from another nationally recognized statistical rating
organization ('NRSRO') or, if unrated, have been determined by Mitchell Hutchins
or PIMCO, as applicable, to be of comparable quality. As a matter of fundamental
policy, each Fund normally concentrates at least 25% of its total assets in
mortgage- and asset-backed securities issued or guaranteed by private issuers or
by agencies or instrumentalities of the U.S. government.
    
 
Low Duration Income Fund seeks to limit the volatility of its net asset value
per share by maintaining, under normal circumstances, an overall portfolio
duration of from one to three years. U.S. Government Income Fund has no fixed
portfolio duration policy. Duration is a measure of the expected life of a fixed
income security on a present value basis. See 'Duration.'
 
Mortgage-backed securities represent direct or indirect participations in, or
are secured by and payable from, mortgage loans secured by real property and
include single- and multi-class pass-through securities and collateralized
mortgage
 
                                      Prospectus Page 5
 

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- --------------------------------------------------------------------------------
              PAINEWEBBER   U.S. GOVERNMENT INCOME FUND
              PAINEWEBBER   LOW DURATION U.S. GOVERNMENT INCOME FUND
              PAINEWEBBER   INVESTMENT GRADE INCOME FUND
              PAINEWEBBER   HIGH INCOME FUND
    
obligations. Multi-class pass-through securities and collateralized mortgage
obligations are collectively referred to herein as CMOs. Issuers and guarantors
of the U.S. government mortgage-backed securities in which the Funds may invest
include the Government National Mortgage Association ('Ginnie Mae'), the Federal
National Mortgage Association ('Fannie Mae') or the Federal Home Loan Mortgage
Corporation ('Freddie Mac'). Private issuers of mortgage-backed securities in
which the Funds may invest are generally originators of, and investors in,
mortgage loans, including savings associations, mortgage bankers, commercial
banks, investment bankers and special purpose entities (collectively, 'Private
Mortgage Lenders'). Payments of principal and interest (but not the market
value) of such private mortgage-backed securities may be supported by pools of
mortgage loans or other mortgage-backed securities that are guaranteed, directly
or indirectly, by the U.S. government or one of its agencies or
instrumentalities, or they may be issued without any government guarantee of the
underlying mortgage assets but with some form of non-government credit
enhancement. For more information concerning the types of mortgage-backed
securities in which the Funds may invest, see Appendix A to this Prospectus.
 
Each Fund's policy of investing at least 25% of its total assets in mortgage- 
and asset-backed securities has the effect of increasing the Fund's exposure to 
the risks related to such securities and might cause the Fund's net asset value 
per share to fluctuate more than otherwise would be the case. See 'Risks of
Mortgage- and Asset-Backed Securities.'
 
   
Non-mortgage-related U.S. government securities in which U.S. Government Income
Fund and Low Duration Income Fund may invest include U.S. Treasury obligations
and other obligations backed by the full faith and credit of the U.S. government
and securities that are supported primarily or solely by the creditworthiness of
the issuer, such as securities issued by the Resolution Funding Corporation, the
Student Loan Marketing Association, the Federal Home Loan Banks and the
Tennessee Valley Authority.
    
 
   
U.S. Government Income Fund and Low
Duration Income Fund may invest in certain zero coupon securities that are U.S.
Treasury notes and bonds that have been stripped of their unmatured interest
coupon receipts or interests in such U.S. Treasury securities or coupons. The
SEC staff currently takes the position that 'stripped' U.S. government
securities that are not issued through the U.S. Treasury are not U.S. government
securities. As long as the SEC takes this position, Certificates of Accrual
Treasury Securities ('CATS') and Treasury Income Growth Receipts ('TIGRs') which
are not issued through the U.S. Treasury will not be counted as U.S. government
securities for purposes of the 65% investment requirement. See 'Risks of Zero
Coupon Securities.'
    
 
Asset-backed securities have structural characteristics similar to
mortgage-backed securities. However, the underlying assets are not first lien
mortgage loans or interests therein, but include assets such as motor vehicle
installment sale contracts, other installment sale contracts, home equity loans,
leases of various types of real and personal property and receivables from
revolving credit (credit card) agreements. Such assets are securitized through
the use of trusts or special purpose corporations. Payments or distributions of
principal and interest on asset-backed securities may be guaranteed up to
certain amounts and for a certain time period by a letter of credit or a pool
insurance policy issued by a financial institution unaffiliated with the issuer
or other credit enhancements may be present.
 
Each Fund also may seek to enhance income or to reduce the risks associated with
ownership of the securities in which it invests through the use of options,
futures contracts, options on futures contracts, interest rate protection
transactions, dollar rolls and reverse repurchase agreements. See 'Hedging and
Related Income Strategies' and 'Dollar Rolls and Reverse Repurchase Agreements'.
 
   
INVESTMENT GRADE INCOME FUND.  Investment Grade Income Fund invests in a
diversified range of investment grade bonds and other fixed income securities.
Investment grade bonds are those bonds that, at the time of purchase, are
assigned one of the four highest grades by S&P or Moody's, are comparably rated
by another NRSRO or, if unrated, are determined by
Mitchell Hutchins to be of comparable quality to such rated securities. Under
normal circumstances, the Fund invests at least 65% of its total assets in
investment grade corporate bonds and securities issued or guaranteed by the U.S.
government, its agencies or instrumentalities. Up to 35% of the Fund's total
assets may be invested in corporate bonds that are below investment grade,
    
 
                                      Prospectus Page 6
 

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- --------------------------------------------------------------------------------
              PAINEWEBBER   U.S. GOVERNMENT INCOME FUND
              PAINEWEBBER   LOW DURATION U.S. GOVERNMENT INCOME FUND
              PAINEWEBBER   INVESTMENT GRADE INCOME FUND
              PAINEWEBBER   HIGH INCOME FUND
    
   
preferred stocks, convertible securities, certain mortgage- and asset-backed
securities described below, commercial paper or variable amount master notes
issued by companies having at the time of purchase an issue of outstanding debt
securities rated investment grade by S&P or Moody's or commercial paper rated
A-1 by S&P or P-1 by Moody's, and other money market instruments, including
repurchase agreements. Up to 20% of the Fund's net assets may be invested in
U.S. dollar-denominated securities of foreign issuers or foreign branches of
U.S. banks that are traded in the U.S. securities markets, or in U.S.
dollar-denominated securities the value of which is linked to the value of
foreign currencies. The Fund may also seek to enhance income or to reduce the
risks associated with ownership of the securities in which it invests through
the use of options, futures contracts, options on futures contracts and interest
rate protection transactions. See 'Hedging and Related Income Strategies.'
    
 
   
Investment Grade Income Fund may invest in mortgage-backed securities that are
issued or guaranteed as to the payment of principal and interest (but not as to
market value) by the U.S. government, its agencies or instrumentalities or
issued by private issuers and rated in the four highest ratings of S&P or
Moody's. The Fund also may invest in asset-backed securities that are rated in
the two highest ratings assigned by S&P or Moody's. See 'Risk Factors.' The Fund
may invest up to 10% of its total assets in classes of mortgage-backed
securities that receive different proportions of the interest and principal
distributions from the underlying mortgage assets. See 'Risks of Mortgage- and
Asset-Backed Securities.'
    
 
   
During its 1995 fiscal year, Investment Grade Income Fund had 100% of its
average annual net assets in debt securities that received a rating from S&P or
Moody's or another NRSRO. The Fund had the following percentages of its average
annual net assets invested in rated securities: AAA/Aaa (including cash
items) -- 13%, AA/Aa -- 7%, A/A -- 35%, BBB/Baa -- 29%, BB/Ba -- 15%, B/B -- 1%
and CCC/Caa -- 0%. It should be noted that this information reflects the average
composition of the Fund's assets during the fiscal year ended November 30, 1995
and is not necessarily representative of the Fund's assets as of the end of that
fiscal year, the current fiscal year or at any time in the future.
    
 
   
HIGH INCOME FUND.  High Income Fund invests primarily in a diversified range of
high risk, high yield medium to lower quality bonds. Generally, higher yielding
bonds carry ratings assigned by S&P, Moody's or another NRSRO that are lower
than those assigned to investment grade bonds, or are unrated, and thus carry
higher investment risk than investment grade bonds. See 'Risks of Lower Rated
Securities.' Under normal circumstances, at lease 65% of the Fund's total assets
are invested in high risk, high yielding, income-producing corporate debt
securities that at the time of purchase are rated B or better by S&P or Moody's,
comparably rated by another NRSRO or are unrated but determined to be of
comparable quality by Mitchell Hutchins.
    
 
   
Up to 35% of the Fund's total assets may be invested in debt securities rated
below B by S&P or Moody's or comparably rated by another NRSRO, preferred
stocks, securities issued or guaranteed by the U.S. government, its agencies or
instrumentalities, equity securities (including common stocks, warrants and
rights) which may be attached to fixed income securities or as a part of a unit
including fixed income securities or in connection with a conversion or exchange
of fixed income securities, and money market instruments, including repurchase
agreements. The Fund may invest in securities selling at a substantial discount
from par.
    
 
   
High Income Fund is permitted to invest up to 25% of its total assets in
securities that do not currently provide income but that Mitchell Hutchins
believes have the potential for capital appreciation. These securities include
debt securities that are not currently paying income and equity securities, such
as common stock, warrants, rights and preferred stocks, that are not paying
current income. The Fund may invest up to 35% of its net assets in securities of
foreign issuers, with no more than 10% of its net assets in securities of
foreign issuers that are denominated and traded in currencies other than the
U.S. dollar. The Fund may also seek to enhance income or to reduce the risks
associated with ownership of the debt securities in which it invests through the
use of options, futures contracts, options on futures contracts, forward
currency contracts and interest rate protection transactions. See 'Hedging and
Related Income Strategies.'
    
 
   
During its 1995 fiscal year, High Income Fund had 80% of its average annual net
assets in debt securities that received a rating from S&P or
    
                                      Prospectus Page 7
 

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              PAINEWEBBER   U.S. GOVERNMENT INCOME FUND
              PAINEWEBBER   LOW DURATION U.S. GOVERNMENT INCOME FUND
              PAINEWEBBER   INVESTMENT GRADE INCOME FUND
              PAINEWEBBER   HIGH INCOME FUND

    
    
Moody's or another NRSRO and 15% of its average annual net assets in debt
securities that were not so rated. The Fund had the following percentages of its
average annual net assets invested in rated securities: AAA/Aaa (including cash
items) -- 2%, AA/Aa -- 0%, A/A -- 0%, BBB/Baa -- 0%, BB/Ba -- 21%, B/B -- 51%,
CCC/Caa -- 6%. It should be noted that this information reflects the average
composition of the Fund's assets during the fiscal year ended November 30, 1995
and is not necessarily representative of the Fund's assets as of the end of that
fiscal year, the current fiscal year or at any time in the future.
    
 
   
OTHER INVESTMENT POLICIES AND RISK
FACTORS
    
 
RISK FACTORS.  Each Fund's net asset value fluctuates based on changes in the
value of its portfolio securities. Neither the issuance by, nor the guarantee
of, a U.S. government agency, nor even the highest rating by a NRSRO constitutes
assurance that the security will not fluctuate in value or that a Fund will
receive the originally anticipated yield on the security. An investment in a
Fund also is subject to the risks discussed below.
 
 -- INTEREST RATE SENSITIVITY.  The investment income of each Fund is based on
the income earned on the securities it holds, less expenses incurred; thus, the
Fund's investment income may be expected to fluctuate in response to changes in
such expenses or income. The investment income of a Fund also may be affected if
it experiences a net inflow of new money that is then invested in securities
whose yield is higher or lower than that earned on then-current investments.
Generally, the value of the debt securities held by the Funds, and thus the net
asset value per share of each Fund, will rise when interest rates decline.
Conversely, when interest rates rise, the value of fixed income securities, and
thus the net asset value per share of each Fund, may be expected to decline.
 
   
 -- RISKS OF MORTGAGE- AND ASSET-BACKED SECURITIES. The yield characteristics of
the mortgage- and asset-backed securities in which U.S. Government Income Fund,
Low Duration Income Fund and Investment Grade Income Fund may invest differ from
those of traditional debt securities. Among the major differences are that
interest and principal payments are made more frequently on mortgage- and
asset-backed securities (usually monthly) and that principal may be prepaid at
any time because the underlying mortgage loans or other assets generally may be
prepaid at any time. As a result, if a Fund purchases these securities at a
premium, a prepayment rate that is faster than expected will reduce yield to
maturity, while a prepayment rate that is slower than expected will have the
opposite effect of increasing yield to maturity. Conversely, if a Fund purchases
these securities at a discount, faster than expected prepayments will increase,
while slower than expected prepayments will reduce, yield to maturity. Amounts
available for reinvestment by a Fund are likely to be greater during a period of
declining interest rates and, as a result, are likely to be reinvested at lower
interest rates than during a period of rising interest rates. Accelerated
prepayments on securities purchased by a Fund at a premium also impose a risk of
loss of principal because the premium may not have been fully amortized at the
time the principal is prepaid in full. The market for privately issued mortgage-
and asset-backed securities is smaller and less liquid than the market for U.S.
government mortgage-backed securities. CMO classes may be specially structured
in a manner that provides any of a wide variety of investment characteristics,
such as yield, effective maturity and interest rate sensitivity. As market
conditions change, however, and particularly during periods of rapid or
unanticipated changes in market interest rates, the attractiveness of the CMO
classes and the ability of the structure to provide the anticipated investment
characteristics may be significantly reduced. These changes can result in
volatility in the market value and, in some instances, reduced liquidity, of the
CMO class.
    
 
   
Certain classes of CMOs and other mortgage-backed securities are structured in a
manner that makes them extremely sensitive to changes in prepayment rates.
Interest-only ('IO') and principal-only ('PO') classes are examples of this. IOs
are entitled to receive all or a portion of the interest, but none (or only a
nominal amount) of the principal payments, from the underlying mortgage assets.
If the mortgage assets underlying an IO experience greater than anticipated
principal prepayments, then the total amount of interest payments allocable to
the IO class, and therefore the yield to investors, generally will be reduced.
In some instances, an investor in an IO may fail to recoup all of his or her
initial investment, even if the security is government issued or guaranteed or
is rated AAA or the equivalent.
    
 
                                      Prospectus Page 8
 

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<PAGE> 
 

   
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              PAINEWEBBER   U.S. GOVERNMENT INCOME FUND
              PAINEWEBBER   LOW DURATION U.S. GOVERNMENT INCOME FUND
              PAINEWEBBER   INVESTMENT GRADE INCOME FUND
              PAINEWEBBER   HIGH INCOME FUND

    
    
Conversely, PO classes are entitled to receive all or a portion of the principal
payments, but none of the interest, from the underlying mortgage assets. PO
classes are purchased at substantial discounts from par, and the yield to
investors will be reduced if principal payments are slower than expected. Some
IOs and POs, as well as other CMO classes, are structured to have special
protections against the effects of prepayments. These structural protections,
however, normally are effective only within certain ranges of prepayment rates
and thus will not protect investors in all circumstances.
    
 
   
While Low Duration Income Fund generally may invest in CMO classes that are
structured to sell at a premium or a discount or that are sensitive to changes
in prepayment rates, that Fund may not invest in IO or PO classes. U.S.
Government Income Fund and Investment Grade Income Fund are not subject to any
similar limitation.
    
 
   
Some CMO classes are structured to pay interest at rates that are adjusted in
accordance with a formula, such as a multiple or fraction of the change in a
specified interest rate index, so as to pay at a rate that will be attractive in
certain interest rate environments but not in others. For example, an inverse
floating rate CMO class pays interest at a rate that increases as a specified
interest rate index decreases but decreases as that index increases. For other
CMO classes, the yield may move in the same direction as market interest
rates -- i.e., the yield may increase as rates increase and decrease as rates
decrease -- but may do so more rapidly or to a greater degree. The market value
of such securities generally is more volatile than that of a fixed rate
obligation. Such interest rate formulas may be combined with other CMO
characteristics. For example, a CMO class may be an 'inverse IO,' on which the
holders are entitled to receive no payments of principal and are entitled to
receive interest at a rate that will vary inversely with a specified index or a
multiple thereof. Low Duration Income Fund may not invest in inverse floating
rate mortgage-or asset-backed securities. U.S. Government Income Fund and
Investment Grade Income Fund are not subject to any similar limitation.
    
 
During 1994, the value and liquidity of many mortgage-backed securities declined
sharply due primarily to increases in interest rates. There can be no assurance
that such declines will not recur. The market value of certain mortgage-backed
securities, including IO and PO classes of
mortgage-backed securities and inverse floating rate securities, can be
extremely volatile and these securities may become illiquid. Mitchell Hutchins
or PIMCO, as applicable, seeks to manage each Fund so that the volatility of the
Fund's portfolio, taken as a whole, is consistent with the Fund's investment
objective. If market interest rates or other factors that affect the volatility
of securities held by a Fund change in ways that Mitchell Hutchins or PIMCO does
not anticipate, the Fund's ability to meet its investment objective may be
reduced.
 
   
See Appendix A to this Prospectus for more information concerning the types of
mortgage-backed securities in which U.S. Government Income Fund, Low Duration
Income Fund and Investment Grade Income Fund may invest.
    
 
   
 -- RATINGS OF DEBT SECURITIES.  Ratings of debt securities represent the
NRSROs' opinions regarding their quality, are not a guarantee of quality and may
be reduced after a Fund has acquired the security. Mitchell Hutchins or PIMCO
would consider such an event in determining whether the Fund should continue to
hold the security but is not required to dispose of it. Credit ratings attempt
to evaluate the safety of principal and interest payments and do not reflect an
assessment of the volatility of the security's market value or the liquidity of
an investment in the security. Also, NRSROs may fail to make timely changes in
credit ratings in response to subsequent events, so that an issuer's financial
condition may be better or worse than the rating indicates. See Appendix B to
this Prospectus for further information regarding S&P's or Moody's ratings.
    
 
   
 -- RISKS OF LOWER RATED SECURITIES.  High Income Fund may invest all of its
assets in corporate bonds rated below investment grade and Investment Grade
Income Fund may invest up to 35% of its assets in such bonds. Investment Grade
Income Fund must normally invest at least 65% of its assets in debt securities
rated investment grade. Investment grade bonds include debt securities rated BBB
by S&P, Baa by Moody's or comparably rated by another NRSRO. Moody's considers
securities rated Baa to have speculative characteristics. Changes in economic
conditions or other circumstances are more likely to lead to a weakened capacity
for such securities to make principal and interest payments than is the case for
higher grade debt securities. Debt securities rated below investment grade are
    
 
                                      Prospectus Page 9
 

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<PAGE> 
 
   
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              PAINEWEBBER   U.S. GOVERNMENT INCOME FUND
              PAINEWEBBER   LOW DURATION U.S. GOVERNMENT INCOME FUND
              PAINEWEBBER   INVESTMENT GRADE INCOME FUND
              PAINEWEBBER   HIGH INCOME FUND
    
 
   
deemed by these agencies to be predominately speculative with respect to the
issuer's capacity to pay interest and repay principal and may involve major risk
exposure to adverse conditions. Such securities are commonly referred to as
'junk bonds.' Investment Grade Income Fund and High Income Fund each may invest
up to 35% of its assets in debt securities rated lower than B, which include
securities that are in default or face the risk of default with respect to the
payment of principal or interest. Such securities are generally unsecured and
are often subordinated to other creditors of the issuer. To the extent a Fund is
required to seek recovery upon a default in the the payment of principal or
interest on its portfolio holdings, the Fund may incur additional expenses and
may have limited legal recourse in the event of a default. Investment Grade
Income Fund and High Income Fund are also permitted to purchase debt securities
that are not rated by a NRSRO but that Mitchell Hutchins determines to be of
comparable quality to that of rated securities in which those Funds may invest.
Such securities are included in the computation of any percentage limitations
applicable to the comparable rated securities. In the event that, due to a
downgrade of one or more debt securities, an amount in excess of 35% of
Investment Grade Income Fund's total assets is held in securities rated below
investment grade and comparable unrated securities, Mitchell Hutchins will
engage in an orderly disposition of such securities to the extent necessary to
reduce the Fund's holdings of these securities to 35% of total assets.
    
 
   
Lower rated debt securities generally offer a higher current yield than that
available from higher grade issues, but they involve higher risks, in that they
are especially subject to adverse changes in general economic conditions and in
the industries in which the issuers are engaged, to changes in the financial
condition of the issuers and to price fluctuation in response to changes in
interest rates. During periods of economic downturn or rising interest rates,
highly leveraged issuers may experience financial stress, which would adversely
affect their ability to make payments of principal and interest and increase the
possibility of default. In addition, such issuers may not have more traditional
methods of financing available to them, and may be unable to repay debt at
maturity by refinancing. The risk of loss due to default by such issuers is
significantly greater because such securities frequently are unsecured and
subordinated to the prior payment of senior indebtedness.
    
   
The market for lower rated securities has expanded rapidly in recent years, and
its growth paralleled a long economic expansion. In the past, the prices of many
lower rated debt securities declined substantially, reflecting an expectation
that many issuers of such securities might experience financial difficulties. As
a result, the yields on lower rated debt securities rose dramatically. However,
such higher yields did not reflect the value of the income stream that holders
of such securities expected, but rather the risk that holders of such securities
could lose a substantial portion of their value as a result of the issuers'
financial restructuring or default. There can be no assurance that such declines
will not recur. The market for lower rated debt securities generally is thinner
and less active than that for higher quality securities, which may limit a
Fund's ability to sell such securities at fair value in response to changes in
the economy or the financial markets. Adverse publicity and investor
perceptions, whether or not based on fundamental analysis, may also decrease the
values and liquidity of lower rated securities, especially in a thinly traded
market.
    
 
   
Although Mitchell Hutchins will attempt to minimize the speculative risks
associated with investments in such securities through diversification, credit
analysis and attention to current trends in interest rates and other factors,
investors should carefully review the objectives and policies of Investment
Grade Income Fund and High Income Fund and consider their ability to assume the
investment risks involved before making an investment in these Funds.
    
 
   
 -- RISKS OF ZERO COUPON SECURITIES.  Each Fund may invest in certain zero
coupon securities that are 'stripped' U.S. Treasury notes and bonds. High Income
Fund may also invest in zero coupon securities of corporate issuers and other
securities that are issued with original issue discount ('OID') and
payment-in-kind ('PIK') securities. Zero coupon securities pay no interest to
holders prior to maturity. Zero coupon securities usually trade at a substantial
discount from their face or par value; PIK securities often trade at a discount
from their face or par value. Both zero coupon and PIK securities are subject to
greater fluctuations of market value in response to changing interest rates than
debt obligations
    
 
                                      Prospectus Page 10
 

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<PAGE> 
 
   
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              PAINEWEBBER   U.S. GOVERNMENT INCOME FUND
              PAINEWEBBER   LOW DURATION U.S. GOVERNMENT INCOME FUND
              PAINEWEBBER   INVESTMENT GRADE INCOME FUND
              PAINEWEBBER   HIGH INCOME FUND
    
 
of comparable maturities that make current distributions of interest in cash.
 
   
Federal tax law requires that a holder of a security with OID accrue a portion
of the OID on the security as income each year, even though the holder may
receive no interest payment on the security during the year. Accordingly,
although the investing Fund will receive no payments on its zero coupon
securities prior to their maturity or disposition, it will have income
attributable to such securities. Similarly, while PIK securities may pay
interest in the form of additional securities rather than cash, that interest
must be included in High Income Fund's annual income.
    
 
   
Companies such as the Funds, which seek to qualify for pass-through federal
income tax treatment as regulated investment companies, must distribute
substantially all of their net investment income each year, including non-cash
income. Accordingly, each Fund will be required to include in its dividends an
amount equal to the income attributable to its zero coupon securities, other OID
and PIK securities. See 'Taxes' in the Statement of Additional Information.
Those dividends will be paid from the cash assets of a Fund or by liquidation of
portfolio securities, if necessary, at a time when the Fund otherwise might not
have done so.
    
 
   
 -- RISKS OF FOREIGN SECURITIES.  Investment Grade Income Fund may invest up to
20% of its net assets in U.S. dollar-denominated securities of foreign issuers
or foreign branches of U.S. banks that are traded in the U.S. securities
markets, or in U.S. dollar-denominated securities the value of which is linked
to the value of foreign currencies. High Income Fund may invest up to 35% of its
net assets in securities of foreign issuers, with no more than 10% of its net
assets in securities of foreign issuers that are denominated and traded in
currencies other than the U.S. dollar. The foreign securities in which these
Funds may invest involve risks relating to political, social and economic
developments abroad, as well as risks resulting from the differences between the
regulations to which U.S. and foreign issuers and markets are subject.
Individual foreign economies may differ favorably or unfavorably from the U.S.
economy. Securities of many foreign companies may be less liquid and their
prices more volatile than securities of comparable U.S. companies. Foreign
securities may from time to time be difficult to liquidate rapidly without
significantly depressing the price of such securities. There may be less
publicly available information concerning foreign issuers of securities held by
the Funds than is available concerning U.S. issuers.
    
 
   
High Income Fund and Investment Grade Income Fund may each invest in dollar-
denominated securities whose value is linked to the value of foreign currencies,
and High Income Fund may invest in non-U.S. dollar-denominated securities.
Accordingly, changes in foreign currency exchange rates will affect the Fund's
net asset value, the value of dividends and interest earned, gains and losses
realized on the sale of securities and net investment income to be distributed
to shareholders by the Fund. In addition, some foreign currency values may be
volatile and there is the possibility of governmental controls on currency
exchange or governmental intervention in currency markets. Any of these factors
could adversely affect the Fund.
    
 
   
The costs attributable to foreign investing that High Income Fund must bear
frequently are higher than those attributable to domestic investing. For
example, the costs of maintaining custody of securities in foreign countries
exceed custodian costs related to domestic securities.
    
 
   
High Income Fund may enter into forward currency contracts to set the rate at
which currency exchanges will be made for specific contemplated transactions.
The Fund might also enter into forward currency contracts for the purchase or
sale of a specified currency at a specified future date either with respect to
contemplated transactions or with respect to portfolio positions. For example,
when Mitchell Hutchins anticipates making a currency exchange transaction in
connection with the purchase or sale of a security, the Fund may enter into a
forward currency contract in order to set the exchange rate at which the
transaction will be made. The Fund also may enter into a forward contract to
sell an amount of a foreign currency approximating the value of some or all of
its securities denominated in that currency.
    
 
   
High Income Fund may use forward contracts in one currency or a basket of
currencies to hedge against fluctuations in the value of another currency when
Mitchell Hutchins anticipates there will be a correlation between the two and
may use forward currency contracts to shift the Fund's exposure to foreign
currency fluctuations from one country to another. The purpose of entering into
these contracts is to minimize the risk to the Fund from adverse changes in the
    
 
                                      Prospectus Page 11
 

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              PAINEWEBBER   U.S. GOVERNMENT INCOME FUND
              PAINEWEBBER   LOW DURATION U.S. GOVERNMENT INCOME FUND
              PAINEWEBBER   INVESTMENT GRADE INCOME FUND
              PAINEWEBBER   HIGH INCOME FUND
    
 
   
relationship between the U.S. dollar and foreign currencies.
    
 
   
High Income Fund may also write covered put and call options and purchase put
and call options on foreign currencies to hedge against movements in currency
exchange rates. The risks of these hedging strategies are similar to those of
the other hedging strategies in which the Fund may engage, as described under
'Hedging and Related Income Strategies.' See the Statement of Additional
Information for more information on currency hedging strategies.
    
 
   
HEDGING AND RELATED INCOME STRATEGIES.  Each Fund may use options (both
exchange-traded and over-the-counter ('OTC')), futures contracts and interest
rate protection transactions to attempt to enhance income and to reduce the
overall risk of its investments (hedge). Hedging strategies may be used in an
attempt to manage a Fund's average duration and other risks of its investments,
which can affect fluctuations in the Fund's net asset value. A Fund's ability to
use these strategies may be limited by market conditions, regulatory limits and
tax considerations. The use of options and futures solely to enhance income may
be considered a form of speculation. Appendix C to this Prospectus describes the
hedging instruments that the Funds may use, and the Statement of Additional
Information contains further information on these strategies.
    
 
Each Fund may write (sell) covered call and put options, buy call and put
options, buy and sell interest rate futures contracts and buy call or put
options or write covered call options on such futures contracts. In addition,
Low Duration Income Fund may buy and sell debt security index futures contracts.
Each Fund may enter into options and futures contracts under which the full
value of its portfolio is at risk. Under normal circumstances, however, a Fund's
use of these instruments will place at risk a much smaller portion of its
assets.
 
The Funds may enter into interest rate protection transactions, including
interest rate swaps, caps, collars and floors, to preserve a return or spread on
a particular investment or portion of a portfolio or to protect against any
increase in the price of securities a Fund anticipates purchasing at a later
date. A Fund will enter into interest rate protection transactions only with
banks and recognized securities dealers believed by Mitchell Hutchins or PIMCO
to present minimal credit risks in accordance with guidelines established by the
Trust's board of trustees. A Fund would use these transactions as a hedge and
not as a speculative investment.
 
The Funds might not employ any of the strategies described above, and no
assurance can be given that any strategy used will succeed. If Mitchell Hutchins
or PIMCO incorrectly forecasts interest rates, market values or other economic
factors in utilizing a strategy for a Fund, the Fund would be in a better
position if it had not entered into the transaction at all. The use of these
strategies involves certain special risks, including (1) the fact that skills
needed to use hedging instruments are different from those needed to select the
Funds' securities, (2) possible imperfect correlation, or even no correlation,
between price movements of hedging instruments and price movements of the
investments being hedged, (3) the fact that, while hedging strategies can reduce
the risk of loss, they can also reduce the opportunity for gain, or even result
in losses, by offsetting favorable price movements in hedged investments and (4)
the possible inability of a Fund to purchase or sell a portfolio security at a
time that otherwise would be favorable for it to do so, or the possible need for
a Fund to sell a portfolio security at a disadvantageous time, due to the need
for the Fund to maintain 'cover' or to segregate securities in connection with
hedging transactions and the possible inability of a Fund to close out or to
liquidate its hedged position.
 
   
DOLLAR ROLLS AND REVERSE REPURCHASE AGREEMENTS.  U.S. Government Income Fund and
Low Duration Income Fund each may enter into dollar rolls, in which the Fund
sells mortgage-backed or other securities for delivery in the current month and
simultaneously contracts to purchase substantially similar securities on a
specified future date.
    
 
In the case of dollar rolls involving mortgage-backed securities, the
mortgage-backed securities that are purchased will be of the same type and will
have the same interest rate as those sold, but will be supported by different
pools of mortgages. The Fund forgoes principal and interest paid during the roll
period on the securities sold, but the Fund is compensated by the difference
between the current sales price and the lower price for the future purchase as
well as by any interest earned on the proceeds of the securities sold. The Fund
also could be compensated
 
                                      Prospectus Page 12
 

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<PAGE> 
 
   
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              PAINEWEBBER   U.S. GOVERNMENT INCOME FUND
              PAINEWEBBER   LOW DURATION U.S. GOVERNMENT INCOME FUND
              PAINEWEBBER   INVESTMENT GRADE INCOME FUND
              PAINEWEBBER   HIGH INCOME FUND
    
 
through the receipt of fee income equivalent to a lower forward price.
 
   
U.S. Government Income Fund and Low
Duration Income Fund each may also enter into reverse repurchase agreements in
which the Fund sells securities to a bank or dealer and agrees to repurchase
them at a mutually agreed-upon date and price. The market value of securities
sold under reverse repurchase agreements typically is greater than the proceeds
of the sale, and accordingly, the market value of the securities sold is likely
to be greater than the value of the securities in which the Fund invests those
proceeds. Thus, reverse repurchase agreements involve the risk that the buyer of
the securities sold by the Fund might be unable to deliver them when the Fund
seeks to repurchase. In the event the buyer of securities under a reverse
repurchase agreement files for bankruptcy or becomes insolvent, such buyer or
its trustee or receiver may receive an extension of time to determine whether to
enforce the Fund's obligation to repurchase the securities and the Fund's use of
the proceeds of the reverse repurchase agreement may effectively be restricted
pending such decision.
    
 
   
The dollar rolls and reverse repurchase agreements entered into by U.S.
Government Income Fund and Low Duration Income Fund normally will be arbitrage
transactions in which the Fund will maintain an offsetting position in
securities or repurchase agreements that mature on or before the settlement date
on the related dollar roll or reverse repurchase agreement. Because a Fund will
receive interest on the securities or repurchase agreements in which it invests
the transaction proceeds, such transactions may involve leverage. However,
because such securities or repurchase agreements must satisfy the quality
requirements of the Fund, and will mature on or before the settlement date on
the related dollar roll or reverse repurchase agreement, Mitchell Hutchins and
PIMCO believe that such arbitrage transactions do not present the risks to the
Funds that are associated with other types of leverage.
    
 
Dollar rolls and reverse repurchase agreements will be considered to be
borrowings and, accordingly, will be subject to each Fund's limitations on
borrowings, which will restrict the aggregate of such transactions (plus any
other borrowings) to 33 1/3% of each Fund's total assets. A Fund will not enter
into dollar rolls or reverse repurchase agreements, other than in arbitrage
transactions as described above, in an aggregate amount in excess of 5% of the
Fund's total assets. The Funds have no present intention to enter into dollar
rolls other than in such arbitrage transactions, and they have no present
intention to enter into reverse repurchase agreements other than in such
arbitrage transactions or for temporary or emergency purposes. Each Fund may
borrow money for temporary or emergency purposes, but not in excess of an
additional 5% of its total assets.
 
REPURCHASE AGREEMENTS.  Each Fund may use repurchase agreements. Repurchase
agreements are transactions in which a Fund purchases securities from a bank or
recognized securities dealer and simultaneously commits to resell the securities
to the bank or dealer at an agreed-upon date and price reflecting a market rate
of interest unrelated to the coupon rate or maturity of the purchased
securities. Repurchase agreements carry certain risks not associated with direct
investments in securities, including possible decline in the market value of the
underlying securities and delays and costs to the Fund if the other party to the
repurchase agreement becomes insolvent. Each Fund intends to enter into
repurchase agreements only with banks and dealers in transactions believed by
Mitchell Hutchins or PIMCO to present minimum credit risks in accordance with
guidelines established by the Trust's board of trustees.
 
WHEN-ISSUED AND DELAYED DELIVERY SECURITIES. Each Fund may purchase debt
securities, including mortgage- and asset-backed securities, on a 'when-issued'
basis or may purchase or sell securities for 'delayed delivery'. In when-issued
or delayed delivery transactions, delivery of the securities occurs beyond
normal settlement period, but the Fund generally would not pay for such
securities or start earning interest on them until they are delivered. However,
when a Fund purchases securities on a when-issued or delayed delivery basis, it
immediately assumes the risks of ownership, including the risk of price
fluctuation. Failure by a counter party to deliver a security purchased on a
when-issued or delayed delivery basis may result in a loss or missed opportunity
to make an alternative investment. Depending on market conditions, a Fund's
when-issued and delayed delivery purchase commitments could cause its net asset
value per share to be more volatile, because such securities may increase the
 
                                      Prospectus Page 13
 

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<PAGE> 
 
   
- --------------------------------------------------------------------------------
              PAINEWEBBER   U.S. GOVERNMENT INCOME FUND
              PAINEWEBBER   LOW DURATION U.S. GOVERNMENT INCOME FUND
              PAINEWEBBER   INVESTMENT GRADE INCOME FUND
              PAINEWEBBER   HIGH INCOME FUND
    
 
amount by which the Fund's total assets, including the value of when-issued and
delayed delivery securities held by the Fund, exceed its net assets.
 
   
ILLIQUID SECURITIES.  Each Fund may invest up to 10% (15% for Low Duration
Income Fund) of its net assets in illiquid securities. The term 'illiquid
securities' for this purpose means securities that cannot be disposed of within
seven days in the ordinary course of business at approximately the price at
which the Fund has valued the securities. Under current guidelines of the staff
of the SEC, IOs and POs are considered illiquid. However, IO and PO classes of
fixed-rate mortgage-backed securities issued by the U.S. government or one of
its agencies or instrumentalities will not be considered illiquid if Mitchell
Hutchins has determined that they are liquid pursuant to guidelines established
by the Trust's board of trustees. Illiquid securities also are considered to
include, among other things, written OTC options, repurchase agreements with
maturities in excess of seven days and securities whose disposition is
restricted under the federal securities laws (other than 'Rule 144A' securities
that Mitchell Hutchins or PIMCO has determined to be liquid under procedures
approved by the Trust's board of trustees).
    
 
Rule 144A establishes a 'safe harbor' from the requirements of the Securities
Act of 1933 ('1933 Act'). Institutional markets for restricted securities have
developed as a result of Rule 144A, providing both readily ascertainable values
for restricted securities and the ability to liquidate an investment to satisfy
share redemption orders. An insufficient number of qualified institutional
buyers interested in purchasing Rule 144A-eligible restricted securities held by
a Fund, however, could affect adversely the marketability of such portfolio
securities and the Fund might be unable to dispose of such securities promptly
or at favorable prices.
 
   
A Fund may not be able to sell illiquid securities when Mitchell Hutchins or
PIMCO considers it desirable to do so or may have to sell such securities at a
price lower than could be obtained if they were more liquid. Also the sale of
illiquid securities may require more time and may result in higher dealer
discounts and other selling expenses than does the sale of securities that are
not illiquid. Illiquid securities may be more difficult to value due to the
unavailability of reliable market quotations for such securities.
    
 
   
LENDING OF PORTFOLIO SECURITIES.  Each Fund is authorized to lend up to 33 1/3%
of the total value of its portfolio securities to broker-dealers or
institutional investors that Mitchell Hutchins deems qualified. Lending
securities enables the Fund to earn additional income, but could result in a
loss or delay in recovering the securities.
    
 
DURATION.  Duration is a measure of the expected life of a fixed income security
that was developed as a more precise alternative to the concept 'term to
maturity.' Duration incorporates a bond's yield, coupon interest payments, final
maturity and call features into one measure and is one of the fundamental tools
used by Mitchell Hutchins or PIMCO, as applicable, in portfolio selection for
the Funds. Traditionally, a debt security's 'term to maturity' has been used as
a proxy for the sensitivity of the security's price to changes in interest rates
(which is the 'interest rate risk' or 'volatility' of the security). However,
'term to maturity' measures only the time until a debt security provides for a
final payment, taking no account of the pattern of the security's payments prior
to maturity. Duration is a measure of the expected life of a fixed income
security on a present value basis. Duration takes the length of the time
intervals between the present time and the time that the interest and the
principal payments are scheduled to be made or, in the case of a callable bond,
expected to be received, and weights them by the present values of the cash to
be received at each future point in time. For any fixed income security with
interest payments occurring prior to the payment of principal, duration is
always less than maturity. For example, depending upon its coupon and the level
of market yields, a U.S. treasury note with a remaining maturity of five years
might have a duration of 4.5 years. For mortgage-backed and other securities
that are subject to prepayments, put or call features or adjustable coupons, the
difference between the remaining stated maturity and the duration is likely to
be much greater.
 
Futures, options and options on futures have durations which, in general, are
closely related to the duration of the securities which underlie them. Holding
long futures or call option positions (backed by a segregated account of cash
and cash equivalents) will lengthen a Fund's duration by approximately the same
amount as would holding an equivalent amount of the underlying securities. Short
futures or put
 
                                      Prospectus Page 14
 

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<PAGE> 
 
   
- --------------------------------------------------------------------------------
              PAINEWEBBER   U.S. GOVERNMENT INCOME FUND
              PAINEWEBBER   LOW DURATION U.S. GOVERNMENT INCOME FUND
              PAINEWEBBER   INVESTMENT GRADE INCOME FUND
              PAINEWEBBER   HIGH INCOME FUND
    
 
options have durations roughly equal to the negative duration of the securities
that underlie these positions, and have the effect of reducing portfolio
duration by approximately the same amount as would selling an equivalent amount
of the underlying securities.
 
There are some situations in which the standard duration calculation does not
properly reflect the interest rate exposure of a security. For example, floating
and variable rate securities often have final maturities of ten or more years;
however, their interest rate exposure corresponds to the frequency of the coupon
reset. Another example where the interest rate exposure is not properly captured
by the standard duration calculation is the case of mortgage-backed securities.
The stated final maturity of such securities is generally 30 years, but current
prepayment rates are critical in determining the securities' interest rate
exposure. In these and other similar situations, Mitchell Hutchins and PIMCO
will use more sophisticated analytical techniques that incorporate the economic
life of a security into the determination of its duration and, therefore, its
interest rate exposure.
 
Duration allows Mitchell Hutchins or PIMCO to make certain predictions as to the
effect that changes in the level of interest rates will have on the value of a
Fund's portfolio. For example, when the level of interest rates increases by 1%,
a fixed income security having a positive duration of three years generally will
decrease in value by approximately 3%. Accordingly, if
Mitchell Hutchins or PIMCO calculates the duration of the Fund's portfolio as
being three years, it normally would expect the portfolio to change in value by
approximately 3% for every 1% change in the level of interest rates. However,
various factors, such as changes in anticipated prepayment rates, qualitative
considerations, market supply and demand, can cause particular securities to
respond somewhat differently to changes in interest rates than indicated in the
above example. Moreover, in the case of mortgage-backed and other complex
securities, duration calculations are estimates and are not precise. This is
particularly true during periods of market volatility. Accordingly, the net
asset value of a Fund's portfolio may vary in relation to interest rates by a
greater or lesser percentage than indicated by the above example.
 
PORTFOLIO TURNOVER.  Each Fund's portfolio turnover rate may vary greatly from
year to year and will not be a limiting factor when Mitchell Hutchins or PIMCO
deems portfolio changes appropriate. A higher turnover rate for a Fund (100% or
more) will involve correspondingly greater transaction costs, which will be
borne directly by the Fund, and may increase the potential for short-term
capital gains.
 
DERIVATIVES.  The Funds may invest in instruments or securities that commonly
are referred to as 'derivatives,' because their value depends on (or 'derives'
from) the value of an underlying asset, reference rate or index. Derivative
instruments include options, futures contracts, interest rate protection
contracts and similar instruments that may be used by the Funds in hedging and
related income strategies. There is only limited consensus as to what
constitutes a 'derivative' security. However, in Mitchell
Hutchins' and PIMCO's view, the derivative securities in which the Funds may
invest include 'stripped' securities, such as CATS and TIGRs, and specially
structured types of mortgage- and asset-backed securities, such as IOs, POs and
inverse floaters. The market value of derivative instruments and securities
sometimes is more volatile than that of other investments, and each type of
derivative may pose its own special risks. Mitchell Hutchins and PIMCO take
these risks into account in their management of the Funds.
 
   
OTHER INVESTMENT POLICIES.  Each Fund may hold up to 35% of its total assets in
cash or money market instruments for liquidity purposes or pending investment.
In addition, when Mitchell Hutchins or PIMCO believes unusual circumstances
warrant a defensive position, each Fund temporarily may commit all or any
portion of its assets to cash or money market instruments. Such instruments may
include obligations of the U.S. government, its agencies or instrumentalities,
commercial paper rated at least A-1 by S&P or Moody's (Low Duration Income Fund
and Investment Grade Income Fund) or without regard to rating (High Income
Fund), bank certificates of deposit, bankers' acceptances and repurchase
agreements secured by any of the foregoing. The money market investments of U.S.
Government Income Fund are limited to obligations of the U.S. government, its
agencies and instrumentalities and repurchase agreements secured by such
obligations. The Funds may also engage in short sales of securities 'against the
box' to defer realization of gains or losses for tax purposes.
    
 
                                      Prospectus Page 15
 

<PAGE>
<PAGE> 
 
   
- --------------------------------------------------------------------------------
              PAINEWEBBER   U.S. GOVERNMENT INCOME FUND
              PAINEWEBBER   LOW DURATION U.S. GOVERNMENT INCOME FUND
              PAINEWEBBER   INVESTMENT GRADE INCOME FUND
              PAINEWEBBER   HIGH INCOME FUND
    
 
   
Investment Grade Income Fund and High Income Fund each may enter into reverse
repurchase agreements with banks and dealers and may borrow money for temporary
or emergency purposes, but not in excess of 10% of its total assets. Investment
Grade Income Fund and High Income Fund each may invest up to 5% of its net
assets in participations in, or assignments of, all or a portion of secured or
unsecured fixed or floating rate loans arranged through private negotiations
between a borrowing corporation and one or more financial institutions.
    
 
New types of mortgage- and asset-backed securities, derivative securities,
hedging instruments and risk management techniques are developed and marketed
from time to time. Each Fund may invest in these securities and instruments and
use these techniques to the extent consistent with its investment objective and
limitations and with regulatory and tax considerations.
 
- --------------------------------------------------------------------------------
                                   PURCHASES
- --------------------------------------------------------------------------------
 
Class Y shares are sold to eligible investors at the net asset value next
determined (see 'Valuation of Shares') after the purchase order is received at
PaineWebber's New York City offices, or, with respect to U.S. Government Income
Fund, for purchases by the trustee of the PW SIP, by the Fund's transfer agent
('Transfer Agent'). No initial or contingent deferred sales charges is imposed,
nor are Class Y shares subject to Rule 12b-1 distribution or service fees.
Mitchell Hutchins is the distributor of the Fund's shares and has appointed
PaineWebber Incorporated ('PaineWebber') as the exclusive dealer for the sale of
those shares. Each Fund and Mitchell Hutchins reserve the right to reject any
purchase order and to suspend the offering of the Class Y shares for a period of
time.
 
PURCHASES BY INSIGHT PARTICIPANTS.  An investor who purchases $50,000 or more of
shares of mutual funds that are available to INSIGHT participants (which include
the PaineWebber mutual funds in the Flexible Pricing System SM and certain
specified other mutual funds) may take part in INSIGHT, a total portfolio asset
allocation program sponsored by PaineWebber, and thus become eligible to
purchase Class Y shares. INSIGHT offers comprehensive investment services,
including a personalized asset allocation investment strategy using an
appropriate combination of funds, monitoring of investment performance and
comprehensive quarterly reports that cover market trends, portfolio summaries
and personalized account information. Participation in INSIGHT is subject to
payment of an advisory fee to PaineWebber at the maximum annual rate of 1.50% of
assets held through the program (generally charged quarterly in advance), which
covers all INSIGHT investment advisory services and program administration fees.
Employees of PaineWebber and its affiliates are entitled to a 50% reduction in
the fee otherwise payable for participation in INSIGHT. INSIGHT clients may
elect to have their INSIGHT fees charged to their PaineWebber accounts (by the
automatic redemption of money market fund shares) or, if a qualified plan,
invoiced. Please contact your PaineWebber investment executive or PaineWebber's
correspondent firms or call 1-800-647-1568 for more information concerning
mutual funds that are available to INSIGHT participants or for other INSIGHT
information.
 
PURCHASES BY THE TRUSTEE OF THE PW SIP. Class Y shares of U.S. Government Income
Fund also are offered for sale to the trustee of the PW SIP, a defined
contribution plan sponsored by Paine Webber Group Inc. ('PW Group'). The trustee
of the PW SIP purchases these Class Y shares to implement the investment choices
of individual plan participants with respect to their PW SIP contributions.
Individual plan participants should consult the Plan Information Statement and
Summary Plan Description of the PW SIP (collectively, 'Plan Documents') for a
description of the procedures and limitations applicable to making and changing
investment choices. Copies of the Plan Documents are available from the
PaineWebber Incorporated Benefits Department, 10th Floor, 1000 Harbor Boulevard,
Weehawken, New Jersey 07087 (telephone 1-201-902-4444).
 
                                      Prospectus Page 16
 

<PAGE>
<PAGE> 
 
   
- --------------------------------------------------------------------------------
              PAINEWEBBER   U.S. GOVERNMENT INCOME FUND
              PAINEWEBBER   LOW DURATION U.S. GOVERNMENT INCOME FUND
              PAINEWEBBER   INVESTMENT GRADE INCOME FUND
              PAINEWEBBER   HIGH INCOME FUND
    
 
As described in the Plan Documents, the average net asset value per share at
which Class Y shares of U.S. Government Income Fund are purchased by the trustee
of the PW SIP for the accounts of individual participants might be more or less
than the net asset value per share prevailing at the time that such participants
made their investment choices or made their contributions to the PW SIP.

ACQUISITION OF CLASS Y SHARES BY OTHERS.  Certain present holders of Class Y
shares who are not current INSIGHT participants may acquire Class Y shares of
the Fund. This category includes former employees of Kidder, Peabody & Co.,
Incorporated, their associated accounts and present and former directors and
trustees of the former Mitchell Hutchins, Kidder, Peabody mutual funds.
 
The Funds are authorized to offer Class Y shares to other employee benefit and
retirement plans of PW Group and its affiliates and certain investment programs
that are sponsored by PaineWebber and that may invest in PaineWebber mutual
funds. At present, however, INSIGHT participants and the PW SIP are the only
purchasers in these categories.
 
- --------------------------------------------------------------------------------
                                  REDEMPTIONS
- --------------------------------------------------------------------------------
 
Class Y shares may be redeemed at their net asset value and redemption proceeds
will be paid after receipt of a redemption request, as described below.
 
REDEMPTIONS THROUGH PAINEWEBBER OR CORRESPONDENT FIRMS.  INSIGHT participants
who are Class Y shareholders may submit redemption requests to their investment
executives or correspondent firms in person or by telephone, mail or wire. As
each Fund's agent, PaineWebber may honor a redemption request by repurchasing
Class Y shares from a redeeming shareholder at the shares' net asset value next
determined after receipt of the request by PaineWebber's New York City offices.
Within three Business Days after receipt of the request, repurchase proceeds
will be paid by check or credited to the shareholder's brokerage account at the
election of the shareholder. PaineWebber investment executives and correspondent
firms are responsible for promptly forwarding redemption requests to
PaineWebber's New York City offices. A 'Business Day' is any day, Monday through
Friday, on which the New York Stock Exchange, Inc. ('NYSE') is open for
business.

PaineWebber reserves the right not to honor any redemption request, in which
case PaineWebber promptly will forward the request to the Transfer Agent for
treatment as described below.
 
REDEMPTION THROUGH THE TRANSFER AGENT.  Shareholders also may redeem Class Y
shares through each Fund's transfer agent, PFPC Inc. ('Transfer Agent').
Shareholders should mail redemption requests directly to the Transfer Agent:
PFPC Inc., Attn: PaineWebber Mutual Funds, P.O. Box 8950, Wilmington, Delaware
19899. A redemption request will be executed at the net asset value next
computed after it is received in 'good order,' and redemption proceeds will be
paid within seven days of the receipt of the request. 'Good order' means that
the request must be accompanied by the following: (1) a letter of instruction or
a stock assignment specifying the number of shares or amount of investment to be
redeemed (or that all shares credited to the Fund account be redeemed), signed
by all registered owners of the shares in the exact names in which they are
registered, (2) a guarantee of the signature of each registered owner by an
eligible institution acceptable to the Transfer Agent and in accordance with SEC
rules, such as a commercial bank, trust company or member of a recognized stock
exchange and (3) other supporting legal documents for estates, trusts,
guardianships, custodianships, partnerships and corporations. Shareholders are
responsible for ensuring that a request for redemption is received in 'good
order.'
 
REDEMPTIONS FOR PARTICIPANTS IN PW SIP.  The trustee of the PW SIP redeems Class
Y shares of U.S. Government Income Fund to implement the investment choices of
individual plan participants with respect to their PW SIP contributions, as
described in the Plan Documents referenced under 'Purchases' above. As described
in the Plan Documents, the average net asset value per
 
                                      Prospectus Page 17
 

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<PAGE> 
 
   
- --------------------------------------------------------------------------------
              PAINEWEBBER   U.S. GOVERNMENT INCOME FUND
              PAINEWEBBER   LOW DURATION U.S. GOVERNMENT INCOME FUND
              PAINEWEBBER   INVESTMENT GRADE INCOME FUND
              PAINEWEBBER   HIGH INCOME FUND
    
 

share at which Class Y shares are redeemed by the trustee of the PW SIP might be
more or less than the net asset value per share prevailing at the time that such
participants made their investment choices.
 
ADDITIONAL INFORMATION ON REDEMPTIONS.  A shareholder (other than a participant
in the PW SIP) may have redemption proceeds of $1 million or more wired to the
shareholder's PaineWebber brokerage account or a commercial bank account
designated by the shareholder. Questions about this option, or redemption
requirements generally, should be referred to the shareholder's PaineWebber
investment executive or correspondent firm. If a shareholder requests redemption
of shares which were purchased recently, a Fund may delay payment until it is
assured that good payment has been received. In the case of purchases by check,
this can take up to 15 days.
 
Because each Fund incurs certain fixed costs in maintaining shareholder
accounts, it reserves the right to redeem all Fund shares in any shareholder
account having a net asset value below the lesser of $500 or the current minimum
for initial purchases. If a Fund elects to do so, it will notify the shareholder
and provide the shareholder the opportunity to increase the amount invested to
the minimum required level or more within 60 days of the notice. A Fund will not
redeem accounts that fall below the minimum required level solely as a result of
a reduction in net asset value per share.
 
- --------------------------------------------------------------------------------
                              DIVIDENDS AND TAXES
- --------------------------------------------------------------------------------
 
DIVIDENDS.  Dividends from each Fund's net investment income are declared daily
and paid monthly on or about the 15th day of each month. Net investment income
includes accrued interest and discount, less amortization of premium and accrued
expenses. Substantially all of each Fund's net capital gain (the excess of net
long-term capital gain over net short-term capital loss) and net short-term
capital gain, if any, are distributed annually. A Fund may make additional
distributions if necessary to avoid a 4% excise tax on undistributed income and
capital gain.
 
PW SIP PARTICIPANTS:  Dividends and other distributions are paid in additional
U.S. Government Income Fund Class Y shares at net asset value unless the
Transfer Agent is instructed otherwise.

INSIGHT PARTICIPANTS:  Dividends and capital gain distributions are paid in
additional Class Y shares at net asset value unless the shareholder has
requested cash payments. Shareholders who wish to receive dividends and/or other
distributions in cash, either mailed to the shareholder by check or credited to
the shareholder's PaineWebber account, should contact their PaineWebber
investment executives or correspondent firms.
 
TAXES.  Each Fund intends to continue to qualify for treatment as a regulated
investment company under the Internal Revenue Code so that it will be relieved
of federal income tax on that part of its investment company taxable income
(consisting generally of net investment income and net short-term capital gain)
and net capital gain that is distributed to its shareholders.
 
Each Fund notifies its shareholders following the end of each calendar year of
the amounts of dividends and capital gain distributions paid (or deemed paid)
that year.
 
PW SIP PARTICIPANTS.  Qualified profit-sharing plans such as the PW SIP pay no
federal income tax. Individual participants in the PW SIP should consult the
Plan Documents and their own tax advisers for information on the tax
consequences associated with participating in the PW SIP.
 
   
INSIGHT PARTICIPANTS:  Dividends from a Fund's investment company taxable income
(whether paid in cash or in additional shares) generally are taxable to its
shareholders as ordinary income. Distributions of a Fund's net capital gain
(whether paid in cash or in additional shares) are taxable to its shareholders
as long-term capital gain, regardless of how long they have held their shares.
Shareholders not subject to tax on their income generally will not be required
to pay tax on amounts distributed to them.
    
 
                                      Prospectus Page 18
 

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<PAGE> 
 
   
- --------------------------------------------------------------------------------
              PAINEWEBBER   U.S. GOVERNMENT INCOME FUND
              PAINEWEBBER   LOW DURATION U.S. GOVERNMENT INCOME FUND
              PAINEWEBBER   INVESTMENT GRADE INCOME FUND
              PAINEWEBBER   HIGH INCOME FUND
    
 
Each Fund is required to withhold 31% of all dividends, capital gain
distributions and redemption proceeds payable to any individuals and certain
other noncorporate shareholders who do not provide the Fund with a correct
taxpayer identification number. Withholding at that rate also is required from
dividends and capital gain distributions payable to such shareholders who
otherwise are subject to backup withholding.
 
A redemption of shares of a Fund may result in taxable gain or loss to the
redeeming shareholder, depending on whether the redemption proceeds payable to
the shareholder are more or less than the shareholder's adjusted basis for the
redeemed shares. An exchange of Fund shares for shares of another PaineWebber
mutual fund generally will have similar tax consequences. In addition, if shares
of a Fund are purchased within 30 days before or after redeeming other Fund
shares at a loss, all or a portion of that loss will not be deductible and will
increase the basis of the newly acquired shares.
 
The foregoing is only a summary of some of the important federal tax
considerations generally affecting the Fund and its shareholders; see the
Statement of Additional Information for a further discussion. There may be other
federal, state or local tax considerations applicable to a particular investor.
Prospective investors are urged to consult their tax advisers.
 
- --------------------------------------------------------------------------------
                              VALUATION OF SHARES
- --------------------------------------------------------------------------------
 
The net asset value of each Fund's shares fluctuates and is determined as of the
close of regular trading on the NYSE (currently 4:00 p.m., Eastern time) each
Business Day. Net asset value per share is computed by dividing the value of the
securities held by the Fund plus any cash or other assets minus all liabilities
by the total number of Fund shares outstanding.
 
   
Each Fund values its assets based on their current market value when market
quotations are readily available. If such value cannot be established, assets
are valued at fair value as determined in good faith by or under the direction
of the Trust's board of trustees. The amortized cost method of valuation
generally is used to value debt obligations with 60 days or less remaining to
maturity, unless the board of trustees determines that this does not represent
fair value. Investments of High Income Fund denominated in foreign currencies
are valued daily in U.S. dollars based on the then-prevailing exchange rate. It
should be recognized that judgment plays a greater role in valuing lower rated
debt securities in which High Income Fund and Investment Grade Income Fund may
invest, because there is less reliable, objective data available.
    
 
- --------------------------------------------------------------------------------
                                   MANAGEMENT
- --------------------------------------------------------------------------------
 
   
The Trust's board of trustees, as part of its overall management responsibility,
oversees various organizations responsible for each Fund's day-to-day
management. Mitchell Hutchins, investment adviser and administrator for each
Fund, supervises all aspects of the Fund's operations, makes and implements all
investment decisions for U.S. Government Income Fund, Investment Grade Income
Fund and High Income Fund and supervises the activities of PIMCO as sub-adviser
for Low Duration Income Fund. Mitchell Hutchins receives a monthly fee for these
services at the annual rate of 0.50% of each Fund's average daily net assets.
    
 
PIMCO, as sub-adviser for Low Duration Income Fund, makes and implements all
investment decisions for that Fund. Under the sub-advisory contract, Mitchell
Hutchins (not the Fund) pays PIMCO a fee for its services as sub-adviser at the
annual rate of 0.25% of the Fund's average daily net assets.
 
                                      Prospectus Page 19
 
 

<PAGE>
<PAGE> 
   
- --------------------------------------------------------------------------------
              PAINEWEBBER   U.S. GOVERNMENT INCOME FUND
              PAINEWEBBER   LOW DURATION U.S. GOVERNMENT INCOME FUND
              PAINEWEBBER   INVESTMENT GRADE INCOME FUND
              PAINEWEBBER   HIGH INCOME FUND
    
 
Each Fund also pays PaineWebber an annual fee of $4.00 per active shareholder
account held at PaineWebber for certain services not provided by the Transfer
Agent. The Funds incur other expenses, such as custody and transfer agency fees,
brokerage commissions, professional fees, expenses of board and shareholder
meetings, fees and expenses relating to registration of its shares, taxes and
governmental fees, fees and expenses of the trustees, costs of obtaining
insurance, expenses of printing distributed shareholder materials, and
extraordinary expenses including costs or losses in any litigation. For the
fiscal year ended November 30, 1995, U.S. Government Income Fund's expenses for
its Class Y shares, stated as a percentage of average net assets was 0.71%. For
the fiscal period October 20, 1995 (commencement of offering) to November 30,
1995, Low Duration Income Fund's expenses for its Class Y shares, stated as a
percentage of average net assets and annualized, was 0.99%.
 
   
Mitchell Hutchins is located at 1285 Avenue of the Americas, New York, New York
10019. It is a wholly owned subsidiary of PaineWebber, which is in turn wholly
owned by PW Group, the sponsor of the PW SIP and a publicly owned financial
services holding company. At              , 1996, Mitchell Hutchins was adviser
or sub-adviser to   investment companies with   separate portfolios and
aggregate assets of over $    billion.
    
 
   
PIMCO is located at 840 Newport Center Drive, Suite 360, Newport Beach,
California 92660. PIMCO is a subsidiary of PIMCO Advisors L.P., a publicly held
investment advisory firm. As of       , 1996, PIMCO had approximately $  billion
in assets under management and was adviser or sub-adviser of investment
companies with   portfolios and aggregate assets of approximately $   billion.
    
   
Nirmal Singh and Craig M. Varrelman have been responsible for the day-to-day
management of U.S. Government Income Fund's portfolio since December 1994. Mr.
Singh and Mr. Varrelman are both first vice presidents of Mitchell Hutchins.
Prior to joining Mitchell Hutchins in September 1993, Mr. Singh was with Merrill
Lynch Asset Management, Inc., where he was a member of the portfolio management
team. From 1990 to 1993, Mr. Singh was a senior portfolio manager at Nomura
Mortgage Fund Management Corporation. Mr. Varrelman has been with Mitchell
Hutchins as a portfolio manager since 1988.
    
 
   
William C. Powers, a Managing Director of PIMCO, is responsible for the
day-to-day management of Low Duration Income Fund's portfolio. Mr. Powers has
participated in the management of the portfolio since PIMCO assumed sub-advisory
responsibilities for the Fund in October 1994. Since 1991, Mr. Powers has been a
senior member of the fixed income portfolio management group of PIMCO. He was
previously associated with Salomon Brothers Inc and Bear Stearns as a Senior
Managing Director.
    
 
   
James F. Keegan and Julieanna Berry are responsible for the day-to-day
management of Investment Grade Income Fund's portfolio. Mr.
Keegan is a senior vice president of Mitchell Hutchins. Prior to joining
Mitchell Hutchins in March 1996, Mr. Keegan was a director with
Merrion Group, L.P. From 1987 to 1994, he was a vice president of global
investment management of Bankers Trust Company. Mrs. Berry is a vice president
of Mitchell Hutchins and has been employed as a portfolio manager since 1989.
Mrs Berry has held her fund responsibilities since June 1995.
    
 
   
Thomas J. Libassi has been responsible for the day-to-day management of High
Income Fund's portfolio since May 1994. Mr. Libassi is a senior vice president
of Mitchell Hutchins. Prior to May 1994, Mr. Libassi was a vice president of
Keystone Custodian Funds Inc. with portfolio management responsibility for
approximately $900 million in assets primarily invested in high yield debt
securities.
    
 
   
Other members of Mitchell Hutchins' domestic fixed income and high yield groups
provide input on market outlook, interest rate factors and other considerations
pertaining to fixed income investments for U.S. Government Income Fund,
Investment Grade Income Fund and High Income Fund.
    
 
Mitchell Hutchins and PIMCO investment personnel may engage in securities
transactions for their own accounts pursuant to codes of ethics which establish
procedures for personal investing and restrict certain transactions.
 
                                      Prospectus Page 20
 

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- --------------------------------------------------------------------------------
              PAINEWEBBER   U.S. GOVERNMENT INCOME FUND
              PAINEWEBBER   LOW DURATION U.S. GOVERNMENT INCOME FUND
              PAINEWEBBER   INVESTMENT GRADE INCOME FUND
              PAINEWEBBER   HIGH INCOME FUND
    
 
- --------------------------------------------------------------------------------
                            PERFORMANCE INFORMATION
- --------------------------------------------------------------------------------
 
Each Fund performs a standardized computation of annualized total return and may
show this return in advertisements or promotional materials. Standardized return
shows the change in value of an investment in the Fund as a steady compound
annual rate of return. Actual year-by-year returns fluctuate and may be higher
or lower than standardized return. One-, five- and ten-year periods will be
shown, unless the Class has been in existence for a shorter period. Total return
calculations assume reinvestment of dividends and other distributions.
 
Each Fund may use other total return presentations in conjunction with
standardized return. These may cover the same or different periods than those
used for standardized return and may include cumulative returns, average annual
rates, actual year-by-year rates or any combination thereof.
 
Each Fund also may advertise its yield. Yield reflects investment income net of
expenses over a 30-day (or one-month) period on a Class Y share, expressed as an
annualized percentage of the net asset value per share at the end of the period.
Yield computations differ from other accounting methods and therefore may differ
from dividends actually paid or reported net income.
 
Total return and yield information reflect past performance and do not
necessarily indicate future results. Investment return and principal values will
fluctuate, and proceeds upon redemption may be more or less than a shareholder's
cost.
 
- --------------------------------------------------------------------------------
                              GENERAL INFORMATION
- --------------------------------------------------------------------------------
 
   
ORGANIZATION.  PaineWebber Managed Investments Trust is registered with the SEC
as an open-end management investment company and was organized as a business
trust under the laws of the Commonwealth of Massachusetts by Declaration of
Trust dated November 21, 1986. The trustees have authority to issue an unlimited
number of shares of beneficial interest of separate series, par value $.001 per
share. Shares of five series, including the Funds, have been authorized.
    
The shares of beneficial interest of each Fund are divided into four classes,
designated Class A, Class B, Class C and Class Y shares. Each Class represents
interests in the same assets of the Fund. Class A, B and C differ as follows:
(1) each Class has exclusive voting rights on matters pertaining to its plan of
distribution, (2) Class A shares generally are subject to an initial sales
charge, (3) Class B shares bear ongoing distribution fees, may be subject to a
contingent deferred sales charge upon most redemptions and will automatically
convert to Class A shares approximately six years after issuance, (4) Class C
shares are not subject to an initial sales charge, but are subject to a
contingent deferred sales charge if redeemed within one year of purchase, bear
ongoing distribution fees and do not convert into another Class and (5) each
Class may bear differing amounts of certain Class-specific expenses. Class Y
shares are subject to neither an initial or contingent deferred sales charge nor
ongoing service or distribution fees.
 
The different sales charges and other expenses applicable to the different
Classes of each Fund's shares may affect the performance of those Classes. More
information concerning the other Classes of shares of the Funds may be obtained
from a PaineWebber investment executive or correspondent firm or by calling
1-800-647-1568.
 
The Trust does not hold annual shareholder meetings. There normally will be no
meetings of shareholders to elect trustees unless fewer than a majority of the
trustees of the Trust holding office have been elected by shareholders.
Shareholders of record holding at least two-thirds of
 
                                      Prospectus Page 21
 

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              PAINEWEBBER   U.S. GOVERNMENT INCOME FUND
              PAINEWEBBER   LOW DURATION U.S. GOVERNMENT INCOME FUND
              PAINEWEBBER   INVESTMENT GRADE INCOME FUND
              PAINEWEBBER   HIGH INCOME FUND
    
 

the outstanding shares of the Trust may remove a trustee by votes cast in person
or by proxy at a meeting called for that purpose. The trustees are required to
call a meeting of shareholders for the purpose of voting upon the question of
removal of any trustee when so requested in writing by the shareholders of
record holding at least 10% of the Trust's outstanding shares. Each share of a
Fund has equal voting rights, except as noted above. Each share of a Fund is
entitled to participate equally in dividends and other distributions and the
proceeds of any liquidation except that, due to the differing expenses borne by
the four Classes, these dividends and proceeds are likely to be lower for the
other Classes than for the Class Y shares. The shares of each Fund and the other
series of the Trust will be voted separately except when an aggregate vote of
all series is required by the Investment Company Act of 1940 ('1940 Act').

To avoid additional operating costs and for investor convenience, share
certificates are not issued. Ownership of shares of each Fund is re corded on a
share register by the Transfer Agent and shareholders have the same rights of
ownership with respect to such shares as if certificates had been issued.
 
   
CUSTODIAN AND TRANSFER AGENT.  State Street Bank and Trust Company, One Heritage
Drive, North Quincy, Massachusetts 02171 is custodian of each Fund's assets and
employs foreign sub-custodians approved by the Trust's board of trustees in
accordance with the applicable requirements of the 1940 Act, to provide custody
of High Income Fund's foreign assets. PFPC Inc., a subsidiary of PNC Bank,
National Association, whose principal business address is 103 Bellevue Parkway,
Wilmington, Delaware 19809, is each Fund's transfer and dividend disbursing
agent.
    
 
CONFIRMATIONS AND STATEMENTS.  Shareholders receive confirmations of purchases
and redemptions of shares of the Funds. PaineWebber clients receive statements
at least quarterly that report their activity and consolidated year-end
statements that show all Fund transactions for that year. Shareholders also
receive audited annual and semi-annual financial statements. The PW SIP receives
confirmations of purchases and redemptions of shares of the U.S. Government
Income Fund and quarterly statements from the Transfer Agent. The PW SIP also
receives audited annual and unaudited semi-annual financial statements of the
U.S. Government Income Fund. PW SIP participants receive periodic information,
including quarterly statements, about their plan participation from the PW SIP
plan administrator.
 
   
- --------------------------------------------------------------------------------
                                   APPENDIX A
                           MORTGAGE-BACKED SECURITIES
- --------------------------------------------------------------------------------
    
 
MORTGAGE-BACKED SECURITIES
 
   
The U.S. government securities in which U.S. Government Income Fund, Low
Duration Income Fund and Investment Grade Income Fund may invest include
mortgage-backed securities issued or guaranteed by Ginnie Mae, Fannie Mae or
Freddie Mac. While these mortgage-backed securities may be guaranteed as to
payment of interest and principal, they are not guaranteed as to market value.
Other mortgage-backed securities in which the Funds may invest will be issued by
Private Mortgage Lenders. Such private mortgage-backed securities may be
supported by pools of mortgage loans or other mortgage-backed securities that
are guaranteed, directly or indirectly, by the U.S. government or one of its
agencies or instrumentalities, or they may be issued without any government
guarantee of the underlying mortgage assets but with some form of non-government
credit enhancement. New types of mortgage-backed securities are developed and
marketed from time to time and, consistent with its investment limitations, the
Funds expect to invest in those new types of mortgage-backed securities that
Mitchell Hutchins or PIMCO believes may assist the Funds in achieving their
investment objective. Similarly, the Funds may invest in mortgage-backed
securities issued by new or
    
 
                                      Prospectus Page 22
 

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              PAINEWEBBER   U.S. GOVERNMENT INCOME FUND
              PAINEWEBBER   LOW DURATION U.S. GOVERNMENT INCOME FUND
              PAINEWEBBER   INVESTMENT GRADE INCOME FUND
              PAINEWEBBER   HIGH INCOME FUND
    
 
existing governmental or private issuers other than those identified herein.
 
GINNIE MAE CERTIFICATES.  Ginnie Mae guarantees certain mortgage pass-through
certificates ('Ginnie Mae certificates') that are issued by Private Mortgage
Lenders and that represent ownership interests in individual pools of
residential mortgage loans. These securities are designed to provide monthly
payments of interest and principal to the investor. Timely payment of interest
and principal is backed by the full faith and credit of the U.S. government.
Each mortgagor's monthly payments to his lending institution on his residential
mortgage are 'passed through' to certificateholders such as the Funds. Mortgage
pools consist of whole mortgage loans or participations in loans. The terms and
characteristics of the mortgage instruments are generally uniform within a pool
but may vary among pools. Lending institutions that originate mortgages for the
pools are subject to certain standards, including credit and other underwriting
criteria for individual mortgages included in the pools.
 
FANNIE MAE CERTIFICATES.  Fannie Mae facilitates a national secondary market in
residential mortgage loans insured or guaranteed by U.S. government agencies and
in privately insured or uninsured residential mortgage loans (sometimes referred
to as 'conventional mortgage loans' or 'conventional loans') through its
mortgage purchase and mortgage-backed securities sales activities. Fannie Mae
issues guaranteed mortgage pass-through certificates ('Fannie Mae
certificates'), which represent pro rata shares of all interest and principal
payments made and owed on the underlying pools. Fannie Mae guarantees timely
payment of interest and principal on Fannie Mae certificates. The Fannie Mae
guarantee is not backed by the full faith and credit of the U.S. government.
 
FREDDIE MAC CERTIFICATES.  Freddie Mac also facilitates a national secondary
market for conventional residential and U.S. government-insured mortgage loans
through its mortgage purchase and mortgage-backed securities sales activities.
Freddie Mac issues two types of mortgage pass-through securities: mortgage
participation certificates ('PCs') and guaranteed mortgage certificates
('GMCs'). Each PC represents a pro rata share of all interest and principal
payments made and owed on the underlying pool. Freddie Mac generally guarantees
timely monthly payment of interest on PCs and the ultimate payment of principal,
but it also has a PC program under which it guarantees timely payment of both
principal and interest. GMCs also represent a pro rata interest in a pool of
mortgages. These instruments, however, pay interest semi-annually and return
principal once a year in guaranteed minimum payments. The Freddie Mac guarantee
is not backed by the full faith and credit of the U.S. government.
 
PRIVATE, RTC AND SIMILAR MORTGAGE-BACKED SECURITIES.  Mortgage-backed securities
issued by Private Mortgage Lenders are structured similarly to the pass-through
certificates and collateralized mortgage obligations ('CMOs') issued or
guaranteed by Ginnie Mae, Fannie Mae and Freddie Mac. Such mortgage-backed
securities may be supported by pools of U.S. government or agency insured or
guaranteed mortgage loans or by other mortgage-backed securities issued by a
government agency or instrumentality, but they generally are supported by pools
of conventional (i.e., non-government guaranteed or insured) mortgage loans.
Since such mortgage-backed securities normally are not guaranteed by an entity
having the credit standing of Ginnie Mae, Fannie Mae and Freddie Mac, they
normally are structured with one or more types of credit enhancement. See
' -- Types of Credit Enhancement.' These credit enhancements do not protect
investors from changes in market value.
 
The Resolution Trust Corporation ('RTC'), which was organized by the U.S.
government in connection with the savings and loan crisis, held assets of failed
savings associations as either a conservator or receiver for such associations,
or it acquired such assets in its corporate capacity. These assets included,
among other things, single family and multifamily mortgage loans, as well as
commercial mortgage loans. In order to dispose of such assets in an orderly
manner, RTC established a vehicle registered with the SEC through which it sold
mortgage-backed securities. RTC mortgage-backed securities represent pro rata
interests in pools of mortgage loans that RTC held or acquired, as described
above, and are supported by one or more of the types of private credit
enhancements used by Private Mortgage Lenders.
 
COLLATERALIZED MORTGAGE OBLIGATIONS AND MULTI-CLASS MORTGAGE
PASS-THROUGHS.  CMOs are debt obligations that are collateralized by mortgage
loans or mortgage pass-through securities (such collateral collectively being
called 'Mortgage
 
                                      Prospectus Page 23
 

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              PAINEWEBBER   U.S. GOVERNMENT INCOME FUND
              PAINEWEBBER   LOW DURATION U.S. GOVERNMENT INCOME FUND
              PAINEWEBBER   INVESTMENT GRADE INCOME FUND
              PAINEWEBBER   HIGH INCOME FUND
    
 
Assets'). CMOs may be issued by Private Mortgage Lenders or by government
entities such as Fannie Mae or Freddie Mac. Multi-class mortgage pass-through
securities are interests in trusts that are comprised of Mortgage Assets and
that have multiple classes similar to those in CMOs. Unless the context
indicates otherwise, references herein to CMOs include multi-class mortgage
pass-through securities. Payments of principal of and interest on the Mortgage
Assets (and in the case of CMOs, any reinvestment income thereon) provide the
funds to pay debt service on the CMOs or to make scheduled distributions on the
multi-class mortgage pass-through securities.
 
In a CMO, a series of bonds or certificates is issued in multiple classes. Each
class of CMO, also referred to as a 'tranche,' is issued at a specific fixed or
floating coupon rate and has a stated maturity or final distribution date.
Principal prepayments on the Mortgage Assets may cause CMOs to be retired
substantially earlier than their stated maturities or final distribution dates.
Interest is paid or accrues on all classes of a CMO (other than any principal
only ('PO') class) on a monthly, quarterly or semi-annual basis. The principal
and interest on the Mortgage Assets may be allocated among the several classes
of a CMO in many ways. In one structure, payments of principal, including any
principal prepayments, on the Mortgage Assets are applied to the classes of a
CMO in the order of their respective stated maturities or final distribution
dates so that no payment of principal will be made on any class of the CMO until
all other classes having an earlier stated maturity or final distribution date
have been paid in full. In some CMO structures, all or a portion of the interest
attributable to one or more of the CMO classes may be added to the principal
amounts attributable to such classes, rather than passed through to
certificateholders on a current basis, until other classes of the CMO are paid
in full.
 
Parallel pay CMOs are structured to provide payments of principal on each
payment date to more than one class. These simultaneous payments are taken into
account in calculating the stated maturity date or final distribution date of
each class, which, as with other CMO structures, must be retired by its stated
maturity date or final distribution date but may be retired earlier.

ARM AND FLOATING RATE MORTGAGE-BACKED SECURITIES.  ARM mortgage-backed
securities are mortgage-backed securities that represent a right to receive
interest payments at a rate that is adjusted to reflect the interest earned on a
pool of mortgage loans bearing variable or adjustable rates of interest (such
mortgage loans are referred to as 'ARMs'). Floating Rate mortgage-backed
securities are classes of mortgage-backed securities that have been structured
to represent the right to receive interest payments at rates that fluctuate in
accordance with an index but that generally are supported by pools comprised of
fixed-rate mortgage loans. Because the interest rates on ARM and Floating Rate
mortgage-backed securities are reset in response to changes in a specified
market index, the values of such securities tend to be less sensitive to
interest rate fluctuations than the values of fixed-rate securities.
 
TYPES OF CREDIT ENHANCEMENT.  To lessen the effect of failures by obligors on
Mortgage Assets to make payments, mortgage-backed securities may contain
elements of credit enhancement. Such credit enhancement falls into two
categories; (1) liquidity protection and (2) protection against losses resulting
after default by an obligor on the underlying assets and collection of all
amounts recoverable directly from the obligor and through liquidation of the
collateral. Liquidity protection refers to the provision of advances, generally
by the entity administering the pool of assets (usually the bank, savings
association or mortgage banker that transferred the underlying loans to the
issuer of the security), to ensure that the receipt of payments on the
underlying pool occurs in a timely fashion. Protection against losses resulting
after default and liquidation ensures ultimate payment of the obligations on at
least a portion of the assets in the pool. Such protection may be provided
through guarantees, insurance policies or letters of credit obtained by the
issuer or sponsor, from third parties, through various means of structuring the
transaction or through a combination of such approaches. The Fund will not pay
any additional fees for such credit enhancement, although the existence of
credit enhancement may increase the price of a security. Credit enhancements do
not provide protection against changes in the market value of the security.
 
Examples of credit enhancement arising out of the structure of the transaction
include 'senior-subordinated securities' (multiple class securities with one or
more classes subordinate to other classes as to the payment of principal thereof
and interest thereon, with the result that defaults
 
                                      Prospectus Page 24
 

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              PAINEWEBBER   U.S. GOVERNMENT INCOME FUND
              PAINEWEBBER   LOW DURATION U.S. GOVERNMENT INCOME FUND
              PAINEWEBBER   INVESTMENT GRADE INCOME FUND
              PAINEWEBBER   HIGH INCOME FUND
    
 
on the underlying assets are borne first by the holders of the subordinated
class), creation of 'spread accounts' or 'reserve funds' (where cash or
investments, sometimes funded from a portion of the payments on the underlying
assets, are held in reserve against future losses) and 'over-collateralization'
(where the scheduled payments on, or the principal amount of, the underlying
assets exceed that required to make payment of the securities and pay any
servicing or other fees). The degree of credit enhancement provided for each
issue generally is based on historical information regarding the level of credit
risk associated with the underlying assets. Delinquency or loss in excess of
that anticipated could adversely affect the return on an investment in such a
security.
 
   
- --------------------------------------------------------------------------------
                                   APPENDIX B
                                    RATINGS
- --------------------------------------------------------------------------------
    
 
   
DESCRIPTION OF MOODY'S CORPORATE BOND RATINGS
    
 
   
Aaa.  Bonds which are rated Aaa are judged to be of the best quality. They carry
the smallest degree of investment risk and are generally referred to as 'gilt
edged.' Interest payments are protected by a large or by an exceptionally stable
margin and principal is secure. While the various protective elements are likely
to change, such changes as can be visualized are most unlikely to impair the
fundamentally strong position of such issues.
    
 
   
Aa.  Bonds which are rated Aa are judged to be of high quality by all standards.
Together with the Aaa group they comprise what are generally known as high grade
bonds. They are rated lower than the best bonds because margins of protection
may not be as large as in Aaa securities or fluctuation of protective elements
may be of greater amplitude or there may be other elements present which make
the long-term risks appear somewhat larger than in Aaa securities.
    
 
   
A.  Bonds which are rated A possess many favorable investment attributes and are
to be considered as upper medium grade obligations. Factors giving security to
principal and interest are considered adequate but elements may be present which
suggest a susceptibility to impairment sometime in the future.
    
 
   
Baa.  Bonds which are rated Baa are considered as medium grade obligations,
i.e., they are neither highly protected nor poorly secured. Interest payments
and principal security appear adequate for the present but certain protective
elements may be lacking or may be characteristically unreliable over any great
length of time. Such bonds lack outstanding investment characteristics and in
fact have speculative characteristics as well.
    
 
   
Ba.  Bonds which are rated Ba are judged to have speculative elements; their
future cannot be considered as well assured. Often the protection of interest
and principal payments may be very moderate and thereby not well safeguarded
during both good and bad times over the future. Uncertainty of position
characterizes bonds in this class.
    
 
   
B.  Bonds which are rated B generally lack characteristics of the desirable
investment. Assurance of interest and principal payments or of maintenance of
other terms of the contract over any long period of time may be small.
    
 
   
Caa.  Bonds which are rated Caa are of poor standing. Such issues may be in
default or there may be present elements of danger with respect to principal or
interest.
    
 
   
Ca.  Bonds which are rated Ca represent obligations which are speculative in a
high degree. Such issues are often in default or have other marked shortcomings.
    
 
   
C.  Bonds which are rated C are the lowest rated class of bonds and issues so
rated can be regarded as having extremely poor prospects of ever attaining any
real investment standing.
    
 
   
Note:  Moody's may apply numerical modifiers, 1, 2 and 3 in each generic rating
classification from Aa through B in its corporate bond rating system. The
modifier 1 indicates that the security ranks in the higher end of its generic
rating category; the modifier 2 indicates a mid-range ranking; and the modifier
3 indicates that the issue
    
 
                                      Prospectus Page 25
 

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              PAINEWEBBER   U.S. GOVERNMENT INCOME FUND
              PAINEWEBBER   LOW DURATION U.S. GOVERNMENT INCOME FUND
              PAINEWEBBER   INVESTMENT GRADE INCOME FUND
              PAINEWEBBER   HIGH INCOME FUND
    
 
   
ranks in the lower end of its generic rating category.
    
 
   
DESCRIPTION OF S&P CORPORATE DEBT RATINGS
    
 
   
AAA.  Debt rated AAA has the highest rating assigned by S&P. Capacity to pay
interest and repay principal is extremely strong; AA. Debt rated AA has a very
strong capacity to pay interest and repay principal and differs from the highest
rated issues only in small degree; A. Debt rated A has a strong capacity to pay
interest and repay principal although it is somewhat more susceptible to the
adverse effects of changes in circumstances and economic conditions than debt in
higher rated categories.
    
 
   
BBB.  Debt rated BBB is regarded as having adequate capacity to pay interest and
repay principal. Whereas it normally exhibits adequate protection parameters,
adverse economic conditions or changing circumstances are more likely to lead to
a weakened capacity to pay interest and repay principal for debt in this
category than for debt in higher rated categories.
    
 
   
BB, B, CCC, CC, C.  Debt rated BB, B, CCC, CC and C is regarded, on balance, as
predominantly speculative with respect to capacity to pay interest and repay
principal in accordance with the terms of the obligation; BB indicates the
lowest degree of speculation and C the highest degree of speculation. While such
debt will likely have some quality and protective characteristics, these are
outweighed by large uncertainties or major risk exposures to adverse conditions.
    
 
   
CI.  The rating CI is reserved for income bonds on which no interest is being
paid.
    
 
   
D.  Debt rated D is in default, and payment of interest and/or repayment of
principal is in arrears.
    
 
   
PLUS (+) OR MINUS ( - ):  The ratings from 'AA' to 'CCC' may be modified by the
addition of a plus or minus sign to show relative standing within the major
rating categories.
    
 
   
NR:  'NR' indicates that no public rating has been requested, that there is
insufficient information on which to base a rating, or that S&P does nor rate a
particular type of obligation as matter of policy.
    
   
DESCRIPTION OF MOODY'S COMMERCIAL PAPER RATINGS
    
 
   
PRIME-1.  Issues assigned this highest rating have a superior ability for
repayment of senior short-term debt obligations. Prime-1 repayment ability will
often be evidenced by the following characteristics: leading market positions in
well established industries; high rates of return on funds employed;
conservative capitalization structures with moderate reliance on debt and ample
asset protection; broad margins in earnings coverage of fixed financial charges
and high internal cash generation; well established access to a range of
financial markets and assured sources of alternate liquidity.
    
 
   
PRIME-2.  Issuers assigned this rating have a strong ability for repayment of
senior short-term debt obligations. This will normally be evidenced by many of
the characteristics cited above but to a lesser degree. Earnings trends and
coverage ratios, while sound, will be more subject to variation. Capitalization
characteristics, while still appropriate, may be more affected by external
conditions. Ample alternate liquidity is maintained.
    
 
   
PRIME-3.  Issuers assigned this rating have an acceptable capacity for repayment
of short-term promissory obligations. The effect of industry characteristics and
market composition may be more pronounced. Variability in earnings and
profitability may result in changes in the level of debt protection measurements
and the requirement for relatively high financial leverage. Adequate alternate
liquidity is maintained.
    
 
   
NOT PRIME.  Issuers assigned this rating do not fall within any of the Prime
rating categories.
    
 
   
DESCRIPTION OF S&P COMMERCIAL PAPER RATINGS
    
 
   
A.  Issues assigned this highest rating are regarded as having the greatest
capacity for timely payment. Issues in this category are delineated with the
numbers 1, 2 and 3 to indicate the relative degree of safety; A-1. This
designation indicates that the degree of safety regarding timely payment is
either overwhelming or very strong. Those issues determined to possess
overwhelming safety characteristics are denoted with a plus (+) sign
designation; A-2. Capacity for timely payment on issues with this designation is
strong. However, the relative degree of safety is not as high as for issues
designated A-1; A-3. Issues carrying this designation have a satisfactory
capacity for timely payment. They are, however, somewhat more vulnerable to the
adverse effects of changes in circumstances than obligations carrying the higher
designations; B. Issues rated B are regarded as having only an adequate capacity
for timely payment. However, such capacity may be damaged by changing conditions
or short-term adversities; C. This rating is assigned to short-term debt
obligations with a doubtful capacity for payment; D. This rating indicates that
the issue is either in default or is expected to be in default upon maturity.
    
 
                                      Prospectus Page 26
 

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              PAINEWEBBER   U.S. GOVERNMENT INCOME FUND
              PAINEWEBBER   LOW DURATION U.S. GOVERNMENT INCOME FUND
              PAINEWEBBER   INVESTMENT GRADE INCOME FUND
              PAINEWEBBER   HIGH INCOME FUND
    
 
   
- --------------------------------------------------------------------------------
                                   APPENDIX C
- --------------------------------------------------------------------------------
    
 
   
The following are descriptions of instruments that one or more of the Funds may
use:
    
 
   
OPTIONS ON DEBT SECURITIES AND FOREIGN CURRENCIES.  A call option is a
short-term contract pursuant to which the purchaser of the option, in return for
a premium, has the right to buy the security or currency underlying the option
at a specified price at any time during the term of the option. The writer of
the call option, who receives the premium, has the obligation, upon exercise of
the option during the option term, to deliver the underlying security or
currency against payment of the exercise price. A put option is a similar
contract which gives its purchaser, in return for a premium, the right to sell
the underlying security or currency at a specified price during the option term.
The writer of the put option, who receives the premium, has the obligation, upon
exercise of the option during the option term, to buy the underlying security or
currency at the exercise price.
    
 
OPTIONS ON INDICES OF DEBT SECURITIES.  An index assigns relative values to the
securities included in the index and fluctuates with changes in the market
values of such securities. Index options operate in the same way as more
traditional options except that exercises of index options are effected with
cash payment and do not involve delivery of securities. Thus, upon exercise of
an index option, the purchaser will realize, and the writer will pay, an amount
based on the difference between the exercise price and the closing price of the
index.
   
DEBT SECURITY INDEX FUTURES CONTRACTS.  A debt security index futures contract
is a bilateral agreement pursuant to which one party agrees to accept, and the
other party agrees to make, delivery of an amount of cash equal to a specificed
dollar amount times the difference between the index value at the close of
trading of the contract and the price at which the futures contract is
originally struck. No physical delivery of the securities comprising the index
is made; generally, contracts are closed out prior to the expiration date of the
contract.
    
 
INTEREST RATE FUTURES CONTRACTS.  An interest rate futures contract is a
bilateral agreement pursuant to which one party agrees to make, and the other
party agrees to accept, delivery of the specified type of debt security called
for in the contract at a specified future time and at a specified price.
Although interest rate futures contracts by their terms call for actual delivery
or acceptance of debt securities, in most cases the contracts are closed out
before the settlement date without the making or taking of delivery.
 
OPTIONS ON FUTURES CONTRACTS.  Options on futures contracts are similar to
options on securities, except that an option on a futures contract gives the
purchaser the right, in return for the premium paid, to assume a position in a
futures contract (a long position if the option is a call and a short position
if the option is a put), rather than to purchase or sell a security, at a
specified price at any time during the option term. Upon exercise of the option,
the delivery of the futures position to the holder of the option will be
accompanied by delivery of the accumulated balance that represents the amount by
which the market price of the futures contract exceeds, in the case of a call,
or is less than, in the case of a put, the exercise price of the option on the
future. The writer of an option, upon exercise, will assume a short position in
the case of a call and a long position in the case of a put.
 
   
FORWARD CURRENCY CONTRACTS.  A forward currency contract involves an obligation
to purchase or sell a specific currency at a specified future date, which may be
any fixed number of days from the contract date agreed upon by the parties, at a
price set at the time the contract is entered into.
    
 
                                      Prospectus Page 27
 
 

<PAGE>
<PAGE>
 
'c'1996 PaineWebber Incorporated
 
[Recycle Logo]
       Printed on recycled paper
 
   PAINEWEBBER
   U.S. GOVERNMENT
   INCOME FUND
   LOW DURATION
   U.S. GOVERNMENT
 
   
INCOME FUND
INVESTMENT GRADE
INCOME FUND
HIGH INCOME FUND
CLASS Y SHARES
    
 
NO PERSON HAS BEEN AUTHORIZED TO GIVE ANY INFORMATION OR MAKE ANY
REPRESENTATIONS NOT CONTAINED IN THIS PROSPECTUS IN CONNECTION WITH THE
OFFERING MADE BY THIS PROSPECTUS AND, IF GIVEN OR MADE, SUCH INFORMATION OR
REPRESENTATIONS MUST NOT BE RELIED UPON AS HAVING BEEN AUTHORIZED BY THE
FUNDS OR THEIR DISTRIBUTOR. THIS PROSPECTUS DOES NOT CONSTITUTE AN OFFERING
BY THE FUNDS OR THEIR DISTRIBUTOR IN ANY JURISDICTION IN WHICH SUCH OFFERING
MAY NOT LAWFULLY BE MADE.
 
   
PROSPECTUS
July    , 1996
    


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                    PAINEWEBBER U.S. GOVERNMENT INCOME FUND
                    PAINEWEBBER LOW DURATION U.S. GOVERNMENT
                                  INCOME FUND
                    PAINEWEBBER INVESTMENT GRADE INCOME FUND
                          PAINEWEBBER HIGH INCOME FUND
                                 CLASS Y SHARES
                          1285 AVENUE OF THE AMERICAS
                            NEW YORK, NEW YORK 10019
    
 
                      STATEMENT OF ADDITIONAL INFORMATION
 
   
     The  four  Funds named  above  (each a  'Fund')  are diversified  series of
PaineWebber Managed Investments Trust ('Trust'), a professionally managed mutual
fund. PaineWebber U.S.  Government Income Fund  ('U.S. Government Income  Fund')
seeks to provide high current income consistent with the preservation of capital
and  liquidity and invests primarily  in U.S. government securities. PaineWebber
Low Duration U.S. Government Income Fund ('Low Duration Income Fund') seeks  the
highest  level of current income consistent with the preservation of capital and
low volatility  of net  asset value;  it invests  primarily in  U.S.  government
securities and seeks to limit the volatility of its net asset value per share by
maintaining,  under normal circumstances, an  overall portfolio duration of from
one to three years. PaineWebber Investment Grade Income Fund ('Investment  Grade
Income  Fund')  seeks  to  provide  high  current  income  consistent  with  the
preservation of capital and liquidity; it invests primarily in investment  grade
corporate  bonds and other fixed income securities. PaineWebber High Income Fund
('High Income  Fund') seeks  to  provide the  highest  level of  current  income
available  without undue risk; it invests  primarily in high risk, high yielding
medium and  lower  quality  corporate  bonds.  The  Funds'  investment  adviser,
administrator  and  distributor  is  Mitchell  Hutchins  Asset  Management  Inc.
('Mitchell Hutchins'),  a wholly  owned subsidiary  of PaineWebber  Incorporated
('PaineWebber').  As distributor for  the Fund, Mitchell  Hutchins has appointed
PaineWebber to serve as  exclusive dealer for the  sale of Fund shares.  Pacific
Investment Management Company ('PIMCO') serves as investment sub-adviser for Low
Duration  Income  Fund.  The  Class  Y shares  described  in  this  Statement of
Additional Information are currently offered for sale primarily to  participants
in  the INSIGHT Investment Advisory  Program ('INSIGHT'), when purchased through
that program. The Class Y shares of U.S. Government Income Fund also are offered
for sale to  the trustee of  the PaineWebber Savings  Investment Plan acting  on
behalf  of  that  Plan.  This  Statement  of  Additional  Information  is  not a
prospectus and  should be  read  only in  conjunction  with the  Funds'  current
Prospectus,  dated July    , 1996. A  copy of the Prospectus  may be obtained by
calling any PaineWebber investment executive or correspondent firm or by calling
toll-free 1-800-647-1568.  Participants in  the PaineWebber  Savings  Investment
Plan  may  obtain  a  copy  of  the  Prospectus  by  contacting  the PaineWebber
Incorporated Benefits Department, 1000 Harbor Boulevard, 10th Floor,  Weehawken,
New  Jersey 07087  or by  calling 1-201-902-4444.  This Statement  of Additional
Information is dated July   , 1996.
    
 

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<PAGE>
                      INVESTMENT POLICIES AND RESTRICTIONS
 
     The following  supplements  the  information contained  in  the  Prospectus
concerning the investment policies and limitations of the Funds.
 
   
     YIELD  FACTORS AND RATINGS.   Standard &  Poor's, a division  of The McGraw
Hill Companies, Inc.  ('S&P'), Moody's Investors  Service, Inc. ('Moody's')  and
other  nationally  recognized  statistical rating  organizations  ('NRSROs') are
private services that provide ratings of the credit quality of debt obligations.
A description of the ratings assigned to debt obligations by S&P and Moody's  is
included  in Appendix B to the Prospectus.  The process by which S&P and Moody's
determine  ratings   for   mortgage-  and   asset-backed   securities   includes
consideration  of  the likelihood  of  the receipt  by  security holders  of all
distributions, the nature of  the underlying securities,  the credit quality  of
the guarantor, if any, and the structural, legal and tax aspects associated with
such  securities. Not even the highest  such ratings represents an assessment of
the likelihood that  principal prepayments  will be  made by  mortgagors or  the
degree  to which such  prepayments may differ  from that originally anticipated,
nor do such ratings  address the possibility that  investors may suffer a  lower
than  anticipated yield or that investors in  such securities may fail to recoup
fully their initial investment due to prepayments.
    
 
   
     A Fund may use  these ratings in determining  whether to purchase, sell  or
hold  a security. It should be emphasized, however, that ratings are general and
are not absolute standards of  quality. Consequently, debt obligations with  the
same  maturity, interest rate and rating may have different market prices. Also,
rating agencies may fail to make timely changes in credit ratings in response to
subsequent events so that an issuer's current financial condition may be  better
or worse than the rating indicates. The rating assigned to a security by a NRSRO
does  not reflect an assessment of the volatility of the security's market value
or of the liquidity of an investment in the security. Subsequent to its purchase
by any fund, an issue  of debt obligations may cease  to be rated or its  rating
may be reduced below the minimum rating required for purchase by that Fund.
    
 
     In  addition  to  ratings  assigned  to  individual  bond  issues, Mitchell
Hutchins or  PIMCO,  as  applicable,  will  analyze  interest  rate  trends  and
developments  that  may affect  individual  issuers, including  factors  such as
liquidity, profitability  and  asset quality.  The  yields on  debt  securities,
including  mortgage- and asset-backed securities in  which the Funds invest, are
dependent on a variety  of factors, including  general money market  conditions,
general  conditions in the  bond market, the financial  condition of the issuer,
the size of the offering, the maturity of the obligation and its credit  rating.
There  is a  wide variation in  the quality  of bonds, both  within a particular
classification and between  classifications. An issuer's  obligations under  its
debt  securities are  subject to  the provisions  of bankruptcy,  insolvency and
other laws affecting the rights and remedies of bond holders or other  creditors
of an issuer; litigation or other conditions may also adversely affect the power
or  ability of issuers to meet their obligations for the payment of interest and
principal on their bonds.
 
     SPECIAL CHARACTERISTICS  OF MORTGAGE-  AND  ASSET-BACKED SECURITIES.    The
yield characteristics of mortgage- and asset-backed securities differ from those
of  traditional debt securities.  Among the major  differences are that interest
and principal  payments are  made  more frequently,  usually monthly,  and  that
principal  may be prepaid at  any time because the  underlying mortgage loans or
other obligations generally may be prepaid at any time. Prepayments on a pool of
mortgage loans are influenced by a  variety of economic, geographic, social  and
other  factors, including changes  in mortgagors' housing  needs, job transfers,
unemployment, mortgagors' net equity in  the mortgaged properties and  servicing
decisions.  Generally, however,  prepayments on  fixed-rate mortgage  loans will
increase during a period of falling interest rates and
 
                                       2
 

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<PAGE>
decrease during a  period of  rising interest  rates. Similar  factors apply  to
prepayments   on  asset-backed   securities,  but   the  receivables  underlying
asset-backed securities generally are  of a shorter maturity  and thus are  less
likely  to experience  substantial prepayments. Such  securities, however, often
provide that for a specified time period the issuers will replace receivables in
the pool that are repaid with comparable obligations. If the issuer is unable to
do so, repayment of principal on the asset-backed securities may commence at  an
earlier  date. Mortgage- and asset-backed securities  may decrease in value as a
result  of  increases  in  interest  rates  and  may  benefit  less  than  other
fixed-income  securities from  declining interest rates  because of  the risk of
prepayment.
 
     The rate  of  interest on  mortgage-backed  securities is  lower  than  the
interest  rates paid on the mortgages included in the underlying pool due to the
annual fees  paid to  the servicer  of  the mortgage  pool for  passing  through
monthly  payments to  certificateholders and  to any  guarantor, and  due to any
yield retained by  the issuer.  Actual yield  to the  holder may  vary from  the
coupon rate, even if adjustable, if the mortgage-backed securities are purchased
or  traded in the secondary market at  a premium or discount. In addition, there
is normally some delay  between the time the  issuer receives mortgage  payments
from   the  servicer  and  the  time  the  issuer  makes  the  payments  on  the
mortgage-backed securities, and this  delay reduces the  effective yield to  the
holder of such securities.
 
     Yields  on  pass-through  securities  are  typically  quoted  by investment
dealers and vendors based on the maturity of the underlying instruments and  the
associated  average  life assumption.  The  average life  of  pass-through pools
varies with the maturities of the  underlying mortgage loans. A pool's term  may
be  shortened by  unscheduled or early  payments of principal  on the underlying
mortgages. Because prepayment rates of individual  pools vary widely, it is  not
possible  to predict accurately  the average life  of a particular  pool. In the
past, a common industry practice has been to assume that prepayments on pools of
fixed rate 30-year  mortgages would  result in a  12-year average  life for  the
pool.  At  present, mortgage  pools, particularly  those  with loans  with other
maturities or different characteristics, are priced on an assumption of  average
life  determined for each pool. In periods of declining interest rates, the rate
of prepayment tends to increase, thereby shortening the actual average life of a
pool of mortgage-related securities. Conversely,  in periods of rising  interest
rates,  the rate of prepayment tends to decrease, thereby lengthening the actual
average life of  the pool. However,  these effects  may not be  present, or  may
differ  in degree, if the  mortgage loans in the  pools have adjustable interest
rates or  other special  payment  terms, such  as  a prepayment  charge.  Actual
prepayment  experience  may cause  the  yield of  mortgage-backed  securities to
differ from  the assumed  average life  yield. Reinvestment  of prepayments  may
occur  at  lower interest  rates than  the  original investment,  thus adversely
affecting the yield of a Fund.
 
   
     U.S. Government Income Fund, Low Duration Income Fund and Investment  Grade
Income  Fund each  may invest in  adjustable rate mortgage  ('ARM') and floating
rate mortgage-backed securities. Because the interest rates on ARM and  floating
rate  mortgage-backed securities are reset in response to changes in a specified
market index,  the  values of  such  securities tend  to  be less  sensitive  to
interest  rate  fluctuations  than the  values  of fixed-rate  securities.  As a
result, during periods of rising interest rates, ARMs generally do not  decrease
in  value  as  much as  fixed  rate  securities. Conversely,  during  periods of
declining rates, ARMs generally do not increase  in value as much as fixed  rate
securities. ARM mortgage-backed securities represent a right to receive interest
payments  at a rate that is adjusted to reflect the interest earned on a pool of
ARMs. ARMs generally provide that the borrower's mortgage interest rate may  not
be  adjusted above a specified lifetime maximum  rate or, in some cases, below a
minimum lifetime rate. In addition, certain ARMs provide for limitations on  the
maximum  amount by which  the mortgage interest  rate may adjust  for any single
adjustment period.  ARMs also  may provide  for limitations  on changes  in  the
maximum amount by which the
    
 
                                       3
 

<PAGE>
<PAGE>
borrower's  monthly payment may adjust for  any single adjustment period. In the
event that a monthly payment is not  sufficient to pay the interest accruing  on
the  ARM, any  such excess  interest is  added to  the mortgage  loan ('negative
amortization'), which is repaid through future payments. If the monthly  payment
exceeds the sum of the interest accrued at the applicable mortgage interest rate
and  the  principal  payment that  would  have  been necessary  to  amortize the
outstanding principal balance over  the remaining term of  the loan, the  excess
reduces  the principal  balance of  the ARM.  Borrowers under  ARMs experiencing
negative amortization may take longer to build up their equity in the underlying
property and may be more likely to default.
 
     The rates of interest payable on certain ARMs, and therefore on certain ARM
mortgage-backed securities, are based on indices, such as the one-year  constant
maturity  Treasury rate, that  reflect changes in  market interest rates. Others
are based on indices, such as the  11th District Federal Home Loan Bank Cost  of
Funds  index ('COFI') that tend to lag  behind changes in market interest rates.
The values of ARM mortgage-backed securities supported by ARMs that adjust based
on lagging  indices  tend  to  be  somewhat  more  sensitive  to  interest  rate
fluctuations  than those reflecting  current interest rate  levels, although the
values of such ARM mortgage-backed securities still tend to be less sensitive to
interest rate fluctuations than fixed-rate securities.
 
     Floating rate  mortgage-backed securities  are classes  of  mortgage-backed
securities  that have been structured to represent the right to receive interest
payments at rates that fluctuate in accordance with an index but that  generally
are  supported  by pools  comprised of  fixed-rate mortgage  loans. As  with ARM
mortgage-backed  securities,  interest   rate  adjustments   on  floating   rate
mortgage-backed  securities  may  be based  on  indices that  lag  behind market
interest rates.  Interest  rates  on floating  rate  mortgage-backed  securities
generally  are adjusted  monthly. Floating  rate mortgage-backed  securities are
subject to lifetime interest  rate caps, but they  generally are not subject  to
limitations  on monthly or  other periodic changes in  interest rates or monthly
payments.
 
     ARMs also may be subject  to a greater rate  of prepayments in a  declining
interest  rate environment. For  example, during a  period of declining interest
rates, prepayments  on ARMs  could increase  because the  availability of  fixed
mortgage  loans  at  competitive  interest  rates  may  encourage  mortgagors to
'lock-in' at  a lower  interest  rate. Conversely,  during  a period  of  rising
interest rates, prepayments on ARMs might decrease. The rate of prepayments with
respect to ARMs has fluctuated in recent years.
 
   
     CONVERTIBLE SECURITIES.  A convertible security is a bond, debenture, note,
preferred  stock or other security that may be converted into or exchanged for a
prescribed amount of common  stock of the  same or a  different issuer within  a
particular  period  of  time at  a  specified  price or  formula.  A convertible
security entitles the holder to receive interest paid or accrued on debt or  the
dividend  paid on preferred  stock until the convertible  security matures or is
redeemed, converted or exchanged. Before conversion, convertible securities have
characteristics  similar  to  nonconvertible   debt  securities  in  that   they
ordinarily  provide a stable stream of  income with generally higher yields than
those of common stocks  of the same or  similar issuers. Convertible  securities
rank senior to common stock in a corporation's capital structure but are usually
subordinate  to  comparable  nonconvertible  securities.  While  no  securities'
investment is without some risk, investment in convertible securities  generally
entail  less risk than the  issuer's common stock, although  the extent to which
such risk is  reduced depends  in large  measure upon  the degree  to which  the
convertible  security  sells  above  its  value  as  a  fixed  income  security.
Convertible securities  have  unique  investment characteristics  in  that  they
generally  (1)  have higher  yields than  common stocks,  but lower  yields than
comparable nonconvertible securities,  (2) are  less subject  to fluctuation  in
value than the underlying stock
    
 
                                       4
 

<PAGE>
<PAGE>
   
since  they have fixed income characteristics  and (3) provide the potential for
capital appreciation  if  the  market  price  of  the  underlying  common  stock
increases.
    
 
   
     The value of a convertible security is a function of its 'investment value'
(determined  by its yield in  comparison with the yields  of other securities of
comparable maturity and quality that do not have a conversion privilege) and its
'conversion value' (the security's worth, at market value, if converted into the
underlying common  stock). The  investment value  of a  convertible security  is
influenced  by changes  in interest  rates, with  investment value  declining as
interest rates increase  and increasing  as interest rates  decline. The  credit
standing  of  the  issuer and  other  factors also  may  have an  effect  on the
convertible security's investment value. The  conversion value of a  convertible
security  is determined by the  market price of the  underlying common stock. If
the conversion value is low relative to  the investment value, the price of  the
convertible  security  is  governed  principally  by  its  investment  value and
generally the conversion value decreases as the convertible security  approaches
maturity.  To  the  extent  the  market price  of  the  underlying  common stock
approaches or  exceeds  the  conversion  price, the  price  of  the  convertible
security will be increasingly influenced by its conversion value. In addition, a
convertible  security generally will sell at a premium over its conversion value
by the  extent to  which  investors place  value on  the  right to  acquire  the
underlying common stock while holding a fixed income security.
    
 
   
     Investment  Grade Income  Fund has no  current intention  of converting any
convertible securities it  may own into  equity or holding  them as equity  upon
conversion, although it may do so for temporary purposes. A convertible security
may  be subject to redemption at the option of the issuer at a price established
in the convertible  security's governing instrument.  If a convertible  security
held  by the Fund is called for redemption,  the Fund will be required to permit
the issuer to redeem the security,  convert it into the underlying common  stock
or sell it to a third party.
    
 
   
     ILLIQUID SECURITIES.  Each Fund may invest up to 10% of its net assets (15%
for  Low  Duration  Income  Fund) in  illiquid  securities.  The  term 'illiquid
securities' for this purpose means securities that cannot be disposed of  within
seven  days in the  ordinary course of  business at approximately  the amount at
which a  Fund  has valued  the  securities  and includes,  among  other  things,
purchased  over-the-counter ('OTC')  options, repurchase  agreements maturing in
more than  seven  days  and  restricted securities  other  than  those  Mitchell
Hutchins  or PIMCO has determined are  liquid pursuant to guidelines established
by the Trust's  board of  trustees. The  assets used  as cover  for OTC  options
written by a Fund will be considered illiquid unless the OTC options are sold to
qualified  dealers who  agree that  the Fund  may repurchase  any OTC  option it
writes at a maximum price to be calculated by a formula set forth in the  option
agreement.  The cover for an OTC option  written subject to this procedure would
be considered illiquid  only to  the extent  that the  maximum repurchase  price
under the formula exceeds the intrinsic value of the option. Illiquid restricted
securities  may be sold  only in privately negotiated  transactions or in public
offerings with respect to which a registration statement is in effect under  the
Securities  Act of 1933 ('1933 Act'). Where registration is required, a Fund may
be obligated to pay all or part of the registration expenses and a  considerable
period may elapse between the time of the decision to sell and the time the Fund
may  be permitted to sell a  security under an effective registration statement.
If, during such a  period, adverse market conditions  were to develop, the  Fund
might obtain a less favorable price than prevailed when it decided to sell.
    
 
     Not  all  restricted  securities  are illiquid.  In  recent  years  a large
institutional  market  has  developed  for  certain  securities  that  are   not
registered   under  the  1933  Act,  including  private  placements,  repurchase
agreements, commercial paper, foreign securities and corporate bonds and  notes.
These  instruments are  often restricted  securities because  the securities are
sold in transactions not requiring registration.
 
                                       5
 

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Institutional investors generally will not seek to sell these instruments to the
general  public,  but  instead  will   often  depend  either  on  an   efficient
institutional market in which such unregistered securities can be readily resold
or  on an issuer's ability to honor  a demand for repayment. Therefore, the fact
that there are contractual or legal restrictions on resale to the general public
or certain institutions is not dispositive of the liquidity of such investments.
 
     Rule 144A  under  the  1933  Act  establishes  a  'safe  harbor'  from  the
registration  requirements of the 1933 Act  for resales of certain securities to
qualified institutional buyers. Institutional markets for restricted  securities
have  developed as a  result of Rule 144A,  providing both readily ascertainable
values for restricted securities and the  ability to liquidate an investment  to
satisfy  share redemption orders. Such markets include automated systems for the
trading, clearance and  settlement of  unregistered securities  of domestic  and
foreign issuers, such as the PORTAL System sponsored by the National Association
of  Securities Dealers, Inc.  An insufficient number  of qualified institutional
buyers interested in purchasing Rule 144A-eligible restricted securities held by
a Fund,  however, could  affect adversely  the marketability  of such  portfolio
securities,  and the Fund might be unable to dispose of such securities promptly
or at reasonable prices.
 
     The Trust's  board  of  trustees  has  delegated  the  function  of  making
day-to-day  determinations of liquidity to  Mitchell Hutchins or PIMCO, pursuant
to guidelines  approved by  the board.  Mitchell Hutchins  and PIMCO  take  into
account  a number of factors in  reaching liquidity decisions, including but not
limited to (1)  the frequency  of trades  for the  security, (2)  the number  of
dealers  that make quotes for the security,  (3) the number of dealers that have
undertaken to make a market in the  security, (4) the number of other  potential
purchasers and (5) the nature of the security and how trading is effected (e.g.,
the time needed to sell the security, how offers are solicited and the mechanics
of  transfer). Mitchell Hutchins  or PIMCO monitors  the liquidity of restricted
securities in the Fund's portfolio and reports periodically on such decisions to
the board of trustees.
 
     REPURCHASE AGREEMENTS.  Repurchase agreements  are transactions in which  a
Fund  purchases  securities  from a  bank  or recognized  securities  dealer and
simultaneously commits to  resell the  securities to the  bank or  dealer at  an
agreed-upon date and price reflecting a market rate of interest unrelated to the
coupon rate or maturity of the purchased securities. A Fund maintains custody of
the underlying securities prior to their repurchase; thus, the obligation of the
bank  or dealer to pay the repurchase price on the date agreed to is, in effect,
secured by such securities. If  the value of these  securities is less than  the
repurchase price, plus any agreed-upon additional amount, the other party to the
agreement must provide additional collateral so that at all times the collateral
is  at  least equal  to the  repurchase price,  plus any  agreed-upon additional
amount. The difference between the total  amount to be received upon  repurchase
of  the securities and the price that was  paid by a Fund upon their acquisition
is accrued as interest and included in the Fund's net investment income.
 
     Repurchase agreements  carry  certain  risks  not  associated  with  direct
investments  in securities, including  possible declines in  the market value of
the underlying securities and delays and costs to a Fund if the other party to a
repurchase  agreement  becomes  insolvent.  Each  Fund  intends  to  enter  into
repurchase  agreements only with  banks and dealers  in transactions believed by
Mitchell Hutchins or PIMCO  to present minimum credit  risks in accordance  with
guidelines  established by the  Trust's board of  trustees. Mitchell Hutchins or
PIMCO reviews and monitors the creditworthiness of those institutions under  the
board's general supervision.
 
   
     REVERSE REPURCHASE AGREEMENTS.  As stated in the Prospectus, each Fund each
may  enter into reverse repurchase agreements with banks and securities dealers.
Such agreements involve the sale of
    
 
                                       6
 

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<PAGE>
   
securities held by the  Fund subject to the  Fund's agreement to repurchase  the
securities  at  an  agreed-upon  date  and price  reflecting  a  market  rate of
interest. Such agreements  are considered to  be borrowings and  may be  entered
into  only  for  temporary or  emergency  purposes. While  a  reverse repurchase
agreement is  outstanding, a  Fund's custodian  segregates assets  to cover  the
amount  of the  Fund's obligations under  the reverse  repurchase agreement. See
'Investment Policies and Restrictions -- Segregated Accounts.'
    
 
     WHEN-ISSUED AND DELAYED DELIVERY SECURITIES.  As stated in the  Prospectus,
each  Fund may purchase securities on a 'when-issued' or delayed delivery basis.
A security purchased on a when-issued  or delayed delivery basis is recorded  as
an  asset  on the  commitment date  and is  subject to  changes in  market value
generally based upon changes in the  level of interest rates. Thus,  fluctuation
in  the value of the security from the time of the commitment date will affect a
Fund's net  asset  value.  When  a  Fund agrees  to  purchase  securities  on  a
when-issued  basis, its custodian  segregates assets to cover  the amount of the
commitment. See 'Investment Policies  and Restrictions -- Segregated  Accounts.'
The  Funds purchase  when-issued securities  only with  the intention  of taking
delivery, but may sell the  right to acquire the  security prior to delivery  if
Mitchell  Hutchins or PIMCO deems it advantageous  to do so, which may result in
capital gain or loss to a Fund.
 
   
     FOREIGN SECURITIES.  Investment Grade Income  Fund may invest up to 20%  of
its  net  assets in  U.S. dollar-denominated  securities  of foreign  issuers or
foreign branches of U.S. banks that  are traded in the U.S. securities  markets,
or  in U.S. dollar-denominated  securities the value  of which is  linked to the
value of foreign currencies. High  Income Fund may invest up  to 35% of its  net
assets in securities of foreign issuers, with no more than 10% of its net assets
in  securities of foreign issuers that  are denominated and traded in currencies
other than  the U.S.  dollar. An  investment in  these Funds  may involve  risks
relating  to political, social and economic developments abroad as well as risks
resulting from the differences between the regulations to which U.S. and foreign
issuers and markets are subject. These risks include expropriation, confiscatory
taxation, withholding  taxes,  political  or social  instability  or  diplomatic
developments.  Moreover, individual  foreign economies  may differ  favorably or
unfavorably from the U.S. economy in  such respects as growth of gross  national
product,  rate of inflation, capital reinvestment, resource self-sufficiency and
balance of  payments positions.  To the  extent these  Funds invest  in  foreign
securities,  the  securities  may  not be  registered  with  the  Securities and
Exchange Commission ('SEC'), nor  the issuers thereof  subject to its  reporting
requirements.  Accordingly,  there may  be  less publicly  available information
concerning foreign issuers of securities held  by these Funds than is  available
concerning  U.S.  companies.  Foreign  companies are  not  generally  subject to
uniform accounting,  auditing  and financial  reporting  standards or  to  other
regulatory  requirements  comparable  to  those  applicable  to  U.S. companies.
Securities of many foreign  companies may be less  liquid and their prices  more
volatile  than those of securities of comparable U.S. companies. Transactions in
foreign securities may be subject to less efficient settlement practices.  Legal
remedies  for defaults and  disputes may have  to be pursued  in foreign courts,
whose procedures  differ  substantially  from  those  of  U.S.  courts.  Foreign
securities  trading practices,  including those  involving securities settlement
where High Income Fund assets may be  released prior to receipt of payment,  may
expose  that  Fund to  increased risk  in the  event  of a  failed trade  or the
insolvency of a foreign broker-dealer.
    
 
   
     If the  value of  foreign currency  rises  against the  value of  the  U.S.
dollar,  the value of Fund assets denominated in that currency or linked to that
currency will  increase; correspondingly,  if the  value of  a foreign  currency
declines  against  the  value of  the  U.S.  dollar, the  value  of  Fund assets
denominated in  that currency  or linked  to that  currency will  decrease.  The
exchange  rates between the  U.S. dollar and other  currencies are determined by
supply and demand in  the currency exchange  markets, international balances  of
payments,   governmental  intervention,  speculation   and  other  economic  and
political conditions.
    
 
                                       7
 

<PAGE>
<PAGE>
   
     The costs  attributable to  foreign  investing borne  by High  Income  Fund
frequently  are  higher  than  those  attributable  to  domestic  investing. For
example, the cost of maintaining custody of foreign securities exceeds custodian
costs for domestic securities, and  transaction and settlement costs of  foreign
investing  also  frequently  are  higher  than  those  attributable  to domestic
investing. Costs associated with  the exchange of  currencies also make  foreign
investing  more expensive than domestic  investing. Investment income on certain
foreign securities  in which  the Fund  may  invest may  be subject  to  foreign
withholding  or other  government taxes  that could  reduce the  return of these
securities. Tax  treaties  between  the United  States  and  foreign  countries,
however,  may reduce or  eliminate the amount  of foreign tax  to which the Fund
would be subject.
    
 
     LENDING OF PORTFOLIO SECURITIES.  As indicated in the Prospectus, each Fund
is authorized  to lend  up  to 33  1/3%  of the  total  value of  its  portfolio
securities  to broker-dealers or institutional  investors that Mitchell Hutchins
deems qualified, but only when the borrower maintains acceptable collateral with
the Fund's custodian, marked to market daily, in an amount at least equal to the
market value  of the  securities loaned,  plus accrued  interest and  dividends.
Acceptable  collateral  is  limited  to  cash,  U.S.  government  securities and
irrevocable letters  of  credit  that meet  certain  guidelines  established  by
Mitchell  Hutchins. In  determining whether to  lend securities  to a particular
broker-dealer or institutional  investor, Mitchell Hutchins  will consider,  and
during   the  period  of   the  loan  will  monitor,   all  relevant  facts  and
circumstances, including  the  creditworthiness of  the  borrower. A  Fund  will
retain  authority to terminate any  loan at any time.  A Fund may pay reasonable
administrative and  custodial fees  in connection  with  a loan  and may  pay  a
negotiated  portion  of  the  interest  earned  on  the  cash  or  money  market
instruments held as collateral  to the borrower or  placing broker. A Fund  will
receive  reasonable interest  on the loan  or a  flat fee from  the borrower and
amounts equivalent  to any  dividends, interest  or other  distributions on  the
securities  loaned. A Fund will regain  record ownership of loaned securities to
exercise beneficial rights, such as voting and subscription rights and rights to
dividends, interest  or  other  distributions, when  regaining  such  rights  is
considered to be in the Fund's interest.
 
   
     LOAN PARTICIPATIONS AND ASSIGNMENTS.  Investment Grade Income Fund and High
Income  Fund each may invest up to 5%  of its net assets in secured or unsecured
fixed or floating  rate loans  ('Loans') arranged  through private  negotiations
between   a  borrowing  corporation  and  one  or  more  financial  institutions
('Lenders'). The Fund's investments in Loans  are expected in most instances  to
be  in the  form of participations  ('Participations') in  Loans and assignments
('Assignments') of all or a portion of Loans from third parties.  Participations
typically  result in a  Fund's having a contractural  relationship only with the
Lender, not with  the borrower.  A Fund  has the  right to  receive payments  of
principal,  interest and any fees  to which it is  entitled only from the Lender
selling the Participation and  only upon receipt by  the Lender of the  payments
from  the  borrower.  In  connection  with  purchasing  Participations,  a  Fund
generally has no  direct right to  enforce compliance by  the borrower with  the
terms  of the  loan agreement relating  to the  Loan, nor any  rights of set-off
against the borrower, and the fund may not directly benefit from any  collateral
supporting  the Loan in which it has purchased the Participation. As a result, a
Fund assumes the credit risk of both the borrower and the Lender that is selling
the Participation.  In the  event of  the  insolvency of  the Lender  selling  a
Participation, a Fund may be treated as a general creditor of the Lender and may
not benefit from any set-off between the Lender and the borrower. The Funds will
acquire  Participations only if the Lender  interpositioned between the Fund and
the borrower is determined by Mitchell Hutchins to be creditworthy.
    
 
   
     When a Fund purchases Assignments  from Lenders, it acquires direct  rights
against  the borrower  on the  Loan. However,  because Assignments  are arranged
through private negotiations between potential assignees
    
 
                                       8
 

<PAGE>
<PAGE>
   
and assignors, the rights and obligations acquired by a Fund as the purchaser of
an Assignment may  differ from,  and be  more limited  than, those  held by  the
assigning Lender.
    
 
   
     Assignments  and Participations are generally not registered under the 1933
Act and thus  are subject to  each Fund's limitation  on investment in  illiquid
securities.  Because there  is no liquid  market for such  securities, the Funds
anticipate that  such securities  could be  sold  only to  a limited  number  of
institutional  investors. The  lack of  a liquid  secondary market  will have an
adverse impact  on the  value of  such securities  and on  a Fund's  ability  to
dispose  of particular Assignments or Participations  when necessary to meet the
Fund's liquidity needs  or in  response to a  specific economic  event, such  as
deterioration in the creditworthiness of the borrower.
    
 
     SEGREGATED  ACCOUNTS.   When a Fund  enters into  certain transactions that
involve obligations to make future  payments to third parties, including  dollar
rolls,  reverse  repurchase  agreements  or  the  purchase  of  securities  on a
when-issued or delayed delivery basis, the  Fund will maintain with an  approved
custodian  in a  segregated account  cash, U.S.  government securities  or other
liquid high-grade debt securities, marked to market daily, in an amount at least
equal to  the  Fund's  obligation  or commitment  under  such  transactions.  As
described  below  under  'Hedging  and  Related  Income  Strategies,' segregated
accounts may also be required in connection with certain transactions  involving
options or futures contracts or interest rate protection transactions.
 
   
     INVESTMENT LIMITATIONS.  Each Fund will not:
    
 
   
          (1)  purchase securities of any one issuer  if, as a result, more than
     5% of  the Fund's  total assets  would be  invested in  securities of  that
     issuer  or the  Fund would  own or  hold more  than 10%  of the outstanding
     voting securities of that issuer, except that up to 25% of the Fund's total
     assets may be invested without regard  to this limitation, and except  that
     this  limitation does not  apply to securities issued  or guaranteed by the
     U.S. government, its agencies and instrumentalities or to securities issued
     by other investment companies.
    
 
     The following  interpretation  applies to,  but  is  not a  part  of,  this
fundamental  restriction:  Mortgage-  and asset-backed  securities  will  not be
considered to have been issued  by the same issuer  by reason of the  securities
having  the same sponsor, and mortgage-  and asset-backed securities issued by a
finance or  other special  purpose subsidiary  that are  not guaranteed  by  the
parent  company will be  considered to be  issued by a  separate issuer from the
parent company.
 
   
          (2) purchase any  security if, as  a result of  that purchase, 25%  or
     more  of the Fund's total assets would be invested in securities of issuers
     having their principal  business activities  in the  same industry,  except
     that  this limitation does not apply  to securities issued or guaranteed by
     the U.S.  government, its  agencies or  instrumentalities or  to  municipal
     securities,  and except that  U.S. Government Income  Fund and Low Duration
     Income Fund, under normal  circumstances, each will invest  25% or more  of
     its  total assets in mortgage-  and asset-backed securities, which (whether
     or not issued  or guaranteed by  an agency or  instrumentality of the  U.S.
     government)  shall be  considered a  single industry  for purposes  of this
     limitation.
    
 
          (3) issue senior securities or borrow money, except as permitted under
     the Investment Company Act of 1940 ('1940  Act') and then not in excess  of
     33  1/3% of  the Fund's  total assets (including  the amount  of the senior
     securities issued but  reduced by any  liabilities not constituting  senior
     securities)  at the time of the issuance or borrowing, except that the Fund
     may borrow up to an  additional 5% of its  total assets (not including  the
     amount borrowed) for temporary or emergency purposes.
 
                                       9
 

<PAGE>
<PAGE>
          (4)  make  loans,  except  through loans  of  portfolio  securities or
     through  repurchase  agreements,  provided   that  for  purposes  of   this
     restriction, the acquisition of bonds, debentures, other debt securities or
     instruments,  or participations or other  interests therein and investments
     in government  obligations,  commercial  paper,  certificates  of  deposit,
     bankers'  acceptances  or similar  instruments will  not be  considered the
     making of a loan.
 
          (5) engage  in  the  business  of  underwriting  securities  of  other
     issuers,  except  to  the  extent  that the  Fund  might  be  considered an
     underwriter under  the  federal  securities laws  in  connection  with  its
     disposition of portfolio securities.
 
          (6)   purchase  or  sell  real  estate,  except  that  investments  in
     securities of  issuers  that  invest  in real  estate  and  investments  in
     mortgage-backed  securities, mortgage  participations or  other instruments
     supported by interests in real estate  are not subject to this  limitation,
     and  except that the Fund may  exercise rights under agreements relating to
     such securities, including the right  to enforce security interests and  to
     hold  real estate  acquired by reason  of such enforcement  until that real
     estate can be liquidated in an orderly manner.
 
          (7) purchase or sell physical commodities unless acquired as a  result
     of  owning securities or other instruments, but the Fund may purchase, sell
     or enter  into financial  options and  futures, forward  and spot  currency
     contracts,  swap transactions  and other financial  contracts or derivative
     instruments.
 
   
     The foregoing fundamental  investment limitations cannot  be changed for  a
Fund  without the  affirmative vote of  the lesser of  (1) more than  50% of the
outstanding shares of  the Fund or  (2) 67% or  more of the  shares of the  Fund
present  at a shareholders' meeting  if more than 50%  of the outstanding shares
are represented  at  the  meeting  in  person  or  by  proxy.  If  a  percentage
restriction  is adhered to  at the time  of an investment  or transaction, later
changes in percentage resulting from a change in values of portfolio  securities
or  the amount of total assets will not  be considered a violation of any of the
Funds' investment limitations, restrictions or investment policies.
    
 
     The following investment restrictions of each Fund are not fundamental  and
may be changed by the Trust's board of trustees without shareholder approval.
 
     Each Fund will not:
   
    
 
   
          (1)  purchase or retain  the securities of any  issuer if the officers
     and trustees  of the  Trust  and the  officers  and directors  of  Mitchell
     Hutchins   (and,  for  Low  Duration   Income  Fund,  PIMCO)  (each  owning
     beneficially as  principal  for its  own  account  more than  0.5%  of  the
     outstanding  securities of the issuer) beneficially so own in the aggregate
     more than 5% of the securities of the issuer.
    
 
   
          (2) purchase any security (for Low Duration Income Fund, any  security
     other  than mortgage- and asset-backed securities) if as a result more than
     5% of the value  of the Fund's  assets would be  invested in securities  of
     companies  that, together  with any  predecessors, have  been in continuous
     operation for less then three years.
    
 
   
          (3) invest more than  10% (for Low Duration  Income Fund, 15%) of  its
     net assets in illiquid securities, a term that means securities that cannot
     be  disposed of  within seven  days in the  ordinary course  of business at
     approximately the amount at  which the Fund has  valued the securities  and
     includes,  among other things, repurchase  agreements maturing in more than
     seven days.
    
 
   
          (4) make investments in  warrants if such  investments, valued at  the
     lower  of cost or market,  exceed 5% of the value  of its net assets, which
     amount  may  include  warrants  that  are  not  listed  on  the  New   York
    
 
                                       10
 

<PAGE>
<PAGE>
   
     Stock  Exchange,  Inc.  ('NYSE')  or  the  American  Stock  Exchange, Inc.,
     provided that  such unlisted  warrants,  valued at  the  lower of  cost  or
     market,  do not exceed  2% of the  Fund's net assets,  and further provided
     that this restriction does not apply to  warrants attached to or sold as  a
     unit with other securities.
    
 
   
          (5) invest in real estate limited partnerships.
    
 
   
          (6)  change its investment policies to  permit the Fund to invest more
     than 35%  of its  total assets  in debt  securities rated  Ba or  lower  by
     Moody's  or  BB or  lower  by S&P,  comparably  rated by  another  NRSRO or
     determined by  Mitchell  Hutchins or  PIMCO  to be  of  comparable  quality
     without  giving at  least 30 days'  advance notice  to shareholders, except
     that this restriction does not apply to High Income Fund.
    
 
   
          (7) purchase  securities  on  margin,  except  for  short-term  credit
     necessary  for clearance of portfolio transactions and except that the Fund
     may make margin deposits  in connection with its  use of financial  options
     and  futures, forward  and spot  currency contracts,  swap transactions and
     other financial contracts or derivative instruments.
    
 
   
          (8) engage in short sales of securities or maintain a short  position,
     except  that the Fund may (a) sell short 'against the box' and (b) maintain
     short positions  in  connection  with  its use  of  financial  options  and
     futures,  forward and spot currency  contracts, swap transactions and other
     financial contracts or derivative instruments.
    
 
   
          (9) invest in oil, gas or mineral exploration or development  programs
     or  leases, except that investments in securities of issuers that invest in
     such  programs  or  leases  and  investments  in  asset-backed   securities
     supported  by receivables  generated from such  programs or  leases are not
     subject to this prohibition.
    
 
   
          (10) purchase securities of other investment companies, except to  the
     extent  permitted by the 1940 Act and  except that this limitation does not
     apply to securities received  or acquired as  dividends, through offers  of
     exchange, or as a result of reorganization, consolidation, or merger.
    
 
                     HEDGING AND RELATED INCOME STRATEGIES
 
   
     GENERAL DESCRIPTION OF HEDGING STRATEGIES.  As discussed in the Prospectus,
Mitchell  Hutchins or PIMCO may use a variety of financial instruments ('Hedging
Instruments'), including certain options, futures contracts (sometimes  referred
to  as 'futures') and options on futures contracts, to attempt to hedge a Fund's
portfolio and to enhance income. Mitchell Hutchins or PIMCO also may attempt  to
hedge   a  Fund's  portfolio  through  the   use  of  interest  rate  protection
transactions. The particular Hedging Instruments are described in Appendix C  to
the Prospectus.
    
 
     Hedging  strategies can be broadly categorized  as 'short hedges' and 'long
hedges.' A short hedge is  a purchase or sale  of a Hedging Instrument  intended
partially  or fully  to offset potential  declines in  the value of  one or more
investments held in a Fund's  portfolio. Thus, in a short  hedge a Fund takes  a
position in a Hedging Instrument whose price is expected to move in the opposite
direction of the price of the investment being hedged. For example, a Fund might
purchase  a put option on a security to hedge against a potential decline in the
value of that security. If the price of the security declined below the exercise
price of the put, the Fund could exercise the put and thus limit its loss  below
the  exercise  price  to  the  premium  paid  plus  transaction  costs.  In  the
alternative, because the value of the put option can be expected to increase  as
the
 
                                       11
 

<PAGE>
<PAGE>
value  of the underlying security declines, the  Fund might be able to close out
the put option  and realize a  gain to offset  the decline in  the value of  the
security.
 
     Conversely,  a long  hedge is  a purchase or  sale of  a Hedging Instrument
intended partially or  fully to  offset potential increases  in the  acquisition
cost  of one or more investments that a Fund intends to acquire. Thus, in a long
hedge a Fund takes a position in a Hedging Instrument whose price is expected to
move in the  same direction  as the price  of the  prospective investment  being
hedged.  For  example, a  Fund might  purchase a  call option  on a  security it
intends to purchase in  order to hedge  against an increase in  the cost of  the
security. If the price of the security increased above the exercise price of the
call,  the Fund could exercise  the call and thus  limit its acquisition cost to
the exercise price plus the  premium paid and transaction costs.  Alternatively,
the  Fund  might  be  able  to  offset the  price  increase  by  closing  out an
appreciated call option and realizing a gain.
 
     Each Fund may purchase and write (sell) covered straddles on securities  or
indices of debt securities. A long straddle is a combination of a call and a put
option purchased on the same security or on the same futures contract, where the
exercise  price of the  put is less than  or equal to the  exercise price of the
call. A Fund might enter  into a long straddle  when Mitchell Hutchins or  PIMCO
believes  it likely that interest rates will be more volatile during the term of
the option than the option pricing implies. A short straddle is a combination of
a call and a put  written on the same security  where the exercise price of  the
put  is less than or equal to the exercise price of the call. A Fund might enter
into a short straddle when Mitchell Hutchins or PIMCO believes it unlikely  that
interest  rates will be as volatile during the  term of the option as the option
pricing implies.
 
     Hedging Instruments on securities generally are used to hedge against price
movements in one  or more particular  securities positions that  a Fund owns  or
intends  to acquire. Hedging Instruments on debt securities may be used to hedge
either individual securities or broad fixed income market sectors.
 
     The use of Hedging Instruments is subject to applicable regulations of  the
Securities  and  Exchange Commission  ('SEC'), the  several options  and futures
exchanges upon which they are  traded, the Commodity Futures Trading  Commission
('CFTC') and various state regulatory authorities. In addition, a Fund's ability
to use Hedging Instruments will be limited by tax considerations. See 'Taxes.'
 
     In  addition to the  products, strategies and risks  described below and in
the Prospectus,  Mitchell  Hutchins  and PIMCO  expect  to  discover  additional
opportunities  in connection with  options, futures contracts  and other hedging
techniques. These new  opportunities may become  available as Mitchell  Hutchins
and PIMCO develop new techniques, as regulatory authorities broaden the range of
permitted transactions and as new options, futures contracts or other techniques
are developed. Mitchell Hutchins or PIMCO may utilize these opportunities to the
extent that they are consistent with a Fund's investment objective and permitted
by  the Fund's investment limitations and applicable regulatory authorities. The
Funds' Prospectus or Statement of Additional Information will be supplemented to
the extent that new  products or techniques  involve materially different  risks
than those described below or in the Prospectus.
 
     SPECIAL  RISKS  OF  HEDGING STRATEGIES.    The use  of  Hedging Instruments
involves special considerations and risks, as described below. Risks  pertaining
to particular Hedging Instruments are described in the sections that follow.
 
          (1)  Successful use of most  Hedging Instruments depends upon Mitchell
     Hutchins' or PIMCO's ability to predict movements of the overall securities
     markets, which requires  different skills  than predicting  changes in  the
     prices  of  individual securities.  While Mitchell  Hutchins and  PIMCO are
 
                                       12
 

<PAGE>
<PAGE>
     experienced in the use  of Hedging Instruments, there  can be no  assurance
     that any particular hedging strategy adopted will succeed.
 
          (2)  There  might be  imperfect correlation,  or even  no correlation,
     between price movements of a Hedging Instrument and price movements of  the
     investments being hedged. For example, if the value of a Hedging Instrument
     used  in a short hedge  increased by less than the  decline in value of the
     hedged investment, the hedge would not be fully successful. Such a lack  of
     correlation  might  occur due  to  factors unrelated  to  the value  of the
     investments being hedged,  such as  speculative or other  pressures on  the
     markets in which Hedging Instruments are traded.
 
          (3)  Hedging strategies,  if successful,  can reduce  risk of  loss by
     wholly or partially  offsetting the  negative effect  of unfavorable  price
     movements  in the investments being hedged. However, hedging strategies can
     also reduce  opportunity for  gain  by offsetting  the positive  effect  of
     favorable price movements in the hedged investments. For example, if a Fund
     entered  into a short hedge because  Mitchell Hutchins or PIMCO projected a
     decline in the price of a security  in the Fund's portfolio, and the  price
     of  that security increased  instead, the gain from  that increase might be
     wholly or  partially  offset by  a  decline in  the  price of  the  Hedging
     Instrument.  Moreover, if the  price of the  Hedging Instrument declined by
     more than the increase in the price of the security, the Fund could  suffer
     a  loss. In either such case, the Fund would have been in a better position
     had it not hedged at all.
 
          (4) As described below, a Fund might be required to maintain assets as
     'cover,' maintain segregated accounts or make margin payments when it takes
     positions in  Hedging Instruments  involving obligations  to third  parties
     (i.e.,  Hedging Instruments other  than purchased options).  If a Fund were
     unable to close out its positions in such Hedging Instruments, it might  be
     required  to  continue to  maintain such  assets or  accounts or  make such
     payments until the  position expired or  matured. These requirements  might
     impair  a Fund's ability to sell a portfolio security or make an investment
     at a time when it  would otherwise be favorable to  do so, or require  that
     the  Fund sell  a portfolio  security at  a disadvantageous  time. A Fund's
     ability to close out a position in a Hedging Instrument prior to expiration
     or maturity depends on  the existence of a  liquid secondary market or,  in
     the absence of such a market, the ability and willingness of a contra party
     to  enter into a transaction closing  out the position. Therefore, there is
     no assurance that  any hedging position  can be  closed out at  a time  and
     price that is favorable to a Fund.
 
     COVER  FOR  HEDGING STRATEGIES.    Transactions using  Hedging Instruments,
other than purchased options, expose a Fund to an obligation to another party. A
Fund will not  enter into any  such transactions  unless it owns  either (1)  an
offsetting  ('covered')  position  in  securities or  other  options  or futures
contracts or (2) cash, receivables and short-term liquid debt securities, with a
value sufficient at all times to  cover its potential obligations to the  extent
not  covered as provided in (1) above. Each Fund will comply with SEC guidelines
regarding cover for hedging transactions and will, if the guidelines so require,
set aside  cash, U.S.  government securities  or other  liquid, high-grade  debt
securities in a segregated account with its custodian in the prescribed amount.
 
     Assets  used as cover or held in  a segregated account cannot be sold while
the position in the  corresponding Hedging Instrument is  open, unless they  are
replaced  with similar assets. As a result, the commitment of a large portion of
a  Fund's  assets  to  cover  or  segregated  accounts  could  impede  portfolio
management  or the Fund's  ability to meet redemption  requests or other current
obligations.
 
   
     OPTIONS.  Each  Fund may purchase  put and call  options, and write  (sell)
covered  put and  call options,  on debt securities  and, for  High Income Fund,
foreign   currencies,   in   which   it    is   authorized   to   invest.    The
    
 
                                       13
 

<PAGE>
<PAGE>
purchase of call options serves as a long hedge, and the purchase of put options
serves as a short hedge. Writing covered put or call options can enable the Fund
to  enhance income  by reason  of the  premiums paid  by the  purchasers of such
options. In addition, writing covered put options serves as a limited long hedge
because increases in the value of the  hedged investment would be offset to  the
extent  of the premium received  for writing the option.  However, if the market
price of the security underlying a covered put option declines to less than  the
exercise  price of the option, minus the premium received, the Fund would expect
to suffer a loss. Writing covered call options serves as a limited short  hedge,
because  declines in the value  of the hedged investment  would be offset to the
extent of the premium received for writing the option. However, if the  security
appreciates to a price higher than the exercise price of the call option, it can
be  expected that the option will be exercised and the Fund will be obligated to
sell the security at less than its market value. The securities or other  assets
used  as cover for OTC options written by a Fund would be considered illiquid to
the extent described  under 'Investment  Policies and  Restrictions --  Illiquid
Securities.'
 
     The  value  of an  option position  will reflect,  among other  things, the
current market  value of  the underlying  investment, the  time remaining  until
expiration,  the relationship of the  exercise price to the  market price of the
underlying  investment,  the  historical  price  volatility  of  the  underlying
investment and general market conditions. Options normally have expiration dates
of   up  to  nine  months.  Generally,   OTC  options  on  debt  securities  are
European-style  options.  This  means  that  the  option  is  only   exercisable
immediately  prior  to its  expiration. This  is  in contrast  to American-style
options, which are exercisable at any time  prior to the expiration date of  the
option. Options that expire unexercised have no value.
 
     A Fund may effectively terminate its right or obligation under an option by
entering  into  a closing  transaction. For  example, a  Fund may  terminate its
obligation under a call  option that it had  written by purchasing an  identical
call option; this is known as a closing purchase transaction. Conversely, a Fund
may  terminate a position in a put or call option it had purchased by writing an
identical put  or call  option; this  is known  as a  closing sale  transaction.
Closing  transactions permit  a Fund  to realize profits  or limit  losses on an
option position prior to its exercise or expiration.
 
   
     The Funds  may purchase  or  write both  exchange-traded and  OTC  options.
Exchange  markets for options  on debt securities exist  but are relatively new,
and these instruments are  primarily traded on  the OTC market.  Exchange-traded
options  in the United  States are issued by  a clearing organization affiliated
with the exchange  on which the  option is listed  which, in effect,  guarantees
completion of every exchange-traded option transaction. In contrast, OTC options
are  contracts between a Fund and its  contra party (usually a securities dealer
or a bank) with no clearing organization guarantee. Thus, when a Fund  purchases
or  writes an OTC option, it relies on the contra party to make or take delivery
of the underlying investment upon exercise of the option. Failure by the  contra
party  to do so would result in the loss of any premium paid by the Fund as well
as the loss of any expected benefit  of the transaction. A Fund will enter  into
OTC  option transactions only  with contra parties  that have a  net worth of at
least $20 million.
    
 
     A Fund's ability to  establish and close  out positions in  exchange-listed
options  depends  on the  existence of  a  liquid market.  Each Fund  intends to
purchase or write only those exchange-traded options for which there appears  to
be  a liquid secondary  market. However, there  can be no  assurance that such a
market will exist at any particular  time. Closing transactions can be made  for
OTC  options  only  by negotiating  directly  with  the contra  party,  or  by a
transaction in the secondary market if  any such market exists. Although a  Fund
will  enter into OTC  options only with  contra parties that  are expected to be
capable of  entering  into closing  transactions  with  the Fund,  there  is  no
assurance   that  the  Fund  will   in  fact  be  able   to  close  out  an  OTC
 
                                       14
 

<PAGE>
<PAGE>
option position  at a  favorable price  prior  to expiration.  In the  event  of
insolvency  of the contra  party, the Fund might  be unable to  close out an OTC
option position at any time prior to its expiration.
 
     If a Fund were unable to effect a closing transaction for an option it  had
purchased,  it would  have to  exercise the  option to  realize any  profit. The
inability to enter into a closing purchase transaction for a covered call option
written by a Fund could cause material  losses because the Fund would be  unable
to  sell the investment  used as cover  for the written  option until the option
expires or is exercised.
 
     A Fund may  purchase and  write put  and call  options on  indices of  debt
securities  in much  the same manner  as the more  traditional options discussed
above,  except  the  index  options  may  serve  as  a  hedge  against   overall
fluctuations  in  the debt  securities market  (or  market sectors)  rather than
anticipated increases or decreases in the value of a particular security.
 
     GUIDELINES FOR OPTIONS.   Each  Fund's use of  options is  governed by  the
following  guidelines  which can  be changed  by the  Trust's board  of trustees
without shareholder vote:
 
          1. The Fund may purchase a put or call option, including any straddles
     or spreads, only  if the  value of its  premium, when  aggregated with  the
     premiums  on all other options purchased by the Fund, does not exceed 5% of
     the Fund's total assets.
 
          2. The aggregate value of securities underlying put options written by
     the Fund, determined as of the date  the put options are written, will  not
     exceed 50% of the Fund's net assets.
 
          3.  The aggregate premiums  paid on all  options (including options on
     securities and indices of debt securities and options on futures contracts)
     purchased by the Fund that are held at any time will not exceed 20% of  the
     Fund's net assets.
 
     FUTURES.   Each Fund may purchase  and sell interest rate futures contracts
and Low  Duration  Fund  may  purchase and  sell  debt  security  index  futures
contracts.  Each Fund also may purchase put  and call options, and write covered
put and call options,  on the futures  contracts it is  allowed to purchase  and
sell. The purchase of futures or call options thereon can serve as a long hedge,
and  the sale of futures or  the purchase of put options  thereon can serve as a
short hedge. Writing covered  call options on futures  contracts can serve as  a
limited  short hedge, and  writing covered put options  on futures contracts can
serve as a limited long hedge, using a strategy similar to that used for writing
covered call options on securities or indices.
 
     Futures strategies also  can be used  to manage the  average duration of  a
Fund's  portfolio. If Mitchell  Hutchins or PIMCO wishes  to shorten the average
duration of  a Fund,  the Fund  may sell  a futures  contract or  a call  option
thereon, or purchase a put option on that futures contract. If Mitchell Hutchins
or  PIMCO wishes to lengthen the average duration  of a Fund, the Fund may buy a
futures contract or a call option thereon or sell a put option thereon.
 
     Each Fund may  also write put  options on interest  rate futures  contracts
while  at the same time purchasing call options on the same futures contracts in
order synthetically to  create a  long futures contract  position. Such  options
would  have the same strike  prices and expiration dates.  A Fund will engage in
this strategy only when it is more  advantageous to the Fund than is  purchasing
the futures contract.
 
     No  price is paid  upon entering into  a futures contract.  Instead, at the
inception of a futures contract  a Fund is required  to deposit in a  segregated
account  with its custodian, in the name  of the futures broker through whom the
transaction was effected, 'initial margin'  consisting of cash, U.S.  government
securities  or other liquid, high-grade debt  securities, in an amount generally
equal to 10% or less of the  contract value. Margin must also be deposited  when
writing  a  call option  on a  futures contract,  in accordance  with applicable
 
                                       15
 

<PAGE>
<PAGE>
exchange rules.  Unlike margin  in securities  transactions, initial  margin  on
futures contracts does not represent a borrowing, but rather is in the nature of
a  performance bond  or good-faith  deposit that  is returned  to a  Fund at the
termination  of  the  transaction  if  all  contractual  obligations  have  been
satisfied.  Under certain circumstances,  such as periods  of high volatility, a
Fund may be required by an exchange to increase the level of its initial  margin
payment,  and initial  margin requirements might  be increased  generally in the
future by regulatory action.
 
     Subsequent 'variation margin'  payments are  made to and  from the  futures
broker  daily as  the value of  the future  position varies, a  process known as
'marking to market.'  Variation margin  does not involve  borrowing, but  rather
represents  a daily  settlement of  a Fund's  obligations to  or from  a futures
broker. When a  Fund purchases  an option  on a  future, the  premium paid  plus
transaction  costs is all that is at risk. In contrast, when a Fund purchases or
sells a futures contract or writes a call option thereon, it is subject to daily
variation margin calls that could be  substantial in the event of adverse  price
movements.  If the  Fund has  insufficient cash  to meet  daily variation margin
requirements, it might need  to sell securities  at a time  when such sales  are
disadvantageous.
 
     Holders  and writers of futures positions  and options on futures can enter
into  offsetting  closing  transactions,  similar  to  closing  transactions  on
options,  by selling or purchasing, respectively, an instrument identical to the
instrument held or written. Positions in  futures and options on futures may  be
closed  only on an exchange or board  of trade that provides a secondary market.
Each Fund intends to enter into futures transactions only on exchanges or boards
of trade where there appears to be a liquid secondary market. However, there can
be no assurance that  such a market  will exist for a  particular contract at  a
particular time.
 
     Under  certain circumstances, futures exchanges  may establish daily limits
on the amount that  the price of a  future or related option  can vary from  the
previous  day's settlement price; once  that limit is reached,  no trades may be
made that day  at a  price beyond  the limit. Daily  price limits  do not  limit
potential  losses  because prices  could  move to  the  daily limit  for several
consecutive days with little  or no trading,  thereby preventing liquidation  of
unfavorable positions.
 
     If a Fund were unable to liquidate a futures or options position due to the
absence of a liquid secondary market or the imposition of price limits, it could
incur  substantial losses. The Fund would continue  to be subject to market risk
with respect  to the  position. In  addition, except  in the  case of  purchased
options,  the Fund would continue to be  required to make daily variation margin
payments and might  be required  to maintain the  position being  hedged by  the
future or option or to maintain cash or securities in a segregated account.
 
     Certain  characteristics of the futures market might increase the risk that
movements in  the prices  of  futures contracts  or  related options  might  not
correlate  perfectly  with  movements in  the  prices of  the  investments being
hedged. For example, all participants in the futures and related options markets
are subject to daily variation margin calls and might be compelled to  liquidate
futures  or related  options positions  whose prices  are moving  unfavorably to
avoid being subject to  further calls. These  liquidations could increase  price
volatility  of the instruments and distort the normal price relationship between
the futures or options and the  investments being hedged. Also, because  initial
margin  deposit requirements in the futures  market are less onerous than margin
requirements in the securities markets,  there might be increased  participation
by  speculators  in the  futures markets.  This  participation also  might cause
temporary price distortions. In  addition, activities of  large traders in  both
the  futures and securities  markets involving arbitrage,  'program trading' and
other investment strategies might result in temporary price distortions.
 
                                       16
 

<PAGE>
<PAGE>
     GUIDELINES FOR FUTURES AND RELATED OPTIONS.  Each Fund's use of futures and
related options is governed by the following guidelines which can be changed  by
the Trust's board of trustees without shareholder vote:
 
          1. To the extent the Fund enters into futures contracts and options on
     futures  positions that are not for  bona fide hedging purposes (as defined
     by the CFTC), the aggregate initial margin and premiums on those  positions
     (excluding  the amount by which options  are 'in-the-money') may not exceed
     5% of the Fund's net assets.
 
          2. The aggregate premiums  paid on all  options (including options  on
     securities and indices of debt securities and options on futures contracts)
     purchased  by the Fund that are held at any time will not exceed 20% of the
     Fund's net assets.
 
          3. The aggregate margin deposits on all futures contracts and  options
     thereon held at any time by the Fund will not exceed 5% of the Fund's total
     assets.
 
   
     FOREIGN CURRENCY HEDGING STRATEGIES -- SPECIAL CONSIDERATIONS.  High Income
Fund  may use  options on  foreign currencies,  as described  above, and forward
currency contracts, as described below, to hedge against movements in the values
of the foreign currencies in which that Fund's securities are denominated.  Such
currency  hedges can protect  against price movements in  a security High Income
Fund owns or intends to acquire that are attributable to changes in the value of
the currency in which  it is denominated. Such  hedges do not, however,  protect
against price movements in the securities that are attributable to other causes.
    
 
   
     High  Income Fund  might seek to  hedge against  changes in the  value of a
particular currency when no Hedging  Instruments on that currency are  available
or  such  Hedging  Instruments are  more  expensive than  certain  other Hedging
Instruments. In such cases, High Income  Fund may hedge against price  movements
in  that currency  by entering  into transactions  using Hedging  Instruments on
another currency or a basket of currencies, the value of which Mitchell Hutchins
believes will have  a positive correlation  to the value  of the currency  being
hedged.  The risk that movements in the price of the Hedging Instrument will not
correlate perfectly with movements in the price of the currency being hedged  is
magnified when this strategy is used.
    
 
   
     The value of Hedging Instruments on foreign currencies depends on the value
of the underlying currency relative to the U.S. dollar. Because foreign currency
transactions  occurring  in  the interbank  market  might  involve substantially
larger amounts than those involved in the use of such Hedging Instruments,  High
Income  Fund could  be disadvantaged  by having  to deal  in the  odd lot market
(generally  consisting  of  transactions  of  less  than  $1  million)  for  the
underlying  foreign currencies at prices that  are less favorable than for round
lots.
    
 
   
     There is  no systematic  reporting  of last  sale information  for  foreign
currencies  or  any  regulatory requirement  that  quotations  available through
dealers or other market sources be firm or revised on a timely basis.  Quotation
information  generally  is  representative  of very  large  transactions  in the
interbank market and  thus might  not reflect odd-lot  transactions where  rates
might be less favorable. The interbank market in foreign currencies is a global,
round-the-clock  market. To the  extent the U.S. options  or futures markets are
closed while the markets for the underlying currencies remain open,  significant
price  and rate movements might take place in the underlying markets that cannot
be reflected in the markets for the Hedging Instruments until they reopen.
    
 
   
     Settlement of hedging  transactions involving foreign  currencies might  be
required to take place within the country issuing the underlying currency. Thus,
High Income Fund might be required to accept or make
    
 
                                       17
 

<PAGE>
<PAGE>
   
delivery  of  the underlying  foreign currency  in accordance  with any  U.S. or
foreign regulations regarding the maintenance of foreign banking arrangements by
U.S. residents  and  might  be required  to  pay  any fees,  taxes  and  charges
associated with such delivery assessed in the issuing country.
    
 
   
     FOREIGN  CURRENCY  CONTRACTS.   High  Income  Fund may  enter  into forward
currency contracts to purchase or sell foreign currencies for a fixed amount  of
U.S.  dollars or another  foreign currency. Such transactions  may serve as long
hedges -- for example, High Income Fund may purchase a forward currency contract
to lock in the U.S. dollar price of a security denominated in a foreign currency
that the Fund intends to acquire.  Forward currency transactions may also  serve
as  short hedges --  for example, High  Income Fund may  sell a forward currency
contract to  lock  in  the U.S.  dollar  equivalent  of the  proceeds  from  the
anticipated sale of a security denominated in a foreign currency.
    
 
   
     As  noted above, High Income Fund also may seek to hedge against changes in
the value of a particular currency by using forward contracts on another foreign
currency or  a  basket of  currencies,  the  value of  which  Mitchell  Hutchins
believes  will  have positive  correlation to  the value  of the  currency being
hedged. In addition, the  Fund may use forward  currency contracts to shift  its
exposure  to  foreign currency  fluctuations from  one  country to  another. For
example, if the  Fund owned  securities denominated  in a  foreign currency  and
Mitchell  Hutchins  believed that  currency  would decline  relative  to another
currency, it might enter into a forward currency contract to sell an appropriate
amount of the  first foreign currency,  with payment  to be made  in the  second
foreign  currency. Transactions  that use  two foreign  currencies are sometimes
referred to as 'cross  hedging.' Use of a  different foreign currency  magnifies
the  risk  that  movements in  the  price  of the  Hedging  Instrument  will not
correlate or will correlate unfavorably with the foreign currency being hedged.
    
 
   
     The cost to  High Income  Fund of  engaging in  forward currency  contracts
varies  with factors such as  the currency involved, the  length of the contract
period and  the  market conditions  then  prevailing. Because  forward  currency
contracts  are usually entered into on a principal basis, no fees or commissions
are involved. When the Fund enters  into a forward currency contract, it  relies
on  the contra party to make or take  delivery of the underlying currency at the
maturity of the contract. Failure by the  contra party to do so would result  in
the loss of any expected benefit of the transaction.
    
 
   
     As  is  the case  with futures  contracts, holders  and writers  of forward
currency contracts can  enter into offsetting  closing transactions, similar  to
closing  transactions  on futures,  by selling  or purchasing,  respectively, an
instrument identical  to the  instrument purchased  or sold.  Secondary  markets
generally  do not  exist for  forward currency  contracts, with  the result that
closing transactions generally can be  made for forward currency contracts  only
by  negotiating directly with the contra party.  Thus, there can be no assurance
that the Fund will in fact be able to close out a forward currency contract at a
favorable price prior to  maturity. In addition, in  the event of insolvency  of
the  contra party,  the Fund  might be  unable to  close out  a forward currency
contract at any time prior to maturity. In either event, the Fund would continue
to be subject to market risk with respect to the position, and would continue to
be required to maintain a position in the securities or currencies that are  the
subject of the hedge or to maintain cash or securities in a segregated account.
    
 
   
     The  precise matching of forward currency contract amounts and the value of
the securities involved generally will not be possible because the value of such
securities, measured  in the  foreign currency,  will change  after the  forward
currency  contract has  been established. Thus,  High Income Fund  might need to
purchase or sell foreign currencies in the spot (cash) market to the extent such
foreign currencies  are not  covered  by forward  contracts. The  projection  of
short-term  currency market movements is extremely difficult, and the successful
execution of a short-term hedging strategy is highly uncertain.
    
 
                                       18
 

<PAGE>
<PAGE>
   
     LIMITATIONS ON THE USE OF FORWARD CURRENCY CONTRACTS.  High Income Fund may
enter into  forward  currency contracts  or  maintain  a net  exposure  to  such
contracts  only if (1) the consummation of  the contracts would not obligate the
Fund to deliver  an amount of  foreign currency in  excess of the  value of  the
position  being hedged by  such contracts or (2)  the Fund maintains appropriate
assets in a segregated account in an amount not less than the value of its total
assets committed to the consummation of the contract and not covered as provided
in (1) above, as marked to market daily.
    
 
     INTEREST RATE PROTECTION TRANSACTIONS.   Each Fund may enter into  interest
rate  protection transactions, including  interest rate swaps  and interest rate
caps, collars and floors. Interest  rate swap transactions involve an  agreement
between  two  parties  to exchange  payments  that are  based,  respectively, on
variable and fixed rates of interest and  that are calculated on the basis of  a
specified  amount of principal (the 'notional principal amount') for a specified
period of time. Interest  rate cap and floor  transactions involve an  agreement
between  two parties  in which the  first party  agrees to make  payments to the
counterparty when a designated market interest rate goes above (in the case of a
cap) or below (in the case of a floor) a designated level on predetermined dates
or during a specified time period. Interest rate collar transactions involve  an
agreement  between  two parties  in which  payments are  made when  a designated
market interest rate either goes above a designated ceiling level or goes  below
a  designated floor  on predetermined dates  or during a  specified time period.
Each Fund intends to use these transactions as a hedge and not as a  speculative
investment.   Interest  rate  protection  transactions   are  subject  to  risks
comparable to those described above with respect to other hedging strategies.
 
     Each Fund may enter into interest  rate swaps, caps, collars and floors  on
either  an  asset-based or  liability-based basis,  depending  on whether  it is
hedging its assets or its liabilities, and will usually enter into interest rate
swaps on a net  basis, i.e., the  two payment streams are  netted out, with  the
Fund  receiving or paying,  as the case may  be, only the net  amount of the two
payments. Inasmuch as  these interest rate  protection transactions are  entered
into  for good faith hedging purposes,  and inasmuch as segregated accounts will
be established with respect to  such transactions, Mitchell Hutchins, PIMCO  and
the  Funds believe  such obligations  do not  constitute senior  securities and,
accordingly, will  not  treat  them  as being  subject  to  a  Fund's  borrowing
restrictions. The net amount of the excess, if any, of a Fund's obligations over
its  entitlements with respect to  each interest rate swap  will be accrued on a
daily basis and appropriate Fund assets  having an aggregate net asset value  at
least  equal to the accrued excess will be maintained in a segregated account as
described  above  in  'Investment   Policies  and  Restrictions  --   Segregated
Accounts.'  Each Fund also will establish  and maintain such segregated accounts
with respect to its total obligations under any interest rate swaps that are not
entered into on a net basis and with respect to any interest rate caps,  collars
and floors that are written by the Fund.
 
     A  Fund will  enter into  interest rate  protection transactions  only with
banks and recognized securities dealers  believed by Mitchell Hutchins or  PIMCO
to present minimal credit risks in accordance with guidelines established by the
Trust's  board of trustees. If there  is a default by the  other party to such a
transaction, the Fund will have to  rely on its contractual remedies (which  may
be limited by bankruptcy, insolvency or similar laws) pursuant to the agreements
related to the transaction.
 
     The swap market has grown substantially in recent years with a large number
of  banks and investment banking  firms acting both as  principals and as agents
utilizing standardized swap  documentation. Caps,  collars and  floors are  more
recent innovations for which documentation is less standardized, and accordingly
they are less liquid than swaps.
 
                                       19


<PAGE>
<PAGE>
             TRUSTEES AND OFFICERS; PRINCIPAL HOLDERS OF SECURITIES
 
     The  trustees and  executive officers  of the  Trust, their  ages, business
addresses and principal occupations during the past five years are:
 
<TABLE>
<CAPTION>
                                                POSITION                         BUSINESS EXPERIENCE;
NAME AND ADDRESS*; AGE                         WITH TRUST                        OTHER DIRECTORSHIPS
- ------------------------------------  -----------------------------  --------------------------------------------
 
   
<S>                                   <C>                            <C>
Margo N. Alexander**; 49                  Trustee and President      Mrs.  Alexander  is  president,  chief   ex-
                                                                       ecutive   officer   and   a   director  of
                                                                       Mitchell  Hutchins  (since  January  1995)
                                                                       and  also an executive  vice president and
                                                                       a director of PaineWebber. Mrs.  Alexander
                                                                       is  president and a director or trustee of
                                                                       30 investment companies for which Mitchell
                                                                       Hutchins   or   PaineWebber   serves    as
                                                                       investment adviser.
Richard Q. Armstrong; 60                         Trustee             Mr.  Armstrong is chairman  and principal of
78 West Brother Drive                                                  RQA  Enterprises  (management   consulting
Greenwich, CT 06830                                                    firm)  (since  April  1991  and  principal
                                                                       occupation   since   March   1995).    Mr.
                                                                       Armstrong  is  also  a director  of  Hi Lo
                                                                       Automotive, Inc.  He was  chairman of  the
                                                                       board,   chief   executive   officer   and
                                                                       co-owner of Adirondack Beverages (producer
                                                                       and  distributor   of  soft   drinks   and
                                                                       sparkling/still waters) (October
                                                                       1993-March  1995). He was a partner of the
                                                                       New England  Consulting Group  (management
                                                                       consulting  firm) (December 1992-September
                                                                       1993). He  was managing  director of  LMVH
                                                                       U.S.  Corporation (U.S.  subsidiary of the
                                                                       French  luxury  goods  conglomerate,  Luis
                                                                       Vuitton    Moet   Hennessey   Corporation)
                                                                       (1987-1991) and chairman  of its wine  and
                                                                       spirits subsidiary, Schieffelin & Somerset
                                                                       Company  (1987-1991).  Mr. Armstrong  is a
                                                                       director  or  trustee  of  29   investment
                                                                       companies  for which  Mitchell Hutchins or
                                                                       PaineWebber serves as investment adviser.
</TABLE>
    
 
                                       20
 

<PAGE>
<PAGE>
 
   
<TABLE>
<CAPTION>
                                                POSITION                         BUSINESS EXPERIENCE;
NAME AND ADDRESS*; AGE                         WITH TRUST                        OTHER DIRECTORSHIPS
- ------------------------------------  -----------------------------  --------------------------------------------
<S>                                   <C>                            <C>
E. Garrett Bewkes, Jr.**; 69             Trustee and Chairman of     Mr. Bewkes  is a  director of  Paine  Webber
                                          the Board of Trustees        Group  Inc. ('PW  Group') (holding company
                                                                       of  PaineWebber  and  Mitchell  Hutchins).
                                                                       Prior   to   December  1995,   he   was  a
                                                                       consultant to PW Group. Prior to 1988,  he
                                                                       was  chairman of the  board, president and
                                                                       chief  executive   officer   of   American
                                                                       Bakeries  Company.  Mr. Bewkes  is  also a
                                                                       director of Interstate Bakeries
                                                                       Corporation, NaPro  BioTherapeutics,  Inc.
                                                                       and a director or trustee of 30 investment
                                                                       companies  for which  Mitchell Hutchins or
                                                                       PaineWebber serves as investment adviser.
Richard R. Burt; 49                              Trustee             Mr. Burt is chairman of International Equity
1101 Connecticut Avenue, N.W.                                          Partners  (international  investments  and
Washington, D.C. 20036                                                 consulting  firm) (since March 1994) and a
                                                                       partner of McKinsey & Company  (management
                                                                       consulting  firm) (since 1991). He is also
                                                                       a director  of  American  Publishing  Com-
                                                                       pany.  He was the  chief negotiator in the
                                                                       Strategic Arms  Reduction Talks  with  the
                                                                       former  Soviet  Union (1989-1991)  and the
                                                                       U.S. Ambassador to the Federal Republic of
                                                                       Germany  (1985-1989).   Mr.  Burt   is   a
                                                                       director   or  trustee  of  29  investment
                                                                       companies for which  Mitchell Hutchins  or
                                                                       PaineWebber serves as investment adviser.
Mary C. Farrell**; 46                            Trustee             Ms.  Farrell is a  managing director, senior
                                                                       investment strategist  and member  of  the
                                                                       Investment Policy Committee of
                                                                       PaineWebber. Ms. Farrell joined
                                                                       PaineWebber  in 1982.  She is  a member of
                                                                       the  Financial  Women's  Association   and
                                                                       Women's   Economic   Roundtable   and   is
                                                                       employed as  a  regular panelist  on  Wall
                                                                       Street  Week with Louis Rukeyser. She also
                                                                       serves on the  Board of  Overseers of  New
                                                                       York  University's  Stern School  of Busi-
                                                                       ness. Ms. Farrell is a director or trustee
                                                                       of  29  investment  companies  for   which
                                                                       Mitchell Hutchins or PaineWebber serves as
                                                                       investment adviser.
</TABLE>
    
 
                                       21
 

<PAGE>
<PAGE>
 
<TABLE>
<CAPTION>
                                                POSITION                         BUSINESS EXPERIENCE;
NAME AND ADDRESS*; AGE                         WITH TRUST                        OTHER DIRECTORSHIPS
- ------------------------------------  -----------------------------  --------------------------------------------
<S>                                   <C>                            <C>
Meyer Feldberg; 54                               Trustee             Mr.   Feldberg  is  Dean  and  Professor  of
Columbia University                                                    Management  of  the  Graduate  School   of
101 Uris Hall                                                          Business,  Columbia  University.  Prior to
New York, New York 10027                                               1989, he  was  president of  the  Illinois
                                                                       Institute  of Technology. Dean Feldberg is
                                                                       also a  director  of  AMSCO  International
                                                                       Inc.,  Federated Department  Stores, Inc.,
                                                                       and   New   World   Communications   Group
                                                                       Incorporated  and a director or trustee of
                                                                       29 investment companies for which Mitchell
                                                                       Hutchins   or   PaineWebber   serves    as
                                                                       investment adviser.
George W. Gowen; 66                              Trustee             Mr.  Gowen is a  partner in the  law firm of
666 Third Avenue                                                       Dunnington, Bartholow &  Miller. Prior  to
New York, New York 10017                                               May 1994, he was a partner in the law firm
                                                                       of  Fryer, Ross & Gowen. Mr. Gowen is also
                                                                       a  director   of  Columbia   Real   Estate
                                                                       Investments,   Inc.  and   a  director  or
                                                                       trustee of  29  investment  companies  for
                                                                       which  Mitchell  Hutchins  or  PaineWebber
                                                                       serves as investment adviser.
</TABLE>
 
                                       22
 

<PAGE>
<PAGE>
 
   
<TABLE>
<CAPTION>
                                                POSITION                         BUSINESS EXPERIENCE;
NAME AND ADDRESS*; AGE                         WITH TRUST                        OTHER DIRECTORSHIPS
- ------------------------------------  -----------------------------  --------------------------------------------
<S>                                   <C>                            <C>
Frederic V. Malek; 59                            Trustee             Mr. Malek  is  chairman  of  Thayer  Capital
901 15th Street, N.W.                                                  Partners    (investment   bank)    and   a
Suite 300                                                              co-chairman and director of CB  Commercial
Washington, D.C. 20005                                                 Group  Inc.  (real  estate).  From January
                                                                       1992 to  November  1992, he  was  campaign
                                                                       manager  of Bush-Quayle '92.  From 1990 to
                                                                       1992, he was vice chairman and, from  1989
                                                                       to  1990, he was  president of North- west
                                                                       Airlines Inc., NWA  Inc. (holding  company
                                                                       of  Northwest  Airlines  Inc.)  and  Wings
                                                                       Holdings  Inc.  (holding  company  of  NWA
                                                                       Inc.)  Prior to  1989, he  was employed by
                                                                       the Marriott Corporation (hotels,
                                                                       restaurants, airline catering and contract
                                                                       feeding), where  he most  recently was  an
                                                                       executive  vice president and president of
                                                                       Marriott Hotels and Resorts. Mr. Malek  is
                                                                       also  a  director  of  American Management
                                                                       Systems, Inc., Automatic Data  Processing,
                                                                       Inc.,  Avis,  Inc., FPL  Group,  Inc., ICF
                                                                       International, Manor Care, Inc.,  National
                                                                       Education    Corporation   and   Northwest
                                                                       Airlines Inc. Mr. Malek  is a director  or
                                                                       trustee  of  29  investment  companies for
                                                                       which  Mitchell  Hutchins  or  PaineWebber
                                                                       serves as investment adviser.
Carl W. Schafer; 60                              Trustee             Mr.  Schafer  is president  of  the Atlantic
P.O. Box 1164                                                          Foundation  (charitable  foundation   sup-
Princeton, NJ 08542                                                    porting  mainly  oceanographic exploration
                                                                       and research). He  also is  a director  of
                                                                       Roadway   Express,  Inc.  (trucking),  The
                                                                       Guardian  Group  of  Mutual  Funds,  Evans
                                                                       Systems,  Inc. (a motor fuels, convenience
                                                                       store  and  diversified  company),  Hidden
                                                                       Lake   Gold  Mines   Ltd.  (gold  mining),
                                                                       Electronic Clearing House, Inc. (financial
                                                                       transactions  processing),   Wainoco   Oil
                                                                       Corporation and Nutraceutix, Inc.
                                                                       (biotechnology). Prior to January 1993, he
                                                                       was  chairman  of the  Investment Advisory
                                                                       Committee of  the  Howard  Hughes  Medical
                                                                       Institute.  Mr. Schafer  is a  director or
                                                                       trustee of  29  investment  companies  for
                                                                       which  Mitchell  Hutchins  or  PaineWebber
                                                                       serves as investment adviser.
</TABLE>
    
 
                                       23
 

<PAGE>
<PAGE>
 
   
<TABLE>
<CAPTION>
                                                POSITION                         BUSINESS EXPERIENCE;
NAME AND ADDRESS*; AGE                         WITH TRUST                        OTHER DIRECTORSHIPS
- ------------------------------------  -----------------------------  --------------------------------------------
<S>                                   <C>                            <C>
John R. Torell III; 56                           Trustee             Mr. Torell  is  chairman of  Torell  Manage-
767 Fifth Avenue                                                       ment,   Inc.  (financial  advisory  firm),
Suite 4605                                                             chairman   of    Telesphere    Corporation
New York, NY 10153                                                     (electronic  provider of  financial infor-
                                                                       mation) and a partner of Zilkha &  Company
                                                                       (merchant   bank  and  private  investment
                                                                       company). He  is the  former chairman  and
                                                                       chief executive officer of Fortune Bancorp
                                                                       (1990-1991  and  1990-1994, respectively).
                                                                       He is the  former chairman, president  and
                                                                       chief  executive  officer of  CalFed, Inc.
                                                                       (savings association) (1988  to 1989)  and
                                                                       the   former  president  of  Manufacturers
                                                                       Hanover Corp. (bank) (prior to 1988).  Mr.
                                                                       Torell is also a director of American Home
                                                                       Products  Corp.,  New Colt  Inc. (armament
                                                                       manufacturer)   and    Volt    Information
                                                                       Sciences  Inc. Mr. Torell is a director or
                                                                       trustee of  29  investment  companies  for
                                                                       which  Mitchell  Hutchins  or  PaineWebber
                                                                       serves as investment adviser.
Julieanna Berry; 32                          Vice President          Ms.  Berry  is  a   vice  president  and   a
                                                                       portfolio  manager  of  Mitchell Hutchins.
                                                                       Ms. Berry  is  a  vice  president  of  two
                                                                       investment  companies  for  which Mitchell
                                                                       Hutchins   or   PaineWebber   serves    as
                                                                       investment adviser.
Teresa M. Boyle; 37                          Vice President          Ms.  Boyle  is  a first  vice  president and
                                                                       manager-advisory administration of
                                                                       Mitchell Hutchins. Prior to November 1993,
                                                                       she was  compliance  manager  of  Hyperion
                                                                       Capital  Management,  Inc.,  an investment
                                                                       advisory firm.  Prior to  April 1993,  Ms.
                                                                       Boyle    was   a    vice   president   and
                                                                       manager-legal administration  of  Mitchell
                                                                       Hutchins. Ms. Boyle is a vice president of
                                                                       30 investment companies for which Mitchell
                                                                       Hutchins  or PaineWebber serves as invest-
                                                                       ment adviser.
Karen L. Finkel; 38                          Vice President          Mrs. Finkel is a first vice president and  a
                                                                       portfolio  manager  of  Mitchell Hutchins.
                                                                       Mrs. Finkel  is a  vice president  of  two
                                                                       investment  companies  for  which Mitchell
                                                                       Hutchins serves as investment adviser.
</TABLE>
    
 
                                       24
 

<PAGE>
<PAGE>
 
   
<TABLE>
<CAPTION>
                                                POSITION                         BUSINESS EXPERIENCE;
NAME AND ADDRESS*; AGE                         WITH TRUST                        OTHER DIRECTORSHIPS
- ------------------------------------  -----------------------------  --------------------------------------------
<S>                                   <C>                            <C>
Ellen R. Harris; 49                          Vice President          Ms. Harris  is  a managing  director  and  a
                                                                       portfolio  manager  of  Mitchell Hutchins.
                                                                       Ms. Harris is  a vice  president of  three
                                                                       investment  companies  for  which Mitchell
                                                                       Hutchins   or   PaineWebber   serves    as
                                                                       investment adviser.
James F. Keegan; 35                          Vice President          Mr.  Keegan is a senior vice president and a
                                                                       portfolio manager  of  Mitchell  Hutchins.
                                                                       Prior  to March  1996, he  was director of
                                                                       fixed  income  strategy  and  research  of
                                                                       Merrion  Group, L.P. From 1987 to 1994, he
                                                                       was a  vice  president  of  Bankers  Trust
                                                                       Company,  where  he  was  the  director of
                                                                       credit research for the global  investment
                                                                       management  group.  Mr. Keegan  is  a vice
                                                                       president of two investment companies  for
                                                                       which  Mitchell  Hutchins  or  PaineWebber
                                                                       serves as investment adviser.
Thomas J. Libassi; 37                        Vice President          Mr. Libassi is a senior vice president and a
                                                                       portfolio manager  of  Mitchell  Hutchins.
                                                                       Prior to May 1994, he was a vice president
                                                                       of  Keystone  Custodian  Funds  Inc.  with
                                                                       portfolio management  responsibility.  Mr.
                                                                       Libassi   is  a  vice  president  of  four
                                                                       investment companies  for  which  Mitchell
                                                                       Hutchins serves as investment adviser.
C. William Maher; 35                       Vice President and        Mr.  Maher is  a first vice  president and a
                                           Assistant Treasurer         senior manager of the mutual fund  finance
                                                                       division  of Mitchell  Hutchins. Mr. Maher
                                                                       is  a   vice   president   and   assistant
                                                                       treasurer  of 30  investment companies for
                                                                       which  Mitchell  Hutchins  or  PaineWebber
                                                                       serves as investment adviser.
Dennis McCauley; 49                          Vice President          Mr.  McCauley  is  a  managing  director and
                                                                       chief investment  officer-fixed income  of
                                                                       Mitchell Hutchins. Prior to December 1994,
                                                                       he    was   director   of   fixed   income
                                                                       investments  of   IBM   Corporation.   Mr.
                                                                       McCauley   is  a  vice   president  of  19
                                                                       investment companies  for  which  Mitchell
                                                                       Hutchins    or   PaineWebber   serves   as
                                                                       investment adviser.
</TABLE>
    
 
                                       25
 

<PAGE>
<PAGE>
 
<TABLE>
<CAPTION>
                                                POSITION                         BUSINESS EXPERIENCE;
NAME AND ADDRESS*; AGE                         WITH TRUST                        OTHER DIRECTORSHIPS
- ------------------------------------  -----------------------------  --------------------------------------------
<S>                                   <C>                            <C>
Ann E. Moran; 38                           Vice President and        Ms. Moran is  a vice  president of  Mitchell
                                           Assistant Treasurer         Hutchins.  Ms. Moran  is a  vice president
                                                                       and assistant treasurer  of 30  investment
                                                                       companies  for which  Mitchell Hutchins or
                                                                       PaineWebber serves as investment adviser.
Dianne E. O'Donnell; 43                    Vice President and        Ms. O'Donnell is a senior vice president and
                                                Secretary              deputy   general   counsel   of   Mitchell
                                                                       Hutchins.   Ms.   O'Donnell   is   a  vice
                                                                       president and secretary  of 30  investment
                                                                       companies  for which  Mitchell Hutchins or
                                                                       PaineWebber serves as investment adviser.
Victoria E. Schonfeld; 45                    Vice President          Ms. Schonfeld  is  a managing  director  and
                                                                       general   counsel  of  Mitchell  Hutchins.
                                                                       Prior to May  1994, she was  a partner  in
                                                                       the  law  firm  of  Arnold  &  Porter. Ms.
                                                                       Schonfeld  is  a  vice  president  of   30
                                                                       investment  companies  for  which Mitchell
                                                                       Hutchins   or   PaineWebber   serves    as
                                                                       investment adviser.
Paul H. Schubert; 33                       Vice President and        Mr. Schubert is a first vice president and a
                                           Assistant Treasurer         senior  manager of the mutual fund finance
                                                                       division of Mitchell Hutchins. From August
                                                                       1992  to  August  1994,  he  was  a   vice
                                                                       president at BlackRock Financial
                                                                       Management,  L.P. Prior to August 1992, he
                                                                       was an audit  manager with  Ernst &  Young
                                                                       LLP.  Mr. Schubert is a vice president and
                                                                       assistant  treasurer   of  30   investment
                                                                       companies  for which  Mitchell Hutchins or
                                                                       PaineWebber serves as investment adviser.
Nirmal Singh; 39                             Vice President          Mr. Singh is  a first vice  president and  a
                                                                       portfolio  manager  of  Mitchell Hutchins.
                                                                       Prior to September 1993,  he was a  member
                                                                       of   the  portfolio   management  team  at
                                                                       Merrill Lynch Asset  Management, Inc.  Mr.
                                                                       Singh   is  a   vice  president   of  five
                                                                       investment companies  for  which  Mitchell
                                                                       Hutchins    or   PaineWebber   serves   as
                                                                       investment adviser.
</TABLE>
 
                                       26
 

<PAGE>
<PAGE>
 
   
<TABLE>
<CAPTION>
                                                POSITION                         BUSINESS EXPERIENCE;
NAME AND ADDRESS*; AGE                         WITH TRUST                        OTHER DIRECTORSHIPS
- ------------------------------------  -----------------------------  --------------------------------------------
<S>                                   <C>                            <C>
Julian F. Sluyters; 35                     Vice President and        Mr. Sluyters is a senior vice president  and
                                                Treasurer              the  director of  the mutual  fund finance
                                                                       division of  Mitchell Hutchins.  Prior  to
                                                                       1991,  he was an audit senior manager with
                                                                       Ernst & Young LLP. Mr. Sluyters is a  vice
                                                                       president  and treasurer  of 30 investment
                                                                       companies for which  Mitchell Hutchins  or
                                                                       PaineWebber serves as investment adviser.
Mark A. Tincher; 40                          Vice President          Mr. Tincher is a managing director and chief
                                                                       investment officer-U.S. equity investments
                                                                       of Mitchell Hutchins. Prior to March 1995,
                                                                       he  was a vice  president and directed the
                                                                       U.S. funds management and equity  research
                                                                       areas of Chase Manhattan Private Bank. Mr.
                                                                       Tincher   is  a   vice  president   of  14
                                                                       investment companies  for  which  Mitchell
                                                                       Hutchins    or   PaineWebber   serves   as
                                                                       investment adviser.
Craig M. Varrelman; 37                       Vice President          Mr. Varrelman is a first vice president  and
                                                                       a  portfolio manager of Mitchell Hutchins.
                                                                       Mr. Varrelman is a vice president of  five
                                                                       investment  companies  for  which Mitchell
                                                                       Hutchins   or   PaineWebber   serves    as
                                                                       investment adviser.
Keith A. Weller; 34                        Vice President and        Mr.  Weller  is a  first vice  president and
                                           Assistant Secretary         associate  general  counsel  of   Mitchell
                                                                       Hutchins.  Prior  to May  1995, he  was an
                                                                       attorney in private  practice. Mr.  Weller
                                                                       is   a   vice   president   and  assistant
                                                                       secretary of 29  investment companies  for
                                                                       which  Mitchell  Hutchins  or  PaineWebber
                                                                       serves as investment adviser.
</TABLE>
    
 
- ------------
 
 * Unless otherwise indicated,  the business  address of each  listed person  is
   1285 Avenue of the Americas, New York, New York 10019.
 
** Mrs.  Alexander, Mr. Bewkes  and Ms. Farrell are  'interested persons' of the
   Trust as defined in the 1940 Act  by virtue of their positions with  Mitchell
   Hutchins, PaineWebber and/or PW Group.
 
   
     The  Trust  pays trustees  who are  not 'interested  persons' of  the Trust
$1,000 annually for each series of the Trust and $150 for each board meeting and
each separate meeting of a board committee. The Trust presently has five  series
and thus pays each such trustee $5,000 annually, plus any additional amounts due
for  board or  committee meetings.  Certain committee  chairs receive additional
compensation aggregating $15,000
    
 
                                       27
 

<PAGE>
<PAGE>
   
annually from all the funds within the PaineWebber fund complex. Trustees of the
Trust who are 'interested persons' receive  no compensation from the Trust.  All
trustees  are  reimbursed  for  any  expenses  incurred  in  attending meetings.
Trustees and officers  of the Trust  own in the  aggregate less than  1% of  the
shares   of  the  Fund.  Because   PaineWebber  and  Mitchell  Hutchins  perform
substantially all of the services necessary  for the operation of the Trust  and
the  Funds, the Trust requires no employees. No officer, director or employee of
Mitchell Hutchins or  PaineWebber presently receives  any compensation from  the
Trust for acting as a trustee or officer.
    
 
   
     The  table below includes certain  information relating to the compensation
of the  Trust's  current  trustees who  held  office  with the  Trust  or  other
PaineWebber funds during the fiscal year ended November 30, 1995.<
    
 
                               COMPENSATION TABLE
 
   
<TABLE>
<CAPTION>
                                                                                    TOTAL
                                                                                 COMPENSATION
                                                                 AGGREGATE         FROM THE
                                                                COMPENSATION    TRUST AND THE
                                                                    FROM            TRUST
                  NAME OF PERSON, POSITION                       THE TRUST*       COMPLEX`D'
- -------------------------------------------------------------   ------------    --------------
 
<S>                                                             <C>             <C>
Richard Q. Armstrong, Trustee................................      --              $  9,000
Richard Burt, Trustee........................................      --              $  7,750
Meyer Feldberg, Trustee......................................      $7,250          $106,375
George W. Gowen, Trustee.....................................      $7,250          $ 99,750
Frederick V. Malek, Trustee..................................      $7,250          $ 99,750
Carl W. Schafer, Trustee.....................................      --              $118,175
John R. Torell, III, Trustee.................................      --              $ 28,125
</TABLE>
    
 
- ------------
 
   
* Represents fees paid to each trustee during the fiscal year ended November 30,
  1995; the Trust does not have a pension or retirement plan.
    
 
`D' Represents  total compensation  paid to each  trustee during  the year ended
    December 31, 1995.
 
   
Only independent members of the board  of trustees are compensated by the  Trust
and  identified above; trustees who are  'interested persons,' as defined by the
1940 Act, do not receive compensation.
    
 
   
             BENEFICIAL OWNERSHIP OF GREATER THAN 5% OF FUND SHARES
    
 
   
     The following shareholders are shown in the Trust's records as owning  more
than 5% of Low Duration Income Fund's shares.
    
 
<TABLE>
<CAPTION>
                                                                     NUMBER AND PERCENTAGE OF
                                                                       SHARES BENEFICIALLY
                                                                              OWNED
                        NAME AND ADDRESS*                             AS OF JANUARY 31, 1996
- ------------------------------------------------------------------   ------------------------
 
<S>                                                                  <C>
Hilton Hotels Corporation.........................................     9,100,500.000 (7.2%)
Kern County Treasurer.............................................     8,585,131.170 (6.8%)
</TABLE>
 
- ------------
 
* Each  of the shareholders listed may  be contacted c/o Mitchell Hutchins Asset
  Management Inc., 1285 Avenue of the Americas, New York, NY 10019.
 
                                       28
 

<PAGE>
<PAGE>
               INVESTMENT ADVISORY AND DISTRIBUTION ARRANGEMENTS
 
   
     INVESTMENT ADVISORY ARRANGEMENTS.  Mitchell Hutchins acts as the investment
adviser and administrator  of the  Fund pursuant to  a contract  with the  Trust
dated  April 21, 1988, as  supplemented by a separate  fee agreement dated March
26, 1993 with respect to Low  Duration Income Fund ('Advisory Contract').  Under
the  Advisory Contract, the Trust pays Mitchell Hutchins an annual fee, computed
daily and paid monthly, at  the rate of 0.50% of  each Fund's average daily  net
assets.  During the fiscal years ended November  30, 1995, November 30, 1994 and
November 30,  1993,  respectively,  the  Trust paid  (or  accrued)  to  Mitchell
Hutchins  investment advisory and administrative  fees of $2,784,437, $3,958,127
and  $4,999,240  with  respect  to  U.S.  Government  Income  Fund,  $1,890,394,
$1,897,899  and  $1,393,289 with  respect to  Investment  Grade Income  Fund and
$3,050,197, $4,047,201 and $3,100,195 with  respect to High Income Fund.  During
the  fiscal years ended November  30, 1995 and November  30, 1994 and the period
May 3, 1993 (commencement  of operations) to November  30, 1993, the Trust  paid
(or accrued) to Mitchell Hutchins investment advisory and administrative fees of
$1,839,876,  $5,598,491 (of which $400,611 was  waived by Mitchell Hutchins) and
$3,519,442 with respect to Low Duration Income Fund.
    
 
   
     Under a service  agreement pursuant to  which PaineWebber provides  certain
services to each Fund not otherwise provided by the Fund's transfer agent, which
agreement  is reviewed  by the  Trust's board  of trustees  annually, during the
fiscal years ended November 30, 1995,  November 30, 1994 and November 30,  1993,
respectively,  PaineWebber earned fees  in the approximate  amounts of $154,428,
$196,490 and  $217,612 for  U.S. Government  Income Fund,  $99,641, $97,475  and
$60,450 for Investment Grade Income Fund and $158,323, $181,748 and $137,332 for
High  Income Fund. During the fiscal years  ended November 30, 1995 and November
30, 1994 and the period May 3, 1993 (commencement of operations) to November 30,
1993, respectively, PaineWebber earned fees  under the service agreement in  the
amounts of $107,999, $139,291 and $71,854 for Low Duration Income Fund.
    
 
     The  Advisory Contract authorizes  Mitchell Hutchins to  retain one or more
sub-advisers  but  does  not  require  Mitchell  Hutchins  to  do  so.  Under  a
sub-investment  advisory contract  ('Sub-Advisory Contract')  dated November 14,
1994 with Mitchell Hutchins, PIMCO serves as sub-adviser for Low Duration Income
Fund. Under the  Sub-Advisory Contract,  Mitchell Hutchins (not  the Fund)  pays
PIMCO  a fee  in the  annual amount  of 0.25%  of the  Fund's average  daily net
assets. PIMCO bears all expenses incurred by it in connection with its  services
under the Sub-Advisory Contract. For the fiscal year ended November 30, 1995 and
the  period October 20,  1994 to November  30, 1994, Mitchell  Hutchins paid (or
accrued) to  PIMCO sub-advisory  fees of  $919,938 and  $147,540,  respectively,
pursuant  to  the  Sub-Advisory  Contract  and  a  substantially  similar  prior
contract.
 
     Under the terms  of the  Advisory Contract,  each Fund  bears all  expenses
incurred  in  its  operation  that  are  not  specifically  assumed  by Mitchell
Hutchins. General expenses of the Trust not readily identifiable as belonging to
a particular series of  the Trust are  allocated among the  series of the  Trust
(including the Funds) by or under the direction of the Trust's board of trustees
in  such manner as  the board deems  fair and equitable.  Expenses borne by each
Fund include the following (or the Fund's share of the following): (1) the  cost
(including  brokerage commissions) of  securities purchased or  sold by the Fund
and any  losses  incurred in  connection  therewith;  (2) fees  payable  to  and
expenses incurred on behalf of the Fund by Mitchell Hutchins; (3) organizational
expenses;  (4)  filing  fees  and  expenses  relating  to  the  registration and
qualification of the Fund's shares under  federal and state securities laws  and
maintenance  of  such registrations  and qualifications;  (5) fees  and salaries
payable to trustees  who are  not interested persons  of the  Trust or  Mitchell
Hutchins;  (6) all expenses incurred in  connection with the trustees' services,
including travel expenses;
 
                                       29
 

<PAGE>
<PAGE>
(7) taxes (including any income or  franchise taxes) and governmental fees;  (8)
costs  of any liability, uncollectible items  of deposit and any other insurance
or fidelity bonds; (9) any costs, expenses or losses arising out of a  liability
of  or claim for damages or other relief  asserted against the Trust or the Fund
for violation  of  any  law;  (10)  legal,  accounting  and  auditing  expenses,
including  legal  fees of  special counsel  for  the independent  trustees; (11)
charges of custodians, transfer agents and other agents; (12) costs of preparing
share certificates; (13) expenses of  setting in type and printing  prospectuses
and  supplements thereto,  statements of additional  information and supplements
thereto, reports and  proxy materials  for existing shareholders,  and costs  of
mailing such materials to existing shareholders; (14) any extraordinary expenses
(including fees and disbursements of counsel) incurred by the Trust or the Fund;
(15)  fees, voluntary assessments and other expenses incurred in connection with
membership in  investment  company  organizations; (16)  costs  of  mailing  and
tabulating  proxies and  costs of  meetings of  shareholders, the  board and any
committees thereof; (17)  the cost  of investment company  literature and  other
publications  provided  to trustees  and officers;  and  (18) costs  of mailing,
stationery and communications equipment.
 
     As required by state regulation, Mitchell Hutchins will reimburse a Fund if
and to the  extent that  the aggregate  operating expenses  of the  Fund in  any
fiscal year exceed applicable limits. Currently, the most restrictive such limit
applicable  to the Fund is  2.5% of the first $30  million of the Fund's average
daily net assets, 2.0% of the next  $70 million of its average daily net  assets
and  1.5% of  its average daily  net assets  in excess of  $100 million. Certain
expenses, such as brokerage commissions, taxes, interest, distribution fees  and
extraordinary  items, are  excluded from this  limitation. For  the fiscal years
ended  November  30,  1995,  November  30,  1994  and  November  30,  1993,   no
reimbursements were required pursuant to such limitations.
 
     Under  the Advisory Contract, Mitchell Hutchins  will not be liable for any
error of judgment or mistake of law or  for any loss suffered by the Trust or  a
Fund in connection with the performance of the Contract, except a loss resulting
from  willful misfeasance, bad faith or gross negligence on the part of Mitchell
Hutchins in the  performance of  its duties or  from reckless  disregard of  its
duties  and obligations thereunder. Under  the Sub-Advisory Contract, PIMCO will
not be liable  for any  error of  judgment or  mistake of  law or  for any  loss
suffered  by the Trust,  Low Duration Income Fund,  its shareholders or Mitchell
Hutchins in connection with the  Sub-Advisory Contract, except any liability  to
any  of them  to which  PIMCO would  otherwise be  subject by  reason of willful
misfeasance, bad faith, gross negligence on  its part in the performance of  its
duties  or from reckless disregard by it of its obligations and duties under the
Sub-Advisory Contract.  The  Advisory  Contract  terminates  automatically  with
respect  to each  Fund upon  assignment and  is terminable  at any  time without
penalty by the Trust's board of trustees or by vote of the holders of a majority
of the  Fund's outstanding  voting  securities on  60  days' written  notice  to
Mitchell  Hutchins or  by Mitchell  Hutchins on 60  days' written  notice to the
Trust. The Sub-Advisory Contract terminates automatically upon its assignment or
the termination of the Advisory Contract and its terminable at any time  without
penalty  by the board of trustees or by vote of the holders of a majority of Low
Duration Income  Fund's outstanding  voting  securities on  60 days'  notice  to
PIMCO,  or  by PIMCO  on  120 days'  written  notice to  Mitchell  Hutchins. The
Sub-Advisory Contract  may also  be  terminated by  Mitchell Hutchins  (1)  upon
material  breach by  PIMCO of its  representations and  warranties, which breach
shall not have been cured  within a 20 day period  after notice of such  breach;
(2)  if PIMCO becomes unable  to discharge its duties  and obligations under the
Sub-Advisory Contract, or (3) on 120 days' notice to PIMCO.
 
   
     The following table shows the approximate net assets as of                ,
1996, sorted by category of investment objective, of the investment companies as
to  which  Mitchell Hutchins  serves as  adviser  or sub-adviser.  An investment
company may fall into more than one of the categories below.
    
 
                                       30
 

<PAGE>
<PAGE>
 
   
<TABLE>
<CAPTION>
                                                                                      NET
                                                                                    ASSETS
INVESTMENT CATEGORY                                                                 ($ MIL)
- --------------------------------------------------------------------------------   ---------
 
<S>                                                                                <C>
Domestic (excluding Money Market)...............................................   $
Global..........................................................................
Equity/Balanced.................................................................
Fixed Income (excluding Money Market)...........................................
     Taxable Fixed Income.......................................................
     Tax-Free Fixed Income......................................................
Money Market Funds..............................................................
</TABLE>
    
 
     Mitchell Hutchins personnel may invest in securities for their own accounts
pursuant to  a  code  of  ethics  that describes  the  fiduciary  duty  owed  to
shareholders  of  the  PaineWebber  mutual funds  and  other  Mitchell Hutchins'
advisory accounts by all Mitchell  Hutchins' directors, officers and  employees,
establishes   procedures   for   personal   investing   and   restricts  certain
transactions. For example,  employee accounts  generally must  be maintained  at
PaineWebber,  personal  trades  in  most  securities  require  pre-clearance and
short-term trading and participation in  initial public offerings generally  are
prohibited.  In addition, the code of ethics  puts restrictions on the timing of
personal investing in relation to trades  by PaineWebber mutual funds and  other
Mitchell Hutchins advisory clients.
 
     PIMCO  personnel  also  may invest  in  securities for  their  own accounts
pursuant to PIMCO's code  of ethics, which  establishes procedures for  personal
investing and restricts certain transactions.
 
     DISTRIBUTION  ARRANGEMENTS.  Mitchell  Hutchins acts as  the distributor of
the Class Y shares  of each Fund  under a distribution  contract with the  Trust
dated  July 1, 1991 ('Distribution Contract') that requires Mitchell Hutchins to
use its best efforts,  consistent with its other  businesses, to sell shares  of
the  Funds.  Class Y  shares of  the  Funds are  offered continuously.  Under an
exclusive dealer contract between Mitchell  Hutchins and PaineWebber dated  July
1,  1991 ('Exclusive  Dealer Contract'), PaineWebber  sells each  Fund's Class Y
shares.
 
                             PORTFOLIO TRANSACTIONS
 
   
     Subject to policies established by the Trust's board of trustees,  Mitchell
Hutchins or PIMCO, as applicable, is responsible for the execution of the Fund's
portfolio   transactions  and  the  allocation  of  brokerage  transactions.  In
executing portfolio transactions, Mitchell Hutchins and PIMCO seek to obtain the
best net results  for a  Fund, taking  into account  such factors  as the  price
(including the applicable brokerage commission or dealer spread), size of order,
difficulty  of  execution  and  operational  facilities  of  the  firm involved.
Generally, bonds are traded on the OTC market on a 'net' basis without a  stated
commission  through dealers  acting for  their own  account and  not as brokers.
Prices paid to dealers in  principal transactions generally include a  'spread,'
which  is the difference  between the prices  at which the  dealer is willing to
purchase and sell a specific security  at that time. While Mitchell Hutchins  or
PIMCO  generally seeks reasonably  competitive commission rates,  payment of the
lowest commission  is not  necessarily consistent  with obtaining  the best  net
results.  During  the fiscal  year ended  November  30, 1995,  no Fund  paid any
brokerage commissions.  During the  fiscal year  ended November  30, 1994,  U.S.
Government  Income Fund, Low Duration Income  Fund, Investment Grade Income Fund
and High  Income  Fund paid  approximately  $0, $88,421,  $21,500  and  $74,838,
respectively,  in brokerage commissions.  During the fiscal  year ended November
30, 1993, U.S. Government Income Fund  and Investment Grade Income Fund paid  no
brokerage  commissions  and  High  Income  Fund  paid  approximately  $4,145  in
brokerage commissions.
    
 
                                       31
 

<PAGE>
<PAGE>
   
During the period May 3, 1993 (commencement of operations) to November 30, 1993,
Low Duration Income Fund paid no brokerage commissions.
    
 
   
     No Fund has any obligation to deal  with any broker or group of brokers  in
the  execution of portfolio transactions. The Funds contemplate that, consistent
with the policy of obtaining the best net results, brokerage transactions may be
conducted through Mitchell  Hutchins or its  affiliates, including  PaineWebber.
The  Trust's board  of trustees has  adopted procedures in  conformity with Rule
17e-1 under  the 1940  Act to  ensure  that all  brokerage commissions  paid  to
Mitchell Hutchins or its affiliates are reasonable and fair. Specific provisions
in  the Advisory Contract authorize Mitchell  Hutchins and any of its affiliates
that  are  members  of  a  national  securities  exchange  to  effect  portfolio
transactions  for  the Funds  on  such exchange  and  to retain  compensation in
connection with such transactions.  Any such transactions  will be effected  and
related  compensation paid in accordance with applicable SEC regulations. During
the fiscal year ended November 30, 1995, no Fund paid any brokerage  commissions
to  PaineWebber or any  other affiliate of Mitchell  Hutchins. During the fiscal
year ended November  30, 1994, High  Income Fund paid  approximately $30,915  in
brokerage commissions to PaineWebber. During the fiscal years ended November 30,
1994  and November 30,  1993, the Funds  paid no other  brokerage commissions to
PaineWebber or any other affiliate of Mitchell Hutchins.
    
 
     Transactions in futures contracts  are executed through futures  commission
merchants  ('FCMs'), who receive brokerage  commissions for their services. Each
Fund's procedures  in  selecting FCMs  to  execute the  Fund's  transactions  in
futures  contracts, including procedures permitting the use of Mitchell Hutchins
and its affiliates,  are similar to  those in effect  with respect to  brokerage
transactions in securities.
 
   
     Consistent  with the interests of  a Fund and subject  to the review of the
Trust's board of  trustees, Mitchell  Hutchins or PIMCO  may cause  the Fund  to
purchase and sell portfolio securities through brokers who provide the Fund with
research,  analysis, advice and  similar services. In  return for such services,
the Fund may pay  to those brokers  a higher commission than  may be charged  by
other brokers, provided that Mitchell Hutchins or PIMCO determines in good faith
that   such  commission  is  reasonable  in  terms  either  of  that  particular
transaction or of the  overall responsibility of Mitchell  Hutchins to the  Fund
and  its other clients and  that the total commissions paid  by the Fund will be
reasonable in relation to the  benefits to the Fund  over the long term.  During
the  fiscal  year  ended November  30,  1995,  the Funds  directed  no portfolio
transactions to brokers chosen because they provided research services.
    
 
     For purchases or  sales with  broker-dealer firms which  act as  principal,
Mitchell  Hutchins and PIMCO seek best  execution. Although Mitchell Hutchins or
PIMCO may  receive certain  research or  execution services  in connection  with
these  transactions, neither will purchase securities  at a higher price or sell
securities at  a lower  price than  would otherwise  be paid  if no  weight  was
attributed  to the services provided by  the executing dealer. Moreover, neither
Mitchell  Hutchins  nor  PIMCO  will   enter  into  any  explicit  soft   dollar
arrangements  relating to  principal transactions  or will  receive in principal
transactions the types of  services which could be  purchased for hard  dollars.
Mitchell  Hutchins and PIMCO may engage in agency transactions in OTC equity and
debt  securities  in   return  for  research   and  execution  services.   These
transactions  are entered into only in  compliance with procedures ensuring that
the transaction (including  commissions) is at  least as favorable  as it  would
have been if effected directly with a market-maker that did not provide research
or  execution  services. These  procedures  include Mitchell  Hutchins  or PIMCO
receiving multiple quotes from  dealers before executing  the transaction on  an
agency basis.
 
     Information  and research services furnished by  dealers or brokers with or
through which a  Fund effects securities  transactions may be  used by  Mitchell
Hutchins    or   PIMCO    in   advising    other   funds    or   accounts   and,
 
                                       32
 

<PAGE>
<PAGE>
conversely, research services furnished to Mitchell Hutchins or PIMCO by dealers
or brokers in connection with other funds or accounts Mitchell Hutchins  advises
may  be used by Mitchell  Hutchins or PIMCO in  advising a Fund. Information and
research received from such brokers or dealers  will be in addition to, and  not
in lieu of, the services required to be performed by Mitchell Hutchins under the
Advisory Contract or PIMCO under the Sub-Advisory Contract.
 
   
     Investment decisions for the Funds and other investment accounts managed by
Mitchell  Hutchins or  PIMCO are  made independently of  each other  in light of
differing considerations for the various accounts. However, the same  investment
decision  may occasionally be made for a Fund  and one or more of such accounts.
In such cases, simultaneous transactions are inevitable. Purchases or sales  are
then  averaged  as  to price  and  allocated  between the  Fund  and  such other
account(s) as to amount according to a formula deemed equitable to the Fund  and
such  account(s). While  in some  cases this  practice could  have a detrimental
effect upon the price or value of the security as far as a Fund is concerned, or
upon its ability to  complete its entire  order, in other  cases it is  believed
that  coordination and the ability to participate in volume transactions will be
beneficial to the Fund.
    
 
     The Funds will not purchase securities that are offered in underwritings in
which Mitchell Hutchins or any of its affiliates is a member of the underwriting
or selling group except pursuant to  procedures adopted by the Trust's board  of
trustees  pursuant to Rule 10f-3  under the 1940 Act.  Among other things, these
procedures require that the commission or spread paid in connection with such  a
purchase  be reasonable  and fair,  that the  purchase be  at not  more than the
public offering price prior to the end of the first business day after the  date
of  the public offering and that Mitchell  Hutchins or any affiliate thereof not
participate in or benefit from the sale to the Fund.
 
   
     PORTFOLIO TURNOVER.  Each  Fund's annual portfolio  turnover rate may  vary
greatly  from year to year, but it will not be a limiting factor when management
deems portfolio changes appropriate. The  portfolio turnover rate is  calculated
by  dividing the lesser  of the Fund's  annual sales and  purchases of portfolio
securities (exclusive of purchases  or sales of  securities whose maturities  at
the  time of acquisition were one year or  less) by the monthly average value of
the securities in the portfolio during  the year. During the fiscal years  ended
November  30, 1995 and  November 30, 1994,  respectively, the portfolio turnover
rates were 206% and 358% for U.S. Government Income Fund; 242% and 246% for  Low
Duration  Income Fund; 149% and  142% for Investment Grade  Income Fund; and 94%
and 156% for High Income Fund.
    
 
                              VALUATION OF SHARES
 
     Each Fund determines  the net  asset value  per share  separately for  each
Class of shares as of the close of regular trading (currently 4:00 p.m., Eastern
time)  on the NYSE on each Business Day, which is defined as each Monday through
Friday when the NYSE is open. Currently the NYSE is closed on the observance  of
the  following holidays: New Year's Day,  Presidents' Day, Good Friday, Memorial
Day, Independence Day, Labor Day, Thanksgiving Day and Christmas Day.
 
     Where market  quotations are  readily available,  portfolio securities  are
valued  based  upon  market  quotations,  provided  such  quotations  adequately
reflect, in the judgment of  Mitchell Hutchins or PIMCO,  the fair value of  the
security. Where such market quotations are not readily available, securities are
valued   based  upon  appraisals  received  from   a  pricing  service  using  a
computerized matrix system  or based  upon appraisals  derived from  information
concerning  the security or similar  securities received from recognized dealers
in those securities. The  amortized cost method of  valuation generally is  used
with  respect to  debt obligations  with 60 days  or less  remaining to maturity
unless   the    Trust's    board    of    trustees    determines    that    this
 
                                       33
 

<PAGE>
<PAGE>
does  not represent fair value. All other securities or assets will be valued at
fair value as determined in good faith by or under the direction of the  Trust's
board of trustees.
 
   
     Foreign currency exchange rates are generally determined prior to the close
of  trading  on the  NYSE. Occasionally  events effecting  the value  of foreign
investments and such  exchange rates occur  between the time  at which they  are
determined  and  the close  of trading  on the  NYSE, which  events will  not be
reflected in a computation of High Income Fund's net asset value on that day. If
events materially affecting the value  of such investments or currency  exchange
rates  occur during such  time period, the  investments will be  valued at their
fair value by  or under  the direction  of the  Trust's board  of trustees.  The
foreign  currency exchange transactions of High  Income Fund conducted on a spot
(that is, cash)  basis are valued  at the  spot rate for  purchasing or  selling
currency  prevailing  on the  foreign exchange  market.  This rate  under normal
conditions differs from the prevailing exchange rate in an amount generally less
than one-tenth of one percent due to  the costs of converting from one  currency
to another.
    
 
                            PERFORMANCE INFORMATION
 
     Each  Fund's performance data  quoted in advertising  and other promotional
materials ('Performance Advertisements') represents past performance and is  not
intended  to indicate  future performance.  The investment  return and principal
value of  an  investment will  fluctuate  so  that an  investor's  shares,  when
redeemed, may be worth more or less than their original cost.
 
     Total   Return   Calculations.   Average   annual   total   return   quotes
('Standardized Return')  used  in  the  Fund's  Performance  Advertisements  are
calculated according to the following formula:
 
<TABLE>
<S>              <C>
 P(1 + T)'pp'n   = ERV
where: P         = a hypothetical initial payment of $1,000 to purchase shares of a specified Class
        T        = average annual total return of shares of that Class
        n        = number of years
        ERV      = ending redeemable value of a hypothetical $1,000 payment made at the beginning of that period.
</TABLE>
 
     Under   the  foregoing  formula,  the  time  periods  used  in  Performance
Advertisements will be based on rolling  calendar quarters, updated to the  last
day  of the  most recent  quarter prior to  submission of  the advertisement for
publication. Total return, or 'T' in  the formula above, is computed by  finding
the  average annual change in the value of an initial $1,000 investment over the
period.  All  dividends  and  other  distributions  are  assumed  to  have  been
reinvested at net asset value.
 
     Each  Fund also  may refer  in Performance  Advertisements to  total return
performance data that  are not  calculated according  to the  formula set  forth
above  ('Non-Standardized Return'). The  Fund calculates Non-Standardized Return
for specified periods of time by assuming an investment of $1,000 in Fund shares
and assuming the reinvestment of all dividends and other distributions. The rate
of return is determined by subtracting the initial value of the investment  from
the ending value and by dividing the remainder by the initial value.
 
   
     The  following  table  shows  performance information  for  Class  Y shares
(formerly Class C shares) of U.S. Government Income Fund and Low Duration Income
Fund for the periods indicated. Investment
    
 
                                       34
 

<PAGE>
<PAGE>
   
Grade Income Fund and High Income Fund had no Class Y shares outstanding  during
these periods. All returns for periods of more than one year are expressed as an
annualized average return:
    
 
<TABLE>
<CAPTION>
                                                                        U.S. GOVERNMENT    LOW DURATION
                                                                          INCOME FUND      INCOME FUND
                                                                        ---------------    ------------
<S>                                                                     <C>                <C>
Fiscal Year Ended November 30, 1995:
Standardized Return*.................................................         15.06%           0.83%
Non-Standardized Return..............................................         15.06            0.83
Inception to November 30, 1995:**
Standardized Return*.................................................          5.29            0.83
Non-Standardized Return..............................................          5.29            0.83
</TABLE>
 
- ------------
 
*   Class  Y shares  do not  impose an  initial or  a contingent  deferred sales
    charge; therefore,  Non-Standardized  Return is  identical  to  Standardized
    Return.
 
**  For  U.S. Government Income Fund, the inception  date for its Class Y shares
    is September 11, 1991; for Low Duration Income Fund, the inception date  for
    its Class Y shares is October 20, 1995.
 
     YIELD.     Yields  used  in  each  Fund's  Performance  Advertisements  are
calculated by dividing  the Fund's interest  income attributable to  a Class  of
shares  for a  30-day period  ('Period'), net  of expenses  attributable to such
Class, by  the  average number  of  shares of  such  Class entitled  to  receive
dividends  during  the  Period,  and  expressing  the  result  as  an annualized
percentage (assuming semi-annual compounding) of  the net asset value per  share
at  the end  of the  Period. Yield  quotations are  calculated according  to the
following formula:
 
<TABLE>
<S>              <C>   
                          a-b
                          ---
      YIELD =         2[(  cd   + 1)'pp'6  -  1]
where: a    =    interest earned during the Period attributable to a Class of shares
       b    =    expenses accrued for the Period attributable to a Class of shares (net of reimbursements)
       c    =    the average daily number of shares of the Class outstanding during the Period that were entitled to receive
                 dividends
       d    =    the net asset value per share on the last day of the Period.
</TABLE>
 
   
     Except as noted below, in  determining net investment income earned  during
the  Period (variable  'a' in the  above formula), the  Fund calculates interest
earned on each debt obligation held by it during the Period by (1) computing the
obligation's yield to  maturity, based  on the  market value  of the  obligation
(including  actual accrued interest) on the last  business day of the Period or,
if the  obligation was  purchased during  the Period,  the purchase  price  plus
accrued  interest and (2) dividing the yield to maturity by 360, and multiplying
the resulting quotient by the market  value of the obligation (including  actual
accrued  interest) to determine  the interest income on  the obligation for each
day of the period that the obligation is in the portfolio. Once interest  earned
is  calculated  in this  fashion  for each  debt  obligation held  by  the Fund,
interest earned during the Period is  then determined by totalling the  interest
earned on all debt obligations. For purposes of these calculations, the maturity
of an obligation with one or more call provisions is assumed to be the next date
on which the obligation reasonably can be expected to be called or, if none, the
maturity  date. The  yield of the  Funds' Class  Y shares for  the 30-day period
ended November 30, 1995 was 6.11% for U.S. Government Income Fund and 6.24%  for
Low  Duration Income Fund. Investment Grade Income Fund and High Income Fund had
no Class Y shares outstanding during this period.
    
 
     OTHER INFORMATION.  In Performance Advertisements each Fund may compare its
Standardized Return and/or  its Non-Standardized Return  with data published  by
Lipper  Analytical  Services, Inc.  ('Lipper')  for U.S.  government  funds, CDA
Investment Technologies, Inc. ('CDA'), Wiesenberger
 
                                       35
 

<PAGE>
<PAGE>
Investment Companies  Service  ('Wiesenberger'), Investment  Company  Data  Inc.
('ICD')  or Morningstar Mutual Funds ('Morningstar'), or with the performance of
U.S. Treasury securities of various maturities, recognized stock, bond and other
indices, including (but not limited to) the Salomon Brothers Bond Index,  Lehman
Bond  Index, Lehman Government/Corporate  Bond Index, the  Standard & Poor's 500
Composite Stock Price Index,  the Dow Jones Industrial  Average, and changes  in
the  Consumer Price Index as published by  the U.S. Department of Commerce. Such
companies also may include economic data and statistics published by the  United
States Bureau of Labor Statistics, such as the cost of living index, information
and   statistics  on  the   residential  mortgage  market   or  the  market  for
mortgage-backed securities, such as those published by the Federal Reserve Bank,
the Office of Thrift Supervision, Ginnie Mae, Fannie Mae and Freddie Mac and the
Lehman Mortgage-Backed  Securities  Index.  The  Fund also  may  refer  in  such
materials   to  mutual  fund  performance  rankings  and  other  data,  such  as
comparative  asset,  expense   and  fee  levels,   published  by  Lipper,   CDA,
Wiesenberger,  ICD or Morningstar. Performance  Advertisements also may refer to
discussions of the Fund and comparative mutual fund data and ratings reported in
independent periodicals, including (but not limited to) THE WALL STREET JOURNAL,
MONEY Magazine, FORBES,  BUSINESS WEEK, FINANCIAL  WORLD, BARRONS, FORTUNE,  THE
NEW  YORK  TIMES, THE  CHICAGO TRIBUNE,  THE WASHINGTON  POST and  THE KIPLINGER
LETTERS. Comparisons in Performance Advertisements may be in graphic form.
 
   
     A  Fund  may  include  discussions  or  illustrations  of  the  effects  of
compounding  in  Performance Advertisements.  'Compounding'  refers to  the fact
that, if dividends or other distributions on a Fund investment are reinvested by
being paid in additional Fund shares, any future income or capital  appreciation
of  the Fund would increase the value, not only of the original Fund investment,
but also  of the  additional Fund  shares received  through reinvestment.  As  a
result,  the value of  the Fund investment  would increase more  quickly than if
dividends or other distributions had been paid in cash.
    
 
     A Fund may also compare its performance with, or may otherwise discuss, the
performance of  bank  certificates of  deposit  (CDs)  as measured  by  the  CDA
Certificate  of Deposit Index and  the Bank Rate Monitor  National Index and the
averages of  yields of  CDs of  major  banks published  by Banxquote  (R)  Money
Markets.  In comparing a  Fund or its  performance to CDs  or to CD performance,
investors should keep in mind that bank CDs  are insured in whole or in part  by
an agency of the U.S. government and offer fixed principal and fixed or variable
rates  of interest, and that bank CD  yields may vary depending on the financial
institution offering the CD and prevailing  interest rates. Fund shares are  not
insured  or guaranteed by the U.S. government  and returns thereon and net asset
value will fluctuate.  The securities  held by  the Fund  generally have  longer
maturities  than most CDs and may  reflect interest rate fluctuations for longer
term securities.  An investment  in  the Fund  involves  greater risks  than  an
investment in either a money market fund or a CD.
 
                                     TAXES
 
     In  order to  continue to qualify  for treatment as  a regulated investment
company ('RIC') under the  Internal Revenue Code, each  Fund must distribute  to
its  shareholders for each taxable  year at least 90%  of its investment company
taxable income (consisting generally of net investment income and net short-term
capital gain)  ('Distribution Requirement')  and  must meet  several  additional
requirements. These requirements include the following: (1) the Fund must derive
at  least 90% of  its gross income  each taxable year  from dividends, interest,
payments with  respect to  securities loans  and gains  from the  sale or  other
disposition  of securities,  or other  income (including  gains from  options or
futures) derived  with  respect  to  its business  of  investing  in  securities
('Income  Requirement');  (2)  the  Fund  must  derive  less  than  30%  of  its
 
                                       36
 

<PAGE>
<PAGE>
gross income each taxable year from the sale or other disposition of securities,
options or futures held for  less than three months ('Short-Short  Limitation');
(3) at the close of each quarter of the Fund's taxable year, at least 50% of the
value  of its  total assets  must be  represented by  cash and  cash items, U.S.
government securities, securities of  other RICs and  other securities that  are
limited,  in respect of any one issuer, to  an amount that does not exceed 5% of
the value of the Fund's  total assets; and (4) at  the close of each quarter  of
the  Fund's taxable year, not more than 25% of the value of its total assets may
be invested  in  securities  (other  than  U.S.  government  securities  or  the
securities of other RICs) of any one issuer.
 
     Dividends  and  other  distributions  declared by  a  Fund  in  November or
December of any year and payable to  shareholders of record on a date in  either
of those months will be deemed to have been paid by the Fund and received by the
shareholders  on December 31 of  that year if the  distributions are paid by the
Fund during  the following  January. Accordingly,  those distributions  will  be
taxed  to shareholders (other  than shareholders who  are not subject  to tax on
their income generally) for the year in which that December 31 falls.
 
   
     U.S. Government  Income Fund  and  Low Duration  Income Fund  each  invests
exclusively  in debt securities and receives no dividend income; accordingly, no
portion of the dividends or other distributions paid by these Funds is  eligible
for  the  dividends-received deduction  allowed  to corporations.  Although High
Income Fund  and Investment  Grade Income  Fund are  authorized to  hold  equity
securities,  it is expected that any dividend  income received by the Funds will
be minimal.
    
 
     If Fund shares are sold at a loss after being held for six months or  less,
the  loss will be treated  as long-term, instead of  short-term, capital loss to
the extent of any capital gain distributions received on those shares. Investors
also should be aware that if shares are purchased shortly before the record date
for any dividend  or capital gain  distribution, the shareholder  will pay  full
price  for the shares  and receive some portion  of the price  back as a taxable
distribution.
 
   
     Interest and dividends, if any, received by High Income Fund may be subject
to income, withholding  or other  taxes imposed  by foreign  countries and  U.S.
possessions  that  would reduce  the yield  on  its securities.  Tax conventions
between certain  countries  and  the  United  States,  however,  may  reduce  or
eliminate these foreign taxes, and many foreign countries do not impose taxes on
capital gains in respect of investments by foreign investors.
    
 
     Each  Fund will be subject to a  nondeductible 4% excise tax ('Excise Tax')
to the  extent  it  fails  to  distribute  by  the  end  of  any  calendar  year
substantially  all of  its ordinary  income for that  year and  capital gain net
income for the one-year period ending on November 30 of that year, plus  certain
other amounts.
 
   
     The  use of hedging and option income strategies, such as writing (selling)
and purchasing options and futures and entering into forward currency contracts,
involves complex rules that will determine for income tax purposes the character
and timing of recognition of the gains and losses a Fund realizes in  connection
therewith.  Gains  from the  disposition of  foreign currencies  (except certain
gains therefrom that  may be  excluded by  future regulations),  and gains  from
options,  futures and forward currency contracts  derived by a Fund with respect
to its business of investing in  securities or foreign currencies, will  qualify
as  permissable income  under the Income  Requirement. However,  income from the
disposition of options and futures (other than those on foreign currencies) will
be subject to the Short-Short  Limitation if they are  held for less than  three
months.  Income from the disposition of foreign currencies, and options, futures
and forward contracts on foreign currencies, that are not directly related to  a
Fund's  principal business  of investing in  securities (or  options and futures
with respect to securities) also will  be subject to the Short-Short  Limitation
if they are held for less than three months.
    
 
                                       37
 

<PAGE>
<PAGE>
     If  a  Fund satisfies  certain  requirements, any  increase  in value  of a
position that is part of a 'designated hedge' will be offset by any decrease  in
value  (whether realized or  not) of the offsetting  hedging position during the
period of the hedge for purposes  of determining whether the Fund satisfies  the
Short-Short  Limitation. Thus,  only the net  gain (if any)  from the designated
hedge will be  included in gross  income for purposes  of that limitation.  Each
Fund  will consider whether it should seek to qualify for this treatment for its
hedging transactions. To the extent a Fund does not qualify for this  treatment,
it  may be forced to defer the closing out of certain options and futures beyond
the time when it otherwise would be advantageous to do so, in order for the Fund
to continue to qualify as a RIC.
 
     Each Fund may acquire zero coupon or other securities issued with  original
issue  discount ('OID'). As  a holder of  such securities, a  Fund would have to
include in its gross income  the OID that accrues  on the securities during  the
taxable  year, even if the Fund receives no corresponding payment on them during
the year. Each  Fund has elected  similar treatment with  respect to  securities
purchased  at a discount from their face value ('market discount'). Because each
Fund annually  must  distribute  substantially all  of  its  investment  company
taxable  income, including any  accrued OID and market  discount, to satisfy the
Distribution Requirement and avoid imposition of the Excise Tax, the Fund may be
required in a  particular year to  distribute as  a dividend an  amount that  is
greater  than the total amount of cash it actually receives. Those distributions
will be  made from  the Fund's  cash assets  or from  the proceeds  of sales  of
portfolio securities, if necessary. The Fund may realize capital gains or losses
from  those  sales,  which would  increase  or decrease  its  investment company
taxable income or  net capital gain  (the excess of  net long-term capital  gain
over  net short-term capital loss). In addition,  any such gains may be realized
on the disposition of securities held for less than three months. Because of the
Short-Short Limitation, any such gains would  reduce the Fund's ability to  sell
other securities, or certain options or futures, held for less than three months
that it might wish to sell in the ordinary course of its portfolio management.
 
                               OTHER INFORMATION
 
   
     PAINEWEBBER MANAGED INVESTMENTS TRUST.  Prior to October 20, 1995, the name
of  Low Duration Income Fund was  'PaineWebber Short-Term U.S. Government Income
Fund.' Prior to November 10, 1995, the Class Y shares of U.S. Government  Income
Fund and Low Duration Income Fund were called 'Class C' shares.
    
 
     The  Trust is  an entity  of the  type commonly  known as  a 'Massachusetts
business trust.' Prior to  February 26, 1992, the  Trust's name was  PaineWebber
Fixed  Income  Portfolios. Under  Massachusetts  law, shareholders  could, under
certain circumstances,  be held  personally liable  for the  obligations of  the
Trust or a Fund. However, the Trust's Declaration of Trust disclaims shareholder
liability  for acts or obligations  of the Trust or  the Funds and requires that
notice of such  disclaimer be given  in each note,  bond, contract,  instrument,
certificate  or undertaking made or issued by the trustees or by any officers or
officer by or on  behalf of the Trust,  a Fund, the trustees  or any of them  in
connection with the Trust. The Declaration of Trust provides for indemnification
from  each Fund's property for  all losses and expenses  of any shareholder held
personally liable  for  the  obligations  of  the Fund.  Thus,  the  risk  of  a
shareholder's  incurring financial loss  on account of  shareholder liability is
limited to circumstances  in which a  Fund itself  would be unable  to meet  its
obligations,  a possibility  that Mitchell Hutchins  believes is  remote and not
material. Upon payment  of any  liability incurred  by a  shareholder solely  by
reason  of  being or  having  been a  shareholder,  the shareholder  paying such
liability will be entitled to reimbursement from the general assets of the Fund.
The trustees intend to conduct the operations of  each Fund in such a way as  to
avoid,   as  far  as  possible,  ultimate  liability  of  the  shareholders  for
liabilities of the Fund.
 
                                       38
 

<PAGE>
<PAGE>
     COUNSEL.  The law  firm of Kirkpatrick &  Lockhart LLP, 1800  Massachusetts
Avenue, NW, Washington, DC 20036-1800, counsel to the Funds, has passed upon the
legality  of the shares offered by the Funds' Prospectus. Kirkpatrick & Lockhart
LLP also acts as counsel to Mitchell Hutchins and PaineWebber in connection with
other matters.
 
     INDEPENDENT AUDITORS.  Ernst & Young LLP, 787 Seventh Avenue, New York, New
York 10019, serves as independent auditors for the Trust.
 
                              FINANCIAL STATEMENTS
 
     The Funds'  Annual  Reports  to  Shareholders for  the  fiscal  year  ended
November  30,  1995  are  separate documents  supplied  with  this  Statement of
Additional Information  and the  financial  statements, accompanying  notes  and
reports  of independent  auditors appearing  therein relating  to the  Funds are
incorporated by reference in this Statement of Additional Information.
 
                                       39

<PAGE>
<PAGE>
NO  PERSON  HAS  BEEN  AUTHORIZED  TO  GIVE  ANY  INFORMATION  OR  TO  MAKE  ANY
REPRESENTATIONS NOT  CONTAINED  IN  THE  PROSPECTUS  OR  IN  THIS  STATEMENT  OF
ADDITIONAL  INFORMATION IN CONNECTION  WITH THE OFFERING  MADE BY THE PROSPECTUS
AND, IF GIVEN OR  MADE, SUCH INFORMATION OR  REPRESENTATIONS MUST NOT BE  RELIED
UPON AS HAVING BEEN AUTHORIZED BY THE FUNDS OR THEIR DISTRIBUTOR. THE PROSPECTUS
AND  THIS STATEMENT OF  ADDITIONAL INFORMATION DO NOT  CONSTITUTE AN OFFERING BY
THE FUNDS OR BY THE DISTRIBUTOR IN  ANY JURISDICTION IN WHICH SUCH OFFERING  MAY
NOT LAWFULLY BE MADE.
 
                            ------------------------
 
                               TABLE OF CONTENTS
 
   
<TABLE>
<CAPTION>
                                                  PAGE
                                                  ----
 
<S>                                               <C>
Investment Policies and Restrictions...........     2
Hedging and Related Income
  Strategies...................................    11
Trustees and Officers; Principal Holders of
  Securities...................................    20
Investment Advisory and Distribution
  Arrangements.................................    29
Portfolio Transactions.........................    31
Valuation of Shares............................    33
Performance Information........................    34
Taxes..........................................    36
Other Information..............................    38
Financial Statements...........................    39
</TABLE>
    
 
'c' 1996 PaineWebber Incorporated
 
                   Recycled
[Recycle Logo]     Paper
 
   
PAINEWEBBER
U.S. GOVERNMENT
INCOME FUND
PAINEWEBBER
LOW DURATION
U.S. GOVERNMENT
INCOME FUND
PAINEWEBBER
INVESTMENT GRADE
INCOME FUND
PAINEWEBBER
HIGH INCOME FUND
CLASS Y SHARES
    
 
- ------------------------------------------------------
 
   
                                             Statement of Additional Information
                                                                  July    , 1996
    
 
- ------------------------------------------------------
 
                                                                     PAINEWEBBER
 

<PAGE>
<PAGE>



                            PART C. OTHER INFORMATION

Item 24.       Financial Statements and Exhibits

 (a)    Financial Statements: (filed herewith)

        Included in Part A of this Registration Statement:

        Financial   Highlights  for  one  Class  Y  share  of  PaineWebber  U.S.
        Government  Income  Fund for each of the four years in the period  ended
        November 30, 1995 and the period  September  11, 1991  (commencement  of
        issuance of shares) to November 30, 1991.

        Financial  Highlights for one Class Y share of PaineWebber  Low Duration
        U.S.   Government   Income   Fund  for  the  period   October  20,  1995
        (commencement of issuance of shares) to November 30, 1995.

        Included in Part B of this  Registration  Statement for PaineWebber U.S.
Government Income Fund, PaineWebber Investment Grade Income Fund and PaineWebber
High Income Fund through  incorporation  by reference  from the annual report to
shareholders  previously  filed  with the  Securities  and  Exchange  Commission
through EDGAR on February 1, 1996 (Accession No. 0000950130-96-000345):

        Portfolio of Investments at November 30, 1995.

        Statement of Assets and Liabilities at November 30, 1995.

        Statement of Operations for the year ended November 30, 1995.

        Statement  of  Changes  in Net  Assets  for each of the two years in the
        period ended November 30, 1995.

        Notes to Financial Statements.

        Financial  Highlights for one Class A share of each Fund for each of the
        five years in the period ended November 30, 1995.

        Financial  Highlights for one Class B share of each Fund for each of the
        four years in the period ended  November 30, 1995 and the period July 1,
        1991 (commencement of issuance of shares) to November 30, 1991.

        Financial  Highlights for one Class C share of each Fund for each of the
        three years in the period ended November 30, 1995 and the period July 2,
        1992 (commencement of issuance of shares) to November 30, 1992.

        Financial  Highlights  for one Class Y share of U.S.  Government  Income
        Fund for each of the four years in the period  ended  November  30, 1995
        and the period  September 11, 1991  (commencement of issuance of shares)
        to November 30, 1991.

        Report of Ernst & Young LLP,  Independent  Auditors,  dated  January 25,
1996.


                                       C-1

<PAGE>
<PAGE>



        Included in Part B of this  Registration  Statement for  PaineWebber Low
Duration U.S. Government Income Fund through incorporation by reference from the
annual report to shareholders  previously filed with the Securities and Exchange
Commission through EDGAR on January 31, 1996 (Accession No.
0000950130-96-000346):

        Portfolio of Investments at November 30, 1995.

        Statement of Assets and Liabilities at November 30, 1995.

        Statement of Operations for the year ended November 30, 1995.

        Statement  of  Changes  in Net  Assets  for each of the two years in the
        period ended November 30, 1995.

        Notes to Financial Statements.

        Financial  Highlights  for one Class A share,  one Class B share and one
        Class C share of the Fund for each of the two years in the period  ended
        November  30,  1995  and  the  period  May  3,  1993   (commencement  of
        operations) to November 30, 1993.

        Financial  Highlights  for one Class Y share of the Fund for the  period
        October 20, 1995  (commencement  of issuance of shares) to November  30,
        1995.

        Report of Ernst & Young LLP,  Independent  Auditors,  dated  January 20,
        1996.
<TABLE>

<S>     <C>          <C>
(b)     Exhibits:
        (1)    (a)    Declaration of Trust 1/
               (b)    Amendment to Declaration of Trust effective January 28, 1988 2/
               (c)    Amendment to Declaration of Trust effective July 1, 1990 6/
               (d)    Amendment to Declaration of Trust effective March 21, 1991 7/
               (e)    Amendment to Declaration of Trust effective April 1, 1991 8/
               (f)    Amendment to Declaration of Trust effective July 1, 1991 11/
               (g)    Amendment to Declaration of Trust effective February 26, 1992 10/
               (h)    Amendment to Declaration of Trust effective January 25, 1993 12/
               (i)    Amendment to Declaration of Trust effective May 25, 1993 14/
               (j)    Amendment to Declaration of Trust effective July 30, 1993 14/
               (k)    Amendment to Declaration of Trust effective November 13, 1993 18/
               (l)    Amendment to Declaration of Trust effective July 20, 1995 20/
               (m)    Amendments to Declaration of Trust effective October 20, 1995, November 10, 1995 and
                      November 29, 1995 21/
        (2)    (a)    By-Laws 1/
               (b)  Amendment  to  By-Laws  effective  March  19,  1991  7/  (c)
               Amendment to By-Laws effective September 28, 1994 18/
        (3)    Voting trust agreement - none
        (4)    Instruments defining the rights of holders of the Registrant's shares of beneficial
               interest 19/
        (5)    (a)    Investment Advisory and Administration Contract 4/
               (b) Investment Advisory Fee Agreement with respect to PaineWebber
               Utility  Income Fund 15/ (c)  Investment  Advisory Fee  Agreement
               with respect to PaineWebber Low Duration U.S.
                      Government Income Fund 15/
        (6)    (a)    Distribution Contract with respect to Class A Shares 15/

                                       C-2

<PAGE>
<PAGE>



               (b) Distribution  Contract with respect to Class B Shares 15/ (c)
               Distribution  Contract  with  respect  to Class C Shares  21/ (d)
               Distribution  Contract  with  respect  to Class Y Shares  21/ (e)
               Exclusive Dealer Agreement with respect to Class A Shares 15/ (f)
               Exclusive Dealer Agreement with respect to Class B Shares 15/ (g)
               Exclusive Dealer Agreement with respect to Class C Shares 21/ (h)
               Exclusive Dealer Agreement with respect to Class Y Shares 21/
        (7)  Bonus,  profit  sharing  or  pension  plans  - none  (8)  Custodian
        Agreement 2/ (9) (a) Transfer Agency and Service Contract 6/
               (b)    Service Contract 5/
        (10)   (a)    Opinion and consent of Kirkpatrick & Lockhart LLP , counsel to the Registrant, with
                      respect to Class A and Class B shares of U.S. Government Income Fund, Investment
                      Grade Income Fund, and High Income Fund 8/
               (b)    Opinion  and  consent  of  Kirkpatrick  &  Lockhart  LLP ,
                      counsel  to the  Registrant,  with  respect to Class A and
                      Class B shares of PaineWebber Utility Income Fund 9/
               (c)    Opinion and consent of Kirkpatrick & Lockhart LLP, counsel
                      to the  Registrant,  with respect to Class C Shares of the
                      above-referenced Funds 11/
               (d)    Opinion and consent of Kirkpatrick & Lockhart LLP, counsel to the Registrant, with
                      respect to Class A, B and C shares of PaineWebber Low Duration U.S. Government
                      Income Fund 12/
               (e)    Opinion and Consent of Kirkpatrick & Lockhart LLP, counsel to
                      the Registrant, with respect to Class Y shares of PaineWebber
                      Low Duration U.S. Government Income Fund 20/
               (f)    Opinion and Consent of Kirkpatrick & Lockhart LLP, counsel
                      to the  Registrant,  with  respect  to Class Y  shares  of
                      PaineWebber  Investment  Grade Income Fund and PaineWebber
                      High Income Fund (filed herewith)
        (11)  Auditor's  Consent  (filed  herewith)
        (12)  Financial  statements omitted from prospectus - none
        (13)  Letter of investment  intent 3/
        (14)  Prototype  Retirement Plan 10/
        (15) (a) Plan pursuant to Rule 12b-1 with
             respect to Class A Shares 9/
               (b) Plan pursuant to Rule 12b-1 with respect to Class B Shares 9/
               (c) Plan  pursuant  to Rule 12b-1 with  respect to Class C Shares
               12/ (d)  Distribution Fee Addendum with respect to Class C shares
               of PaineWebber Low Duration
                      U.S. Government Income Fund 15/
        (16)   Schedule for Computation of Performance Quotations 8/
               (a)    Schedule for Computation of Performance Quotations for Class A shares of U.S.
                      Government Income Fund, Investment Grade Income Fund, and High Income Fund 7/
               (b)    Schedule for Computation of Performance Quotations for Class B shares of U.S.
                      Government Income Fund, Investment Grade Income Fund, and High Income Fund 10/
               (c)    Schedule for Computation of Performance Quotations for Class Y shares of U.S.
                      Government Income Fund 10/
               (d)    Schedule for Computation of Performance Quotations For Class C shares of U.S.
                      Government Income Fund, Investment Grade Income Fund, and High Income Fund 13/
               (e)    Schedule for  Computation  of  Performance  Quotations for
                      Class A, Class B and Class C shares of PaineWebber Utility
                      Income Fund 16/

                                       C-3

<PAGE>
<PAGE>



               (f)    Schedule for Computation of Performance Quotations for Class A, Class B, and Class C
                      shares of PaineWebber Low Duration U.S. Government Income Fund 16/
        (17)  and
        (27)   Financial Data Schedule (filed herewith)
        (18)   Plan pursuant to Rule 18f-3 22/


1/      Incorporated by reference from Post-Effective Amendment No. 5 to the registration statement, SEC
        File No. 2-91362, filed January 30, 1987.

2/      Incorporated by reference from Post-Effective Amendment No. 8 to the registration statement, SEC
        File No. 2-91362, filed March 31, 1988.

3/      Incorporated by reference from Pre-Effective Amendment No. 1 to the registration statement, SEC
        File No. 2-91362, filed July 18, 1984.

4/      Incorporated by reference from Post-Effective Amendment No. 10 to the registration statement, SEC
        File No. 2-91362, filed March 6, 1989.

5/      Incorporated by reference from Post-Effective Amendment No. 12 to the registration statement, SEC
        File No. 2-91362, filed January 31, 1990.

6/      Incorporated by reference from Post-Effective Amendment No. 15 to the registration statement, SEC
        File No. 2-91362, filed January 31, 1991.

7/      Incorporated by reference from Post-Effective Amendment No. 16 to the registration statement, SEC
        File No. 2-91362, filed March 28, 1991.

8/      Incorporated by reference from Post-Effective Amendment No. 18 to the registration statement, SEC
        File No. 2-91362, filed May 2, 1991.

9/      Incorporated by reference from Post-Effective Amendment No. 19 to the registration statement, SEC
        File No. 2-91362, filed March 2, 1992.

10/     Incorporated by reference from Post-Effective Amendment No. 20 to the registration statement, SEC
        File No. 2-91362, filed April 1, 1992.

11/     Incorporated by reference from Post-Effective Amendment No. 21 to the registration statement, SEC
        File No. 2-91362, filed May 1, 1992.

12/     Incorporated by reference from Post-Effective Amendment No. 23 to the registration statement, SEC
        File No. 2-91362, filed January 26, 1993.

13/     Incorporated by reference from Post-Effective Amendment No. 24 to the registration statement, SEC
        File No. 2-91362, filed April 1, 1993.

14/     Incorporated by reference from Post-Effective Amendment No. 25 to the registration statement, SEC
        File No. 2-91362, filed August 10, 1993.

                                       C-4

<PAGE>
<PAGE>




15/     Incorporated by reference from Post-Effective Amendment No. 26 to the registration statement, SEC
        File No. 2-91362, filed October 4, 1993.

16/     Incorporated by reference from Post-Effective Amendment No. 28 to the registration statement, SEC
        File No. 2-91362, filed April 1, 1994.

17/     Incorporated by reference from Post-Effective Amendment No. 30 to the registration statement, SEC
        File No. 2-91362, filed July 1, 1994.

18/     Incorporated by reference form Post-Effective Amendment No. 34 to the registration statement, SEC
        File No. 2-91362, filed January 27, 1995.

19/     Incorporated  by reference  from  Articles  III,  VIII,  IX, X and XI of
        Registrant's  Declaration  of Trust,  as amended  effective  January 28,
        1988,  July 1,  1990,  March 21,  1991,  April 1,  1991,  July 1,  1991,
        February 26, 1992,  January 25, 1993, July 30, 1993,  November 13, 1993,
        July 20, 1995, October 20, 1995, November 10, 1995 and November 29, 1995
        and from  Articles  II, VII and X of  Registrant's  By-Laws,  as amended
        March 19, 1993 and September 28, 1994.

20/     Incorporated by reference from Post-Effective Amendment No. 38 to the registration statement, SEC
        File No. 2-91362, filed September 5, 1995.

21/     Incorporated by reference from Post-Effective Amendment No. 39 to the registration statement, SEC
        File No. 2-91362, filed February 14, 1996.

22/     Incorporated by reference from Post-Effective Amendment No. 40 to the registration statement, SEC
        File No. 2-91362, filed March 29, 1996.
</TABLE>

Item 25.  Persons Controlled by or under Common Control with
               Registrant
        None.

Item 26.  Number of Holders of Securities

                                                          Number of Record
Title of Class                                            Shareholders as of
                                                          May 17, 1996

Shares of beneficial interest, par value $0.001 per
share, in

U.S. Government Income Fund

        Class A Shares                                    26,755

        Class B Shares                                     5,366

        Class C Shares                                     3,173

        Class Y Shares                                       185

Investment Grade Income Fund

        Class A Shares                                    16,177


                                       C-5

<PAGE>
<PAGE>




   
        Class B Shares                                     3,644

        Class C Shares                                     2,001

        Class Y Shares                                         0

High Income Fund

        Class A Shares                                    15,841

        Class B Shares                                    11,897

        Class C Shares                                     6,058

        Class Y Shares                                         0

PaineWebber Utility Income Fund

        Class A Shares                                       920

        Class B Shares                                     3,011

        Class C Shares                                     1,054

        Class Y Shares                                         0

PaineWebber Low Duration U.S. Government Income Fund

        Class A Shares                                     1,048

        Class B Shares                                       890

        Class C Shares                                    16,107

        Class Y Shares                                        39

    


Item 27.  Indemnification

        Section 2 of  "Indemnification" in Article X of the Declaration of Trust
provides  that the  Registrant  will  indemnify its trustees and officers to the
fullest extent permitted by law against claims and expenses  asserted against or
incurred  by them by  virtue  of being or  having  been a  trustee  or  officer;
provided  that no such  person  shall be  indemnified  where  there  has been an
adjudication or other determination, as described in Article X, that such person
is  liable  to  the  Registrant  or  its   shareholders  by  reason  of  willful
misfeasance,  bad faith,  gross  negligence or reckless  disregard of the duties
involved in the conduct of his or her office or did not act in good faith in the
reasonable  belief  that  his or her  action  was in the  best  interest  of the
Registrant.  Section 2 of  "Indemnification" in Article X also provides that the
Registrant   may   maintain   insurance   policies   covering   such  rights  of
indemnification.

        Additionally,  "Limitation of Liability" in Article X of the Declaration
of Trust provides that the trustees or officers of the  Registrant  shall not be
personally liable to any person extending credit to, contracting with, or having
a claim against,  the Trust; and that,  provided they have exercised  reasonable
care and have acted under the reason- able belief that their  actions are in the
best interest of the  Registrant,  the trustees and officers shall not be liable
for neglect or wrongdoing by them or any officer,  agent, employee or investment
adviser of the Registrant.

                                       C-6

<PAGE>
<PAGE>




        Section  2 of  Article  XI of  the  Declaration  of  Trust  additionally
provides  that,  subject  to the  provisions  of  Section 1 of Article XI and to
Article X, the  trustees  shall not be liable for errors of judgment or mistakes
of fact or law, or for any act or omission in accordance  with advice of counsel
or other experts,  or failing to follow such advice, with respect to the meaning
and operation of the Declaration of Trust.

        Article XI of the By-Laws  provides that the Registrant may purchase and
maintain  insurance on behalf of any person who is or was a trustee,  officer or
employee  of the Trust,  or is or was  serving at the  request of the Trust as a
trustee, officer or employee of a corporation, partnership, joint venture, trust
or other  enterprise  against  any  liability  asserted  against  him or her and
incurred by him or her in any such  capacity or arising out of his or her status
as such,  whether or not the Registrant would have the power to indemnify him or
her  against  such  liability,  provided  that the  Registrant  may not  acquire
insurance  protecting any trustee or officer against liability to the Registrant
or its  shareholders  to which he or she would otherwise be subject by reason of
willful misfeasance,  bad faith, gross negligence,  or reckless disregard of the
duties involved in the conduct of his or her office.

        Section 9 of the Investment  Advisory and  Administration  Contract (the
"Contract")   between  Mitchell   Hutchins  Asset  Management  Inc.   ("Mitchell
Hutchins") and the Trust provides that Mitchell Hutchins shall not be liable for
any  error  of  judgment  or  mistake  of law or for any  loss  suffered  by the
Registrant in connection with the matters to which the Contract relates,  except
for a loss resulting from willful misfeasance, bad faith, or gross negligence of
Mitchell  Hutchins  in the  performance  of its  duties  or  from  its  reckless
disregard of its  obligations  and duties under the Contract.  Section 10 of the
Contract  provides that the trustees shall not be liable for any  obligations of
the Trust under the Contract and that Mitchell  Hutchins  shall look only to the
assets and property of the Trust in settlement of such right or claim and not to
the assets and property of the trustees.

        Section 9 of each  Distribution  Contract  provides  that the Trust will
indemnify Mitchell Hutchins and its officers,  directors or controlling  persons
against all  liabilities  arising from any alleged untrue  statement of material
fact in the Registration  Statement or from any alleged omission to state in the
Registration  Statement a material fact required to be stated in it or necessary
to make the  statements  in it, in light of the  circumstances  under which they
were made,  not  misleading,  except  insofar as  liability  arises  from untrue
statements or omissions made in reliance upon and in conformity with information
furnished  by  Mitchell  Hutchins  to the  Trust  for  use  in the  Registration
Statement; and provided that this indemnity agreement shall not protect any such
persons  against  liabilities  arising  by  reason  of their  bad  faith,  gross
negligence  or willful  misfeasance;  and shall not inure to the  benefit of any
such persons unless a court of competent  jurisdiction or controlling  precedent
determines  that such result is not against  public  policy as  expressed in the
Securities Act of 1933.  Section 9 of each  Distribution  Contract also provides
that  Mitchell  Hutchins  agrees to  indemnify,  defend and hold the Trust,  its
officers and trustees free and harmless of any claims arising out of any alleged
untrue  statement  or  any  alleged  omission  of  material  fact  contained  in
information furnished by Mitchell Hutchins for use in the Registration Statement
or arising out of an agreement  between Mitchell Hutchins and any retail dealer,
or arising  out of  supplementary  literature  or  advertising  used by Mitchell
Hutchins in connection with each Distribution Contract.

        Section 9 of each Exclusive Dealer Agreement contains provisions similar
to  Section  9 of  each  Distribution  Contract,  with  respect  to  PaineWebber
Incorporated ("PaineWebber").

        Section 6 of the Service  Contract  provides that  PaineWebber  shall be
indemnified and held harmless by the Trust against all liabilities, except those
arising out of bad faith,  gross  negligence,  willful  misfeasance  or reckless
disregard of its duties under the Service Contract.


                                       C-7

<PAGE>
<PAGE>



        Section 10 of each  Distribution  Contract  and Section 7 of the Service
Contract  contain  provisions  similar to that of  Section 10 of the  Investment
Advisory and  Administration  Contract,  with  respect to Mitchell  Hutchins and
PaineWebber, as appropriate.

        Insofar as indemnification  for liabilities arising under the Securities
Act of 1933, as amended,  may be provided to trustees,  officers and controlling
persons of the Trust,  pursuant to the foregoing  provisions  or otherwise,  the
Trust has been  advised  that in the  opinion  of the  Securities  and  Exchange
Commission such indemnification is against public policy as expressed in the Act
and is, therefore,  unenforceable. In the event that a claim for indemnification
against  such  liabilities  (other  than the  payment  by the Trust of  expenses
incurred  or paid by a trustee,  officer or  controlling  person of the Trust in
connection  with the  successful  defense of any action,  suit or  proceeding or
payment pursuant to any insurance  policy) is asserted against the Trust by such
trustee,  officer or controlling  person in connection with the securities being
registered,  the Trust will, unless in the opinion of its counsel the matter has
been  settled  by  controlling  precedent,  submit  to a  court  of  appropriate
jurisdiction the question whether such  indemnification  by it is against public
policy as expressed in the Act and will be governed by the final adjudication of
such issue.

Item 28.  Business and Other Connections of Investment Adviser

Mitchell Hutchins, a Delaware  corporation,  is a registered  investment advisor
and is a wholly  owned  subsidiary  of  PaineWebber  which is, in turn, a wholly
owned  subsidiary  of Paine  Webber  Group Inc.  Mitchell  Hutchins is primarily
engaged in the investment advisory business.  Information as to the officers and
directors  of  Mitchell  Hutchins is included in its Form ADV, as filed with the
Securities  and Exchange  Commission  (registration  number  801-13219),  and is
incorporated herein by reference.

Pacific  Investment  Management  Company  ("PIMCO")  serves as  sub-adviser  for
PaineWebber  Low  Duration  U.S.  Government  Income  Fund.  PIMCO,  a  Delaware
partnership,  is a  registered  investment  adviser  and  a  subsidiary  general
partnership of PIMCO Advisors L.P. ("PIMCO  Advisors").  A majority  interest in
PIMCO Advisors is held by PIMCO Partners,  G.P., a general  partnership  between
Pacific  Financial  Asset  Management  Corporation,  an  indirect  wholly  owned
subsidiary of Pacific Mutual Life Insurance Company ("Pacific Mutual") and PIMCO
Partners,  L.L.C., a limited liability company  controlled by the PIMCO Managing
Directors.  PIMCO is  primarily  engaged in the  investment  advisory  business.
Information  as to the officers and Managing  Directors and partners of PIMCO is
included in its Form ADV, as filed with the Securities  and Exchange  Commission
(registration number 801-48187), and is incorporated herein by reference.

Item 29.       Principal Underwriters

(a)     Mitchell Hutchins  serves  as  principal  underwriter  and/or investment
adviser for the following other investment companies:

        .      ALL-AMERICAN TERM TRUST INC.
        .      GLOBAL HIGH INCOME DOLLAR FUND INC.
        .      GLOBAL SMALL CAP FUND INC.
        .      INSURED MUNICIPAL INCOME FUND INC.
        .      INVESTMENT GRADE MUNICIPAL INCOME FUND INC.
        .      MANAGED HIGH YIELD FUND INC.
        .      PAINEWEBBER AMERICA FUND
        .      PAINEWEBBER FINANCIAL SERVICES GROWTH FUND INC.
        .      PAINEWEBBER INVESTMENT SERIES

                                       C-8

<PAGE>
<PAGE>



        .      PAINEWEBBER INVESTMENT TRUST
        .      PAINEWEBBER INVESTMENT TRUST II
        .      PAINEWEBBER INVESTMENT TRUST III
        .      PAINEWEBBER MANAGED ASSETS TRUST
        .      PAINEWEBBER MANAGED INVESTMENTS TRUST
        .      PAINEWEBBER MASTER SERIES, INC.
        .      PAINEWEBBER MUNICIPAL SERIES
        .      PAINEWEBBER MUTUAL FUND TRUST
        .      PAINEWEBBER OLYMPUS FUND
        .      PAINEWEBBER SECURITIES TRUST
        .      PAINEWEBBER SERIES TRUST
        .      STRATEGIC GLOBAL INCOME FUND, INC.
        .      TRIPLE A AND GOVERNMENT SERIES - 1997, INC.
        .      2002 TARGET TERM TRUST INC.


(b)  Mitchell  Hutchins  is  the  principal   underwriter  for  the  Registrant.
PaineWebber  acts as  exclusive  dealer  for the shares of the  Registrant.  The
directors and officers of Mitchell Hutchins,  their principal business addresses
and their  positions  and offices with Mitchell  Hutchins are  identified in its
Form ADV, as filed with the  Securities  and Exchange  Commission  (registration
number  801-13219).  The directors and officers of PaineWebber,  their principal
business  addresses  and  their  positions  and  offices  with  PaineWebber  are
identified in its Form ADV, as filed with the Securities and Exchange Commission
(registration number 801-7163). The foregoing information is hereby incorporated
by reference.  The  information set forth below is furnished for those directors
and officers of Mitchell  Hutchins or PaineWebber  who also serve as trustees or
officers of the Registrant:


<TABLE>
<CAPTION>

Name and Principal                           Position With            Position and Offices With
Business Address                             Registrant               Underwriter or Exclusive Dealer


<S>                                          <C>                      <C> 
   
Margo N. Alexander                           President and Trustee    Director, President and Chief
1285 Avenue of the Americas                                           Executive Officer of Mitchell
New York, New York 10019                                              Hutchins and Director and
                                                                      Executive Vice President of
                                                                      PaineWebber


Mary C. Farrell                              Trustee                  Managing Director, Senior
1285 Avenue of the Americas                                           Investment Strategist and member
New York, New York 10019                                              of Investment Policy Committee
                                                                      of PaineWebber

    
Julianna Berry                               Vice President           Vice President and a Portfolio
1285 Avenue of the Americas                                           Manager of Mitchell Hutchins
New York, New York 10019



                                       C-9

<PAGE>
<PAGE>






Teresa M. Boyle                              Vice President           First Vice President and Manager
1285 Avenue of the Americas                                           - Advisory  Administration of
New York, New York 10019                                              Mitchell Hutchins

   
    
Karen L. Finkel                              Vice President           First Vice President and a
1285 Avenue of the Americas                                           Portfolio Manager of Mitchell
New York, New York 10019                                              Hutchins


Ellen R. Harris                              Vice President           Managing Director and a
1285 Avenue of the Americas                                           Portfolio Manager of Mitchell
New York, New York 10019                                              Hutchins

   
James F. Keegan                              Vice President           Senior Vice President and a
1285 Avenue of the Americas                                           Portfolio Manager of Mitchell
New York, New York 10019                                              Hutchins

    
Thomas J. Libassi                            Vice President           Senior Vice President and a
1285 Avenue of the Americas                                           Portfolio Manager of Mitchell
New York, New York 10019                                              Hutchins


C. William Maher                             Vice President and       First Vice President and a
1285 Avenue of the Americas                  Assistant                Senior Manger of the Mutual Fund
New York, New York 10019                     Treasurer                Finance Division
                                                                      of Mitchell Hutchins


Dennis McCauley                              Vice President           Managing Director and Chief
1285 Avenue of the Americas                                           Investment Officer - Fixed
New York, New York 10019                                              Income of Mitchell Hutchins


Ann E. Moran                                 Vice President           Vice President of
1285 Avenue of the Americas                  and Assistant            Mitchell Hutchins
New York, New York 10019                     Treasurer


Dianne E. O'Donnell                          Vice President           Senior Vice President and Deputy
1285 Avenue of the Americas                  and Secretary            General Counsel of Mitchell
New York, New York 10019                                              Hutchins


Victoria E. Schonfeld                        Vice President           Managing Director and General
1285 Avenue of the Americas                                           Counsel of Mitchell Hutchins
New York, New York 10019


Paul H. Schubert                             Vice President           First Vice President of Mitchell
1285 Avenue of the Americas                  and Assistant            Hutchins
New York, New York 10019                     Treasurer



                                      C-10

<PAGE>
<PAGE>






Nirmal Singh                                 Vice President           First Vice President and a
1285 Avenue of the Americas  New York,                                Portfolio Manager of Mitchell
New York 10019                                                        Hutchins


Julian F. Sluyters                           Vice President           Senior Vice President and
1285 Avenue of the Americas  New York,       and Treasurer            Director of Mutual Fund Finance
New York 10019                                                        Division of Mitchell Hutchins


Mark A. Tincher                              Vice President           Managing Director and Chief
1285 Avenue of the Americas                                           Investment Officer - U.S. Equity
New York, New York 10019                                              Investments of Mitchell Hutchins

   
    
Craig M. Varrelman                           Vice President           First Vice President and a
1285 Avenue of the Americas                                           Portfolio Manager of Mitchell
New York, New York 10019                                              Hutchins


Keith A. Weller                              Vice President           First Vice President and
1285 Avenue of the Americas                  and Assistant            Associate General Counsel of
New York, New York 10019                     Secretary                Mitchell Hutchins


</TABLE>


(c)  None.

Item 30.  Location of Accounts and Records

        The books and other documents required by paragraphs (b)(4), (c) and (d)
of Rule 31a-1 under the  Investment  Company Act of 1940 are  maintained  in the
physical possession of Mitchell Hutchins, 1285 Avenue of the Americas, New York,
New York 10019. All other accounts,  books and documents  required by Rule 31a-1
are  maintained in the physical  possession of  Registrant's  transfer agent and
custodian.


Item 31.  Management Services

        Not applicable.

Item 32.  Undertakings

        Registrant hereby undertakes to furnish each person to whom a prospectus
is  delivered  with  a  copy  of  the  Registrant's   latest  annual  report  to
shareholders upon request and without charge.

                                      C-11

<PAGE>

<PAGE>


                                          SIGNATURES

        Pursuant  to the  requirements  of the  Securities  Act of 1933  and the
Investment   Company  Act  of  1940,   the   Registrant  has  duly  caused  this
Post-Effective  Amendment  to the  Registration  Statement  to be  signed on its
behalf by the undersigned,  thereunto duly  authorized,  in the City of New York
and State of New York, on the 30th day of May, 1996.

                                    PAINEWEBBER MANAGED INVESTMENTS TRUST


                           By: /s/ Dianne E. O'Donnell
                                   Dianne E. O'Donnell
                                   Vice President and Secretary

        Pursuant  to the  requirements  of the  Securities  Act  of  1933,  this
Post-Effective  Amendment has been signed below by the following  persons in the
capacities and on the dates indicated:


<TABLE>
<CAPTION>
Signature                                   Title                                 Date

<S>                                         <C>                                   <C>
/s/ Margo N. Alexander                      President and Trustee                 May 30, 1996
- ----------------------------
Margo N. Alexander *, **                    (Chief Executive Officer)

/s/ E. Garrett Bewkes, Jr.                  Trustee and Chairman                  May 30, 1996
- ----------------------------
E. Garrett Bewkes, Jr. ***                  of the Board of Trustees

/s/ Richard Q. Armstrong                    Trustee                               May 30, 1996
- ----------------------------
Richard Q. Armstrong **

/s/ Richard R. Burt                         Trustee                               May 30, 1996
- ----------------------------
Richard Burt **

/s/ Mary C. Farrell                         Trustee                               May 30, 1996
- ----------------------------
Mary C. Farrell **

/s/ Meyer Feldberg                          Trustee                               May 30, 1996
- ----------------------------
Meyer Feldberg **

/s/ George W. Gowen                         Trustee                               May 30, 1996
- ----------------------------
George W. Gowen ***

/s/ Frederic V. Malek                       Trustee                               May 30, 1996
- ----------------------------
Frederic V. Malek **

/s/ Carl W. Schafer                         Trustee                               May 30, 1006
- ----------------------------
Carl W. Schafer **

/s/ John R. Torell III                      Trustee                               May 30, 1996
- ----------------------------
John R. Torell III **

/s/ Julian F. Sluyters                      Vice President and Treasurer (Chief   May 30, 1996
- ----------------------------
Julian F. Sluyters                          Financial and Accounting Officer)

</TABLE>



<PAGE>
<PAGE>


                             SIGNATURES (CONTINUED)
*       Signature affixed by Elinor W. Gammon pursuant to power of attorney 
        dated May 8, 1995 and incorporated by reference from Post-Effective 
        Amendment No. 34 to the registration statement of PaineWebber America 
        Fund, SEC File No. 2-78626, filed May 10, 1995.

**      Signature affixed by Elinor W. Gammon pursuant to power of attorney 
        dated April 18, 1996 and incorporated by reference from Post-Effective 
        Amendment No. 17 to the registration statement of PaineWebber Municipal
        Series, SEC File No. 33-11611, filed April 25, 1996.

***     Signature affixed by Elinor W. Gammon pursuant to power of attorney 
        dated April 18, 1996 and incorporated by reference from Post-Effective 
        Amendment No. 14 to the registration statement of PaineWebber Investment
        Trust, SEC File No. 33-39659, filed May 2, 1996.




<PAGE>
<PAGE>




                      PAINEWEBBER MANAGED INVESTMENTS TRUST

                                  EXHIBIT INDEX

<TABLE>
<S>            <C>    <C>
        (1)    (a)    Declaration of Trust1/
               (b)    Amendment to Declaration of Trust effective January 28, 1988 2/
               (c)    Amendment to Declaration of Trust effective July 1, 1990 6/
               (d)    Amendment to Declaration of Trust effective March 21, 1991 7/
               (e)    Amendment to Declaration of Trust effective April 1, 1991 8/
               (f)    Amendment to Declaration of Trust effective July 1, 1991 11/
               (g)    Amendment to Declaration of Trust effective February 26, 1992 10/
               (h)    Amendment to Declaration of Trust effective January 25, 1993 12/
               (i)    Amendment to Declaration of Trust effective May 25, 1993 14/
               (j)    Amendment to Declaration of Trust effective July 30, 1993 14/
               (k)    Amendment to Declaration of Trust effective November 13, 1993 18/
               (l)    Amendment to Declaration of Trust effective July 20, 1995 20/
               (m)    Amendments to Declaration of Trust effective October 20, 1995, November 10,
                      1995 and November 29, 1995 21/
        (2)    (a)    By-Laws1/
               (b)    Amendment to By-Laws effective March 19, 1991 7/
               (c)    Amendment to By-Laws effective September 28, 1994 18/
        (3)    Voting trust agreement - none
        (4)    Instruments defining the rights of holders of the Registrant's shares of beneficial
               interest 19/
        (5)    (a)    Investment Advisory and Administration Contract 4/
               (b)    Investment Advisory Fee Agreement with respect to PaineWebber Utility Income
                      Fund 15/
               (c)    Investment Advisory Fee Agreement with respect to PaineWebber Low Duration
                      U.S. Government Income Fund 15/
        (6)    (a)    Distribution Contract with respect to Class A Shares 15/
               (b)    Distribution Contract with respect to Class B Shares 15/
               (c)    Distribution Contract with respect to Class C Shares 21/
               (d)    Distribution Contract with respect to Class Y Shares 21/
               (e)    Exclusive Dealer Agreement with respect to Class A Shares 15/
               (f)    Exclusive Dealer Agreement with respect to Class B Shares 15/
               (g)    Exclusive Dealer Agreement with respect to Class C Shares 21/
               (h)    Exclusive Dealer Agreement with respect to Class Y Shares 21/
        (7)  Bonus,  profit  sharing  or  pension  plans  - none  
        (8)  Custodian Agreement 2/
        (9)    (a)    Transfer Agency and Service Contract 6/
               (b)    Service Contract 5/
        (10)   (a)    Opinion and consent of Kirkpatrick & Lockhart LLP , counsel to the Registrant,
                      with respect to Class A and Class B shares of U.S. Government Income Fund,
                      Investment Grade Income Fund, and High Income Fund 8/
               (b)    Opinion  and  consent  of  Kirkpatrick  &  Lockhart  LLP ,
                      counsel  to the  Registrant,  with  respect to Class A and
                      Class B shares of PaineWebber Utility Income Fund 9/
               (c)    Opinion and consent of Kirkpatrick & Lockhart LLP, counsel
                      to the  Registrant,  with respect to Class C Shares of the
                      above-referenced Funds 11/
               (d)    Opinion and consent of Kirkpatrick & Lockhart LLP, counsel to the Registrant,
                      with respect to PaineWebber Low Duration U.S. Government Income Fund 12/
               (e)    Opinion and Consent of Kirkpatrick & Lockhart LLP,
                      counsel to the Registrant, with respect to Class Y shares
                      of PaineWebber Low Duration U.S. Government Income Fund 20/

</TABLE>


<PAGE>
<PAGE>
<TABLE>

<S>           <C>
        (f)   Opinion and Consent of Kirkpatrick & Lockhart LLP, counsel to the
              Registrant,  with  respect  to  Class  Y  shares  of  PaineWebber
              Investment  Grade  Income Fund and  PaineWebber  High Income Fund
              (filed herewith)

        (11)  Auditor's  Consent  (filed  herewith)
        (12)  Financial  statements omitted from  prospectus - none
        (13)  Letter of investment  intent 3/
        (14)  Prototype  Retirement  Plan 10/
        (15)  (a) Plan pursuant to Rule 12b-1 with respect to Class A Shares 9/
              (b) Plan  pursuant to Rule 12b-1 with respect to Class B Shares 9/
              (c) Plan pursuant to Rule 12b-1 with respect to Class C Shares 12/
              (d)  Distribution  Fee Addendum with respect to Class C shares of
              PaineWebber Low
              Duration U.S. Government Income Fund 15/
        (16)   Schedule for Computation of Performance Quotations 8/
               (a)    Schedule for Computation of Performance Quotations for Class A shares of U.S.
                      Government Income Fund,   Investment Grade Income Fund, and High Income Fund 7/
               (b)    Schedule for Computation of Performance Quotations for Class B shares of U.S.
                      Government Income Fund, Investment Grade Income Fund, and High Income Fund 10/
               (c)    Schedule for Computation of Performance Quotations for Class Y shares of U.S.
                      Government Income Fund 10/
               (d)    Schedule for Computation of Performance Quotations For Class C shares of U.S.
                      Government Income Fund, Investment Grade Income Fund, and High Income Fund 13/
               (e)    Schedule for  Computation  of  Performance  Quotations for
                      Class A, Class B and Class C shares of PaineWebber Utility
                      Income Fund 16/
               (f)    Schedule for Computation of Performance Quotations for Class A, Class B, and
                      Class C shares of PaineWebber Low Duration U.S. Government Income Fund 16/
        (17) and
        (27)  Financial  Data  Schedule  (filed  herewith)
        (18)  Plan pursuant to Rule 18f-3 (filed herewith) 22/


1/      Incorporated by reference from Post-Effective Amendment No. 5 to the registration statement,
        SEC File No. 2-91362, filed January 30, 1987.

2/      Incorporated by reference from Post-Effective Amendment No. 8 to the registration statement,
        SEC File No. 2-91362, filed March 31, 1988.

3/      Incorporated by reference from Pre-Effective Amendment No. 1 to the registration statement,
        SEC File No. 2-91362, filed July 18, 1984.

4/      Incorporated by reference from Post-Effective Amendment No. 10 to the registration
        statement, SEC File No. 2-91362, filed March 6, 1989.

5/      Incorporated by reference from Post-Effective Amendment No. 12 to the registration
        statement, SEC File No. 2-91362, filed January 31, 1990.

6/      Incorporated by reference from Post-Effective Amendment No. 15 to the registration
        statement, SEC File No. 2-91362, filed January 31, 1991.

7/      Incorporated by reference from Post-Effective Amendment No. 16 to the registration
        statement, SEC File No. 2-91362, filed March 28, 1991.

8/      Incorporated by reference from Post-Effective Amendment No. 18 to the registration
        statement, SEC File No. 2-91362, filed May 2, 1991.


<PAGE>
<PAGE>

<S>     <C>
9/      Incorporated by reference from Post-Effective Amendment No. 19 to the registration
        statement, SEC File No. 2-91362, filed March 2, 1992.

10/     Incorporated by reference from Post-Effective Amendment No. 20 to the registration
        statement, SEC File No. 2-91362, filed April 1, 1992.

11/     Incorporated by reference from Post-Effective Amendment No. 21 to the registration
        statement, SEC File No. 2-91362, filed May 1, 1992.

12/     Incorporated by reference from Post-Effective Amendment No. 23 to the registration
        statement, SEC File No. 2-91362, filed January 26, 1993.

13/     Incorporated by reference from Post-Effective Amendment No. 24 to the registration
        statement, SEC File No. 2-91362, filed April 1, 1993.

14/     Incorporated by reference from Post-Effective Amendment No. 25 to the registration
        statement, SEC File No. 2-91362, filed August 10, 1993.

15/     Incorporated by reference from Post-Effective Amendment No. 26 to the registration
        statement, SEC File No. 2-91362, filed October 4, 1993.

16/     Incorporated by reference from Post-Effective Amendment No. 28 to the registration
        statement, SEC File No. 2-91362, filed April 1, 1994.

17/     Incorporated by reference from Post-Effective Amendment No. 30 to the registration
        statement, SEC File No. 2-91362, filed July 1, 1994.

</TABLE>


<PAGE>

<TABLE> 
<S>     <C>
18/     Incorporated by reference form Post-Effective Amendment No. 34 to the 
        registration statement, SEC File No. 2-91362, filed January 27, 1995.

19/     Incorporated  by reference  from  Articles  III,  VIII,  IX, X and XI of
        Registrant's  Declaration  of Trust,  as amended  effective  January 28,
        1988,  July 1,  1990,  March 21,  1991,  April 1,  1991,  July 1,  1991,
        February 26, 1992,  January 25, 1993, July 30, 1993,  November 13, 1993,
        July 20, 1995, October 20, 1995, November 10, 1995 and November 29, 1995
        and from  Articles  II, VII and X of  Registrant's  By-Laws,  as amended
        March 19, 1993 and September 28, 1994.

20/     Incorporated by reference from Post-Effective Amendment No. 38 to the 
        registration statement, SEC File No. 2-91362, filed September 5, 1995.

21/     Incorporated by reference from Post-Effective Amendment No. 39 to the 
        registration statement, SEC File No. 2-91362, filed February 14, 1996.

22/     Incorporated by reference from Post-Effective Amendment No. 40 to the registration
        statement, SEC File No. 2-91362, filed March 29, 1996.

</TABLE>


 
                                  STATEMENT OF DIFFERENCES
The copyright symbol shall be expressed as.................................. 'c'
The dagger symbol shall be expressed as..................................... 'D'
The mathermatical powers normally expressed as superscript shall
  be expressed as................. 'pp'

<PAGE>



<PAGE>

                                                         EXHIBIT 10(f)


                           KIRKPATRICK & LOCKHART LLP
                         1800 Massachusetts Avenue, N.W.
                                    2nd Floor
                           Washington, D.C. 20036-1800




                                  June 3, 1996



PaineWebber Managed Investments Trust
1285 Avenue of the Americas
New York, New York 10019

Dear Sir/Madam:

        PaineWebber  Managed  Investments  Trust ("Trust") is an  unincorporated
voluntary   association   organized  under  the  laws  of  the  Commonwealth  of
Massachusetts  on November 21, 1986.  You have  requested our opinion  regarding
certain  matters in  connection  with the issuance by the Trust of an indefinite
number  of  Class  Y  shares  of  beneficial  interest  ("Class  Y  Shares")  of
PaineWebber  Investment  Grade Income Fund and PaineWebber High Income Fund, two
of the five series of the Trust.

        We have, as counsel,  participated in various business and other matters
related to the Trust.  We have examined  copies,  either  certified or otherwise
proved to be genuine,  of the Declaration of Trust and By-Laws of the Trust, the
minutes of the  meetings of the  trustees  and other  documents  relating to the
organization  and operation of the Trust, and we generally are familiar with its
business affairs.  Based on the foregoing,  it is our opinion that the unlimited
number of unissued  Class Y Shares of PaineWebber  Investment  Grade Income Fund
and PaineWebber High Income Fund, which are currently being registered under the
Securities  Act of 1933,  as amended  ("1933  Act"),  may be legally and validly
issued from time to time in accordance with the Trust's Declaration of Trust and
By-Laws and, subject to compliance with the 1933 Act, the Investment Company Act
of 1940,  as amended,  and various state laws  regulating  the offer and sale of
securities;  and when so issued,  the Class Y Shares of  PaineWebber  Investment
Grade Income Fund and PaineWebber High Income Fund will be legally issued, fully
paid and nonassessable by the Trust.




<PAGE>
<PAGE>




PaineWebber Managed Investments Trust
June 3, 1996
Page 2


        The Trust is an entity of the type  commonly  known as a  "Massachusetts
business trust." Under  Massachusetts  law,  shareholders  could,  under certain
circumstances,  be held personally  liable for the obligations of the trust. The
Declaration  of Trust states that creditors of,  contractors  with and claimants
against  the Trust or any  series  thereof  shall look only to the assets of the
Trust or the  appropriate  series for payment.  It also  requires that notice of
such disclaimer be given in each note, bond, contact,  certificate,  undertaking
or instrument  made or issued by the officers or trustees of the Trust on behalf
of the Trust. The Declaration of Trust further provides (i) for  indemnification
from the  assets  of the  appropriate  series  for all loss and  expense  of any
shareholder  held  personally  liable  for the  obligations  of the Trust or any
series  by  virtue  of  ownership  of  shares  of such  series  and (ii) for the
appropriate  series to assume the defense of any claim  against the  shareholder
for any  act or  obligation  of the  series.  Thus,  the  risk of a  shareholder
incurring  financial  loss on account  of  shareholder  liability  is limited to
circumstances  in  which  the  Trust  or  series  would  be  unable  to meet its
obligations.

        We hereby  consent to the  filing of this  opinion  in  connection  with
Post-Effective  Amendment No. 42 to the Trust's  Registration  Statement on Form
N-1A (SEC File Nos.  2-91362 and 811-4040) to be filed with the  Securities  and
Exchange  Commission.  We also  consent to the  reference  to our firm under the
caption  "Counsel" in the Statement of Additional  Information  filed as part of
the Registration Statement.

                                                   Very truly yours,

                                                   KIRKPATRICK & LOCKHART LLP

                                                   /s/ Elinor W. Gammon

                                                   By:
                                                        Elinor W. Gammon


<PAGE>



<PAGE>

                                                                      EXHIBIT 11

                          CONSENT OF INDEPENDENT AUDITORS

We  consent  to  the  reference  to  our  firm  under  the  captions  "Financial
Highlights"  in  the  Prospectus  and "Independent Auditors" in the Statement of
Additional Information and to the incorporation by reference of our report dated
January  25,  1996  for  PaineWebber  U.S.  Government  Income Fund, PaineWebber
Investment  Grade  Income  Fund and  PaineWebber High Income Fund and our report
dated January 20, 1996 for PaineWebber Low Duration U.S. Government Income Fund,
in  this  Registration  Statement (Form N-1A No. 2-91362) of PaineWebber Managed
Investments Trust.

                                            /s/ ERNST & YOUNG LLP
                                                ERNST & YOUNG LLP

New York, New York
May 29, 1996



<PAGE>



<TABLE> <S> <C>

<ARTICLE> 6
<SERIES>
<NUMBER> 101
<NAME> PAINEWEBBER US GOVERNMENT INCOME FUND CLASS A
<MULTIPLIER> 1000
       
<S>                             <C>
<PERIOD-TYPE>                   12-MOS
<FISCAL-YEAR-END>                          NOV-30-1995
<PERIOD-START>                             DEC-01-1994
<PERIOD-END>                               NOV-30-1995
<INVESTMENTS-AT-COST>                          412,760
<INVESTMENTS-AT-VALUE>                         42,6717
<RECEIVABLES>                                    6,570
<ASSETS-OTHER>                                     224
<OTHER-ITEMS-ASSETS>                                 0
<TOTAL-ASSETS>                                 433,511
<PAYABLE-FOR-SECURITIES>                            60
<SENIOR-LONG-TERM-DEBT>                              0
<OTHER-ITEMS-LIABILITIES>                        3,166
<TOTAL-LIABILITIES>                              3,226
<SENIOR-EQUITY>                                      0
<PAID-IN-CAPITAL-COMMON>                       626,565
<SHARES-COMMON-STOCK>                           47,185
<SHARES-COMMON-PRIOR>                           50,464
<ACCUMULATED-NII-CURRENT>                            0
<OVERDISTRIBUTION-NII>                          (1,104)
<ACCUMULATED-NET-GAINS>                       (209,160)
<OVERDISTRIBUTION-GAINS>                             0
<ACCUM-APPREC-OR-DEPREC>                        13,984
<NET-ASSETS>                                   430,285
<DIVIDEND-INCOME>                                    0
<INTEREST-INCOME>                               31,028
<OTHER-INCOME>                                       0
<EXPENSES-NET>                                  (4,173)
<NET-INVESTMENT-INCOME>                         26,855
<REALIZED-GAINS-CURRENT>                          (923)
<APPREC-INCREASE-CURRENT>                       30,439
<NET-CHANGE-FROM-OPS>                           56,371
<EQUALIZATION>                                       0
<DISTRIBUTIONS-OF-INCOME>                      (26,986)
<DISTRIBUTIONS-OF-GAINS>                             0
<DISTRIBUTIONS-OTHER>                                0
<NUMBER-OF-SHARES-SOLD>                          6,478
<NUMBER-OF-SHARES-REDEEMED>                    (11,424)
<SHARES-REINVESTED>                              1,554
<NET-CHANGE-IN-ASSETS>                          (3,392)
<ACCUMULATED-NII-PRIOR>                              0
<ACCUMULATED-GAINS-PRIOR>                            0
<OVERDISTRIB-NII-PRIOR>                         (1,372)
<OVERDIST-NET-GAINS-PRIOR>                           0
<GROSS-ADVISORY-FEES>                            2,020
<INTEREST-EXPENSE>                                   0
<GROSS-EXPENSE>                                  4,173
<AVERAGE-NET-ASSETS>                           404,115
<PER-SHARE-NAV-BEGIN>                             8.50
<PER-SHARE-NII>                                   0.58
<PER-SHARE-GAIN-APPREC>                           0.62
<PER-SHARE-DIVIDEND>                            (0.58)
<PER-SHARE-DISTRIBUTIONS>                            0
<RETURNS-OF-CAPITAL>                                 0
<PER-SHARE-NAV-END>                               9.12
<EXPENSE-RATIO>                                   1.03
<AVG-DEBT-OUTSTANDING>                               0
<AVG-DEBT-PER-SHARE>                                 0
        


<PAGE>



<TABLE> <S> <C>

<ARTICLE> 6
<SERIES>
<NUMBER> 102
<NAME> PAINEWEBBER US GOVERNMENT INCOME FUND CLASS B
<MULTIPLIER> 1000
       
<S>                             <C>
<PERIOD-TYPE>                   12-MOS
<FISCAL-YEAR-END>                          NOV-30-1995
<PERIOD-START>                             DEC-01-1994
<PERIOD-END>                               NOV-30-1995
<INVESTMENTS-AT-COST>                           79,110
<INVESTMENTS-AT-VALUE>                          81,785
<RECEIVABLES>                                    1,259
<ASSETS-OTHER>                                      43
<OTHER-ITEMS-ASSETS>                                 0
<TOTAL-ASSETS>                                  83,087
<PAYABLE-FOR-SECURITIES>                            12
<SENIOR-LONG-TERM-DEBT>                              0
<OTHER-ITEMS-LIABILITIES>                          607
<TOTAL-LIABILITIES>                                619
<SENIOR-EQUITY>                                      0
<PAID-IN-CAPITAL-COMMON>                       120,088
<SHARES-COMMON-STOCK>                            9,043
<SHARES-COMMON-PRIOR>                           11,720
<ACCUMULATED-NII-CURRENT>                            0
<OVERDISTRIBUTION-NII>                            (212)
<ACCUMULATED-NET-GAINS>                        (40,088)
<OVERDISTRIBUTION-GAINS>                             0
<ACCUM-APPREC-OR-DEPREC>                         2,680
<NET-ASSETS>                                    82,468
<DIVIDEND-INCOME>                                    0
<INTEREST-INCOME>                                6,909
<OTHER-INCOME>                                       0
<EXPENSES-NET>                                  (1,628)
<NET-INVESTMENT-INCOME>                          5,281
<REALIZED-GAINS-CURRENT>                         (177)
<APPREC-INCREASE-CURRENT>                         5834
<NET-CHANGE-FROM-OPS>                           10,938
<EQUALIZATION>                                       0
<DISTRIBUTIONS-OF-INCOME>                       (5,310)
<DISTRIBUTIONS-OF-GAINS>                             0
<DISTRIBUTIONS-OTHER>                                0
<NUMBER-OF-SHARES-SOLD>                          1,041
<NUMBER-OF-SHARES-REDEEMED>                     (3,972)
<SHARES-REINVESTED>                                366
<NET-CHANGE-IN-ASSETS>                          (2,565)
<ACCUMULATED-NII-PRIOR>                              0
<ACCUMULATED-GAINS-PRIOR>                            0
<OVERDISTRIB-NII-PRIOR>                          (320)
<OVERDIST-NET-GAINS-PRIOR>                           0
<GROSS-ADVISORY-FEES>                              449
<INTEREST-EXPENSE>                                   0
<GROSS-EXPENSE>                                  1,628
<AVERAGE-NET-ASSETS>                            89,779
<PER-SHARE-NAV-BEGIN>                             8.50
<PER-SHARE-NII>                                   0.51
<PER-SHARE-GAIN-APPREC>                           0.63
<PER-SHARE-DIVIDEND>                             (0.52)
<PER-SHARE-DISTRIBUTIONS>                            0
<RETURNS-OF-CAPITAL>                                 0
<PER-SHARE-NAV-END>                               9.12
<EXPENSE-RATIO>                                   1.81
<AVG-DEBT-OUTSTANDING>                               0
<AVG-DEBT-PER-SHARE>                                 0
        


<PAGE>




<TABLE> <S> <C>

<ARTICLE> 6
<SERIES>
<NUMBER> 103
<NAME> PAINEWEBBER US GOVERNMENT INCOME FUND CLASS C
<MULTIPLIER> 1000
       
<S>                             <C>
<PERIOD-TYPE>                   12-MOS
<FISCAL-YEAR-END>                          NOV-30-1995
<PERIOD-START>                             DEC-01-1995
<PERIOD-END>                               NOV-30-1995
<INVESTMENTS-AT-COST>                           51,639
<INVESTMENTS-AT-VALUE>                          53,385
<RECEIVABLES>                                      822
<ASSETS-OTHER>                                      28
<OTHER-ITEMS-ASSETS>                                 0
<TOTAL-ASSETS>                                  54,235
<PAYABLE-FOR-SECURITIES>                             8
<SENIOR-LONG-TERM-DEBT>                              0
<OTHER-ITEMS-LIABILITIES>                          396
<TOTAL-LIABILITIES>                                404
<SENIOR-EQUITY>                                      0
<PAID-IN-CAPITAL-COMMON>                        78,387
<SHARES-COMMON-STOCK>                            5,909
<SHARES-COMMON-PRIOR>                            8,059
<ACCUMULATED-NII-CURRENT>                            0
<OVERDISTRIBUTION-NII>                            (138)
<ACCUMULATED-NET-GAINS>                        (26,167)
<OVERDISTRIBUTION-GAINS>                             0
<ACCUM-APPREC-OR-DEPREC>                         1,750
<NET-ASSETS>                                    53,831
<DIVIDEND-INCOME>                                    0
<INTEREST-INCOME>                                4,471
<OTHER-INCOME>                                       0
<EXPENSES-NET>                                    (898)
<NET-INVESTMENT-INCOME>                           3573
<REALIZED-GAINS-CURRENT>                          (115)
<APPREC-INCREASE-CURRENT>                        3,808
<NET-CHANGE-FROM-OPS>                            7,266
<EQUALIZATION>                                       0
<DISTRIBUTIONS-OF-INCOME>                       (3,591)
<DISTRIBUTIONS-OF-GAINS>                             0
<DISTRIBUTIONS-OTHER>                                0
<NUMBER-OF-SHARES-SOLD>                            965
<NUMBER-OF-SHARES-REDEEMED>                     (3,398)
<SHARES-REINVESTED>                                283
<NET-CHANGE-IN-ASSETS>                          (2,150)
<ACCUMULATED-NII-PRIOR>                              0
<ACCUMULATED-GAINS-PRIOR>                            0
<OVERDISTRIB-NII-PRIOR>                          (221)
<OVERDIST-NET-GAINS-PRIOR>                           0
<GROSS-ADVISORY-FEES>                              290
<INTEREST-EXPENSE>                                   0
<GROSS-EXPENSE>                                    898
<AVERAGE-NET-ASSETS>                            57,882
<PER-SHARE-NAV-BEGIN>                             8.49
<PER-SHARE-NII>                                   0.53
<PER-SHARE-GAIN-APPREC>                           0.63
<PER-SHARE-DIVIDEND>                             (0.54)
<PER-SHARE-DISTRIBUTIONS>                            0
<RETURNS-OF-CAPITAL>                                 0
<PER-SHARE-NAV-END>                               9.11
<EXPENSE-RATIO>                                   0.55
<AVG-DEBT-OUTSTANDING>                               0
<AVG-DEBT-PER-SHARE>                                 0
        


<PAGE>



<TABLE> <S> <C>

<ARTICLE> 6
<SERIES>
<NUMBER> 104
<NAME> PAINEWEBBER US GOVERNMENT INCOME FUND CLASS Y
<MULTIPLIER> 1000
       
<S>                             <C>
<PERIOD-TYPE>                   12-MOS
<FISCAL-YEAR-END>                          NOV-30-1995
<PERIOD-START>                             DEC-01-1994
<PERIOD-END>                               NOV-30-1995
<INVESTMENTS-AT-COST>                            7,633
<INVESTMENTS-AT-VALUE>                           7,891
<RECEIVABLES>                                      121
<ASSETS-OTHER>                                       4
<OTHER-ITEMS-ASSETS>                                 0
<TOTAL-ASSETS>                                   8,016
<PAYABLE-FOR-SECURITIES>                             1
<SENIOR-LONG-TERM-DEBT>                              0
<OTHER-ITEMS-LIABILITIES>                           59
<TOTAL-LIABILITIES>                                 60
<SENIOR-EQUITY>                                      0
<PAID-IN-CAPITAL-COMMON>                        11,587
<SHARES-COMMON-STOCK>                              873
<SHARES-COMMON-PRIOR>                              583
<ACCUMULATED-NII-CURRENT>                            0
<OVERDISTRIBUTION-NII>                             (20)
<ACCUMULATED-NET-GAINS>                         (3,868)
<OVERDISTRIBUTION-GAINS>                             0
<ACCUM-APPREC-OR-DEPREC>                           259
<NET-ASSETS>                                     7,956
<DIVIDEND-INCOME>                                    0
<INTEREST-INCOME>                                  392
<OTHER-INCOME>                                       0
<EXPENSES-NET>                                     (36)
<NET-INVESTMENT-INCOME>                            356
<REALIZED-GAINS-CURRENT>                           (17)
<APPREC-INCREASE-CURRENT>                          563
<NET-CHANGE-FROM-OPS>                              902
<EQUALIZATION>                                       0
<DISTRIBUTIONS-OF-INCOME>                         (357)
<DISTRIBUTIONS-OF-GAINS>                             0
<DISTRIBUTIONS-OTHER>                                0
<NUMBER-OF-SHARES-SOLD>                          5,537
<NUMBER-OF-SHARES-REDEEMED>                     (3,301)
<SHARES-REINVESTED>                                350
<NET-CHANGE-IN-ASSETS>                           2,586
<ACCUMULATED-NII-PRIOR>                              0
<ACCUMULATED-GAINS-PRIOR>                            0
<OVERDISTRIB-NII-PRIOR>                            (16)
<OVERDIST-NET-GAINS-PRIOR>                           0
<GROSS-ADVISORY-FEES>                               26
<INTEREST-EXPENSE>                                   0
<GROSS-EXPENSE>                                     36
<AVERAGE-NET-ASSETS>                             5,112
<PER-SHARE-NAV-BEGIN>                             8.49
<PER-SHARE-NII>                                   0.61
<PER-SHARE-GAIN-APPREC>                           0.62
<PER-SHARE-DIVIDEND>                             (0.61)
<PER-SHARE-DISTRIBUTIONS>                            0
<RETURNS-OF-CAPITAL>                                 0
<PER-SHARE-NAV-END>                               9.11
<EXPENSE-RATIO>                                   0.71
<AVG-DEBT-OUTSTANDING>                               0
<AVG-DEBT-PER-SHARE>                                 0
        


<PAGE>




<TABLE> <S> <C>

<ARTICLE> 6
<SERIES>
<NUMBER> 181
<NAME> PAINEWEBBER LOW DURATION US GOV'T INCOME FUND CLASS A
<MULTIPLIER> 1000
       
<S>                             <C>
<PERIOD-TYPE>                   12-MOS
<FISCAL-YEAR-END>                          NOV-30-1995
<PERIOD-START>                             DEC-01-1994
<PERIOD-END>                               NOV-30-1995
<INVESTMENTS-AT-COST>                          159,996
<INVESTMENTS-AT-VALUE>                         161,374
<RECEIVABLES>                                   94,358
<ASSETS-OTHER>                                     100
<OTHER-ITEMS-ASSETS>                                 0
<TOTAL-ASSETS>                                 255,832
<PAYABLE-FOR-SECURITIES>                       126,830
<SENIOR-LONG-TERM-DEBT>                              0
<OTHER-ITEMS-LIABILITIES>                        1,041
<TOTAL-LIABILITIES>                            127,871
<SENIOR-EQUITY>                                      0
<PAID-IN-CAPITAL-COMMON>                       175,699
<SHARES-COMMON-STOCK>                           54,666
<SHARES-COMMON-PRIOR>                          222,718
<ACCUMULATED-NII-CURRENT>                            0
<OVERDISTRIBUTION-NII>                            (297)
<ACCUMULATED-NET-GAINS>                        (48,819)
<OVERDISTRIBUTION-GAINS>                             0
<ACCUM-APPREC-OR-DEPREC>                         1,378
<NET-ASSETS>                                   127,961
<DIVIDEND-INCOME>                                    0
<INTEREST-INCOME>                               10,379
<OTHER-INCOME>                                       0
<EXPENSES-NET>                                  (1,754)
<NET-INVESTMENT-INCOME>                          8,625
<REALIZED-GAINS-CURRENT>                           978
<APPREC-INCREASE-CURRENT>                        4,703
<NET-CHANGE-FROM-OPS>                            5,681
<EQUALIZATION>                                       0
<DISTRIBUTIONS-OF-INCOME>                       (7,944)
<DISTRIBUTIONS-OF-GAINS>                             0
<DISTRIBUTIONS-OTHER>                                0
<NUMBER-OF-SHARES-SOLD>                         12,586
<NUMBER-OF-SHARES-REDEEMED>                    (29,452)
<SHARES-REINVESTED>                              1,076
<NET-CHANGE-IN-ASSETS>                         (29,640)
<ACCUMULATED-NII-PRIOR>                              0
<ACCUMULATED-GAINS-PRIOR>                            0
<OVERDISTRIB-NII-PRIOR>                              0
<OVERDIST-NET-GAINS-PRIOR>                      (5,581)
<GROSS-ADVISORY-FEES>                              741
<INTEREST-EXPENSE>                                   0
<GROSS-EXPENSE>                                  1,754
<AVERAGE-NET-ASSETS>                           134,644
<PER-SHARE-NAV-BEGIN>                             2.25
<PER-SHARE-NII>                                   0.13
<PER-SHARE-GAIN-APPREC>                           0.09
<PER-SHARE-DIVIDEND>                             (0.13)
<PER-SHARE-DISTRIBUTIONS>                            0
<RETURNS-OF-CAPITAL>                                 0
<PER-SHARE-NAV-END>                               2.34
<EXPENSE-RATIO>                                   1.15
<AVG-DEBT-OUTSTANDING>                               0
<AVG-DEBT-PER-SHARE>                                 0
        

<PAGE>



<TABLE> <S> <C>

<ARTICLE> 6
<SERIES>
<NUMBER> 182
<NAME> PAINEWEBBER LOW DURATION US GOV'T INCOME FUND CLASS B
<MULTIPLIER> 1000
       
<S>                             <C>
<PERIOD-TYPE>                   12-MOS
<FISCAL-YEAR-END>                          NOV-30-1995
<PERIOD-START>                             DEC-01-1994
<PERIOD-END>                               NOV-30-1995
<INVESTMENTS-AT-COST>                           11,437
<INVESTMENTS-AT-VALUE>                          11,536
<RECEIVABLES>                                    6,745
<ASSETS-OTHER>                                       7
<OTHER-ITEMS-ASSETS>                                 0
<TOTAL-ASSETS>                                  18,288
<PAYABLE-FOR-SECURITIES>                         9,066
<SENIOR-LONG-TERM-DEBT>                              0
<OTHER-ITEMS-LIABILITIES>                           75
<TOTAL-LIABILITIES>                              9,141
<SENIOR-EQUITY>                                      0
<PAID-IN-CAPITAL-COMMON>                        12,560
<SHARES-COMMON-STOCK>                            3,908
<SHARES-COMMON-PRIOR>                           12,808
<ACCUMULATED-NII-CURRENT>                            0
<OVERDISTRIBUTION-NII>                             (21)
<ACCUMULATED-NET-GAINS>                         (3,490)
<OVERDISTRIBUTION-GAINS>                             0
<ACCUM-APPREC-OR-DEPREC>                            98
<NET-ASSETS>                                     9,147
<DIVIDEND-INCOME>                                  742
<INTEREST-INCOME>                                    0
<OTHER-INCOME>                                       0
<EXPENSES-NET>                                    (208)
<NET-INVESTMENT-INCOME>                            534
<REALIZED-GAINS-CURRENT>                            70
<APPREC-INCREASE-CURRENT>                          336
<NET-CHANGE-FROM-OPS>                              940
<EQUALIZATION>                                       0
<DISTRIBUTIONS-OF-INCOME>                         (531)
<DISTRIBUTIONS-OF-GAINS>                             0
<DISTRIBUTIONS-OTHER>                                0
<NUMBER-OF-SHARES-SOLD>                            917
<NUMBER-OF-SHARES-REDEEMED>                     (3,100)
<SHARES-REINVESTED>                                150
<NET-CHANGE-IN-ASSETS>                          (4,225)
<ACCUMULATED-NII-PRIOR>                              0
<ACCUMULATED-GAINS-PRIOR>                            0
<OVERDISTRIB-NII-PRIOR>                              0
<OVERDIST-NET-GAINS-PRIOR>                        (321)
<GROSS-ADVISORY-FEES>                               53
<INTEREST-EXPENSE>                                   0
<GROSS-EXPENSE>                                    208
<AVERAGE-NET-ASSETS>                            10,572
<PER-SHARE-NAV-BEGIN>                             2.25
<PER-SHARE-NII>                                   0.11
<PER-SHARE-GAIN-APPREC>                           0.09
<PER-SHARE-DIVIDEND>                             (0.11)
<PER-SHARE-DISTRIBUTIONS>                            0
<RETURNS-OF-CAPITAL>                                 0
<PER-SHARE-NAV-END>                               2.34
<EXPENSE-RATIO>                                   2.02
<AVG-DEBT-OUTSTANDING>                               0
<AVG-DEBT-PER-SHARE>                                 0
        


<PAGE>



<TABLE> <S> <C>

<ARTICLE> 6
<SERIES>
<NUMBER> 183
<NAME> PAINEWEBBER LOW DURATION US GOV'T INCOME FUND CLASS C
<MULTIPLIER> 1000
       
<S>                             <C>
<PERIOD-TYPE>                   12-MOS
<FISCAL-YEAR-END>                          NOV-30-1995
<PERIOD-START>                             DEC-01-1994
<PERIOD-END>                               NOV-30-1995
<INVESTMENTS-AT-COST>                          225,273
<INVESTMENTS-AT-VALUE>                         227,213
<RECEIVABLES>                                  132,856
<ASSETS-OTHER>                                     140
<OTHER-ITEMS-ASSETS>                                 0
<TOTAL-ASSETS>                                 360,209
<PAYABLE-FOR-SECURITIES>                       178,576
<SENIOR-LONG-TERM-DEBT>                          1,465
<OTHER-ITEMS-LIABILITIES>                            0
<TOTAL-LIABILITIES>                            180,041
<SENIOR-EQUITY>                                      0
<PAID-IN-CAPITAL-COMMON>                       247,383
<SHARES-COMMON-STOCK>                           77,008
<SHARES-COMMON-PRIOR>                          497,587
<ACCUMULATED-NII-CURRENT>                            0
<OVERDISTRIBUTION-NII>                            (418)
<ACCUMULATED-NET-GAINS>                        (68,737)
<OVERDISTRIBUTION-GAINS>                             0
<ACCUM-APPREC-OR-DEPREC>                         1,940
<NET-ASSETS>                                   180,168
<DIVIDEND-INCOME>                                    0
<INTEREST-INCOME>                               14,614
<OTHER-INCOME>                                       0
<EXPENSES-NET>                                  (3,640)
<NET-INVESTMENT-INCOME>                         10,974
<REALIZED-GAINS-CURRENT>                         1,376
<APPREC-INCREASE-CURRENT>                        6,622
<NET-CHANGE-FROM-OPS>                           18,972
<EQUALIZATION>                                       0
<DISTRIBUTIONS-OF-INCOME>                      (11,679)
<DISTRIBUTIONS-OF-GAINS>                             0
<DISTRIBUTIONS-OTHER>                                0
<NUMBER-OF-SHARES-SOLD>                          5,571
<NUMBER-OF-SHARES-REDEEMED>                    (63,802)
<SHARES-REINVESTED>                              3,681
<NET-CHANGE-IN-ASSETS>                        (117,166)
<ACCUMULATED-NII-PRIOR>                              0
<ACCUMULATED-GAINS-PRIOR>                            0
<OVERDISTRIB-NII-PRIOR>                              0
<OVERDIST-NET-GAINS-PRIOR>                     (12,010)
<GROSS-ADVISORY-FEES>                            1,044
<INTEREST-EXPENSE>                                   0
<GROSS-EXPENSE>                                  3,640
<AVERAGE-NET-ASSETS>                           219,808
<PER-SHARE-NAV-BEGIN>                             2.25
<PER-SHARE-NII>                                   0.12
<PER-SHARE-GAIN-APPREC>                           0.09
<PER-SHARE-DIVIDEND>                             (0.12)
<PER-SHARE-DISTRIBUTIONS>                            0
<RETURNS-OF-CAPITAL>                                 0
<PER-SHARE-NAV-END>                               2.34
<EXPENSE-RATIO>                                   1.75
<AVG-DEBT-OUTSTANDING>                               0
<AVG-DEBT-PER-SHARE>                                 0
        


<PAGE>




<TABLE> <S> <C>

<ARTICLE> 6
<SERIES>
<NUMBER> 184
<NAME> PAINEWEBBER LOW DURATION US GOV'T INCOME FUND CLASS Y
<MULTIPLIER> 1000
       
<S>                             <C>
<PERIOD-TYPE>                   12-MOS
<FISCAL-YEAR-END>                          NOV-30-1995
<PERIOD-START>                             DEC-01-1994
<PERIOD-END>                               NOV-30-1995
<INVESTMENTS-AT-COST>                              401
<INVESTMENTS-AT-VALUE>                             404
<RECEIVABLES>                                      237
<ASSETS-OTHER>                                       0
<OTHER-ITEMS-ASSETS>                                 0
<TOTAL-ASSETS>                                     641
<PAYABLE-FOR-SECURITIES>                           318
<SENIOR-LONG-TERM-DEBT>                              0
<OTHER-ITEMS-LIABILITIES>                            2
<TOTAL-LIABILITIES>                                320
<SENIOR-EQUITY>                                      0
<PAID-IN-CAPITAL-COMMON>                           440
<SHARES-COMMON-STOCK>                              137
<SHARES-COMMON-PRIOR>                                0
<ACCUMULATED-NII-CURRENT>                            0
<OVERDISTRIBUTION-NII>                              (1)
<ACCUMULATED-NET-GAINS>                           (122)
<OVERDISTRIBUTION-GAINS>                             0
<ACCUM-APPREC-OR-DEPREC>                             4
<NET-ASSETS>                                       321
<DIVIDEND-INCOME>                                    0
<INTEREST-INCOME>                                   26
<OTHER-INCOME>                                       0
<EXPENSES-NET>                                      (4)
<NET-INVESTMENT-INCOME>                             22
<REALIZED-GAINS-CURRENT>                             3
<APPREC-INCREASE-CURRENT>                           12
<NET-CHANGE-FROM-OPS>                               37
<EQUALIZATION>                                       0
<DISTRIBUTIONS-OF-INCOME>                           (2)
<DISTRIBUTIONS-OF-GAINS>                             0
<DISTRIBUTIONS-OTHER>                                0
<NUMBER-OF-SHARES-SOLD>                            141
<NUMBER-OF-SHARES-REDEEMED>                         (4)
<SHARES-REINVESTED>                                  1
<NET-CHANGE-IN-ASSETS>                             354
<ACCUMULATED-NII-PRIOR>                              0
<ACCUMULATED-GAINS-PRIOR>                            0
<OVERDISTRIB-NII-PRIOR>                              0
<OVERDIST-NET-GAINS-PRIOR>                           0
<GROSS-ADVISORY-FEES>                                2
<INTEREST-EXPENSE>                                   0
<GROSS-EXPENSE>                                      4
<AVERAGE-NET-ASSETS>                               319
<PER-SHARE-NAV-BEGIN>                             2.33
<PER-SHARE-NII>                                   0.01
<PER-SHARE-GAIN-APPREC>                           0.01
<PER-SHARE-DIVIDEND>                             (0.01)
<PER-SHARE-DISTRIBUTIONS>                            0
<RETURNS-OF-CAPITAL>                                 0
<PER-SHARE-NAV-END>                               2.34
<EXPENSE-RATIO>                                   0.99
<AVG-DEBT-OUTSTANDING>                               0
<AVG-DEBT-PER-SHARE>                                 0
        

<PAGE>



<TABLE> <S> <C>

<ARTICLE> 6
<SERIES>
<NUMBER> 121
<NAME> PAINEWEBBER INVESTMENT GRADE INCOME FUND CLASS A
<MULTIPLIER> 1000
       
<S>                             <C>
<PERIOD-TYPE>                   12-MOS
<FISCAL-YEAR-END>                          NOV-30-1995
<PERIOD-START>                             DEC-01-1994
<PERIOD-END>                               NOV-30-1995
<INVESTMENTS-AT-COST>                          242,660
<INVESTMENTS-AT-VALUE>                         255,302
<RECEIVABLES>                                    8,100
<ASSETS-OTHER>                                      33
<OTHER-ITEMS-ASSETS>                                 0
<TOTAL-ASSETS>                                 263,435
<PAYABLE-FOR-SECURITIES>                         2,245
<SENIOR-LONG-TERM-DEBT>                              0
<OTHER-ITEMS-LIABILITIES>                        2,293
<TOTAL-LIABILITIES>                              4,538
<SENIOR-EQUITY>                                      0
<PAID-IN-CAPITAL-COMMON>                       289,809
<SHARES-COMMON-STOCK>                           24,251
<SHARES-COMMON-PRIOR>                           28,076
<ACCUMULATED-NII-CURRENT>                            0
<OVERDISTRIBUTION-NII>                            (378)
<ACCUMULATED-NET-GAINS>                        (43,175)
<OVERDISTRIBUTION-GAINS>                             0
<ACCUM-APPREC-OR-DEPREC>                        12,642
<NET-ASSETS>                                   258,898
<DIVIDEND-INCOME>                                    0
<INTEREST-INCOME>                               22,193
<OTHER-INCOME>                                       0
<EXPENSES-NET>                                  (2,570)
<NET-INVESTMENT-INCOME>                         19,623
<REALIZED-GAINS-CURRENT>                         4,012
<APPREC-INCREASE-CURRENT>                       22,092
<NET-CHANGE-FROM-OPS>                           45,727
<EQUALIZATION>                                       0
<DISTRIBUTIONS-OF-INCOME>                       19,623
<DISTRIBUTIONS-OF-GAINS>                             0
<DISTRIBUTIONS-OTHER>                                0
<NUMBER-OF-SHARES-SOLD>                         27,730
<NUMBER-OF-SHARES-REDEEMED>                    (75,594)
<SHARES-REINVESTED>                              9,871
<NET-CHANGE-IN-ASSETS>                         (11,889)
<ACCUMULATED-NII-PRIOR>                              0
<ACCUMULATED-GAINS-PRIOR>                      (47,320)
<OVERDISTRIB-NII-PRIOR>                           (380)
<OVERDIST-NET-GAINS-PRIOR>                           0
<GROSS-ADVISORY-FEES>                            1,377
<INTEREST-EXPENSE>                                   0
<GROSS-EXPENSE>                                  2,570
<AVERAGE-NET-ASSETS>                           264,398
<PER-SHARE-NAV-BEGIN>                             9.67
<PER-SHARE-NII>                                    .76
<PER-SHARE-GAIN-APPREC>                           1.01
<PER-SHARE-DIVIDEND>                              (.76)
<PER-SHARE-DISTRIBUTIONS>                            0
<RETURNS-OF-CAPITAL>                                 0
<PER-SHARE-NAV-END>                              10.68
<EXPENSE-RATIO>                                    .95
<AVG-DEBT-OUTSTANDING>                               0
<AVG-DEBT-PER-SHARE>                                 0
        

<PAGE>



<TABLE> <S> <C>

<ARTICLE> 6
<SERIES>
<NUMBER> 122
<NAME> PAINEWEBBER INVESTMENT GRADE INCOME FUND CLASS B
<MULTIPLIER> 1000
       
<S>                             <C>
<PERIOD-TYPE>                   12-MOS
<FISCAL-YEAR-END>                          NOV-30-1995
<PERIOD-START>                             DEC-01-1994
<PERIOD-END>                               NOV-30-1995
<INVESTMENTS-AT-COST>                           66,896
<INVESTMENTS-AT-VALUE>                          70,381
<RECEIVABLES>                                    2,233
<ASSETS-OTHER>                                       9
<OTHER-ITEMS-ASSETS>                                 0
<TOTAL-ASSETS>                                  72,623
<PAYABLE-FOR-SECURITIES>                           619
<SENIOR-LONG-TERM-DEBT>                              0
<OTHER-ITEMS-LIABILITIES>                          632
<TOTAL-LIABILITIES>                              1,251
<SENIOR-EQUITY>                                      0
<PAID-IN-CAPITAL-COMMON>                        79,894
<SHARES-COMMON-STOCK>                            6,687
<SHARES-COMMON-PRIOR>                            7,173
<ACCUMULATED-NII-CURRENT>                            0
<OVERDISTRIBUTION-NII>                           (104)
<ACCUMULATED-NET-GAINS>                       (11,903)
<OVERDISTRIBUTION-GAINS>                             0
<ACCUM-APPREC-OR-DEPREC>                         3,485
<NET-ASSETS>                                    71,372
<DIVIDEND-INCOME>                                    0
<INTEREST-INCOME>                                6,118
<OTHER-INCOME>                                       0
<EXPENSES-NET>                                  (1,300)
<NET-INVESTMENT-INCOME>                          4,818
<REALIZED-GAINS-CURRENT>                         1,106
<APPREC-INCREASE-CURRENT>                        6,090
<NET-CHANGE-FROM-OPS>                           12,014
<EQUALIZATION>                                       0
<DISTRIBUTIONS-OF-INCOME>                        4,818
<DISTRIBUTIONS-OF-GAINS>                             0
<DISTRIBUTIONS-OTHER>                                0
<NUMBER-OF-SHARES-SOLD>                          7,644
<NUMBER-OF-SHARES-REDEEMED>                    (20,840)
<SHARES-REINVESTED>                              2,721
<NET-CHANGE-IN-ASSETS>                         (37,278)
<ACCUMULATED-NII-PRIOR>                              0
<ACCUMULATED-GAINS-PRIOR>                      (12,086)
<OVERDISTRIB-NII-PRIOR>                            (97)
<OVERDIST-NET-GAINS-PRIOR>                           0
<GROSS-ADVISORY-FEES>                              431
<INTEREST-EXPENSE>                                   0
<GROSS-EXPENSE>                                  1,300
<AVERAGE-NET-ASSETS>                            72,222
<PER-SHARE-NAV-BEGIN>                             9.67
<PER-SHARE-NII>                                    .68
<PER-SHARE-GAIN-APPREC>                           1.00
<PER-SHARE-DIVIDEND>                              (.68)
<PER-SHARE-DISTRIBUTIONS>                            0
<RETURNS-OF-CAPITAL>                                 0
<PER-SHARE-NAV-END>                              10.67
<EXPENSE-RATIO>                                   1.70
<AVG-DEBT-OUTSTANDING>                               0
<AVG-DEBT-PER-SHARE>                                 0
        

<PAGE>




<TABLE> <S> <C>

<ARTICLE> 6
<SERIES>
<NUMBER> 123
<NAME> PAINEWEBBER INVESTMENT GRADE INCOME FUND CLASS C
<MULTIPLIER> 1000
       
<S>                             <C>
<PERIOD-TYPE>                   12-MOS
<FISCAL-YEAR-END>                          NOV-30-1995
<PERIOD-START>                             DEC-01-1994
<PERIOD-END>                               NOV-30-1995
<INVESTMENTS-AT-COST>                           36,695
<INVESTMENTS-AT-VALUE>                          38,606
<RECEIVABLES>                                    1,225
<ASSETS-OTHER>                                       5
<OTHER-ITEMS-ASSETS>                                 0
<TOTAL-ASSETS>                                  39,836
<PAYABLE-FOR-SECURITIES>                           339
<SENIOR-LONG-TERM-DEBT>                              0
<OTHER-ITEMS-LIABILITIES>                          347
<TOTAL-LIABILITIES>                                686
<SENIOR-EQUITY>                                      0
<PAID-IN-CAPITAL-COMMON>                        43,825
<SHARES-COMMON-STOCK>                            3,667
<SHARES-COMMON-PRIOR>                            4,702
<ACCUMULATED-NII-CURRENT>                            0
<OVERDISTRIBUTION-NII>                             (57)
<ACCUMULATED-NET-GAINS>                         (6,529)
<OVERDISTRIBUTION-GAINS>                             0
<ACCUM-APPREC-OR-DEPREC>                         1,911
<NET-ASSETS>                                    39,150
<DIVIDEND-INCOME>                                    0
<INTEREST-INCOME>                                3,356
<OTHER-INCOME>                                       0
<EXPENSES-NET>                                    (473)
<NET-INVESTMENT-INCOME>                          2,883
<REALIZED-GAINS-CURRENT>                           607
<APPREC-INCREASE-CURRENT>                        3,341
<NET-CHANGE-FROM-OPS>                            6,830
<EQUALIZATION>                                       0
<DISTRIBUTIONS-OF-INCOME>                       (2,883)
<DISTRIBUTIONS-OF-GAINS>                             0
<DISTRIBUTIONS-OTHER>                                0
<NUMBER-OF-SHARES-SOLD>                         4,193
<NUMBER-OF-SHARES-REDEEMED>                    (11,431)
<SHARES-REINVESTED>                              1,493
<NET-CHANGE-IN-ASSETS>                           1,798
<ACCUMULATED-NII-PRIOR>                              0
<ACCUMULATED-GAINS-PRIOR>                       (7,924)
<OVERDISTRIB-NII-PRIOR>                            (64)
<OVERDIST-NET-GAINS-PRIOR>                           0
<GROSS-ADVISORY-FEES>                               82
<INTEREST-EXPENSE>                                   0
<GROSS-EXPENSE>                                    473
<AVERAGE-NET-ASSETS>                            41,460
<PER-SHARE-NAV-BEGIN>                             9.67
<PER-SHARE-NII>                                    .70
<PER-SHARE-GAIN-APPREC>                           1.01
<PER-SHARE-DIVIDEND>                             (.70)
<PER-SHARE-DISTRIBUTIONS>                            0
<RETURNS-OF-CAPITAL>                                 0
<PER-SHARE-NAV-END>                              10.68
<EXPENSE-RATIO>                                   1.45
<AVG-DEBT-OUTSTANDING>                               0
<AVG-DEBT-PER-SHARE>                                 0
        

<PAGE>



<TABLE> <S> <C>

<ARTICLE> 6
<SERIES>
<NUMBER> 141
<NAME> PAINEWEBBER HIGH INCOME FUND CLASS A
<MULTIPLIER> 1000
       
<S>                             <C>
<PERIOD-TYPE>                   12-MOS
<FISCAL-YEAR-END>                          NOV-30-1995
<PERIOD-START>                             DEC-01-1994
<PERIOD-END>                               NOV-30-1995
<INVESTMENTS-AT-COST>                          268,264
<INVESTMENTS-AT-VALUE>                         242,831
<RECEIVABLES>                                   15,008
<ASSETS-OTHER>                                       2
<OTHER-ITEMS-ASSETS>                                 0
<TOTAL-ASSETS>                                 257,841
<PAYABLE-FOR-SECURITIES>                         4,142
<SENIOR-LONG-TERM-DEBT>                              0
<OTHER-ITEMS-LIABILITIES>                        5,080
<TOTAL-LIABILITIES>                              9,222
<SENIOR-EQUITY>                                      0
<PAID-IN-CAPITAL-COMMON>                       387,784
<SHARES-COMMON-STOCK>                           35,739
<SHARES-COMMON-PRIOR>                           37,587
<ACCUMULATED-NII-CURRENT>                            0
<OVERDISTRIBUTION-NII>                             825
<ACCUMULATED-NET-GAINS>                       (112,907)
<OVERDISTRIBUTION-GAINS>                             0
<ACCUM-APPREC-OR-DEPREC>                       (25,433)
<NET-ASSETS>                                   248,619
<DIVIDEND-INCOME>                                    0
<INTEREST-INCOME>                               31,859
<OTHER-INCOME>                                       0
<EXPENSES-NET>                                  (2,453)
<NET-INVESTMENT-INCOME>                         29,406
<REALIZED-GAINS-CURRENT>                       (16,262)
<APPREC-INCREASE-CURRENT>                        9,509
<NET-CHANGE-FROM-OPS>                           22,653
<EQUALIZATION>                                       0
<DISTRIBUTIONS-OF-INCOME>                       29,458
<DISTRIBUTIONS-OF-GAINS>                             0
<DISTRIBUTIONS-OTHER>                                0
<NUMBER-OF-SHARES-SOLD>                          4,459
<NUMBER-OF-SHARES-REDEEMED>                     (8,121)
<SHARES-REINVESTED>                              1,814
<NET-CHANGE-IN-ASSETS>                          (1,848)
<ACCUMULATED-NII-PRIOR>                              0
<ACCUMULATED-GAINS-PRIOR>                            0
<OVERDISTRIB-NII-PRIOR>                           (755)
<OVERDIST-NET-GAINS-PRIOR>                           0
<GROSS-ADVISORY-FEES>                            1,316
<INTEREST-EXPENSE>                                   0
<GROSS-EXPENSE>                                  2,453
<AVERAGE-NET-ASSETS>                           263,221
<PER-SHARE-NAV-BEGIN>                             7.14
<PER-SHARE-NII>                                   0.79
<PER-SHARE-GAIN-APPREC>                          (0.17)
<PER-SHARE-DIVIDEND>                             (0.80)
<PER-SHARE-DISTRIBUTIONS>                            0
<RETURNS-OF-CAPITAL>                                 0
<PER-SHARE-NAV-END>                               6.96
<EXPENSE-RATIO>                                   0.93
<AVG-DEBT-OUTSTANDING>                               0
<AVG-DEBT-PER-SHARE>                                 0
        


<PAGE>



<TABLE> <S> <C>

<ARTICLE> 6
<SERIES>
<NUMBER> 142
<NAME> PAINEWEBBER HIGH INCOME FUND CLASS B
<MULTIPLIER> 1000
       
<S>                             <C>
<PERIOD-TYPE>                   12-MOS
<FISCAL-YEAR-END>                          NOV-30-1995
<PERIOD-START>                             DEC-01-1994
<PERIOD-END>                               NOV-30-1995
<INVESTMENTS-AT-COST>                          229,772
<INVESTMENTS-AT-VALUE>                         207,988
<RECEIVABLES>                                   12,855
<ASSETS-OTHER>                                       2
<OTHER-ITEMS-ASSETS>                                 0
<TOTAL-ASSETS>                                 220,845
<PAYABLE-FOR-SECURITIES>                         3,547
<SENIOR-LONG-TERM-DEBT>                              0
<OTHER-ITEMS-LIABILITIES>                        4,352
<TOTAL-LIABILITIES>                              7,899
<SENIOR-EQUITY>                                      0
<PAID-IN-CAPITAL-COMMON>                       332,143
<SHARES-COMMON-STOCK>                           30,630
<SHARES-COMMON-PRIOR>                           32,996
<ACCUMULATED-NII-CURRENT>                            0
<OVERDISTRIBUTION-NII>                             706
<ACCUMULATED-NET-GAINS>                        (96,707)
<OVERDISTRIBUTION-GAINS>                             0
<ACCUM-APPREC-OR-DEPREC>                       (21,784)
<NET-ASSETS>                                   212,946
<DIVIDEND-INCOME>                                    0
<INTEREST-INCOME>                               28,273
<OTHER-INCOME>                                       0
<EXPENSES-NET>                                  (3,928)
<NET-INVESTMENT-INCOME>                         24,345
<REALIZED-GAINS-CURRENT>                       (13,929)
<APPREC-INCREASE-CURRENT>                        8,144
<NET-CHANGE-FROM-OPS>                           18,560
<EQUALIZATION>                                       0
<DISTRIBUTIONS-OF-INCOME>                       24,399
<DISTRIBUTIONS-OF-GAINS>                             0
<DISTRIBUTIONS-OTHER>                                0
<NUMBER-OF-SHARES-SOLD>                         10,325
<NUMBER-OF-SHARES-REDEEMED>                    (13,938)
<SHARES-REINVESTED>                              1,247
<NET-CHANGE-IN-ASSETS>                          (2,366)
<ACCUMULATED-NII-PRIOR>                              0
<ACCUMULATED-GAINS-PRIOR>                            0
<OVERDISTRIB-NII-PRIOR>                           (662)
<OVERDIST-NET-GAINS-PRIOR>                           0
<GROSS-ADVISORY-FEES>                            1,169
<INTEREST-EXPENSE>                                   0
<GROSS-EXPENSE>                                 (3,928)
<AVERAGE-NET-ASSETS>                           233,692
<PER-SHARE-NAV-BEGIN>                             7.14
<PER-SHARE-NII>                                   0.74
<PER-SHARE-GAIN-APPREC>                         (0.18)
<PER-SHARE-DIVIDEND>                            (0.75)
<PER-SHARE-DISTRIBUTIONS>                            0
<RETURNS-OF-CAPITAL>                                 0
<PER-SHARE-NAV-END>                               6.95
<EXPENSE-RATIO>                                   1.68
<AVG-DEBT-OUTSTANDING>                               0
<AVG-DEBT-PER-SHARE>                                 0
        

<PAGE>



<TABLE> <S> <C>

<ARTICLE> 6
<SERIES>
<NUMBER> 143
<NAME> PAINEWEBBER HIGH INCOME FUND CLASS C
<MULTIPLIER> 1000
       
<S>                             <C>
<PERIOD-TYPE>                   12-MOS
<FISCAL-YEAR-END>                          NOV-30-1995
<PERIOD-START>                             DEC-01-1994
<PERIOD-END>                               NOV-30-1995
<INVESTMENTS-AT-COST>                          112,121
<INVESTMENTS-AT-VALUE>                         101,492
<RECEIVABLES>                                    6,273
<ASSETS-OTHER>                                       1
<OTHER-ITEMS-ASSETS>                                 0
<TOTAL-ASSETS>                                 107,765
<PAYABLE-FOR-SECURITIES>                         1,731
<SENIOR-LONG-TERM-DEBT>                              0
<OTHER-ITEMS-LIABILITIES>                        2,123
<TOTAL-LIABILITIES>                              3,854
<SENIOR-EQUITY>                                      0
<PAID-IN-CAPITAL-COMMON>                       162,075
<SHARES-COMMON-STOCK>                           14,915
<SHARES-COMMON-PRIOR>                           16,107
<ACCUMULATED-NII-CURRENT>                            0
<OVERDISTRIBUTION-NII>                             344
<ACCUMULATED-NET-GAINS>                        (47,190)
<OVERDISTRIBUTION-GAINS>                             0
<ACCUM-APPREC-OR-DEPREC>                       (10,630)
<NET-ASSETS>                                   10,3911
<DIVIDEND-INCOME>                                    0
<INTEREST-INCOME>                               13,659
<OTHER-INCOME>                                       0
<EXPENSES-NET>                                  (1,631)
<NET-INVESTMENT-INCOME>                         12,028
<REALIZED-GAINS-CURRENT>                        (6,797)
<APPREC-INCREASE-CURRENT>                        3,974
<NET-CHANGE-FROM-OPS>                            9,205
<EQUALIZATION>                                       0
<DISTRIBUTIONS-OF-INCOME>                      (12,058)
<DISTRIBUTIONS-OF-GAINS>                             0
<DISTRIBUTIONS-OTHER>                                0
<NUMBER-OF-SHARES-SOLD>                          8,405
<NUMBER-OF-SHARES-REDEEMED>                    (10,509)
<SHARES-REINVESTED>                                912
<NET-CHANGE-IN-ASSETS>                          (1,192)
<ACCUMULATED-NII-PRIOR>                              0
<ACCUMULATED-GAINS-PRIOR>                            0
<OVERDISTRIB-NII-PRIOR>                           (324)
<OVERDIST-NET-GAINS-PRIOR>                           0
<GROSS-ADVISORY-FEES>                              565
<INTEREST-EXPENSE>                                   0
<GROSS-EXPENSE>                                  1,631
<AVERAGE-NET-ASSETS>                           113,126
<PER-SHARE-NAV-BEGIN>                             7.15
<PER-SHARE-NII>                                   0.76
<PER-SHARE-GAIN-APPREC>                          (0.18)
<PER-SHARE-DIVIDEND>                             (0.76)
<PER-SHARE-DISTRIBUTIONS>                            0
<RETURNS-OF-CAPITAL>                                 0
<PER-SHARE-NAV-END>                               6.97
<EXPENSE-RATIO>                                   1.44
<AVG-DEBT-OUTSTANDING>                               0
<AVG-DEBT-PER-SHARE>                                 0
        


<PAGE>




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