NUVEEN MUNICIPAL TRUST/MA
497, 2000-10-26
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<PAGE>   1

                                                         NUVEEN INVESTMENTS LOGO

                   IMPORTANT INFORMATION FOR SHAREHOLDERS OF
                    NUVEEN INTERMEDIATE MUNICIPAL BOND FUND

Your Nuveen Intermediate Municipal Bond Fund (formerly known as Nuveen Flagship
Intermediate Municipal Bond Fund) will host a Special Meeting of Shareholders at
10:00 a.m. on Wednesday, October 25, 2000, on the 31st Floor at our headquarters
in Chicago, Illinois. The purpose is to vote on an important proposal affecting
your Fund.

The first few pages of this booklet summarize the proposal and explain the proxy
process -- including how to cast your vote. Before you vote, please read the
full text of the proxy statement for a complete understanding of the proposal.

Q. WHAT ARE SHAREHOLDERS BEING ASKED TO VOTE ON AT THE UPCOMING SPECIAL
   SHAREHOLDER MEETING ON WEDNESDAY, OCTOBER 25, 2000?

A. The Board of Trustees for Nuveen Intermediate Municipal Bond Fund (the
   "Fund") has called a Special Shareholder Meeting for 10:00 a.m. on Wednesday,
   October 25, 2000 at which you will be asked to vote on a reorganization (the
   "Reorganization") of your Fund into Nuveen Intermediate Duration Municipal
   Bond Fund (the "Surviving Fund").

   THE PROPOSAL HAS BEEN APPROVED BY THE TRUSTEES FOR YOUR FUND AND THE
   SURVIVING FUND, WHO UNANIMOUSLY RECOMMEND YOU VOTE "FOR" THE PROPOSAL.

Q. ARE THERE ANY DIFFERENCES BETWEEN THE FUND AND THE SURVIVING FUND?

A. The Surviving Fund is substantially the same as the Fund in its philosophy,
   investment objectives and policies, and day-to-day portfolio management.

Q. ARE THERE ANY DIFFERENCES IN THE RISKS OF INVESTING IN THE FUND AND THE
   SURVIVING FUND?

A. Yes. Please see "Rick Factors" on page 9 of this Prospectus/Proxy Statement.

Q. WHAT ADVANTAGES WILL THIS PRODUCE FOR FUND SHAREHOLDERS?

A. It is expected that the proposed Reorganization will (i) result in higher
   dividends per share from a higher gross embedded yield and lower gross
   operating expenses due to the Surviving Fund's larger net assets and greater
   economies of scale; (ii) preserve the Fund's intermediate risk
   characteristics; (iii) improve portfolio diversification; and (iv) lower
   portfolio transaction costs.

Q. WHAT IS THE TIMETABLE FOR THE REORGANIZATION?

A. Effective August 9, 2000, the Fund was closed to new investors; existing
   investors, however, may continue to make additional purchases and reinvest
   dividends. If approved by shareholders on October 25, 2000, the
   Reorganization is expected to take place on October 27, 2000.

Q. WILL I RECEIVE NEW SHARES IN EXCHANGE FOR MY CURRENT SHARES?

A. Yes. Upon approval and completion of the Reorganization, shareholders of the
   Fund will have their shares automatically exchanged for shares of the
   Surviving Fund based upon a specified exchange ratio determined by the ratio
   of the respective net asset values of the Funds. You will receive Surviving
   Fund shares whose aggregate value at the time of issuance will equal the
   aggregate value of your Fund shares on that date.

Q. IF I OWN SHARES IN CERTIFICATE FORM, WILL I NEED TO EXCHANGE THEM FOR
   CERTIFICATES OF THE SURVIVING FUND?

A. Certificates for Surviving Fund shares will not be issued automatically as
   part of the Reorganization, although we will send you certificates upon
   request. If you currently own Fund shares in certificate form, you will need
   to return these certificates to Nuveen in order to receive new certificates
   for your Surviving Fund shares.
<PAGE>   2

   If you prefer, however, you may exchange your certificates for book entry
   shares. These shares are held in a convenient computerized system that
   enables shareholders to receive a complete and accurate record of their
   holdings without having to worry about the safekeeping of certificates or the
   expense involved with replacing a lost or stolen certificate. Just complete
   the appropriate section of the Letter of Transmittal requesting book entry
   shares. Regardless of the way you choose to hold your shares after the
   Reorganization, certificates should be returned to the Fund's transfer agent
   by certified mail as soon as possible.

Q. WILL I HAVE TO PAY ANY FEES OR EXPENSES IN CONNECTION WITH THE
   REORGANIZATION?

A. You will pay no fees or sales charges directly in connection with the
   implementation of the proposed changes. However, the costs associated with
   the Reorganization will be borne by the Fund. These costs are estimated to be
   $0.016 per share. The costs are expected to be more than offset over time by
   the anticipated lower operating costs of the Surviving Fund.

Q. HOW DO MANAGEMENT FEES AND OTHER FUND OPERATING EXPENSES COMPARE BETWEEN MY
   FUND AND THE SURVIVING FUND?

A. The Surviving Fund has the same management fee schedule as your Fund. Total
   gross operating expenses (before waivers and reimbursements by Nuveen) as a
   percentage of net assets for the Surviving Fund are lower than those for your
   Fund, reflecting the larger net assets and greater economies of scale of the
   Surviving Fund. For the past fiscal year, net operating expenses (after
   voluntary waivers and reimbursements by Nuveen) as a percentage of net assets
   for the Fund were lower than those for the Surviving Fund.

   There can be no assurance that Nuveen will continue these waivers or
   reimbursements for the Fund if the Reorganization is not approved.

Q. WILL THIS REORGANIZATION CREATE A TAXABLE EVENT FOR ME?

A. The Reorganization is intended to be completed on a tax-free basis for
   federal income tax purposes. Therefore, you will recognize no gain or loss
   for federal income tax purposes as a result of the Reorganization. In
   addition, the tax basis and holding period of the Surviving Fund shares you
   receive will be the same as the tax basis and holding period of your Fund
   shares.

Q. CAN I EXCHANGE OR REDEEM MY FUND SHARES BEFORE THE REORGANIZATION TAKES
   PLACE?

A. You may exchange your Fund shares for shares of any other Nuveen Mutual Fund,
   or redeem your shares, at any time. If you choose to do so, your request will
   be treated as a normal exchange or redemption of shares and will be a taxable
   transaction for federal income tax purposes. Nuveen will waive any deferred
   sales charge that would otherwise apply to a redemption or exchange of your
   Fund shares prior to the Reorganization.

Q. HOW DO I VOTE MY SHARES?

A. You may vote in person, by mail, by telephone or over the Internet. To vote
   in person, you may attend the special meeting of shareholders which will be
   held in the 31st floor conference room of Nuveen located at 333 West Wacker
   Drive, Chicago, Illinois on Wednesday, October 25, 2000 at 10:00 a.m. To vote
   by mail, please mark, sign and date the enclosed proxy card(s), and mail it
   in the enclosed postage-paid envelope, allowing sufficient time for your
   proxy to be received on or before Wednesday, October 25, 2000. No postage is
   required if the proxy is mailed in the United States. To vote by telephone,
   call the number indicated on your proxy card, enter the 12-digit control
   number found in the right portion of your proxy card, and follow the recorded
   instructions, using your proxy card as a guide. To vote over the Internet, go
   to www.proxyvote.com, enter the 12-digit control number found on the right
   portion of your proxy card, and follow the instructions, using your proxy
   card as a guide.

Q. WILL NUVEEN CONTACT ME?

A. You may receive a call from Nuveen or D.F. King, our proxy solicitation
   agent, to verify that you received your proxy materials and to answer any
   questions you may have about the Reorganization.

THE PROPOSAL HAS BEEN APPROVED BY THE TRUSTEES FOR YOUR FUND AND THE SURVIVING
FUND, WHO UNANIMOUSLY RECOMMEND YOU VOTE "FOR" THE PROPOSAL. Please give this
matter your prompt attention. We will need to receive your vote before the
shareholder meeting scheduled for October 25, 2000. YOUR IMMEDIATE RESPONSE WILL
HELP SAVE ON THE COSTS OF ADDITIONAL SOLICITATIONS. We look forward to your
participation, and we thank you for your continued confidence in Nuveen.
<PAGE>   3

<TABLE>
<S>                                                           <C>
NOTICE OF SPECIAL MEETING
OF SHAREHOLDERS
OCTOBER 25, 2000
</TABLE>

NUVEEN INTERMEDIATE MUNICIPAL BOND FUND

Notice is hereby given that a Special Meeting of shareholders of Nuveen
Intermediate Municipal Bond Fund, formerly known as Nuveen Flagship Intermediate
Municipal Bond Fund (the "Fund"), a series of Nuveen Municipal Trust, formerly
known as Nuveen Flagship Municipal Trust (the "Trust"), a Massachusetts business
trust, will be held in the 31st floor conference room of Nuveen Investments, 333
West Wacker Drive, in Chicago on Wednesday, October 25, 2000 at 10:00 a.m.,
Central Time (the "Special Meeting"), for the following purposes:

        1. To approve an Agreement and Plan of Reorganization pursuant to
           which the Fund would (i) transfer all of its assets to Nuveen
           Intermediate Duration Municipal Bond Fund (the "Surviving
           Fund") in exchange for Class A, C and R shares of beneficial
           interest of the Surviving Fund and the Surviving Fund's
           assumption of the liabilities of the Fund, (ii) distribute such
           shares of the Surviving Fund to the holders of shares of the
           Fund and (iii) be liquidated, dissolved and terminated as a
           series of the Trust in accordance with the Trust's Declaration
           of Trust.

        2. To transact such other business as may properly come before the
           Special Meeting.

Shareholders of record as of the close of business on August 15, 2000 are
entitled to notice of and to vote at the Special Meeting or any adjournment
thereof.

IN ORDER TO AVOID DELAY AND ADDITIONAL EXPENSE, AND TO ASSURE THAT YOUR SHARES
ARE REPRESENTED, IF YOU DO NOT EXPECT TO BE PRESENT IN PERSON AT THE SPECIAL
MEETING, YOU ARE REQUESTED TO VOTE BY MAIL, BY TELEPHONE OR OVER THE INTERNET.

THE PROPOSAL HAS BEEN APPROVED BY THE TRUSTEES OF THE FUND AND THE SURVIVING
FUND, WHO UNANIMOUSLY RECOMMEND YOU VOTE "FOR" THE PROPOSAL.

Gifford R. Zimmerman
Vice President and Secretary
<PAGE>   4

<TABLE>
<S>                                                           <C>

PROSPECTUS/
PROXY STATEMENT
</TABLE>

NUVEEN INTERMEDIATE DURATION MUNICIPAL BOND FUND (THE "SURVIVING FUND")
RELATING TO THE ACQUISITION OF ASSETS AND LIABILITIES OF
NUVEEN INTERMEDIATE MUNICIPAL BOND FUND (THE "FUND")

This Prospectus/Proxy Statement is being furnished to shareholders of Nuveen
Intermediate Municipal Bond Fund, formerly known as Nuveen Flagship Intermediate
Municipal Bond Fund (the "Fund"), a series of Nuveen Municipal Trust, formerly
Nuveen Flagship Municipal Trust (the "Trust"), a Massachusetts business trust,
and relates to the special meeting of shareholders of the Fund to be held in the
31st floor conference room of Nuveen Investments, 333 West Wacker Drive, in
Chicago on Wednesday, October 25, 2000 at 10:00 a.m., Central Time and at any
and all adjournments thereof (the "Special Meeting"). Shareholders of record as
of the close of business on August 15, 2000 are entitled to vote at the Special
Meeting or any adjournment thereof. The primary purpose of the Special Meeting
is to approve or disapprove the proposed reorganization of the Fund into Nuveen
Intermediate Duration Municipal Bond Fund (the "Surviving Fund") (the
"Reorganization"). The Reorganization will result in shareholders of the Fund in
effect exchanging their Class A, C and R shares of the Fund for corresponding
Class A, C and R shares of the Surviving Fund. It is expected that the proposed
Reorganization will (i) result in higher dividends per share from a higher gross
embedded yield and lower operating expenses due to the Surviving Fund's larger
net assets and greater economies of scale; (ii) preserve the Fund's intermediate
risk characteristics; (iii) improve portfolio diversity and (iv) lower portfolio
transaction costs.

The Fund is also a series of the Trust. The investment objective of the
Surviving Fund is to provide as high a level of current interest income exempt
from regular federal income taxes as is consistent with preservation of capital.
There can be no assurance that the Surviving Fund will achieve its investment
objective. The address, principal executive office and telephone number of the
Fund and the Surviving Fund is 333 West Wacker Drive, Chicago, Illinois 60606,
(312) 917-7700 or (800) 621-7227. The enclosed proxy and this Prospectus/Proxy
Statement are first being sent to shareholders of the Fund on or about September
6, 2000.
                            ------------------------

THESE SECURITIES HAVE NOT BEEN APPROVED OR DISAPPROVED BY THE SECURITIES AND
EXCHANGE COMMISSION OR ANY STATE REGULATORS, NOR HAS THE SECURITIES AND EXCHANGE
COMMISSION OR ANY STATE REGULATORS PASSED UPON THE ACCURACY OR ADEQUACY OF THIS
PROSPECTUS/PROXY STATEMENT. ANY REPRESENTATION TO THE CONTRARY IS A CRIMINAL
OFFENSE.
                            ------------------------

This Prospectus/Proxy Statement sets forth concisely the information
shareholders of the Fund should know before voting on the Reorganization (in
effect, investing in Class A, C or R shares of the Surviving Fund) and
constitutes an offering of Class A, C or R shares of beneficial interest, par
value $.01 per share, of the Surviving Fund only. Please read it carefully and
retain it for future reference. A Statement of Additional Information dated
September 6, 2000, relating to this Prospectus/ Proxy Statement (the
"Reorganization SAI") has been filed with the Securities and Exchange Commission
(the "SEC") and is incorporated herein by reference. A Prospectus (the "Funds'
Prospectus") and Statement of Additional Information containing additional
information about the Surviving Fund and the Fund, dated August 28, 2000, have
been filed with the SEC and is incorporated herein by reference. A copy of the
Surviving Fund's prospectus accompanies this Prospectus/Proxy Statement. Copies
of the foregoing may be obtained without charge by calling or writing the Fund
at the telephone number or address shown above. If you wish to request the
Reorganization SAI, please ask for the "Reorganization SAI." IN ADDITION, EACH
FUND WILL FURNISH, WITHOUT CHARGE, A COPY OF ITS MOST RECENT ANNUAL REPORT AND
SUBSEQUENT SEMI-ANNUAL REPORT TO A SHAREHOLDER UPON REQUEST. ANY SUCH REQUEST
SHOULD BE DIRECTED TO THE RESPECTIVE FUND BY CALLING (800) 621-7227 OR BY
WRITING THE RESPECTIVE FUND AT 333 WEST WACKER DRIVE, CHICAGO, ILLINOIS 60606.
                            ------------------------

No person has been authorized to give any information or make any representation
not contained in this Prospectus/Proxy Statement and, if so given or made, such
information or representation must not be relied upon as having been authorized.
This Prospectus/Proxy Statement does not constitute an offer to sell or a
solicitation of an offer to buy any securities in any jurisdiction in which, or
to any person to whom, it is unlawful to make such offer or solicitation.
                            ------------------------

The Trust is subject to the informational requirements of the Securities
Exchange Act of 1934, as amended, and the Investment Company Act of 1940, as
amended (the "1940 Act"), and in accordance therewith files reports and other
information with the SEC. Such reports, other information and proxy statements
filed by the Trust can be inspected and copied at the public reference
facilities maintained by the SEC at 450 Fifth Street, N.W., Washington, D.C.
20549, and at its Regional Office at 500 West Madison Street, Chicago, Illinois.
Copies of such material can also be obtained from the SEC's Public Reference
Branch, Office of Consumer Affairs and Information Services, Washington, D.C.
20549, or by sending a request by e-mail to [email protected], at prescribed
rates. In addition, the SEC maintains a Web site (http://www.sec.gov) that
contains reports, other information and proxy statements filed by the Trust,
such information is filed electronically with the SEC through the SEC's
Electronic Data Gathering, Analysis and Retrieval system (EDGAR).

       THE DATE OF THIS PROSPECTUS/PROXY STATEMENT IS SEPTEMBER 6, 2000.
<PAGE>   5

PROSPECTUS/
PROXY STATEMENT

NUVEEN INTERMEDIATE DURATION MUNICIPAL BOND FUND ("SURVIVING FUND")
RELATING TO THE ACQUISITION OF ASSETS AND LIABILITIES OF
NUVEEN INTERMEDIATE MUNICIPAL BOND FUND ("FUND")

TABLE OF CONTENTS

<TABLE>
<CAPTION>
                                             PAGE
                                             ----
<S>                                          <C>
THE PROPOSED REORGANIZATION................    1
A. SUMMARY.................................    1
     The Proposed Reorganization...........    1
     Reasons for the Proposed
       Reorganization......................    1
     Comparison of the Surviving Fund with
       the Fund............................    2
B. RISK FACTORS............................    9
     Similarities of Risks.................    9
     Differences in Risks..................    9
C. THE PROPOSED REORGANIZATION.............    9
     Terms of the Agreement................   10
     Description of Securities to be
       Issued..............................   10
     Continuation of Shareholder Accounts
       and Plans; Share Certificates.......   11
</TABLE>

<TABLE>
<CAPTION>
                                             PAGE
                                             ----
<S>                                          <C>
     Certain Federal Income Tax
       Consequences........................   11
     Expenses..............................   12
     Legal Matters.........................   12
     Financial Statements..................   12
D. RECOMMENDATION OF THE BOARD.............   12
E. OTHER INFORMATION.......................   13
     Shareholders of the Surviving Fund and
          the Fund.........................   13
     Shareholder Proposals.................   14
F. VOTING INFORMATION AND REQUIREMENTS.....   14

Exhibit A: Financial Highlights............  A-1
</TABLE>
<PAGE>   6

                          THE PROPOSED REORGANIZATION

A. SUMMARY

The following is a summary of, and is qualified by reference to, the more
complete information contained in this Prospectus/ Proxy Statement and the
information attached hereto or incorporated herein by reference (including the
Agreement and Plan of Reorganization). As discussed more fully below and
elsewhere in this Prospectus/Proxy Statement, the Board of Trustees of the Fund
(the "Board") believes the proposed Reorganization (as defined herein) is in the
best interests of shareholders of the Fund and would not result in dilution of
shareholders' interest. As a result of the Reorganization, shareholders of the
Fund will become shareholders of the Surviving Fund and will cease to be
shareholders of the Fund.

Shareholders should read the entire Prospectus/Proxy Statement carefully
together with the Funds' Prospectus incorporated herein by reference and
accompanying this Prospectus/Proxy Statement. This Prospectus/Proxy Statement
constitutes an offering of Class A, C and R shares of the Surviving Fund only.

THE PROPOSED REORGANIZATION

This Prospectus/Proxy Statement is being furnished to shareholders of the Fund
in connection with the proposed combination of the Fund with and into the
Surviving Fund pursuant to the terms and conditions of the Agreement and Plan of
Reorganization dated July 24, 2000 between the Fund and the Surviving Fund (the
"Agreement"). The Agreement provides that the Fund will (i) transfer all of its
assets to the Surviving Fund in exchange for Class A, C and R shares of the
Surviving Fund and the Surviving Fund's assumption of the liabilities of the
Fund, (ii) distribute to each shareholder of the Fund shares of the respective
class of shares of the Surviving Fund equal in value to their existing shares of
the Fund as a distribution in liquidation of the Fund and (iii) be liquidated,
dissolved and terminated as a series of the Trust in accordance with the Trust's
Declaration of Trust promptly following the Closing (as defined herein) (the
"Reorganization").

The Board of Trustees of the Trust has determined that the Reorganization is in
the best interests of each Fund and that the interests of existing shareholders
of each Fund will not be diluted as a result of the Reorganization. The Board of
the Trust unanimously approved the Reorganization and the Agreement on July 24,
2000.

The Fund will pay all of the Funds' costs associated with the Reorganization,
which are estimated to be $85,000 (or $0.0016 per share).

The Board is asking shareholders of the Fund to approve the Reorganization at
the Special Meeting to be held on Wednesday, October 25, 2000. If shareholders
of the Fund approve the Reorganization, it is expected that the Closing of the
Reorganization will be after the close of business on October 27, 2000, but it
may be at a different time as described herein.

THE BOARD RECOMMENDS A VOTE "FOR" THE REORGANIZATION. FOR THE FUND, APPROVAL OF
THE REORGANIZATION REQUIRES THE FAVORABLE VOTE OF THE HOLDERS OF A MAJORITY OF
THE OUTSTANDING SHARES ENTITLED TO VOTE. SEE "VOTING INFORMATION AND
REQUIREMENTS" BELOW.

REASONS FOR THE PROPOSED REORGANIZATION

The Board considered a number of alternatives to the Reorganization, and decided
that the Reorganization was in the best interests of the Fund's shareholders.
The Board believes that the proposed reorganization would be in the best
interests of the Fund because it is expected that the proposed Reorganization
will (i) result in higher dividends per share from lower operating expenses due
to the Surviving Fund's larger net assets and greater economies of scale; (ii)
preserve the Fund's intermediate risk characteristics; (iii) improve portfolio
diversity and (iv) lower portfolio transaction costs.

In determining whether to recommend approval of the Reorganization to
shareholders of the Fund, the Board considered a number of factors, including,
but not limited to: (i) the expenses and advisory fees applicable to the Fund
and the Surviving Fund before the Reorganization and the estimated expense
ratios of the Surviving Fund after the Reorganization; (ii) the investment
performance of the Fund compared to the Surviving Fund: (iii) the terms and
conditions of the Agreement and whether the Reorganization would result in
dilution of shareholder interests; (iv) the economies of scale potentially
realized through the combination of the Funds; (v) the compatibility of the
Funds' investment objectives and policies; (vi) the compatibility of the Funds'
service features available to shareholders, including the retention of
applicable holding periods and exchange privileges; (vii) the costs estimated to
be incurred by the Fund as a result of the Reorganization; (viii) the future
growth prospects of the Fund; and (ix) the anticipated federal income tax
consequences of the Reorganization.

In this regard, the Board reviewed information provided by Nuveen Advisory Corp.
(the "Adviser") relating to the anticipated impact on the shareholders of the
Fund as a result of the Reorganization. The Board considered the probability
that the increase in asset levels of the Surviving Fund after the Reorganization
and the higher earnings rate and increased dividend potential would result in
the following potential benefits for shareholders of the Fund, although there
can be no assurances in this regard:

A. Achievement of Economies of Scale and Reduced Per Share Expenses. Combining
   the net assets of the Fund with the assets of the Surviving Fund will lead to
   reduced total operating expenses for shareholders of the Fund on a per share
   basis, by allowing fixed and relatively fixed costs, such as accounting,
   legal and printing expenses, to be spread over a larger asset base. Any
   reductions in expenses on a per share basis should, in turn, increase
   portfolio net income
 1
<PAGE>   7

   available for distributions to shareholders of the Fund. For the Fund, the
   Adviser currently is voluntarily waiving some or all of its fees or
   reimbursing certain expenses and, for the Surviving Fund, the Adviser has
   done so in the past. Before these waivers/reimbursements, the net operating
   expenses of the Surviving Fund are lower than those of the Fund. However,
   there can be no assurance that the Adviser will continue the
   waivers/reimbursements for the Fund if the Reorganization is not completed.

B. Benefits to the Portfolio Management Process. The larger net asset size of
   the Surviving Fund generally permits it to purchase larger individual
   portfolio investments that may result in reduced transaction costs or more
   favorable pricing and provide the opportunity for greater portfolio
   diversity. A larger, more diverse fund may also be able to produce a more
   stable and consistent dividend rate than a smaller, less diverse fund.

The Board also considered that the costs of the Reorganization will be paid by
the Fund regardless of whether or not the Reorganization is completed (and such
costs are not subject to the current waivers/reimbursements). In addition, the
Board considered that the Reorganization would result in benefits and economies
for the Adviser and the elimination of the voluntary waivers/reimbursements for
the Fund.

COMPARISON OF THE SURVIVING FUND WITH THE FUND

Investment Objectives. The Surviving Fund and the Fund have substantially
identical investment objectives. The investment objective of each Fund is to
provide as high a level of current interest income exempt from regular federal
income taxes as is consistent with preservation of capital.

Investment Policies. The Surviving Fund and the Fund have similar investment
policies. The Funds invest substantially all of their assets (at least 80%) in
municipal bonds that pay interest that is exempt from regular federal income
taxes. Both Funds purchase only quality municipal bonds that either are rated
investment grade (AAA/Aaa to BBB/Baa) by independent ratings agencies at the
time of purchase or are non-rated but judged to be investment grade by the
Adviser. Both Funds invest at least 80% of their net assets in investment-grade
quality municipal bonds. Bond ratings are furnished by Standard & Poor's
Corporation ("S&P"), Moody's Investor Services ("Moody's"), and Fitch Investors
Service, Inc. ("Fitch"). According to published guidelines, securities rated BBB
by S&P are regarded by S&P as having an adequate capacity to pay interest and
repay principal. Whereas such securities normally exhibit adequate protection
parameters, adverse economic conditions or changing circumstances are more
likely, in the opinion of S&P, to lead to a weakened capacity to pay interest
and repay principal for debt in this category than in higher rated categories.
According to published guidelines, securities rated Baa by Moody's are
considered by Moody's as medium grade obligations. Such securities are, in the
opinion of Moody's, neither highly protected nor poorly secured. Interest
payments and principal security appear to Moody's to be adequate for the present
but certain protective elements may be lacking or may be characteristically
unreliable over any great length of time. In the opinion of Moody's they lack
outstanding investment characteristics and in fact have speculative
characteristics as well.

Both Funds maintain price volatility (as measured by weighted average portfolio
duration) characteristic of intermediate-term bond funds, but each seeks to do
so in a different way. The Fund does so by limiting the weighted average
maturity of its investment portfolio under normal market conditions to between 5
and 10 years. The Surviving Fund does not limit the weighted average maturity of
its investment portfolio, but instead limits the weighted average duration of
its investment portfolio under normal market conditions to between 4.5 and 7
years in order to be classified as an intermediate fund. In evaluating the
Reorganization, each Fund shareholder should consider the differences between
these two approaches. For a description of the risks involved in investing in
each Fund, please see the section below entitled "Differences in Risks."

Credit Quality. A comparison of the credit qualities of the respective
portfolios of the Surviving Fund and the Fund, as of June 30, 2000, and the
pro-forma credit quality on that date is set forth in the table below.

<TABLE>
<CAPTION>
                                      PORTFOLIO CREDIT QUALITY
----------------------------------------------------------------------------------------------------
                                                                SURVIVING     THE
                       CREDIT RATING                              FUND        FUND     PRO-FORMA (1)
----------------------------------------------------------------------------------------------------
<S>                                                             <C>          <C>       <C>
AAA/U.S. Guaranteed                                                 45.10%    36.46%           44.92%
AA                                                                  33.14      3.29            32.53
A                                                                   11.85     13.41            11.88
BBB                                                                  9.68     31.50            10.13
Unrated                                                               .23     15.34              .54
                                                                ---------    ------    -------------
TOTAL                                                              100.00%   100.00%          100.00%
----------------------------------------------------------------------------------------------------
</TABLE>

(1) Reflects the effect of the Reorganization.

As of June 30, 2000, the Fund and Surviving Fund were invested in
similarly-rated securities. On June 30, 2000, the average portfolio credit
quality was A for the Fund, AA+ for the Surviving Fund and AA for the pro-forma
portfolio.

 2
<PAGE>   8

Maturity and Duration. A comparison of the maturity and duration of the
respective portfolios of the Surviving Fund and the Fund as of June 30, 2000 and
the pro-forma maturity and duration on that date is set forth in the table
below.

<TABLE>
<CAPTION>
                             PORTFOLIO MATURITY AND DURATION INFORMATION
------------------------------------------------------------------------------------------------------
                                                              AVERAGE EFFECTIVE
                            FUND                              MATURITY (YEARS)        AVERAGE DURATION
------------------------------------------------------------------------------------------------------
<S>                                                           <C>                     <C>
Surviving Fund                                                            15.59                   6.70
The Fund                                                                   8.42                   6.61
Pro-Forma (1)                                                             15.45                   6.70
------------------------------------------------------------------------------------------------------
</TABLE>

(1) Reflects the effect of the Reorganization.

Funds with longer average maturities and duration will generally be subject to
greater interest rate risk. Please see "B. Risk Factors -- Differences in Risks"
below for a description of maturity, duration and interest rate risk.

Performance Information. A comparison of the total returns for the Surviving
Fund and the Fund for the periods ending June 30, 2000, is set forth in the
table below.

<TABLE>
<CAPTION>
                                                          TOTAL RETURNS
---------------------------------------------------------------------------------------------------------------------------------
                                                                                     AVERAGE ANNUAL TOTAL RETURNS
                                                      CUMULATIVE      -----------------------------------------------------------
        FUND             CLASS      INCEPTION DATE    YTD RETURN      1 YEAR      3 YEAR      5 YEAR      TEN YEAR      INCEPTION
---------------------------------------------------------------------------------------------------------------------------------
<S>                    <C>          <C>               <C>             <C>         <C>         <C>         <C>           <C>
Surviving Fund (1)       A (NAV)              6/95          4.30%       1.77%       4.10%       5.20%         6.25%          6.63%
                       A (Offer)              6/95         (0.11)      (2.52)       2.61        4.30          5.79           6.44
                               C              6/95          2.98        1.05        3.51        4.54          5.52           5.86
                               R             11/76          4.28        1.86        4.29        5.42          6.50           6.89
The Fund (2)             A (NAV)              9/92          2.51        1.63        3.76        5.19           N/A           5.87
                       A (Offer)              9/92         (0.52)      (1.43)       2.71        4.54           N/A           5.45
                               C             12/95          1.31        1.04        3.25        4.65           N/A           5.31
                               R              2/97          2.71        1.81        4.00        5.32           N/A           5.95
---------------------------------------------------------------------------------------------------------------------------------
</TABLE>

(1) Class R share returns are actual. Class A and C share returns are actual for
    the period since class inception; returns prior to class inception are Class
    R share returns adjusted for differences in sales charges and expenses,
    which are primarily differences in distribution and service fees. Class A
    shares have a 4.20% maximum sales charge. Class C shares have a 1% CDSC for
    redemptions within one year which is reflected in the YTD total return but
    is not reflected in the one-year total return.
(2) Class A share returns are actual. Class C and R share returns are actual for
    the period since class inception; returns prior to class inception are Class
    A share returns adjusted for differences in sales charges and expenses,
    which are primarily differences in distribution and service fees. Class A
    shares have a 3.0% maximum sales charge. Class C shares have a 1% CDSC for
    redemptions within one year which is reflected in the YTD total return but
    is not reflected in the one-year total return.

The following table is a comparison of the respective yields and distribution
rates for the Surviving Fund and the Fund as of June 30, 2000.

<TABLE>
<CAPTION>
                                     SEC Yield and Distribution Information (1)
---------------------------------------------------------------------------------------------------------------------
                                                                                                  SEC 30-DAY YIELD(2)
                                                                               --------------------------------------
                                                            DISTRIBUTION       BEFORE WAIVERS/         AFTER WAIVERS/
                    FUND                         CLASS          RATE           REIMBURSEMENTS          REIMBURSEMENTS
---------------------------------------------------------------------------------------------------------------------
<S>                                            <C>          <C>                <C>                     <C>
Surviving Fund                                 A (NAV)          5.00%               4.95%                   4.95%
                                               A (Offer)        4.79                4.75                    4.75
                                               B                4.25                4.21                    4.21
                                               C                4.45                4.41                    4.41
                                               R                5.20                5.17                    5.17
The Fund                                       A (NAV)          4.90                4.95                    5.12
                                               A (Offer)        4.76                4.80                    4.97
                                               C                4.35                4.40                    4.57
                                               R                5.10                5.14                    5.31
Pro-Forma                                      A (NAV)          5.00                4.99                    4.99
                                               A (Offer)        4.85                4.84                    4.84
                                               B                4.25                4.25                    4.25
                                               C                4.45                4.44                    4.44
                                               R                5.20                5.17                    5.17
---------------------------------------------------------------------------------------------------------------------
</TABLE>

(1) The SEC 30-Day Yield is computed in accordance with SEC rules by dividing
    the net investment income per share (computed in accordance with a
    standardized method prescribed by the rules) earned during the 30-day period
    by the NAV (or the maximum offering price where noted). The Distribution
    Rate is computed by taking the monthly dividend per share, multiplying it by
    12 to annualize it, and dividing by the NAV (or the maximum offering price
    where noted). The Distribution Rate differs from the SEC Yield and total
    return
 3
<PAGE>   9

    and is not intended to be a complete measure of performance. Distribution
    Rate may differ from SEC Yield due to a number of factors, including that
    Distribution Rates may not include the effect of amortization of bond
    premiums to the extent such premiums arise after the bonds were purchased
    and that there may be differences between the amount a fund is earning and
    what it is paying out.

(2) There can be no assurance that the Adviser will continue the
    waivers/reimbursements if the Reorganization is not completed.

The total returns, yields and distribution rates are not necessarily indicative
of future results. The performance of an investment company is the result of
conditions in the securities markets, portfolio management and operating
expenses. Although information such as that shown above is useful in reviewing a
fund's performance and in providing some basis for comparison with other
investment alternatives, it should not be used for comparison with other
investments using different reinvestment assumptions or time periods. In the
absence of expense reimbursements for the Surviving Fund and the Fund, the total
returns, yields and distribution rates would have been reduced.

Investment Adviser. The Surviving Fund and the Fund are both managed by the
Adviser. The Adviser is a wholly owned subsidiary of Nuveen Investments
("Nuveen"). Nuveen is the sponsor and principal underwriter of both Fund's
shares and has sponsored or underwritten more than $60 billion of investment
company securities. Nuveen and its affiliates currently have more than $50
billion in assets under management. Today it offers a broad range of quality
investments designed for individuals seeking to build and maintain wealth.
Founded in 1898, Nuveen is a subsidiary of The John Nuveen Company which, in
turn, is approximately 77% owned by The St. Paul Companies, Inc. ("St. Paul").
St. Paul is located in St. Paul, Minnesota and is principally engaged in
providing property liability insurance through subsidiaries. The Adviser's
principal office is located at 333 West Wacker Drive, Chicago, Illinois 60606.

Advisory and Other Fees. The contractual advisory fees of the Surviving Fund are
the same as those of the Fund. Pursuant to an investment management agreement
between the Adviser and the Trust, the Surviving Fund and the Fund pay the
Adviser annual management fees at the rates set forth below:

<TABLE>
---------------------------------------------------
                                     SURVIVING FUND
AVERAGE DAILY NET ASSETS             MANAGEMENT FEE
---------------------------------------------------
<S>                                  <C>
For the first $125 million               0.5000%
For the next $125 million                0.4875
For the next $250 million                0.4750
For the next $500 million                0.4625
For the next $1 billion                  0.4500
For net assets over $2 billion           0.4250
---------------------------------------------------
</TABLE>

For the fiscal year ended April 30, 2000, the Surviving Fund paid the Adviser
$12,494,246 for advisory services. For the fiscal year ended April 30, 2000, the
Fund paid the Adviser $113,586 for advisory services (after expense
reimbursement) and would have paid $303,770 (assuming no expense reimbursement).
For a complete description of the advisory services provided to the Funds, see
the Surviving Fund and the Fund Summaries in the Funds' Prospectus and the
sections of the Funds' Prospectus and Statement of Additional Information
entitled "Fund Service Providers Investment Adviser" and "Investment Adviser and
Investment Management Agreement," respectively.

For the Fund, the Adviser is currently voluntarily waiving some or all of its
fees or reimbursing certain expenses. After these waivers/reimbursements, the
net operating expenses of the Surviving Fund are lower than those of the Fund.
However, there can be no assurance that such waivers or reimbursements will
continue for the Fund if the Reorganization is not completed.

The Surviving Fund and the Fund have adopted similar distribution and service
plans (the "Distribution and Service Plans") pursuant to Rule 12b-1 under the
1940 Act. The Distribution and Service Plans authorize each Fund to pay Nuveen
an annual 0.20% service fee on the average daily net assets of Class A and C
shares outstanding. The plans also authorize each Fund to pay Nuveen an annual
0.55% distribution fee on the average daily net assets of Class C shares
outstanding. In order to help compensate Nuveen for the sales commissions paid
to financial advisors at the time of sale of Class C shares, Nuveen retains the
first year's service and distribution fees on sales of Class C shares. After the
first year, Nuveen pays these fees to the broker of record. The distributor of
the Funds' shares is Nuveen. For a complete description of these arrangements
with respect to the Surviving Fund, see the sections of the Funds' Prospectuses
and Statement of Additional Information entitled "Fund Service Providers -- The
Distributor" and "Distribution and Service Plan," respectively.

The tables below set forth (i) the fees and expenses paid by the Surviving Fund
and the Fund during the fiscal year ended April 30, 2000 and (ii) pro-forma
expenses for the combined fund for Class A, C and R shares. Shareholders of the
Fund can expect that the fees they pay will go up slightly.

 4
<PAGE>   10

                            EXPENSE COMPARISON TABLE
                                 CLASS A SHARES

<TABLE>
<CAPTION>
----------------------------------------------------------------------------------------------------------
                                                              SURVIVING         THE
                                                                FUND            FUND         PRO-FORMA (1)
----------------------------------------------------------------------------------------------------------
<S>                                                           <C>           <C>              <C>
SHAREHOLDER TRANSACTION EXPENSES
Maximum Sales Charge Imposed on Purchases (as a percentage
  of Offering Price)(2)                                           4.20%             3.00%             3.00%
Contingent Deferred Sales Charge (CDSC) (as a percentage of
  the lower of the original purchase price or redemption
  proceeds)(2)                                                    none              none              none
ANNUAL FUND OPERATING EXPENSES (3)
Management Fees                                                    .45%              .50%              .45%
Rule 12b-1 Fees                                                    .20%              .20%              .20%
Other Expenses                                                     .15%              .36%              .15%
                                                              --------      ------------     -------------
Total Gross Fund Operating Expenses (before waivers and
  reimbursements)                                                  .80%             1.06%              .80%
                                                              --------      ------------     -------------
Total Net Fund Operating Expenses (after waivers and
  reimbursements)                                                  .79%              .74%              .79%
EXPENSE EXAMPLE OF TOTAL OPERATING EXPENSES ASSUMING
  REDEMPTION AT THE END OF THE PERIOD (4)
One Year                                                      $    498      $        405     $         379
Three Years                                                   $    665      $        627     $         548
Five Years                                                    $    846      $        867     $         731
Ten Years                                                     $  1,368      $      1,555     $       1,260
----------------------------------------------------------------------------------------------------------
</TABLE>

Notes to Expense Comparison Table

(1) The Pro-Forma column reflects expenses estimated to be paid on new shares
    purchased from the Surviving Fund subsequent to the Reorganization and
    reflects the effect of the Reorganization. At the time of the
    Reorganization, the Surviving Fund's maximum sales charge imposed on
    purchases (as a percentage of Offering Price) will be reduced to 3.00%.

(2) The sales charge may be reduced or waived based on the amount of purchase or
    for certain eligible categories of investors. A CDSC of 1% is imposed on
    redemptions of certain purchases of $1 million or more within 18 months of
    purchase.

(3) There can be no assurance that any of the voluntary waivers or
    reimbursements will continue for the Fund if the Reorganization is not
    completed.

(4) Expense examples reflect what an investor would pay on a $10,000 investment,
    assuming a 5% annual return and reinvestment of all dividends, based on
    total fund operating expenses before waivers and reimbursements. Actual
    returns will differ.

 5
<PAGE>   11

                            EXPENSE COMPARISON TABLE
                                 CLASS C SHARES

<TABLE>
<CAPTION>
-------------------------------------------------------------------------------------------------------------
                                                             SURVIVING        THE
                                                               FUND           FUND        PRO-FORMA (1)
-------------------------------------------------------------------------------------------------------------
<S>                                                          <C>          <C>             <C>             <C>
SHAREHOLDER TRANSACTION EXPENSES
Maximum Sales Charge Imposed on Purchases                       none           none            none
Contingent Deferred Sales Charge (CDSC) (as a percentage of
  the lower of the original purchase price or redemption
  proceeds) (2)                                                 1.00%          1.00%           1.00%
ANNUAL FUND OPERATING EXPENSES (3) (as a percentage of
  average net assets)
Management Fees                                                  .45%           .50%            .45%
Rule 12b-1 Fees                                                  .75%           .75%            .75%
Other Expenses                                                   .15%           .37%            .15%
                                                              ------         ------          ------
Total Gross Fund Operating Expenses (before waivers and
  reimbursements)                                               1.35%          1.62%           1.35%
                                                              ------         ------          ------
Total Net Fund Operating Expenses (after waivers and
  reimbursements)                                               1.34%          1.29%           1.34%
EXPENSE EXAMPLE OF TOTAL OPERATING EXPENSES ASSUMING
  REDEMPTION AT THE END OF THE PERIOD (4)
One Year                                                      $  137         $  165          $  137
Three Years                                                   $  428         $  511          $  428
Five Years                                                    $  739         $  881          $  739
Ten Years                                                     $1,624         $1,922          $1,624
-------------------------------------------------------------------------------------------------------
</TABLE>

Notes to Expense Comparison Table

(1) The Pro-Forma column reflects expenses estimated to be paid on new shares
    purchased from the Surviving Fund subsequent to the Reorganization and
    reflects the effect of the Reorganization.

(2) Imposed only on redemptions within 12 months of purchase.

(3) There can be no assurance that any of the voluntary waivers or
    reimbursements will continue for the Fund if the Reorganization is not
    completed.

(4) Expense examples reflect what an investor would pay on a $10,000 investment,
    assuming a 5% annual return and reinvestment of all dividends and
    distributions, based on total fund operating expenses before waivers and
    reimbursements. Actual returns will differ.

                            EXPENSE COMPARISON TABLE
                                 CLASS R SHARES

<TABLE>
<CAPTION>
-------------------------------------------------------------------------------------------------------------
                                                             SURVIVING        THE
                                                               FUND           FUND        PRO-FORMA (1)
-------------------------------------------------------------------------------------------------------------
<S>                                                          <C>          <C>             <C>             <C>
SHAREHOLDER TRANSACTION EXPENSES
Maximum Sales Charge Imposed on Purchases                       none           none            none
Contingent Deferred Sales Charge (CDSC) (as a percentage of
  the lower of the original purchase price or redemption
  proceeds)                                                     none           none            none
ANNUAL FUND OPERATING EXPENSES (2) (as a percentage of
  average net assets)
Management Fees                                                  .45%           .50%            .45%
Rule 12b-1 Fees                                                   --             --              --
Other Expenses                                                   .14%           .37%            .14%
                                                              ------         ------          ------
Total Gross Fund Operating Expenses (before waivers and
  reimbursements)                                                .59%           .87%            .59%
                                                              ------         ------          ------
Total Net Fund Operating Expenses (after waivers and
  reimbursements)                                                .59%           .54%            .59%
EXPENSE EXAMPLE OF TOTAL OPERATING EXPENSES ASSUMING
  REDEMPTION AT THE END OF THE PERIOD (3)
One Year                                                      $   60         $   89          $   60
Three Years                                                   $  189         $  278          $  189
Five Years                                                    $  329         $  482          $  329
Ten Years                                                     $  738         $1,073          $  738
-------------------------------------------------------------------------------------------------------
</TABLE>

Notes to Expense Comparison Table

(1) The Pro-Forma column reflects expenses estimated to be paid on new shares
    purchased from the Surviving Fund subsequent to the Reorganization and
    reflects the effect of the Reorganization.

(2) There can be no assurance that any of the voluntary waivers or
    reimbursements will continue for the Fund if the Reorganization is not
    completed.

(3) Expense examples reflect what an investor would pay on a $10,000 investment,
    assuming a 5% annual return and reinvestment of all dividends and
    distributions, based on total fund operating expenses before waivers and
    reimbursements. Actual returns will differ.

 6
<PAGE>   12

Distribution, Purchase, Valuation, Redemption and Exchange of Shares. The
Surviving Fund offers four (4) classes of shares and the Fund offers three (3)
classes of shares. The Class A shares of the Surviving Fund and the Fund are
subject to an initial sales charge and a 0.20% annual service fee. At the time
of the Reorganization the sales charges and commissions of the Surviving Fund
will be reduced so that the same Class A sales charges and commissions will
apply to the Surviving Fund and the Fund as indicated by the following table.

                     CLASS A SALES CHARGES AND COMMISSIONS
--------------------------------------------------------------------------------

<TABLE>
<CAPTION>
                                                                                                       AUTHORIZED
                                                                                                         DEALER
                                                                      SALES CHARGE                     COMMISSION
                                                           -----------------------------------       --------------
                                                           AS % OF PUBLIC        AS % OF YOUR        AS % OF PUBLIC
                  PURCHASE AMOUNT                          OFFERING PRICE       NET INVESTMENT       OFFERING PRICE
-------------------------------------------------------------------------------------------------------------------
<S>                                                        <C>                  <C>                  <C>
Less than $50,000                                               3.00%                3.09%                2.50%
$50,000 but less than $100,000                                  2.50                 2.56                 2.00
$100,000 but less than $250,000                                 2.00                 2.04                 1.50
$250,000 but less than $500,000                                 1.50                 1.52                 1.25
$500,000 but less than $1,000,000                               1.25                 1.27                 1.00
$1,000,000 and over                                               --                   --                 0.75
-------------------------------------------------------------------------------------------------------------------
</TABLE>

The initial sales charge applicable to Class A shares of the Surviving Fund will
be waived for Class A shares acquired in the Reorganization. Any subsequent
purchases of Class A shares of the Surviving Fund after the Reorganization will
be subject to the initial sales charge, excluding Class A shares purchased
through the dividend reinvestment plan.

The Fund does not offer Class B shares. The Surviving Fund offers Class B shares
which do not incur a sales charge when purchased, but are each subject to a .20%
annual service fee and a .75% annual distribution fee. Class B shares are also
subject to a maximum CDSC of 5% if redeemed within the first year after purchase
and subject to a declining schedule thereafter. Fund shareholders will have the
ability to purchase Class B shares after the Reorganization.

The Class C shares of the Surviving Fund and the Fund do not incur a sales
charge when purchased, but each are subject to a .20% annual service fee and a
 .55% annual distribution fee. Class C shares are also subject to a CDSC of 1.00%
if redeemed within the first year after purchase.

Class R shares of the Surviving Fund and the Fund have no sales charges or
ongoing fees. For a complete description of the Class A, B, C and R shares, see
the sections of the Funds' Prospectus and Statement of Additional Information
entitled "Section 3 -- How You Can Buy and Sell Shares" and "Additional
Information on the Purchase and Redemption of Fund Shares," respectively.

No contingent deferred sales charge will be imposed on Class C shares of the
Fund in connection with the Reorganization. The holding period and conversion
period for Class C shares of the Surviving Fund received in connection with the
Reorganization will be measured from the earlier of the time (i) the holder
purchased such shares from the Fund or (ii) the holder purchased such shares
from any other Nuveen fund and subsequently exchanged them for shares of the
Fund.

Shares of the Surviving Fund and the Fund may be purchased through a financial
advisor, by check, by electronic transfer, and by exchange from certain other
funds distributed by Nuveen. For a complete description regarding purchase of
shares and exchange of shares of the Surviving Fund and the Fund, see the
sections of the Funds' Prospectus and Statement of Additional Information
entitled "Section 3 -- How You Can Buy and Sell Shares" and "Additional
Information on the Purchase and Redemption of Fund Shares," respectively.

Shares of the Surviving Fund and the Fund properly presented for redemption may
be redeemed or exchanged at the next determined net asset value per share
(subject to any applicable deferred sales charge). NUVEEN WILL WAIVE ANY
DEFERRED SALES CHARGE THAT WOULD OTHERWISE APPLY TO A REDEMPTION OR EXCHANGE OF
FUND SHARES MADE PRIOR TO THE REORGANIZATION. Shares of either the Surviving
Fund or the Fund may be redeemed or exchanged through a financial advisor by
mail or by special redemption privileges (telephone exchange, telephone
redemption, by check or by electronic transfer). If any shares of the Surviving
Fund or the Fund were purchased less than 10 days prior to your request, the
Funds will not mail the redemption proceeds until the check for the purchase has
cleared, which can take up to 10 days. In addition, the Surviving Fund and the
Fund may suspend redemptions or delay payment on redemptions for more than seven
days (three days for street name accounts) in certain extraordinary
circumstances as described in the Funds' Statement of Additional Information. In
order to limit excessive exchange activity and in other circumstances where the
Adviser believes doing so would be in the best interests of a fund, the
Surviving Fund and the Fund reserve the right to revise or terminate the
exchange privilege, limit the amount or number of exchanges, or reject any
exchange. Shareholders are notified in the event this happens to the extent
required by law.

No further purchases of the shares of the Fund may be made after the date on
which the shareholders of the Fund approve the Reorganization, and the stock
transfer books of the Fund will be permanently closed as of the date of Closing.
Only redemption requests and transfer instructions received in proper form by
the close of business on the day prior to the date of

 7
<PAGE>   13

Closing will be fulfilled by the Fund. Redemption requests or transfer
instructions received by the Fund after that date will be treated by the Fund as
requests for the redemption or instructions for transfer of the shares of the
Surviving Fund credited to the accounts of the shareholders of the Fund.
Redemption requests or transfer instructions received by the Fund after the
close of business on the day prior to the date of Closing will be forwarded to
the Surviving Fund. For a complete description of the redemption arrangements
for the Funds, see the sections of the Funds' Prospectus entitled "How you can
buy and sell shares -- How to Sell Shares."

Capitalization. The following table sets forth the capitalization of the
Surviving Fund and the Fund as of June 30, 2000, and the pro-forma
capitalization of the Surviving Fund as if the Reorganization had occurred on
that date. These numbers may differ at the time of Closing.

                    CAPITALIZATION TABLE AS OF JUNE 30, 2000
--------------------------------------------------------------------------------

<TABLE>
<CAPTION>
-------------------------------------------------------------------------------------------------------------
                                                                SURVIVING           THE
                                                                   FUND            FUND        PRO-FORMA (1)
-------------------------------------------------------------------------------------------------------------
<S>                                                           <C>               <C>            <C>
NET ASSETS
    Class A                                                   $  118,252,505    $43,222,377    $  161,391,567
    Class B                                                       11,472,936            N/A        11,472,936
    Class C                                                        7,091,648     10,283,494        17,355,320
    Class R                                                    2,507,755,032        677,297     2,508,431,023
                                                              --------------    -----------    --------------
         Total                                                $2,644,572,121    $54,183,168    $2,698,650,846
                                                              ==============    ===========    ==============
NET ASSET VALUE PER SHARE
    Class A                                                   $         9.00    $     10.16    $         9.00
    Class B                                                             9.00            N/A              9.00
    Class C                                                             8.99          10.18              8.99
    Class R                                                             9.00          10.16              9.00
SHARES OUTSTANDING
    Class A                                                       13,142,094      4,253,143        17,935,323
    Class B                                                        1,274,543            N/A         1,274,543
    Class C                                                          788,746      1,010,237         1,930,422
    Class R                                                      278,486,360         66,688       278,561,470
                                                              --------------    -----------    --------------
         Total                                                   293,691,743      5,330,068       299,701,758
                                                              ==============    ===========    ==============
SHARES AUTHORIZED
    Class A shares                                                 Unlimited      Unlimited         Unlimited
    Class B shares                                                 Unlimited            N/A         Unlimited
    Class C shares                                                 Unlimited      Unlimited         Unlimited
    Class R shares                                                 Unlimited      Unlimited         Unlimited
-------------------------------------------------------------------------------------------------------------
</TABLE>

(1)  The pro-forma figures reflect the effect of the Reorganization.
N/A The Fund does not issue Class B Shares.

 8
<PAGE>   14

B. RISK FACTORS

SIMILARITIES OF RISKS

The investment objectives of the Surviving Fund and the Fund are substantially
identical. The investment policies of the Funds are substantially the same
insofar as they may purchase only quality municipal bonds that are either rated
investment grade (AAA/Aaa to BBB/Baa) by independent rating agencies at the time
of purchase or are nonrated but judged to be investment grade by the Adviser.

The Funds may purchase municipal bonds that represent lease obligations. These
carry special risks because the issuer of the bonds may not be obligated to
appropriate money annually to make payments under the lease. In order to reduce
this risk, the Funds may only purchase leases where the issuer has a strong
incentive to continue making appropriations until maturity. The Funds also
engage in certain common investment practices such as the purchase and sale of
securities on a "when-issued" and "delayed delivery" basis. In addition, the
Funds may periodically engage in hedging transactions as described in the
sections of the Funds' Statement of Additional Information entitled "Investment
Policies and Investment Portfolio -- Hedging and Other Defensive Actions." To
the extent that the investment objectives and investment policies and practices
are substantially the same, the risks associated with an investment in the Funds
are substantially the same.

The Funds invest at least 80% of their total assets in municipal securities. For
a general description of the risks involved in investing in municipal bonds, see
the sections of the Funds' Statement of Additional Information entitled
"Portfolio Securities," and of the Funds' Prospectus entitled "What the Risks
Are."

The Surviving Fund and the Fund may also invest a substantial portion of their
assets in securities that are subject to the federal alternative minimum tax. As
with the Fund, the Surviving Fund may not be a suitable investment for
shareholders subject to the federal alternative minimum tax.

Investment in either the Surviving Fund or the Fund may not be appropriate for
all investors. The Funds are not intended to be a complete investment program,
and investors should consider their long-term investment goals and financial
needs when making an investment decision with respect to the Funds. An
investment in either Fund is intended to be a long-term investment and should
not be used as a trading vehicle.

DIFFERENCES IN RISKS

The Surviving Fund and the Fund engage in some dissimilar investment practices.
To the extent that the investment practices of the Funds differ, the risks
associated with an investment in the Surviving Fund are different from the risks
associated with an investment in the Fund. An investment in the Surviving Fund
may not be appropriate for all Fund's shareholders. For a complete description
of the risks of an investment in the Surviving Fund or the Fund, see the
sections in the Funds' Prospectus entitled "What the Risks Are."

Maturity and Duration. Both Funds maintain price volatility (as measured by
weighted average portfolio duration) characteristic of intermediate-term bond
funds, but each seeks to do so in a different way. The Fund does so by limiting
the weighted average maturity of its investment portfolio under normal market
conditions to between 5 and 10 years. The Surviving Fund does not limit the
weighted average maturity of its investment portfolio, but instead limits the
weighted average duration of its investment portfolio under normal market
conditions to between 4.5 and 7 years in order to be classified as an
intermediate fund. In evaluating the Reorganization, each Fund shareholder
should consider the differences between these two approaches. For a comparison
of the Funds' average portfolio maturity and duration, including pro-forma
figures, see "Comparison of the Surviving Fund with the Fund -- Maturity and
Duration" above. Both dollar-weighted average maturity and duration reflect the
sensitivity of a fund to interest rate fluctuations, whereby a fund with a
longer maturity and duration reacts more strongly to interest rate changes than
a fund with a shorter maturity and duration. The average dollar-weighted
maturity of a fund is the dollar-weighted average of the stated maturities of
all debt instruments held by the fund. Duration is the weighted present value of
principal and interest payments expressed in years and may measure the
sensitivity of a fund's net asset value to incremental changes in interest rates
more accurately than average maturity. For example, a fund with a duration of
5.0 years should have about half the interest rate sensitivity of a fund with a
duration of 10.0 years, because the fund with the shorter duration will receive
payments (and can reinvest at prevailing interest rates) twice as quickly (on
average).

C. THE PROPOSED REORGANIZATION

The material features of the Agreement are summarized below. This summary does
not purport to be complete and is subject in all respects to the provisions of,
and is qualified in its entirety by reference to, the Agreement attached as
Appendix A to the Reorganization SAI, a copy of which may be obtained without
charge by calling the Funds at (800) 621-7227 and asking for the "Reorganization
SAI."

 9
<PAGE>   15

TERMS OF THE AGREEMENT

Pursuant to the Agreement, the Surviving Fund will acquire all of the assets and
the liabilities of the Fund on the date of the Closing in consideration for
Class A, C and R shares of the Surviving Fund.

Subject to the Fund's shareholders approving the Reorganization, the closing
(the "Closing") will occur October 27, 2000 or such later date as soon as
practicable thereafter as the Surviving Fund and the Fund may mutually agree.

On the date of the Closing, the Fund will transfer to the Surviving Fund all of
its assets and liabilities. The Surviving Fund will in turn transfer to the Fund
a number of its Class A, C and R shares equal in value to the value of the net
assets of the Fund, transferred to the Surviving Fund as of the date of the
Closing, as determined in accordance with the valuation method described in the
Surviving Fund's then current prospectus. In order to minimize any potential for
undesirable federal income and excise tax consequences in connection with the
Reorganization, the Surviving Fund and the Fund may individually distribute on
or before the Closing all or substantially all of their respective undistributed
net investment income (including net capital gains) as of such date.

The Fund will distribute in complete liquidation the Class A, C and R shares of
the Surviving Fund to the shareholders of the respective class of the Fund
promptly after the Closing and then will be liquidated, dissolved and terminated
as a series of the Trust in accordance with the Trust's Declaration of Trust.

The Fund has made certain standard representations and warranties to the
Surviving Fund regarding its capitalization, status and conduct of business.

Unless waived in accordance with the Agreement, the obligations of the parties
to the Agreement are conditioned upon, among other things:

        A. the approval of the Reorganization by shareholders of the Fund;

        B. the absence of any rule, regulation, order, injunction or proceeding
           preventing or seeking to prevent the consummation of the transactions
           contemplated by the Agreement;

        C. the receipt of all necessary approvals, registrations and exemptions
           under federal and state laws;

        D. the truth in all material respects as of the Closing of the
           representations and warranties of the parties and performance and
           compliance in all material respects with the parties' agreements,
           obligations and covenants required by the Agreement;

        E.  the effectiveness under applicable law of the registration statement
            of the Surviving Fund of which this Prospectus/Proxy Statement forms
            a part and the absence of any stop orders under the Securities Act
            of 1933, as amended, pertaining thereto; and

        F.  the receipt of opinions of counsel relating to, among other things,
            the tax-free nature of the Reorganization for federal income tax
            purposes.

The Agreement may be terminated or amended with respect to a Reorganization by
the mutual consent of the parties either before or after approval thereof by the
shareholders of the Fund, provided that no such amendment after such approval
shall be made if it would have a material adverse affect on the interests of the
Fund's shareholders. The Agreement also may be terminated by the non-breaching
party if there has been a material misrepresentation, material breach of any
representation or warranty, material breach of contract or failure of any
condition to Closing.

THE BOARD RECOMMENDS THAT YOU VOTE TO APPROVE THE REORGANIZATION, AS IT BELIEVES
THE REORGANIZATION IS IN THE BEST INTERESTS OF THE FUND AND THAT THE INTERESTS
OF EXISTING SHAREHOLDERS WILL NOT BE DILUTED AS A RESULT OF CONSUMMATION OF THE
PROPOSED REORGANIZATION.

DESCRIPTION OF SECURITIES TO BE ISSUED

Shares of Beneficial Interest. Beneficial interests in the Surviving Fund being
offered hereby are represented by transferable Class A, C and R shares, par
value $0.01 per share. The Declaration of Trust of the Trust permits the
trustees, as they deem necessary or desirable, to create one or more separate
investment portfolios and to issue a separate series of shares for each
portfolio and, subject to compliance with the 1940 Act, to further subdivide the
shares of a series into one or more classes of shares for such portfolio.

Voting Rights of Shareholders. Holders of shares of the Surviving Fund are
entitled to one vote per share on matters as to which they are entitled to vote;
however, separate votes generally are taken by each series on matters affecting
an individual series.

The Surviving Fund operates as a series of the Trust, an open-end management
investment company registered with the SEC under the 1940 Act. In addition to
the specific voting rights described above, shareholders of the Surviving Fund
are entitled, under current law, to vote on certain other matters, including
changes in fundamental investment policies and restrictions
 10
<PAGE>   16

and the ratification of the selection of independent auditors. Moreover, under
the 1940 Act, shareholders owning not less than 10% of the outstanding shares of
the Trust may request that the board of trustees call a shareholders' meeting
for the purpose of voting upon the removal of trustee(s).

CONTINUATION OF SHAREHOLDER ACCOUNTS AND PLANS; SHARE CERTIFICATES

If the Reorganization is approved, the Surviving Fund will establish an account
for each shareholder of the Fund containing the appropriate number of shares of
the appropriate class of the Surviving Fund. The shareholder services and
shareholder programs of the Surviving Fund and the Fund are substantially
identical.

Shareholders of the Fund who are accumulating shares of the Fund under the
dividend reinvestment plan, or who are receiving payment under the systematic
withdrawal plan with respect to shares of the Fund, will retain the same rights
and privileges after the Reorganization in connection with the Surviving Fund
Class A, C or R shares received in the Reorganization through substantially
identical plans maintained by the Surviving Fund. Chase Manhattan Bank,
custodian for the Fund, serves as the custodian for the assets of the Surviving
Fund.

Upon approval of the Reorganization, shareholders of the Fund who currently own
shares in certificate form are asked to surrender these shares to the Fund's
transfer agent, Chase Global Funds Services, P.O. Box 5186, NY, NY 10274. Fund
shareholders must submit a written request to Chase in order to receive
certificates for their Surviving Fund shares. No certificates for Surviving Fund
shares will be issued as part of the Reorganization except upon request.

CERTAIN FEDERAL INCOME TAX CONSEQUENCES

The following is a general discussion of the material federal income tax
consequences of the Reorganization to shareholders of the Fund and shareholders
of the Surviving Fund. The discussion set forth below is for general information
only and may not apply to a holder subject to special treatment under the
Internal Revenue Code of 1986, as amended (the "Code"), such as a holder that is
a bank, an insurance company, a dealer in securities, a tax-exempt organization,
or a foreign person, or that acquired its Class A, C and R shares of the Fund
pursuant to the exercise of employee stock options or otherwise as compensation.
It is based upon the Code, legislative history, Treasury regulations, judicial
authorities, published positions of the Internal Revenue Service (the "Service")
and other relevant authorities, all as in effect on the date hereof and all of
which are subject to change or different interpretations (possibly on a
retroactive basis). This summary is limited to shareholders who hold their Fund
shares as capital assets. No advance rulings have been or will be sought from
the Service regarding any matter discussed in this Prospectus/Proxy Statement.
Accordingly, no assurances can be given that the Service could not successfully
challenge the intended federal income tax treatment described below.
Shareholders should consult their own tax advisers to determine the specific
federal income tax consequences of all transactions relating to the
Reorganization, as well as the effects of state, local and foreign tax laws and
possible changes to the tax laws.

The Reorganization is intended to qualify as a "reorganization" within the
meaning of Section 368(a)(1) of the Code. It is a condition to the Closing of
the Reorganization that the Trust and the Fund receive an opinion from Morgan,
Lewis & Bockius LLP ("Morgan Lewis") substantially to the effect that for
federal income tax purposes:

        A. The acquisition by the Surviving Fund of the assets of the Fund in
           exchange solely for Class A, C and R shares of the Surviving Fund and
           the assumption by the Surviving Fund of the liabilities of the Fund
           will qualify as tax-free reorganization within the meaning of Section
           368(a)(1)(c) of the Code.

        B. No gain or loss will be recognized by the Fund or the Surviving Fund
           upon the transfer to the Surviving Fund of the assets of the Fund in
           exchange solely for the Class A, C and R shares of the Surviving Fund
           and the assumption by the Surviving Fund of the liabilities of the
           Fund.

        C. The Surviving Fund's basis in the Fund's assets received in the
           Reorganization will equal the basis of such assets in the hands of
           the Fund immediately prior to the transfer, and the Surviving Fund's
           holding period of such assets will, in each instance, include the
           period during which the assets were held by the Fund.

        D. No gain or loss will be recognized by the shareholders of the Fund
           upon the exchange of their shares of the Fund for the Class A, C and
           R shares of the Surviving Fund.

        E.  The aggregate tax basis in the Class A, C and R shares of the
            Surviving Fund received by the shareholders of the Fund will be the
            same as the aggregate tax basis of the shares of the Fund
            surrendered in exchange therefor.

        F.  The holding period of the Class A, C and R shares of the Surviving
            Fund received by the shareholders of the Fund will include the
            holding period of the shares of the Fund surrendered in exchange
            therefor provided such surrendered shares of the Fund are held as
            capital assets by such shareholder.

In rendering its opinions, Morgan Lewis will rely upon certain representations
of the management of the Surviving Fund and the Fund and assume that the
Reorganization will be consummated as described in the Agreement and that
redemptions of

 11
<PAGE>   17

shares of the Fund occurring prior to the Closing and post-Closing redemption of
shares of the Surviving Fund that are received in the Reorganization will
consist solely of redemptions in the ordinary course of business.

The Surviving Fund intends to be taxed under the rules applicable to regulated
investment companies as defined in Section 851 of the Code, which are the same
rules currently applicable to the Fund and its shareholders.

EXPENSES

Because the benefits of the Reorganization are anticipated to accrue almost
exclusively to shareholders of the Fund, the Fund will pay all of the costs
associated with the Reorganization. Management of the Fund estimates that
expenses for the Reorganization will equal approximately $85,000. In addition,
separate from the Reorganization, the Adviser has agreed to waive its right to
seek reimbursement from the Fund for any remaining unamortized organizational
expenses.

The Board of the Trust has determined that the foregoing arrangement with
respect to expenses is fair and reasonable.

As noted above, shareholders of the Fund may redeem their shares or exchange
their shares for shares of certain other funds distributed by Nuveen at any time
prior to the closing of the Reorganization. See "Distribution, Purchase,
Valuation, Redemption and Exchange of Shares" above. Redemptions and exchanges
of shares generally are taxable transactions for federal income tax purposes,
unless your shares are held in an account that is not subject to taxation, such
as an individual retirement account or other tax-qualified retirement plan.
Shareholders should consult with their own tax advisers regarding the federal,
state and local tax consequences of potential transactions.

LEGAL MATTERS

Morgan, Lewis & Bockius LLP, 1800 M Street, N.W., Washington, DC 20036 will pass
on certain legal matters concerning the federal income tax consequences of the
Reorganization and issuance of Class A, C and R shares of the Surviving Fund.

FINANCIAL STATEMENTS

For condensed financial information for the Surviving Fund and the Fund, see
"Financial Highlights" in the Funds' Prospectus and Exhibit A to this
Prospectus/Proxy Statement.

In addition, incorporated by reference in their respective entireties are the
audited financial statements for the fiscal year ended April 30, 2000 for the
Surviving Fund and the Fund attached as Exhibit C to the Reorganization SAI.

D. RECOMMENDATION OF THE BOARD

The Board of the Trust has unanimously approved the Agreement and has determined
that participation in the Reorganization is in the best interests of the Fund.
THE BOARD OF TRUSTEES UNANIMOUSLY RECOMMENDS THAT SHAREHOLDERS VOTE "FOR" THE
PROPOSED REORGANIZATION.

 12
<PAGE>   18

E. OTHER INFORMATION

SHAREHOLDERS OF THE SURVIVING FUND AND THE FUND

At the close of business on August 15, 2000, the record date with respect to the
Special Meeting, there were 13,183,011 Class A shares, 1,304,690 Class B shares,
792,183 Class C shares and 277,758,085 Class R shares, respectively, of the
Surviving Fund. As of August 9, 2000, the trustees and officers of the Surviving
Fund as a group own less than 1% of the shares of the Surviving Fund. The
following table sets forth the percentage of each person who, as of August 9,
2000, owns of record, or is known by the Trust to own of record or beneficially
own 5% or more of any class of shares of the Surviving Fund.

<TABLE>
<CAPTION>
------------------------------------------------------------------------------------------------------
CLASS                     NAME AND ADDRESS OF OWNER                      PERCENTAGE OF CLASS OWNERSHIP
------------------------------------------------------------------------------------------------------
<C>      <S>                                                             <C>
 B       MLPF&S FOR THE SOLE BENEFIT OF ITS CUSTOMERS                               22.01%
         ATTN FUND ADMIN SEC 97AF2
         4800 DEER LAKE DR E FL 3
         JACKSONVILLE FL 32246-6484
 C       MLPF&S FOR THE SOLE BENEFIT OF ITS CUSTOMERS                               16.70%
         ATTN FUND ADMIN SEC 97AF2
         4800 DEER LAKE DR E FL 3
         JACKSONVILLE FL 32246-6484
 C       DONALDSON LUFKIN JENRETTE                                                   5.96%
         SECURITIES CORPORATION INC
         P O BOX 2052
         JERSEY CITY NJ 07303-9998
</TABLE>

At the close of business on August 15, 2000, the record date with respect to the
Special Meeting of shareholders of the Fund, there were 4,237,849 Class A
shares, 990,541 Class C shares and 66,212 Class R shares, respectively, of the
Fund. As of August 9, 2000, the trustees and officers of the Fund as a group own
less than 1% of the outstanding shares of the Fund. The following table sets
forth the percentage of each person who, as of August 9, 2000, owns of record,
or is known by the Trust to own of record or beneficially own 5% or more of any
class of shares of the Fund.

<TABLE>
<CAPTION>
------------------------------------------------------------------------------------------------------
CLASS                     NAME AND ADDRESS OF OWNER                      PERCENTAGE OF CLASS OWNERSHIP
------------------------------------------------------------------------------------------------------
<C>      <S>                                                             <C>
 A       MLPF&S FOR THE SOLE BENEFIT OF ITS CUSTOMERS                               26.81%
         ATTN FUND ADMIN SEC 97AF2
         4800 DEER LAKE DR E FL 3
         JACKSONVILLE FL 32246-6484
 A       WACHOVIA SECURITIES INC                                                     5.42%
         FBO 315-28609-16
         P O BOX 1220
         CHARLOTTE NC 28201-1220
 C       MLPF&S FOR THE SOLE BENEFIT OF ITS CUSTOMERS                               41.57%
         ATTN FUND ADMIN SEC 97AF2
         4800 DEER LAKE DR E FL 3
         JACKSONVILLE FL 32246-6484
 R       PATRICIA G DIEMER                                                          58.33%
         PATRICIA G DIEMER TRUST
         950 HAWTHORNE LN
         NORTHBROOK IL 60062-3417
 R       MLPF&S FOR THE SOLE BENEFIT OF ITS CUSTOMERS                                9.24%
         ATTN FUND ADMIN SEC 97AF2
         4800 DEER LAKE DR E FL 3
         JACKSONVILLE FL 32246-6484
 R       D A DAVIDSON CO INC FBO                                                     8.18%
         R G VAN MOPPES TTEE
         BOX 5015
         GREAT FALLS MT 59403
 R       WALTER R SMITH                                                              6.09%
         EILEEN M SMITH JT WROS
         37 BAY AVE
         EAST MORICHES NY 11940
 R       PAINEWEBBER FOR THE BENEFIT OF LEVIN STAGMAN PARTNERSHIP                    5.96%
         PARTNER
         1970 LAVER COURT
         LOS ALTOS CA 94024-6767
 R       DOROTHY L WEBER AND STERLING L RICE                                         5.49%
         230 WILLOWBROOK CT STE 1
         WILDER KY 41071-3320
</TABLE>

 13
<PAGE>   19

SHAREHOLDER PROPOSALS

As a general matter, the Surviving Fund does not intend to hold future regular
annual or special meetings of its shareholders unless required by the 1940 Act.
In the event the Reorganization is not consummated, the Fund does not intend to
hold future regular annual or special meetings of its shareholders unless
required by the 1940 Act. Any shareholder who wishes to submit proposals for
consideration at a meeting of shareholders of the Surviving Fund or the Fund
should send such proposal to the respective Fund at 333 West Wacker Drive,
Chicago, Illinois 60606. To be considered for presentation at a shareholders'
meeting, rules promulgated by the SEC require that, among other things, a
shareholder's proposal must be received at the offices of the Fund a reasonable
time before a solicitation is made. Timely submission of a proposal does not
necessarily mean that such proposal will be included.

F. VOTING INFORMATION AND REQUIREMENTS

Holders of shares of the Fund are entitled to one vote per share on matters as
to which they are entitled to vote. The Fund does not utilize cumulative voting.

Each valid proxy given by a shareholder of the Fund will be voted by the persons
named in the proxy in accordance with the instructions marked thereon and as the
persons named in the proxy may determine on such other business as may come
before the Special Meeting on which shareholders are entitled to vote. If no
designation is made, the proxy will be voted by the persons named in the proxy
as recommended by the Board "FOR" approval of the Reorganization. Abstentions
and broker non-votes (i.e. shares held by brokers or nominees, typically in
"street name," as to which (i) instructions have not been received from
beneficial owners or persons entitled to vote and (ii) the broker or nominee
does not have discretionary voting power on a particular matter) do not count as
votes "FOR" the proposal and are treated as votes "AGAINST." Thirty percent of
the outstanding shares of the Fund entitled to vote on the proposals must be
present in person or by proxy to have a quorum to conduct business at the
Special Meeting. Abstentions and broker non-votes will be deemed present for
quorum purposes.

Shareholders who execute proxies may revoke them at any time before they are
voted by filing with the Fund a written notice of revocation, by delivering a
duly executed proxy bearing a later date, or by attending the Special Meeting
and voting in person. The giving of a proxy will not affect your right to vote
in person if you attend the Special Meeting and wish to do so.

It is not anticipated that any action will be asked of the shareholders of the
Fund other than as indicated above, but if other matters are properly brought
before the Special Meeting, it is intended that the persons named in the proxy
will vote in accordance with their judgment.

APPROVAL OF THE REORGANIZATION WILL REQUIRE THE FAVORABLE VOTE OF THE HOLDERS OF
A MAJORITY OF THE OUTSTANDING SHARES OF THE FUND ENTITLED TO VOTE.

In the event that sufficient votes in favor of a proposal are not received by
the scheduled time of the Special Meeting, the persons named in the proxy may
propose and vote in favor of one or more adjournments of the Special Meeting to
permit further solicitation of proxies. If sufficient shares were present to
constitute a quorum, but insufficient votes had been cast in favor of a proposal
to approve it, proxies would be voted in favor of adjournment only if the Board
determined that adjournment and additional solicitation was reasonable and in
the best interest of the shareholders of the Fund, taking into account the
nature of the proposal, the percentage of the votes actually cast, the
percentage of negative votes, the nature of any further solicitation that might
be made and the information provided to shareholders about the reasons for
additional solicitation. Any such adjournment will require the affirmative vote
of the holders of a majority of the outstanding shares voted at the session of
the Special Meeting to be adjourned.

Proxies of shareholders of the Fund are solicited by the Board. Additional
solicitation may be made by mail, telephone, telegraph or personal interview by
representatives of the Adviser or Nuveen, or by dealers or their
representatives. In addition, such solicitation servicing may also be provided
by D. F. King, at a cost estimated to be approximately $2,500, plus reasonable
expenses.

September 6, 2000

                 YOUR VOTE IS IMPORTANT AND YOUR PARTICIPATION
              IN THE AFFAIRS OF YOUR FUND DOES MAKE A DIFFERENCE.

                       PLEASE VOTE YOUR SHARES PROMPTLY.

 14
<PAGE>   20

                         FINANCIAL HIGHLIGHTS (AUDITED)                EXHIBIT A

  Selected data for a share outstanding throughout each period is as follows:

NUVEEN INTERMEDIATE DURATION MUNICIPAL BOND FUND (THE "SURVIVING FUND")
<TABLE>
<CAPTION>
CLASS                                           INVESTMENT OPERATIONS              LESS DISTRIBUTIONS
(INCEPTION DATE)                           --------------------------------   ----------------------------
                                                            NET
                                                         REALIZED
                                                            AND                                              ENDING
YEAR                           BEGINNING      NET       UNREALIZED               NET                          NET
ENDED                          NET ASSET   INVESTMENT   INVESTMENT            INVESTMENT   CAPITAL           ASSET      TOTAL
APRIL 30,                        VALUE       INCOME     GAIN (LOSS)   TOTAL     INCOME      GAINS    TOTAL   VALUE    RETURN(A)
-------------------------------------------------------------------------------------------------------------------------------
<S>                            <C>         <C>          <C>           <C>     <C>          <C>       <C>     <C>      <C>
CLASS A (6/95)
  2000                           $9.57        $.45         $(.65)     $(.20)    $(.45)      $(.01)   $(.46)  $8.91      (2.02)%
  1999                            9.46         .45           .13        .58      (.45)       (.02)    (.47)   9.57       6.28
  1998                            9.14         .46           .35        .81      (.46)       (.03)    (.49)   9.46       9.00
  1997(c)                         9.24         .08          (.10)      (.02)     (.08)         --     (.08)   9.14       (.23)
  1997(d)                         9.28         .48            --        .48      (.47)       (.05)    (.52)   9.24       5.26
  1996(e)                         9.15         .34           .14        .48      (.32)       (.03)    (.35)   9.28       5.33
-------------------------------------------------------------------------------------------------------------------------------
CLASS B (2/97)
  2000                            9.57         .39          (.66)      (.27)     (.38)       (.01)    (.39)   8.91      (2.78)
  1999                            9.46         .38           .13        .51      (.38)       (.02)    (.40)   9.57       5.49
  1998                            9.15         .38           .35        .73      (.39)       (.03)    (.42)   9.46       8.09
  1997(c)                         9.24         .09          (.11)      (.02)     (.07)         --     (.07)   9.15       (.25)
  1997(e)                         9.23         .03           .01        .04      (.03)         --     (.03)   9.24        .47
-------------------------------------------------------------------------------------------------------------------------------
CLASS C (6/95)
  2000                            9.57         .40          (.66)      (.26)     (.40)       (.01)    (.41)   8.90      (2.71)
  1999                            9.44         .40           .15        .55      (.40)       (.02)    (.42)   9.57       5.91
  1998                            9.14         .40           .34        .74      (.41)       (.03)    (.44)   9.44       8.20
  1997(c)                         9.23         .07          (.09)      (.02)     (.07)         --     (.07)   9.14       (.21)
  1997(d)                         9.26         .42            --        .42      (.40)       (.05)    (.45)   9.23       4.64
  1996(e)                         9.15         .29           .13        .42      (.28)       (.03)    (.31)   9.26       4.59
-------------------------------------------------------------------------------------------------------------------------------
CLASS R (11/76)
  2000                            9.58         .47          (.66)      (.19)     (.47)       (.01)    (.48)   8.91      (1.93)
  1999                            9.46         .47           .14        .61      (.47)       (.02)    (.49)   9.58       6.59
  1998                            9.15         .48           .34        .82      (.48)       (.03)    (.51)   9.46       9.09
  1997(c)                         9.24         .08          (.09)      (.01)     (.08)         --     (.08)   9.15       (.09)
  1997(d)                         9.28         .49           .01        .50      (.49)       (.05)    (.54)   9.24       5.53
  1996(d)                         9.00         .51           .31        .82      (.51)       (.03)    (.54)   9.28       9.31
-------------------------------------------------------------------------------------------------------------------------------

<CAPTION>
CLASS                                       RATIOS/SUPPLEMENTAL DATA
(INCEPTION DATE)               --------------------------------------------------
                                                         RATIO OF NET
                                             RATIO OF     INVESTMENT
                                 ENDING      EXPENSES       INCOME
YEAR                              NET       TO AVERAGE    TO AVERAGE    PORTFOLIO
ENDED                            ASSETS        NET           NET        TURNOVER
APRIL 30,                        (000)      ASSETS(B)     ASSETS(B)       RATE
-----------------------------
<S>                            <C>          <C>          <C>            <C>
CLASS A (6/95)
  2000                         $  116,621       .80%        5.01%          13%
  1999                            120,418       .77          4.71          12
  1998                             97,029       .80          4.83          10
  1997(c)                          70,331       .77*        5.13*           2
  1997(d)                          68,204       .81          5.11          12
  1996(e)                          37,089       .83*        5.14*          17
-----------------------------
CLASS B (2/97)
  2000                             11,560      1.55          4.27          13
  1999                             10,086      1.52          3.96          12
  1998                              4,136      1.56          4.05          10
  1997(c)                             468     1.53*         4.39*           2
  1997(e)                              43     1.51*         5.23*          12
-----------------------------
CLASS C (6/95)
  2000                              6,920      1.35          4.47          13
  1999                              7,191      1.32          4.15          12
  1998                              4,886      1.35          4.29          10
  1997(c)                           5,360     1.32*         4.58*           2
  1997(d)                           5,039      1.54          4.37          12
  1996(e)                           1,915     1.58*         4.39*          17
-----------------------------
CLASS R (11/76)
  2000                          2,495,259       .59          5.21          13
  1999                          2,834,016       .57          4.90          12
  1998                          2,818,442       .60          5.04          10
  1997(c)                       2,774,648       .57*        5.33*           2
  1997(d)                       2,818,214       .57          5.35          12
  1996(d)                       2,878,641       .59          5.53          17
-----------------------------
</TABLE>

 * Annualized.
(a)Total returns are calculated on net asset value without any sales charge and
   are not annualized.
(b)After waiver of certain management fees or reimbursement of expenses, if
   applicable, by Nuveen Advisory. When custodian for credits are applied, the
   Ratios of Expenses to Average Net Assets for 2000 are .79%, 1.54%, 1.34% and
   .59% for classes A, B, C and R, respectively, and the Ratios of Net
   Investment Income to Average Net Assets for 2000 are 5.02%, 4.28%, 4.48% and
   5.22% for classes A, B, C and R, respectively.
(c)For the two months ended April 30.
(d)For the fiscal year ended February 28/29.
(e)From commencement of class operations as noted through February 28/29.

A- 1
<PAGE>   21

NUVEEN INTERMEDIATE MUNICIPAL BOND FUND(+) (THE "FUND")
<TABLE>
<CAPTION>
CLASS                                         INVESTMENT OPERATIONS              LESS DISTRIBUTIONS
(INCEPTION DATE)                         --------------------------------   ----------------------------
                                                          NET
                                                       REALIZED
                                                          AND                                              ENDING
YEAR                         BEGINNING      NET       UNREALIZED               NET                          NET
ENDED                        NET ASSET   INVESTMENT   INVESTMENT            INVESTMENT   CAPITAL           ASSET      TOTAL
APRIL 30,                      VALUE       INCOME     GAIN (LOSS)   TOTAL     INCOME      GAINS    TOTAL   VALUE    RETURN(A)
-----------------------------------------------------------------------------------------------------------------------------
<S>                          <C>         <C>          <C>           <C>     <C>          <C>       <C>     <C>      <C>
CLASS A (9/92)
  2000                        $11.00        $.50         $(.74)     $(.24)    $(.50)      $(.15)    (.65)  $10.11     (2.17)%
  1999                         10.88         .49           .17        .66      (.50)       (.04)    (.54)   11.00      6.14
  1998                         10.47         .52           .41        .93      (.52)         --     (.52)   10.88      8.97
  1997(c)                      10.27         .47           .20        .67      (.47)         --     (.47)   10.47      6.64
  1996(d)                      10.29         .51          (.02)       .49      (.51)         --     (.51)   10.27      4.84
  1995(d)                      10.16         .51           .13        .64      (.51)         --     (.51)   10.29      6.63
-----------------------------------------------------------------------------------------------------------------------------
CLASS C (12/95)
  2000                         11.02         .44          (.74)      (.30)     (.44)       (.15)    (.59)   10.13     (2.72)
  1999                         10.89         .43           .18        .61      (.44)       (.04)    (.48)   11.02      5.66
  1998                         10.47         .46           .42        .88      (.46)         --     (.46)   10.89      8.47
  1997(c)                      10.28         .44           .17        .61      (.42)         --     (.42)   10.47      6.00
  1996(f)                      10.57         .23          (.30)      (.07)     (.22)         --     (.22)   10.28     (1.78)*
-----------------------------------------------------------------------------------------------------------------------------
CLASS R (2/97)
  2000                         10.99         .52          (.73)      (.21)     (.52)       (.15)    (.67)   10.11     (1.91)
  1999                         10.86         .52           .16        .68      (.51)       (.04)    (.55)   10.99      6.42
  1998                         10.45         .54           .41        .95      (.54)         --     (.54)   10.86      9.17
  1997(e)                      10.60         .13          (.15)      (.02)     (.13)         --     (.13)   10.45      (.15)
-----------------------------------------------------------------------------------------------------------------------------

<CAPTION>
CLASS                                   RATIOS/SUPPLEMENTAL DATA
(INCEPTION DATE)             -----------------------------------------------
                                                    RATIO OF NET
                                        RATIO OF     INVESTMENT
                             ENDING     EXPENSES       INCOME
YEAR                           NET     TO AVERAGE    TO AVERAGE    PORTFOLIO
ENDED                        ASSETS       NET           NET        TURNOVER
APRIL 30,                     (000)    ASSETS(B)     ASSETS(B)       RATE
---------------------------
<S>                          <C>       <C>          <C>            <C>
CLASS A (9/92)
  2000                       $44,675       .75%         4.78%          22%
  1999                        51,773       .84          4.46           23
  1998                        42,339       .79          4.76           20
  1997(c)                     40,906       .68*        4.96*           26
  1996(d)                     46,742       .62          4.86           81
  1995(d)                     42,069       .54          5.15          102
---------------------------
CLASS C (12/95)
  2000                        10,586      1.30          4.25           22
  1999                         9,855      1.37          3.91           23
  1998                         3,533      1.34          4.20           20
  1997(c)                      2,540      1.23*        4.38*           26
  1996(f)                      1,187      1.13*        4.28*           81
---------------------------
CLASS R (2/97)
  2000                           728       .55          4.99           22
  1999                           707       .64          4.66           23
  1998                           602       .59          4.95           20
  1997(e)                        469       .40*        5.40*           26
---------------------------
</TABLE>

 * Annualized.
 + Information included prior to the 11 months ended April 30, 1997, reflects
   the financial highlights of Flagship intermediate.

(a)Total returns are calculated on net asset value without any sales charge and
   are not annualized except where noted.
(b)After waiver of certain management fees or reimbursement of expenses, if
   applicable, by Nuveen Advisory or its predecessor Flagship Financial. When
   custodian fee credits are applied, the Ratios of Expenses to Average Net
   Assets for 2000 are .74%, 1.29% and .54% for classes A, C and R,
   respectively, and the Ratios of Net Investment Income to Average Net Assets
   for 2000 are 4.79%, 4.26% and 5.00% for classes A, C and R, respectively.
(c)For the 11 months ended April 30.
(d)For the year ended May 31.
(e)From commencement of class operations as noted through April 30.
(f)From commencement of class operations as noted through May 31.

A- 2
<PAGE>   22

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