IAI RETIREMENT FUNDS INC
497, 1998-05-04
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                           IAI RETIREMENT FUNDS, INC.

                                   PROSPECTUS

                                   May 1, 1998







                                     [LOGO]
                                  MUTUAL FUNDS
<PAGE>


                                IAI MUTUAL FUNDS
                              --------------------
                               TABLE OF CONTENTS

<TABLE>
<CAPTION>
<S>                                                                          <C>
FINANCIAL HIGHLIGHTS..........................................................3
INVESTMENT OBJECTIVES AND POLICIES............................................6
         Regional Portfolio...................................................6
         Balanced Portfolio...................................................6
         Reserve Portfolio....................................................7
OTHER PORTFOLIO INVESTMENT TECHNIQUES.........................................7
PORTFOLIO RISK FACTORS........................................................10
MANAGEMENT....................................................................12
INVESTMENT PERFORMANCE........................................................13
COMPUTATION OF NET ASSET VALUE AND PRICING....................................14
PURCHASE OF SHARES............................................................14
REDEMPTION OF SHARES..........................................................14
DIVIDENDS, DISTRIBUTIONS AND TAX STATUS.......................................14
DESCRIPTION OF COMMON STOCK...................................................15
COUNSEL AND AUDITORS..........................................................15
CUSTODIAN, TRANSFER AGENT AND DIVIDEND DISBURSING AGENT.......................15
ADDITIONAL INFORMATION........................................................15
</TABLE>

<PAGE>
                                IAI MUTUAL FUNDS
                               ------------------
                          Prospectus dated May 1, 1998

                              
IAI RETIREMENT FUNDS, INC.

IAI Retirement Funds, Inc. (the "Fund"),  is a diversified,  open-end management
investment  company  offering  insurance  companies  a selection  of  investment
vehicles for variable  annuity  contracts and variable life insurance  policies.
This Prospectus  describes the three  portfolios  currently  offered by the Fund
(the "Portfolios").  Each Portfolio has its own distinct  investment  objective.
There  can be no  assurance  that any  Portfolio  will  achieve  its  investment
objective.

IAI Regional Portfolio  ("Regional  Portfolio") pursues its objective of capital
appreciation  by investing at least 80% of its equity  investments  in companies
which have their headquarters in Minnesota, Wisconsin, Iowa, Illinois, Nebraska,
Montana, North Dakota or South Dakota.

IAI  Balanced  Portfolio's  ("Balanced  Portfolio")  investment  objective is to
maximize total return to investors. IAI Balanced Portfolio pursues its objective
by investing in a broadly diversified  portfolio of stocks, bonds and short-term
instruments.

IAI Reserve  Portfolio's  ("Reserve  Portfolio")  investment  objectives  are to
provide its  shareholders  with high levels of capital  stability  and liquidity
and, to the extent  consistent  with these primary  objectives,  a high level of
current  income.  IAI Reserve  Portfolio  pursues its  investment  objectives by
investing  primarily in a diversified  portfolio of  investment  grade bonds and
other debt  securities  of  similar  quality.  IAI  Reserve  Portfolio's  dollar
weighted average maturity will not exceed twenty-five (25) months.

This  Prospectus  sets  forth  concisely  the  information  which a  prospective
investor  should know about the  Portfolios  before  investing  and it should be
retained for future reference. A "Statement of Additional Information" dated May
1, 1998, which provides a further discussion of certain areas in this Prospectus
and other  matters  which may be of interest to some  investors,  has been filed
with the  Securities  and  Exchange  Commission  and is  incorporated  herein by
reference.  For a free copy,  call or write the Fund at the address or telephone
number shown below.

Shares of each  Portfolio  may be  purchased  only by the  separate  accounts of
insurance  companies for the purpose of funding variable annuity and/or variable
life  insurance  contracts.  Particular  Portfolios may not be available in your
state due to various  insurance  regulations.  Please check with your  insurance
company.  Inclusion of a Portfolio in this  Prospectus is not to be considered a
solicitation  if such Portfolio is not available in your state.  This Prospectus
should be read in conjunction with the prospectus of the separate account of the
specific insurance product which accompanies this Prospectus.

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

SHARES OF THE FUND ARE NOT DEPOSITS OR OBLIGATIONS OF, OR GUARANTEED OR ENDORSED
BY, ANY FINANCIAL INSTITUTION,  ARE NOT INSURED BY THE FEDERAL DEPOSIT INSURANCE
CORPORATION,  THE FEDERAL  RESERVE BOARD OR ANY OTHER AGENCY,  AND INVOLVE RISK,
INCLUDING THE POSSIBLE LOSS OF PRINCIPAL AMOUNT INVESTED.


2
<PAGE>
                                IAI MUTUAL FUNDS
                               ------------------
                              Financial Highlights

                            
The following information has been audited by KPMG Peat Marwick LLP, independent
auditors,  whose  report is  included  in the  Portfolio's  Annual  Report.  The
financial  statements in the Annual Report are incorporated by reference in (and
are a part of) the Statement of Additional  Information.  Such Annual Report may
be obtained by shareholders on request from the Fund at no charge.

<TABLE>
<CAPTION>
<S>                                                 <C>           <C>              <C>        <C>
REGIONAL PORTFOLIO
                                                                                                   
                                                         Years Ended December 31,                  Period From
                                                 --------------------------------------------  January 31, 1994*** to
                                                      1997          1996            1995        December 31, 1994
                                                      ----          ----            ----        -----------------

NET ASSET VALUE
  Beginning of period                                $15.02      $ 14.16         $ 10.62              $ 10.00
                                                 --------------- -------------- ------------ ------------------------

OPERATIONS
  Net investment income                                0.08          0.05           0.06                0.03   
Net realized and unrealized gains                      1.90          1.60           3.50                0.59
                                                                                
                                                 --------------- -------------- ------------ ------------------------
Total from Operations                                  1.98          1.65           3.56                0.62
                                                                                
                                                 --------------- -------------- ------------ ------------------------

DISTRIBUTIONS TO SHAREHOLDERS FROM:
  Net investment income                               (0.07)        (0.05)        (0.02)                ----
  Net realized gains                                  (0.62)        (0.74)         ----                 ----      
                                                 --------------- -------------- ------------ ------------------------
Total Distributions                                   (0.69)        (0.79)        (0.02)                ----
                                                 --------------- -------------- ------------ ------------------------

NET ASSET VALUE
  End of period                                      $16.31        $ 15.02      $ 14.16              $ 10.62
                                                 =============== ============== ============ ========================

Total investment return* (%)                          13.45          11.88        33.51                 6.20

Net assets at end of period (000's omitted)          $17,085        $11,831       $5,105             $  865

RATIOS:
  Expenses to average daily net assets                 0.90           1.03        1.37**                1.13+**     
  Net investment income to average
    daily net assets (%)                               0.65           0.77        1.12**                0.81+**  
Average brokerage commission rate****                $0.0583         $0.0513       N/A                   N/A
  Portfolio turnover rate
    (excluding short-term securities)                62.1            78.4       156.0                 127.6
</TABLE>

     * Total  investment  return is based on the change in net asset  value of a
share during the period and assumes  reinvestment  of all  distributions  at net
asset value.
     ** The Portfolio's adviser voluntarily waived $6,737 and $7,455 in expenses
for the year ended  December 31, 1995,  and the period ended  December 31, 1994,
respectively. If the Portfolio had been charged for these expenses, the ratio of
expenses  to  average  daily  net  assets  would  have  been  1.64%  and  3.90%,
respectively, and the ratio of net investment income (loss) to average daily net
assets would have been .85% and (1.96%), respectively.
     *** Commencement of operations
     ****  Beginning  in fiscal 1996,  the  Portfolio is required to disclose an
average brokerage commission rate.
     + Annualized

                                                                               3
<PAGE>
                                IAI MUTUAL FUNDS
                              --------------------
                              Financial Highlights

<TABLE>
<CAPTION>
<S>                                                 <C>         <C>                 <C>         <C>    
BALANCED PORTFOLIO
            
                                                                                        
                                                          Years Ended December 31,                  Period From
                                                 --------------------------------------------   February 3, 1994*** to
                                                     1997          1996              1995        December 31, 1994
                                                     ----          ----              ----        -----------------
                                                 
NET ASSET VALUE
  Beginning of period                                $ 12.71        $ 11.78         $ 10.22           $ 10.00
                                                 --------------- -------------- ------------- -----------------------

OPERATIONS
  Net investment income                                 0.27           0.22            0.09              0.10
  Net realized and unrealized gains                     1.81           0.92            1.56              0.12
                                                 --------------- -------------- ------------- -----------------------
Total from Operations                                   2.08           1.14            1.65              0.22
                                                 --------------- -------------- ------------- -----------------------

DISTRIBUTIONS TO SHAREHOLDERS FROM:
  Net investment income                                (0.24)         (0.10)          (0.09)             ----
  Net realized gains                                   (0.26)         (0.11)                             ----
                                                                                      -----
                                                 --------------- -------------- ------------- -----------------------
Total Distributions                                    (0.50)         (0.21)          (0.09)             ----
                                                 --------------- -------------- ------------- -----------------------

NET ASSET VALUE
  End of period                                       $14.29        $ 12.71        $ 11.78            $ 10.22
                                                 =============== ============== ============= =======================

Total investment return* (%)                           16.60           9.80          16.21               2.20

Net assets at end of period (000's omitted)       $    2,446        $ 1,534         $  764             $  206

RATIOS:
  Expenses to average daily net assets** (%)            1.25           1.25           1.70               1.25+    
  Net investment income to average
    daily net assets**(%)                              2.63           2.84           2.34                2.28+
  Average brokerage commission rate****           $   0.0594       $ 0.0555           N/A                 N/A
  Portfolio turnover rate
    (excluding short-term securities)(%)              38.8           67.4           56.0                 21.6
- ------------------------------------------------
</TABLE>

     * Total  investment  return is based on the change in net asset  value of a
share during the period and assumes  reinvestment  of all  distributions  at net
asset value.
     ** The Portfolio's adviser voluntarily waived $1,753, $8,031,  $13,428, and
$7,756 in expenses for the years ended  December 31, 1997,  1996,  1995, and for
the period ended  December 31, 1994,  respectively.  If the  Portfolio  had been
charged for these  expenses,  the ratio of expenses to average  daily net assets
would have been 1.34%, 1.96%, 5.29% and 10.33%,  respectively,  and the ratio of
net investment  income (loss) to average daily net assets would have been 2.54%,
2.13%, (1.25%) and (6.80%), respectively.
     *** Commencement of operations
     ****  Beginning  in fiscal 1996,  the  Portfolio is required to disclose an
average brokerage commission rate.
     + Annualized

4
<PAGE>
                                IAI MUTUAL FUNDS
                             ----------------------
                              Financial Highlights
<TABLE>
<CAPTION>
<S>                                                   <C>          <C>            <C>         <C>      
RESERVE PORTFOLIO

                                                                                        
                                                        Years Ended December 31,                  Period From
                                                 --------------------------------------------  April 7, 1994*** to
                                                      1997         1996           1995         December 31, 1994
                                                      ----         ----           ----         -----------------


NET ASSET VALUE
  Beginning of period                                 $  10.03     $ 10.05        $ 10.03            $ 10.00
                                                 -------------- ------------- --------------- -----------------------

OPERATIONS
  Net investment income                                   0.43        0.49          0.48                0.20
  Net realized and unrealized gains (losses)              0.02       (0.01)         0.02                0.02
                                                 -------------- ------------- --------------- -----------------------
Total from Operations                                     0.45        0.48          0.50                0.22
                                                 -------------- ------------- --------------- -----------------------

DISTRIBUTIONS TO SHAREHOLDERS FROM:
  Net investment income                                (0.46)        (0.50)      (0.48)                (0.19)
  Net realized gains                                   (0.02)          ---         ---                  ---                
                                                 -------------- ------------- --------------- -----------------------
Total Distributions                                    (0.48)        (0.50)      (0.48)                (0.19)
                                                 -------------- ------------- --------------- -----------------------

NET ASSET VALUE
  End of period                                     $  10.00      $ 10.03      $ 10.05               $ 10.03
                                                 ============== ============= =============== =======================

Total investment return*(%)                             4.62         4.93         5.09                  2.25

Net assets at end of period (000's omitted)         $  1,021       $  528       $  844              $    544

RATIOS:
  Expenses to average daily net assets** (%)            0.85         0.85         1.03                  0.85+    
  Net investment income to average
    daily net assets**(%)                               4.57         4.54         4.84                  3.56+
  Portfolio turnover rate
    (excluding short-term securities) (%)                0.0       185.3          0.0                   0.0
</TABLE>

     * Total  investment  return is based on the change in net asset  value of a
share during the period and assumes  reinvestment  of all  distributions  at net
asset value.
     ** The Portfolio's adviser voluntarily waived $8,479,  $9,034,  $11,528 and
$6,930 in expenses for the years ended  December 31, 1997,  1996,  1995, and for
the period ended  December 31, 1994,  respectively.  If the  Portfolio  had been
charged for these  expenses,  the ratio of expenses to average  daily net assets
would have been 2.25%,  1.81%, 2.62% and 4.62%,  respectively,  and the ratio of
net investment  income(loss)  to average daily net assets would have been 3.17%,
3.58%, 3.25% and (.21%), respectively.
     *** Commencement of operations
     + Annualized

                                                                               5


<PAGE>
                                IAI MUTUAL FUNDS
                               ------------------

INVESTMENT OBJECTIVES 
AND POLICIES

The  investment  objectives  and policies of each of the  Portfolios  are listed
below.  There is no assurance  that any  Portfolio  will achieve its  investment
objective(s). The value of shares when redeemed may be higher or lower than when
purchased.

REGIONAL PORTFOLIO

The investment objective of Regional Portfolio is capital appreciation. Regional
Portfolio  does not expect to provide  significant  current income to investors.
Regional Portfolio pursues its objective by investing at least 80% of its equity
investments in companies which have their headquarters in Minnesota,  Wisconsin,
Iowa,  Illinois,  Nebraska,  Montana,  North  Dakota or South Dakota (the "Eight
State Region").  Regional  Portfolio's  investment  objective may not be changed
without shareholder approval.  There can be no assurance that Regional Portfolio
will achieve its investment objective.

Regional  Portfolio  invests  primarily in common  stocks but may also invest in
securities convertible into common stocks,  nonconvertible preferred stocks, and
nonconvertible debt securities. In selecting investments for Regional Portfolio,
Investment Advisers,  Inc. ("IAI"),  Regional Portfolio's investment adviser and
manager,  considers a number of factors, such as product development and demand,
operating ratios,  utilization of earnings for expansion,  management abilities,
analyses of intrinsic  values,  market action and overall economic and political
conditions.

Along with investments in nationally  recognized  companies,  Regional Portfolio
invests in companies  which are not as well known because they are newer or have
a small capitalization,  but which offer the potential for capital appreciation.
The prices of stocks of such  companies  are more volatile than prices of stocks
of mature companies. All investments are subject to the market risks inherent in
any investment in equity securities.

Regional Portfolio may employ certain other investment techniques,  as described
in  the  section  "Other  Portfolio  Investment  Techniques".   Please  see  the
Prospectus  section  "Portfolio  Risk  Factors"  as  well  as the  Statement  of
Additional  Information  section  "Investment  Objectives  and  Policies"  for a
discussion of the risks associated with investing in Regional Portfolio.

BALANCED PORTFOLIO

The  investment  objective of Balanced  Portfolio is to maximize  total  return.
Balanced  Portfolio will seek to achieve its objective by investing in a broadly
diversified  portfolio of stocks,  bonds and  short-term  instruments.  Balanced
Portfolio's  investment objective is a fundamental policy and may not be changed
without shareholder approval.  There can be no assurance that Balanced Portfolio
will achieve its investment objective.

In  seeking to achieve  its  investment  objective,  IAI,  Balanced  Portfolio's
investment adviser and manager,  allocates Balanced Portfolio's assets among the
three  classes  of assets  set forth  above.  Under  normal  market  conditions,
Balanced  Portfolio  holds between 25% and 75% of its assets in stocks and other
equity  securities,  between  25% and 75% of its assets in bonds and other fixed
income  securities,  and  up to 50% of its  assets  in  short-term  instruments.
Balanced Portfolio may also make other investments that do not fall within these
classes.

The stock class includes equity  securities of all types and consists  primarily
of common stocks, securities convertible into common stocks, and non-convertible
preferred  stocks.  The  bond  class  includes  all  varieties  of  fixed-income
instruments  with  maturities  of more than one year and  consists  primarily of
investment  grade bonds.  Investment grade securities are those securities rated
within the four  highest  grades  assigned by Moody's  Investors  Service,  Inc.
("Moody's") or Standard & Poor's  Corporation  ("S&P").  Balanced  Portfolio may
also purchase U.S. Treasury  inflation-protection  securities. The value of such
inflation-protection  securities is adjusted for inflation and periodic interest
payments are in amounts equal to a fixed  percentage  of the  inflation-adjusted
value of the  principal.  Although  Balanced  Portfolio may also invest in below
investment grade securities (junk bonds),  Balanced Portfolio  currently intends
to limit such investments to less than 10% of its total assets and not to invest
in junk bonds rated lower than B by Moody's or S&P.

Securities  rated  in the  medium  to  lower  rating  categories  of  nationally
recognized statistical rating organizations and unrated securities of comparable
quality  are  predominately  speculative  with  respect to the  capacity  to pay
interest and repay  principal in  accordance  with the terms of the security and
generally involve a greater volatility of price than securities in higher rating
categories.  See  "Investment  Objectives and Policies" in and Appendix A to the
Statement of Additional Information for additional information regarding ratings
of debt securities. In purchasing such securities,  Balanced Portfolio will rely
on IAI's judgment, analysis and experience in evaluating the creditworthiness of
an issuer of such  securities.  IAI will take into  consideration,  among  other
things, the issuer's financial resources, its sensitivity to economic conditions
and trends,  its operating history,  the quality of the issuer's  management and
regulatory matters.

The short-term class includes all types of short-term instruments with remaining
maturities of one year or less and consists  primarily of commercial paper, bank
certificates of deposit, bankers' acceptances, government securities, repurchase
agreements and other similar short-term  instruments.  Short-term securities are
only  purchased if given one of the top two ratings by a major  ratings  service
or, if unrated, are of comparable quality as determined by IAI.

Within each of these classes, Balanced Portfolio may invest in both domestic and
foreign  securities.   Currently,   Balanced  

6
<PAGE>
                                IAI MUTUAL FUNDS
                              --------------------

Portfolio intends to limit its investment in foreign  securities  denominated in
foreign  currency and not publicly  traded in the United  States to no more than
25% of its total assets.

IAI regularly  reviews its allocation of Balanced  Portfolio's  assets among the
three classes and  gradually  varies them over time to favor asset classes that,
in IAI's  judgment,  provide the most favorable  total return  outlook.  Because
Balanced  Portfolio  seeks to maximize total return over the long-term,  it will
not try to pinpoint the precise moment when major  reallocations  are warranted.
Rather,  such reallocations among asset classes will be made gradually over time
and, under normal conditions,  a single  reallocation  decision will not involve
more than 10% of Balanced Portfolio's total assets.

Balanced Portfolio may employ certain other investment techniques,  as described
in  the  section  "Other  Portfolio  Investment  Techniques".   Please  see  the
Prospectus  section  "Portfolio  Risk  Factors"  as  well  as the  Statement  of
Additional  Information  section  "Investment  Objectives  and  Policies"  for a
discussion of the risks associated with investing in Balanced Portfolio.

RESERVE PORTFOLIO

Reserve Portfolio's  investment  objectives are to provide its shareholders with
high levels of capital  stability  and liquidity  and, to the extent  consistent
with these primary  objectives,  a high level of current income. Such objectives
may not be changed without shareholder approval.  There can be no assurance that
Reserve Portfolio will achieve its investment objectives.

Reserve  Portfolio  pursues its  objectives  primarily  through  investment in a
diversified  portfolio of  investment  grade bonds and other debt  securities of
similar  quality.  Investment grade securities are those securities rated within
the four highest grades assigned by Moody's Investors Service,  Inc. ("Moody's")
or Standard and Poor's  Corporation  ("S&P").  Reserve Portfolio will maintain a
dollar weighted average maturity of its investment portfolio of twenty-five (25)
months or less. For purposes of such determination,  securities that provide for
optional maturity dates, at the holder's option,  shall be deemed by the Fund to
have been issued with the shorter optional maturity dates.

Other debt securities in which Reserve  Portfolio may invest include  securities
of, or guaranteed by, the U.S.  Government,  its agencies or  instrumentalities,
corporate debt obligations, debt securities of foreign issuers, mortgage-related
securities,  commercial paper rated at least Prime-2 by Moody's or A-2 by S&P or
otherwise  issued  by  companies  having an  outstanding  unsecured  debt  issue
currently rated A or better by Moody's or S&P, bank  certificates of deposit and
other  short-term   instruments  and  repurchase  agreements  relating  to  such
securities.  The  Fund may  purchase  securities  issued  by the  United  States
Government.  Such  securities  may include  U.S.  Treasury  inflation-protection
securities.  The value of such  inflation-protection  securities in adjusted for
inflation  and  periodic  interest  payments  are in  amounts  equal  to a fixed
percentage of the  inflation-adjusted  value of the principal.  U.S.  Government
securities  are issued or  guaranteed  by the U.S.  Treasury  or by an agency or
instrumentality of the U.S. Government.  Not all U.S. Government  securities are
backed by the full  faith and credit of the United  States.  Some are  supported
only by the credit of the agency that issued them.

Reserve  Portfolio may also invest in below  investment grade  securities.  Such
securities are commonly referred to as junk bonds.  Reserve Portfolio  currently
intends to limit such  investments  to less than 10% of its total assets and not
to invest in junk bonds rated lower than B by Moody's or S&P Securities rated in
the medium to lower  rating  categories  of  nationally  recognized  statistical
rating   organizations  and  unrated   securities  of  comparable   quality  are
predominately speculative with respect to the capacity to pay interest and repay
principal in accordance  with the terms of the security and generally  involve a
greater volatility of price than securities in higher rating categories.

See  "Investment  Objectives  and  Policies"  in Appendix A to the  Statement of
Additional  Information  for additional  information  regarding  ratings of debt
securities. In purchasing such securities,  Reserve Portfolio will rely on IAI's
judgment,  analysis and  experience in  evaluating  the  creditworthiness  of an
issuer of such securities. IAI will take into consideration, among other things,
the issuer's  financial  resources,  its sensitivity to economic  conditions and
trends,  its  operating  history,  the quality of the  issuer's  management  and
regulatory matters.

For  additional  information  regarding the types of securities  and  investment
techniques that may be utilized by Reserve Portfolio, see "Other Fund Investment
Techniques".  For  additional  information  regarding  the risks of investing in
Reserve Portfolio, see "Fund Risk Factors".


OTHER PORTFOLIO INVESTMENT 
TECHNIQUES

Each  Portfolio's  ability  to  utilize  certain  of the  investment  techniques
discussed  below may be subject to limitations and may subject each Portfolio to
additional risks. Please refer to the section "Portfolio Risk Factors" below and
the Statement of Additional  Information  for more  information  regarding  such
risks.

REPURCHASE AGREEMENTS

Each  Portfolio is permitted to invest in  repurchase  agreements.  A repurchase
agreement   is  a  contract  by  which  a  Portfolio   acquires   the   security
("collateral")  subject  to the  obligation  of the  seller  to  repurchase  the
security at a fixed price and date. A repurchase agreement may be construed as a
loan under  relevant law. Each  Portfolio may enter into  repurchase  agreements
with  respect to any  securities  which they may acquire  consistent  with their
investment policies and restrictions.  Each Portfolio's  custodian will hold the
securities  underlying  any  repurchase  agreement in a segregated  account.  In
investing 


                                                                               7
<PAGE>
                                IAI MUTUAL FUNDS                   
                               -------------------


in repurchase agreements, each Portfolio's risk is limited to the ability of the
seller to pay the agreed-upon price at the maturity of the repurchase agreement.
In the opinion of the Adviser, such risk is not material,  since in the event of
default, barring extraordinary  circumstances,  each Portfolio would be entitled
to sell the underlying securities or otherwise receive adequate protection under
federal  bankruptcy laws for its interest in such  securities.  However,  to the
extent that proceeds  from any sale upon a default are less than the  repurchase
price, each Portfolio could suffer a loss. In addition, each Portfolio may incur
certain delays in obtaining direct ownership of the collateral.

FOREIGN SECURITIES

Each  Portfolio may invest in securities of foreign  issuers in accordance  with
its  investment  objectives  and policies.  In  considering  whether to purchase
securities  of foreign  issuers,  IAI will  consider the  political and economic
conditions  in a country,  the prospect for changes in the value of its currency
and the  liquidity  of the  investment  in that  country's  securities  markets.
Regional  Portfolio  intends  to limit  its  investment  in  foreign  securities
denominated in foreign  currency and not publicly traded in the United States to
no more than 10% of its total  assets.  Reserve  Portfolio  intends to invest no
more  than 15% of the value of its total  assets  in such  securities.  Balanced
Portfolio intends to invest no more than 25% of the value of its total assets in
such securities.

ILLIQUID SECURITIES

Each  Portfolio may also invest up to 15% of its net assets in  securities  that
are considered  illiquid because of the absence of a readily available market or
due to legal or contractual restrictions. However, certain restricted securities
that are not registered for sale to the general public but that can be resold to
institutional  investors may be considered liquid pursuant to guidelines adopted
by the Board of Directors.  The institutional  trading market is relatively new,
and the liquidity of each Portfolio's  investments  could be impaired if trading
does not develop or declines.

VENTURE CAPITAL

Regional  and  Balanced   Portfolios  may  invest  in  venture  capital  limited
partnerships  and venture  capital funds which, in turn,  invest  principally in
securities of early stage, developing companies.  Investments in venture capital
limited  partnerships  and venture  capital  funds present a number of risks not
found in investing in  established  enterprises  including the facts that such a
partnership's   or  fund's   portfolio  will  be  composed  almost  entirely  of
early-stage  companies  which  may  lack  depth  of  management  and  sufficient
resources,  which  may  be  marketing  a  new  product  for  which  there  is no
established  market, and which may be subject to intense competition from larger
companies.  Any investment in a venture capital  limited  partnership or venture
capital fund will lack  liquidity,  will be  difficult  to value,  and each such
Portfolio  will  not  be  entitled  to  participate  in  the  management  of the
partnership or fund. If for any reason the services of the general partners of a
venture capital limited  partnership  were to become  unavailable,  such limited
partnership could be adversely affected.

In addition to investing in venture  capital  limited  partnerships  and venture
capital  funds,   Regional  and  Balanced  Portfolios  may  directly  invest  in
early-stage,  developing companies. The risks associated with investing in these
securities are  substantially  similar to the risks set forth above. A Portfolio
will  typically  purchase  equity  securities in these  early-stage,  developing
companies;  however,  from time-to-time a Portfolio may purchase  non-investment
grade debt securities in the form of convertible notes. Each Portfolio currently
intends to limit its  investments in securities  described in this section to no
more than 5% of its net assets.

LEVERAGED BUYOUTS (LBOS)

Regional  and  Balanced  Portfolios  may  invest  in  leveraged  buyout  limited
partnerships and funds which, in turn,  invest in leveraged buyout  transactions
("LBOs").  An LBO,  generally,  is an acquisition  of an existing  business by a
newly formed corporation financed largely with debt assumed by such newly formed
corporation to be later repaid with funds  generated from the acquired  company.
Since most LBOs are by nature highly  leveraged  (typically  with debt to equity
ratios of  approximately  9 to 1),  equity  investments  in LBOs may  appreciate
substantially  in value given only modest growth in the earnings or cash flow of
the acquired business.  Investments in LBOs, however, present a number of risks.
Investments in LBO limited  partnerships  and funds will normally lack liquidity
and may be subject to intense  competition  from other LBO limited  partnerships
and  funds.  Additionally,   if  the  cash  flow  of  the  acquired  company  is
insufficient to service the debt assumed in the LBO, the LBO limited partnership
or fund could lose all or part of its investment in such acquired company.

WHEN-ISSUED/DELAYED DELIVERY 
TRANSACTIONS

Balanced and Reserve  Portfolios may purchase  securities on a "when-issued"  or
delayed delivery basis and purchase or sell securities on a "forward commitment"
basis. When such transactions are negotiated, the price is fixed at the time the
commitment is made, but delivery and payment for the securities  take place at a
later date.  Normally,  the  settlement  date occurs within two months after the
transaction, but delayed settlements beyond two months may be negotiated. At the
time  a  Portfolio  enters  into  a  transaction  on a  when-issued  or  forward
commitment basis, a segregated  account  consisting of appropriate liquid assets
and maintained with the custodian and will be marked to the market daily. During
the  period  between a  commitment  and  settlement,  no payment is made for the
securities and, thus, no interest accrues to the purchaser from the transaction.
If a Portfolio disposes of the right to acquire a when-issued  security prior to
its acquisition or disposes of its right to deliver or receive against a forward
commitment,  it can incur a gain or loss due to market  fluctuation.  The use of
when-issued  transactions and 

8
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                                IAI MUTUAL FUNDS
                              -------------------


forward  commitments enables a Portfolio to hedge against anticipated changes in
interest rates and prices. A Portfolio may also enter into such  transactions to
generate  incremental  income.  In some  instances,  the  third-party  seller of
when-issued  or  forward  commitment  securities  may  determine  prior  to  the
settlement  date  that it will be  unable  or  unwilling  to meet  its  existing
transaction  commitments  without borrowing  securities.  If advantageous from a
yield perspective,  a Portfolio may, in that event, agree to resell its purchase
commitment to the third-party  seller at the current market price on the date of
sale and concurrently enter into another purchase commitment for such securities
at a later date.  As an  inducement  for a Portfolio to "roll over" its purchase
commitment,  a  Portfolio  may receive a  negotiated  fee. No more than 20% of a
Portfolio's  net assets may be  invested  in  when-issued,  delayed  delivery or
forward commitment  transactions,  and of such 20%, no more than one-half (i.e.,
10% of its net  assets)  may be invested  in  when-issued,  delayed  delivery or
forward  commitment  transactions  without the  intention of actually  acquiring
securities  (i.e.,  dollar  rolls  or  "roll"   transactions).   For  additional
information on roll  transactions,  see  "Investment  Objectives and Policies --
Dollar Rolls" in the Statement of Additional Information.

ZERO COUPON OBLIGATIONS

Balanced and Reserve  Portfolios  may also invest in zero coupon  obligations of
the U.S.  Government or its agencies,  tax exempt issuers and corporate issuers,
including  rights to stripped  coupon and principal  payments  ("STRIPS").  Zero
coupon bonds do not make regular interest payments;  rather,  they are sold at a
discount from face value. Principal and accreted discount (representing interest
accrued but not paid) are paid at maturity.  STRIPS are debt securities that are
stripped of their interest  after the  securities are issued,  but otherwise are
comparable  to zero coupon  bonds.  The market  values of STRIPS and zero coupon
bonds generally  fluctuate in response to changes in interest rates to a greater
degree than do interest-paying securities of comparable term and quality.

MORTGAGE-BACKED SECURITIES

Balanced and Reserve Portfolios may invest in pass-through  securities which are
sold by various  private,  governmental  and  government-related  organizations.
Pass-through securities are formed when mortgages and other debt instruments are
pooled  together and undivided  interests in the pool are sold to investors such
as  Balanced  and Reserve  Portfolios.  The cash flow from the  underlying  debt
instruments is "passed  through" to the holders of the securities in the form of
periodic  (generally  monthly) payments of interest,  principal and prepayments.
Prepayments  occur when the holder of an individual debt instrument  prepays the
remaining  principal  and interest  before the final  scheduled  payment  month.
Therefore,  Balanced and Reserve  Portfolios  may be subject to a higher rate of
prepayments  during periods of declining interest rates when mortgages and other
debt instruments may be more frequently prepaid.

Mortgage  pass-through  securities  include (1)  obligations of U.S.  government
agencies and instrumentalities which are secured by the full faith and credit of
the U.S.  Treasury such as Government  National  Mortgage  Association  ("GNMA")
pass-through certificates; (2) obligations which are secured by the right of the
issuer to borrow from the  Treasury,  such as  securities  issued by the Federal
Financing  Bank,  the  Federal  Home Loan  Banks and the  United  States  Postal
Service;  and (3)  obligations  which have the principal  and interest  payments
guaranteed  by the  government  agency or  instrumentality  itself  (but are not
backed by the full faith and credit of the U.S. government),  such as securities
of the Federal  National  Mortgage  Association  ("FNMA")  and Federal Home Loan
Mortgage Corporation ("FHLMC"); and (4) obligations of private corporations.

ASSET-BACKED SECURITIES

Balanced and Reserve  Portfolios may invest in types of asset-backed  securities
which  represent  forms of consumer  credit such as  automobile  and credit card
receivables,  manufactured  (mobile) home loans, home improvement loans and home
equity loans.  Asset-backed  securities are generally  privately issued and pass
through cash flows to investors. Generally, asset-backed securities include many
of the risks associated with mortgage-related  securities.  In general, however,
the collateral  supporting  asset-backed  securities is of shorter maturity than
mortgage  loans  and is  less  likely  to  experience  substantial  prepayments.
Asset-backed   securities   involve   certain   risks  that  are  not  posed  by
mortgage-backed  securities,  resulting  mainly from the fact that  asset-backed
securities do not usually contain the complete benefit of a security interest in
the related  collateral.  For example,  credit card  receivables  generally  are
unsecured  and the debtors are entitled to the  protection  of a number of state
and federal  consumer credit laws,  including the bankruptcy laws, some of which
may  reduce  the  ability  to obtain  full  payment.  In the case of  automobile
receivables, due to various legal and economic factors, proceeds for repossessed
collateral may not always be sufficient to support payments on these securities.

ADJUSTING INVESTMENT EXPOSURE

Each  Portfolio may, but is not required to,  utilize  various other  investment
strategies as described  below to hedge  various  market risks (such as interest
rates,  currency  exchange  rates,  and broad or  specific  fixed-income  market
movements), to manage the effective maturity or duration of the Portfolios or to
enhance  potential  gain.  These  strategies may be executed  through the use of
derivative contracts. Such strategies are generally accepted as a part of modern
portfolio  management and are regularly  utilized by many mutual funds and other
institutional investors.  Techniques and instruments may change over time as new
instruments and strategies are developed or regulatory changes occur.

In the course of  pursuing  these  investment  strategies,  each  Portfolio  may
purchase and sell  exchange-listed and  over-the-counter put and call options on
securities,  fixed-income 

                                                                               9
<PAGE>
                                IAI MUTUAL FUNDS
                              -------------------

indices and other  financial  instruments,  purchase and sell financial  futures
contracts and options  thereon,  enter into various  interest rate  transactions
such as swaps and enter into  various  currency  transactions  such as  currency
forward  contracts,  currency  futures  contracts,  currency swaps or options on
currencies or currency futures.

There is no limit on the  amount  on Fund  assets  that can be used for  hedging
purposes,  i.e., to attempt to protect  against  possible  changes in the market
value  of  securities  held  in or to be  purchased  for  the  Fund's  portfolio
resulting from securities  markets or currency  exchange rate  fluctuations,  to
protect the Fund's unrealized gains in the value of its portfolio securities, to
facilitate the sale of such securities for investment purposes,  or to establish
a position in the derivatives  markets as a temporary  substitute for purchasing
or selling  particular  securities.  Some may also be used to enhance  potential
gain  although  no more than 5% of the Fund's net assets  will be  committed  to
techniques and instruments entered into for non-hedging purposes.  Any or all of
these investment techniques may be used at any time and in any combination,  and
there is no particular  strategy  that dictates the use of one technique  rather
than another,  as use of any technique or  instruments is a function of numerous
variables including market conditions.  The ability of the Fund to utilize these
techniques and instruments  successfully will depend on IAI's ability to predict
pertinent market movements,  which cannot be assured.  The Fund will comply with
applicable   regulatory   requirements  when   implementing   these  strategies,
techniques and instruments.  Such techniques and instruments involving financial
futures and options  thereon  will be  purchased,  sold or entered into only for
bona fide hedging,  risk management or portfolio management purposes and not for
speculative purposes.

BORROWING
     
Each Portfolio may borrow from banks (or through reverse repurchase  agreements)
for temporary or emergency  purposes.  If a Portfolio  borrows money,  its share
price may be subject to greater  fluctuation until the borrowing is paid off. If
a Portfolio makes additional investments while borrowings are outstanding,  this
may be  considered a form of leverage.  Each  Portfolio  currently has a line of
credit with a bank at the prime  interest  rate.  To the extent  funds are drawn
against the line of credit,  securities  are held in a  segregated  account.  No
compensating balances or commitment fees are required under the lines of credit.
Each Portfolio does not intend its borrowing to exceed 5% of its net assets.

TEMPORARY DEFENSIVE POSITION

In unusual market conditions,  when IAI believes a temporary  defensive position
is  warranted,  each  Portfolio  may invest  without  limitation in money market
securities and/or investment grade fixed income securities,  that is, securities
rated within the four highest grades assigned by Moody's or S&P, or money market
securities (including repurchase agreements).  Money market securities will only
be  purchased  if they have been  given  one of the two top  ratings  by a major
ratings service or, if unrated,  are of comparable quality as determined by IAI.
If a Portfolio maintains a temporary  defensive position,  investment income may
increase and may constitute a large portion of a Portfolio's return.

PORTFOLIO TURNOVER

Each Portfolio  will dispose of securities  without regard to the time they have
been held when such action appears advisable to management either as a result of
securities  having reached a price  objective,  or by reason of developments not
foreseen  at the  time of the  investment  decision.  Since  investment  changes
usually will be made without reference to the length of time a security has been
held, a significant number of short-term transactions may result. Accordingly, a
Portfolio's  annual  portfolio  turnover rate cannot be  anticipated  and may be
relatively high. High turnover rates (100% or more) increase  transaction  costs
and may increase taxable capital gains.  Each Portfolio's  historical  portfolio
turnover rates are set forth in the section "Financial Highlights."

Further  information  regarding  these and other  securities  and  techniques is
contained in the Statement of Additional Information.

PORTFOLIO RISK FACTORS

INTEREST RATE RISK
   
As mutual  funds  investing  in fixed  income  securities,  Reserve and Balanced
Portfolios  are  subject  to  interest  rate  risk.  Interest  rate  risk is the
potential for a decline in bond prices due to rising interest rates. In general,
bond prices vary inversely with interest  rates.  When interest rates rise, bond
prices  generally  fall.  Conversely,  when  interest  rates  fall,  bond prices
generally  rise. The change in price depends on several  factors,  including the
bond's  maturity  date.  In  general,  bonds  with  longer  maturities  are more
sensitive to changes in interest  rates than bonds with shorter  maturities.  In
managing  these  Portfolios,  IAI will  adjust the  duration  of the  investment
portfolio in response to economic and market  conditions.  Duration is generally
considered a better measure of interest rate risk than is maturity.  Duration is
a  measure  of the  expected  change  in value of a fixed  income  security  (or
portfolio) for a given change in interest rates. For example,  if interest rates
rise by one  percent,  the market value of a security  (or  portfolio)  having a
duration  of two  generally  will fall by  approximately  two  percent.  In some
situations,  the standard  duration  calculation  does not properly  reflect the
interest  rate  risk of a  security.  In such  situations,  IAI  will  use  more
sophisticated  analytical  techniques,  such as modeling  principal and interest
payments based upon historical  experience or expected volatility,  to arrive at
an effective  duration  that  incorporates  the  additional  variables  into the
determination of interest rate risk.  These techniques may involve  estimates of
future  economic  parameters  which may vary from actual  future  outcomes.  IAI
anticipates  the  duration  range for the Reserve  Portfolio  not to exceed 1.75
years and for the fixed income portion
    

10
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                                IAI MUTUAL FUNDS
                              --------------------

of the  Balanced  Portfolio  to be 3.5 to 7.5  years.  These  ranges  are merely
expectations  as of the date of this  Prospectus.  Such ranges may change due to
market conditions and other economic factors.  Therefore,  the expected duration
ranges do not limit IAI in how it manages the Portfolios.

These  principals  of interest  rate risk also apply to U.S.  Treasury  and U.S.
Government agency securities.  As with other bond investments,  U.S.  Government
securities  will rise and fall in value as  interest  rates  change.  A security
backed by the U.S. Treasury or the full faith and credit of the United States is
guaranteed  only as to the timely payment of interest and principal when held to
maturity.  The current market prices for such  securities are not guaranteed and
will fluctuate.

CREDIT RISK

Reserve Portfolio and the fixed income component of Balanced  Portfolio are also
subject  to credit  risk.  Credit  risk,  also  known as  default  risk,  is the
possibility  that a bond issuer will fail to make timely payments of interest or
principal  to the  Portfolio.  The  credit  risk of a  Portfolio  depends on the
quality of its investments.  Reflecting their higher risks,  lower-quality bonds
generally offer higher yields (all other factors being equal).

CALL RISK

Reserve Portfolio and the fixed income component of Balanced  Portfolio are also
subject to call risk. Call risk is the possibility  that corporate bonds held by
a Portfolio will be repaid prior to maturity.  Call  provisions,  common in many
corporate  bonds,  allow bond  issuers to redeem  bonds prior to maturity  (at a
specified price).  When interest rates are falling,  bond issuers often exercise
these call  provisions,  paying off bonds that carry high stated  interest rates
and often issuing new bonds at lower rates. For a Portfolio, the result would be
that bonds with high  interest  rates are  "called"  and must be  replaced  with
lower-yielding  instruments.  In these circumstances,  the income of a Portfolio
would decline.

FOREIGN INVESTMENT RISK FACTORS

Investments  in foreign  securities  involve  risks that are  different  in some
respects from  investments  in securities of U.S.  issuers,  such as the risk of
fluctuations in the value of the currencies in which they are  denominated,  the
risk of adverse political and economic developments and, with respect to certain
countries,  the possibility of  expropriation,  nationalization  or confiscatory
taxation  or  limitations  on the  removal  of  funds  or  other  assets  of the
Portfolios.  Securities  of some  foreign  companies  are less  liquid  and more
volatile than  securities of comparable  domestic  companies.  There also may be
less publicly available information about foreign issuers than domestic issuers,
and  foreign  issuers  generally  are not  subject  to the  uniform  accounting,
auditing  and  financial   reporting   standards,   practices  and  requirements
applicable to domestic issuers.  Because the Portfolios can invest in securities
denominated  or quoted in  currencies  other  than the U.S.  dollar,  changes in
foreign  currency  exchange  rates may  affect  the value of  securities  in the
portfolio.  Foreign  currency  exchange rates are determined by forces of supply
and demand in the foreign  exchange  markets and other  economic  and  financial
conditions affecting the world economy. A decline in the value of any particular
currency  against the U.S.  dollar will cause a decline in the U.S. dollar value
of a  Portfolios'  holdings of  securities  denominated  in such  currency  and,
therefore,  will cause an overall  decline in a Portfolio's  net asset value and
net  investment  income and capital  gains,  if any, to be  distributed  in U.S.
dollars to  shareholders  by a Portfolio.  Delays may be encountered in settling
securities  transactions  in certain  foreign  markets,  and the Portfolios will
incur costs in converting foreign  currencies into U.S dollars.  Custody charges
are generally higher for foreign securities.

RISKS ASSOCIATED WITH ADJUSTING 
INVESTMENT EXPOSURE

The techniques and instruments  described in the section  "Adjusting  Investment
Exposure",  including  derivative  contracts,  have risks  associated  with them
including  possible default by the other party to the  transaction,  illiquidity
and, to the extent IAI's view as to certain market  movements is incorrect,  the
risk that the use of such  techniques  and  instruments  could  result in losses
greater  than if they had not been used.  Use of put and call options may result
in losses to a Portfolio,  force the sale or purchase of portfolio securities at
inopportune  times or for prices  higher  than (in the case of put  options)  or
lower  than (in the case of call  options),  current  market  values,  limit the
amount of  appreciation  a Portfolio can realize on its  investments  or cause a
Portfolio  to hold a  security  it might  otherwise  sell.  The use of  currency
transactions can result in a Portfolio  incurring losses as a result of a number
of  factors  including  the  imposition  of  exchange  controls,  suspension  of
settlements or the inability to deliver or receive a specified currency. The use
of options and futures  transactions entails certain other risks. In particular,
the variable degree of correlation  between price movements of futures contracts
and price movements in the related portfolio position of a Portfolio creates the
possibility  that losses on the hedging  instrument may be greater than gains in
the value of a Portfolio's  position.  In addition,  futures and options markets
may not be liquid in all circumstances and certain  over-the-counter options may
not have markets. As a result, in certain markets, a Portfolio might not be able
to close out a transaction  without  incurring  substantial  losses,  if at all.
Although  the use of futures  contracts  and  options  transactions  for hedging
should  tend to  minimize  the risk of loss due to a decline in the value of the
hedged  position,  at the same time they tend to limit any potential  gain which
might  result  from an increase in value of such  position.  Finally,  the daily
variation  margin  requirements  for futures  contracts  would  create a greater
ongoing  potential  financial  risk than would  purchases of options,  where the
exposure is limited to the cost of the initial  premium.  Losses  resulting from
the use of these  techniques  would reduce net asset value, and possibly income,
and such losses can be greater than if the  techniques and  instruments  had not
been utilized.

                                                                              11
<PAGE>

                                IAI MUTUAL FUNDS
                              -------------------

RISKS OF GEOGRAPHIC CONCENTRATION

For Regional  Portfolio,  the objective of capital  appreciation  along with the
policy of concentrating  equity investments in the Eight State Region means that
the assets of the Portfolio  will  generally be subject to greater risk than may
be involved in investing in securities which do not have appreciation  potential
or which have more geographic diversity.  For example, the Portfolio's net asset
value could be adversely affected by economic,  political, or other developments
having an unfavorable impact upon the Eight State Region;  moreover,  because of
the geographic limitation, the Portfolio may be less diversified by industry and
company  than  other  funds  with a  similar  investment  objective  and no such
geographic limitation.

RISKS OF LOWER-RATED DEBT SECURITIES

Reserve and Balanced  Portfolios may invest in debt securities commonly known as
"junk" bonds.  Such  securities  are subject to higher risks and greater  market
fluctuations than are lower-yielding, higher-rated securities. The price of junk
bonds has been found to be less  sensitive  to changes  in  prevailing  interest
rates  than  higher-rated  investments,  but is likely to be more  sensitive  to
adverse  economic  changes  or  individual  corporate  developments.  During  an
economic  downturn  or  substantial  period of  rising  interest  rates,  highly
leveraged  issuers may experience  financial stress which would adversely affect
their ability to service their principal and interest  payment  obligations,  to
meet their projected  business goals or to obtain additional  financing.  If the
issuers of a  fixed-income  security  owned by a Portfolio  were to  default,  a
Portfolio might incur additional expenses to seek recovery. The risk of loss due
to  default  by  issuers  of junk  bonds  is  significantly  greater  than  that
associated with higher-rated  securities  because such securities  generally are
unsecured  and  frequently  are  subordinated  to the  prior  payment  of senior
indebtedness.  In addition,  periods of economic  uncertainty  and change can be
expected to result in an increased volatility of market prices of junk bonds and
a concomitant volatility in the net asset value of a share of a Portfolio.
                                       
The  secondary  market for junk bonds is less liquid than the markets for higher
quality securities and, as such, may have an adverse effect on the market prices
of certain  securities.  The limited  liquidity of the market may also adversely
affect the  ability of a Portfolio  to arrive at a fair value for  certain  junk
bonds at  certain  times and could make it  difficult  for a  Portfolio  to sell
certain securities. For a description of Moody's and S&P ratings, see Appendix A
to the Statement of Additional Information.

PREPAYMENT RISKS

To the extent they invest in  mortgage-backed  securities,  Balanced and Reserve
Portfolios are subject to prepayment  risk.  Prepayment  risk is the possibility
that, as interest rates fall, homeowners are more likely to refinance their home
mortgages.   When  home  mortgages  are   refinanced,   the  principal  on  GNMA
certificates held by a Portfolio is "prepaid" earlier than expected. A Portfolio
must then  reinvest the  unanticipated  principal in new GNMA  certificates,  or
other securities, just at a time when interest rates on new mortgage investments
are falling.

Prepayment risk has two important effects on a Portfolio:

- -  When  interest  rates  fall  and  additional  mortgage  prepayments  must  be
reinvested at lower interest rates, the income of a Portfolio will be reduced.

- - When interest rates fall,  prices on GNMA  securities will not rise as much as
comparable  Treasury bonds, as bond market  investors  anticipate an increase in
mortgage prepayments and a likely decline in income.

MANAGER RISK

IAI manages  each  Portfolio  according to the  traditional  methods of "active"
investment management,  which involve the buying and selling of securities based
upon economic,  financial and market analysis and investment  judgment.  Manager
risk  refers  to the  possibility  that IAI may fail to  execute  a  Portfolio's
investment  strategy  effectively.  As a result, a Portfolio may fail to achieve
its stated objective.

INVESTMENT RESTRICTIONS

Each Portfolio is subject to certain other investment  policies and restrictions
described  in the  Statement  of  Additional  Information,  some  of  which  are
fundamental and may not be changed  without the approval of the  shareholders of
the  Portfolio.  Each  Portfolio is a diversified  investment  company and has a
fundamental  policy that,  with respect to 75% of its total  assets,  it may not
invest more than 5% of its total assets in any one issuer. Each Portfolio,  also
as  fundamental  policies,  may not  invest 25% or more of its assets in any one
industry and may borrow only for  temporary  or emergency  purposes in an amount
not exceeding  one-third of its total  assets.  Please refer to the Statement of
Additional  Information for a further discussion of each Portfolio's  investment
restrictions.

MANAGEMENT

Each Portfolio is a separate portfolio represented by a separate class of common
stock  of IAI  Retirement  Funds,  Inc.,  a  Minnesota  corporation  created  on
September  28,  1993.  Under  Minnesota  law,  the Fund's  Board of Directors is
generally  responsible for the overall management and operation of the Fund. IAI
serves as the  investment  adviser and manager of the  Portfolios  pursuant to a
written  advisory  agreement  (the  "Advisory  Agreement").  IAI also  furnishes
investment  advice  to other  concerns  including  other  investment  companies,
pension  and  profit  sharing  plans,  portfolios  of  foundations,   religious,
educational and charitable institutions, trusts, municipalities and individuals,
having total assets in excess of $11 billion. IAI's ultimate corporate parent is
Lloyds  TSB  Group  plc,  a  publicly-held   financial   services   organization
headquartered  in London,  England.  Lloyds TSB Group plc is one of the  largest
personal and corporate  financial  services  

12
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                                IAI MUTUAL FUNDS
                              -------------------


groups in the  United  Kingdom  and is  engaged  in a wide  range of  activities
including retail and commercial banking. The address of IAI is that of the Fund.

Under the  Advisory  Agreement,  IAI  provides the  Portfolios  with  investment
advice, statistical and research facilities, and certain equipment and services,
including,  but not limited to,  office space and necessary  office  facilities,
equipment, and the services of required personnel. Under the Advisory Agreement,
IAI has the sole  authority and  responsibility  to make and execute  investment
decisions for the Portfolios within the framework of each Portfolio's investment
policies, subject to review by the Board of Directors. As compensation for these
services,  for the fiscal year ended December 31, 1997,  Regional,  Balanced and
Reserve  Portfolios paid IAI an advisory fee at an annual rate of .65%, .65% and
 .45%, respectively, of each Portfolio's average daily net assets.

Each  Portfolio is managed by a team of IAI investment  professionals.  The team
leads are as follows.

Mark Hoonsbeen has responsibility for the management of Regional Portfolio.  Mr.
Hoonsbeen is a Vice President of IAI and has managed Regional Portfolio since he
joined IAI in 1994.  Prior to joining  IAI,  Mr.  Hoonsbeen  served as an equity
portfolio manager for The St. Paul Companies from 1986 to 1994.

   
The team lead for Reserve Portfolio is Larry Hill. Mr. Hill is IAI's Chief Fixed
Income Officer and has managed Reserve Portfolio since March 1998.
    

Balanced  Fund is managed by an  investment  committee  comprised of several IAI
equity and fixed income portfolio managers.

Pursuant to the terms of an  Administrative  Agreement,  IAI also  provides  all
required  administrative,  stock transfer,  redemption,  dividend disbursing and
accounting services, including, for example, the maintenance of each Portfolio's
accounts, books and records, the daily calculation of each Portfolio's net asset
value,  daily and periodic  reports,  all information  necessary to complete tax
returns,  questionnaires  and other  reports  requested by the  Portfolios,  the
maintenance  of stock  registry  records,  the  processing of requested  account
registration changes and redemption requests, and the administration of payments
of dividends and distributions  declared by the Portfolios.  As compensation for
these services, for the fiscal year ended December 31, 1997, each Portfolio paid
IAI an administrative fee at the annual rate of .10% of such Portfolio's average
daily net assets.

In addition to the advisory  fee and the  administrative  fee paid to IAI,  each
Portfolio pays all its other costs and expenses,  including,  for example, costs
incurred in the purchase  and sale of assets,  interest,  taxes,  charges of the
custodian of each Portfolio's assets,  costs of reports and proxy materials sent
to  Portfolio  shareholders,  fees  paid for  independent  accounting  and legal
services,   costs  of  printing  prospectuses  for  Portfolio  shareholders  and
registering each Portfolio's shares,  postage, fees to disinterested  directors,
insurance premiums and costs of attending  investment  conferences.  IAI, in its
discretion,  may  from  time to time  waive  or  reduce  its  management  and/or
administrative  fee or otherwise  reimburse  Fund  operating  expenses.  For the
fiscal year ended December 31, 1997, IAI  voluntarily  agreed to reimburse total
Portfolio  operating expenses which exceeded 1.25% and .85% of the average daily
net assets of Balanced and Reserve Portfolios,  respectively.  Additionally, IAI
has  voluntarily  agreed to waive fees and  expenses  for  Balanced  and Reserve
Portfolios  in excess of 1.25% and 0.85%,  respectively,  of  average  daily net
assets through May 1, 1999.

IAI shall not be liable for any loss  suffered by a Portfolio  in the absence of
willful  misfeasance,  bad faith or gross  negligence in the  performance of its
duties and obligations.

Each  Portfolio  sells its shares to separate  accounts of one or more insurance
companies  unaffiliated  with  IAI.  The Fund  currently  does not  foresee  any
disadvantages to policyowners  arising out of the fact that Portfolio shares are
offered solely to separate accounts of various  insurance  companies to serve as
the investment medium for their variable  products.  Nevertheless,  the Board of
Directors  monitors  events in order to  identify  any  material  irreconcilable
conflicts which may possibly arise, and to determine what action, if any, should
be taken in response to such conflicts. If such a conflict were to occur, one or
more insurance  companies'  separate  accounts might be required to withdraw its
investments  in one or more  Portfolios  and shares of another  Portfolio may be
substituted.  This might force a Portfolio to sell securities at disadvantageous
prices.  In addition,  the Board of  Directors  may refuse to sell shares of any
Portfolio  to any separate  account or may suspend or terminate  the offering of
shares  of any  Portfolio  if  such  action  is  required  by law or  regulatory
authority or is in the best interests of the shareholders of the Portfolio.

INVESTMENT PERFORMANCE

From time to time,  each  Portfolio may  advertise  performance  data  including
monthly,  quarterly,  yearly or cumulative  total return,  average  annual total
return and yield figures.  All such figures are based on historical earnings and
performance  and are not intended to be  indicative of future  performance.  The
investment  return on and principal  value of an investment in a Portfolio  will
fluctuate,  so that an investor's  shares,  when redeemed,  may be worth more or
less than their original cost.

Total return is the change in value of an investment in a Portfolio over a given
period,  assuming  reinvestment of any dividends and capital gains. A cumulative
total  return  reflects  actual  performance  over a stated  period of time.  An
average annual total return is a  hypothetical  rate of return that, if achieved
annually,  would have produced the same  cumulative  total return if performance
had been constant over the entire period.

                                                                              13
<PAGE>
                                IAI MUTUAL FUNDS
                              --------------------

Yield refers to the income  generated  by an  investment  in a Portfolio  over a
given  period  of time,  expressed  as an annual  percentage  rate.  Yields  are
calculated  according  to a  standard  that is  required  for all stock and bond
funds.  Because this differs from other accounting methods, the quoted yield may
not equal the income actually paid to shareholders.

Total returns and yields include the effect of deducting a Portfolio's expenses,
but  may  not  include  charges  and  expenses  attributable  to any  particular
insurance product.  Since shares of the Portfolios may be purchased only through
a variable  annuity or variable life contract,  you should  carefully review the
prospectus of the insurance  product you have chosen for information on relevant
charges and expenses.  Excluding  these charges from quotations of a Portfolio's
performance has the effect of increasing the performance quoted. You should bear
in mind the effect of these charges when comparing a Portfolio's  performance to
that of other mutual funds.

For additional  information  regarding the  calculation of such total return and
yield  figures,  see  "Investment  Performance"  in the  Statement of Additional
Information.  Further  information  about the  performance  of each Portfolio is
contained  in the Fund's  Annual  Report to  shareholders  which may be obtained
without charge from the Fund.

COMPUTATION OF NET ASSET 
VALUE AND PRICING

Each  Portfolio  is open  for  business  each day the New  York  Stock  Exchange
("NYSE") is open.  IAI  normally  calculates  each  Portfolio's  net asset value
("NAV") as of the close of business of the NYSE, normally 3 p.m. Central time.

A Portfolio's NAV is the value of a single share.  The NAV is computed by adding
up the value of a Portfolio's investments,  cash, and other assets,  subtracting
its  liabilities,  and  then  dividing  the  result  by  the  number  of  shares
outstanding.

Each Portfolio's investments with remaining maturities of 60 days or less may be
valued on the basis of  amortized  cost.  This  method  minimizes  the effect of
changes in a security's market value. Other portfolio  securities and assets are
valued  primarily on the basis of market  quotations  or, if quotations  are not
readily available,  by a method that the Board of Directors believes  accurately
reflects fair value.  Foreign  securities  are valued on the basis of quotations
from the primary market in which they are traded,  and are  translated  from the
local currency into U.S. dollars using current exchange rates.

The offering price (price to buy one share) and redemption  price (price to sell
one share) of a Portfolio are a Portfolio's NAV next computed after receipt by a
Portfolio of a purchase or redemption order.

PURCHASE OF SHARES

Investments in the Fund may be made only by separate  accounts  established  and
maintained by insurance  companies for the purpose of funding  variable  annuity
contracts or variable life insurance policies. Please refer to the prospectus of
your insurance  company's  separate  account for information on how to invest in
each  Portfolio.  Investments by separate  accounts in the Fund are expressed in
terms of full and fractional  shares of each  Portfolio.  All investments in the
Portfolios are credited to an insurance  company's separate account  immediately
upon acceptance of the investment by a Portfolio.  Investments will be processed
at the  next  NAV  calculated  after an order  is  received  and  accepted  by a
Portfolio.

The offering of shares of any  Portfolio  may be suspended  for a period of time
and each  Portfolio  reserves the right to reject any specific  purchase  order.
Purchase  orders may be refused  if, in IAI's  opinion,  they are of a size that
would disrupt the management of a Portfolio.

Because you may not purchase shares of a Portfolio directly, you should read the
prospectus of the insurance  company's  separate account to obtain  instructions
for purchasing a variable annuity contract or variable life insurance policy.

REDEMPTION OF SHARES

Shares of any  Portfolio may be redeemed on any business  day.  Redemptions  are
effected at the per share NAV next determined  after the redemption  request has
been accepted by a Portfolio.  Redemption proceeds will normally be wired to the
insurance  company on the next  business  day after  receipt  of the  redemption
instructions  by a  Portfolio  but in no event  later than seven days  following
receipt of  instruction.  Each  Portfolio  may suspend  redemptions  or postpone
payment dates on days when the NYSE is closed (other than weekends or holidays),
when trading on the NYSE is  restricted,  or as permitted by the  Securities and
Exchange Commission.

Please refer to the prospectus of your insurance  company's separate account for
information on how to redeem from each Portfolio.


DIVIDENDS, DISTRIBUTIONS AND 
TAX STATUS

The policy of Reserve  Portfolio is to pay dividends from net investment  income
monthly,  while  Regional and Balanced  Portfolios pay dividends  annually.  The
Portfolios  make  distributions  of realized  capital gains,  if any,  annually.
However,  provisions  in the  Internal  Revenue  Code of 1986,  as amended  (the
"Code"),  may result in  additional  net  investment  income and  capital  gains
distributions by the Portfolios. Such income and capital gains are automatically
reinvested in additional shares of the Portfolios.

The Fund intends to qualify for tax purposes as a regulated  investment  company
under the Code during the current  taxable year. If so qualified,  the Fund will
not be subject  to  federal  income  tax on income  that it  distributes  to its
shareholders.


14
<PAGE>
                                IAI MUTUAL FUNDS
                             ---------------------

It is expected  that  Portfolio  shares will be held under the terms of variable
annuity  contracts or variable life insurance  policies.  Under current tax law,
dividends or capital gains  distributions  from the Portfolios are not currently
taxable when left to accumulate  within a variable  annuity contract or variable
life insurance policy. Depending on the variable contract or policy, withdrawals
may be subject  to  ordinary  tax and,  in  addition,  to a 10%  penalty  tax on
withdrawals before age 59-1/2.

For a discussion of the tax status of your variable contract or policy,  see the
prospectus of your insurance company's separate account. See "Tax Status" in the
Statement of Additional Information for further information. It is suggested you
keep all statements you receive to assist in your personal recordkeeping.
                                       
DESCRIPTION OF COMMON STOCK

All shares of the Portfolios  have equal rights as to redemption,  dividends and
liquidation,  and will be fully paid and nonassessable when issued and will have
no preemptive or conversion rights.

The shares of the Portfolios have noncumulative  voting rights, which means that
the holders of more than 50% of the shares  voting for the election of directors
can elect 100% of the directors if they choose to do so. On some issues, such as
the  election of  directors,  all shares of IAI  Retirement  Funds,  Inc.,  vote
together as one series. On an issue affecting only a particular Portfolio,  such
as  voting on an  Advisory  Agreement,  only the  approval  of that  Portfolio's
shareholders  is required to make the agreement  effective  with respect to such
Portfolio.  An  insurance  company  issuing a variable  contract  or policy that
participates in the Fund will vote shares in the separate account as required by
law and interpretations thereof, as may be amended or changed from time to time.
In accordance  with current law and  interpretations  thereof,  a  participating
insurance company is required to request voting  instructions from contract- and
policyowners  and,  with  certain  exceptions,  must vote shares in the separate
account  in  proportion  to the  voting  instructions  received.  For a  further
discussion,   please  refer  to  your  insurance   company's   separate  account
prospectus.

Annual or periodically  scheduled  regular meetings of shareholders  will not be
held except as required by law.  Minnesota  corporation  law does not require an
annual  meeting;  instead,  it provides  for the Board of  Directors  to convene
shareholder  meetings  when it deems  appropriate.  In  addition,  if a  regular
meeting  of  shareholders  has not been held  during the  immediately  preceding
fifteen months,  shareholders holding three percent or more of the voting shares
of the Fund may demand a regular  meeting of shareholders of the Fund by written
notice of demand  given to the chief  executive  officer or the chief  financial
officer of the Fund.  Within  thirty days after  receipt of the demand by one of
those  officers,  the  Board of  Directors  shall  cause a  regular  meeting  of
shareholders  to be called and held no later than ninety  days after  receipt of
the demand,  all at the expense of the Fund.  An annual  meeting will be held on
the removal of a director or  directors  of the Fund if  requested in writing by
holders of not less than 10% of the outstanding shares of the Fund.

COUNSEL AND AUDITORS

The firm of Dorsey & Whitney LLP, 220 South Sixth Street, Minneapolis, Minnesota
55402,  provides legal counsel for the Fund. KPMG Peat Marwick LLP, 4200 Norwest
Center, Minneapolis, Minnesota 55402, serves as the independent auditors for the
Fund.


CUSTODIAN, TRANSFER AGENT AND 
DIVIDEND DISBURSING AGENT

The  Custodian for the Fund is Norwest Bank  Minnesota,  N.A.,  Norwest  Center,
Sixth  and  Marquette,  Minneapolis,  Minnesota  55479.  IAI acts as the  Fund's
transfer  agent and dividend  disbursing  agent,  at P.O. Box 357,  Minneapolis,
Minnesota 55440.

ADDITIONAL INFORMATION

The investment advisory, transfer agency and administrative services provided to
the Portfolios by IAI depend on the smooth  functioning of its computer systems.
Many computer  software  systems in use today cannot  distinguish  the year 2000
from the year 1900  because of the way dates are  encoded and  calculated.  That
failure could have a negative impact on handling securities trades,  pricing and
account  services.  IAI has been  actively  working on necessary  changes to its
computer systems to deal with the year 2000 and expects that its systems will be
adapted in time for that event, although there cannot be assurance of success.

In the opinion of the staff of the Securities and Exchange  Commission,  the use
of this combined  Prospectus  may possibly  subject all  Portfolios to a certain
amount of liability  for any losses  arising out of any statement or omission in
this  Prospectus  regarding  a  particular  Portfolio.  In  the  opinion  of the
Portfolios'  management,  however,  the risk of such liability is not materially
increased by use of a combined prospectus.

                                                                              15
<PAGE>

                                     [LOGO]
                                  MUTUAL FUNDS

              P.O. Box 357, MINNEAPOLIS, MINNESOTA 55440-0357 USA

                                  800.945.3863

                                  612.376.2700
<PAGE>

                           IAI RETIREMENT FUNDS, INC.

                       Statement of Additional Information
                                dated May 1, 1998


         This  Statement of Additional  Information  is not a  prospectus.  This
Statement of Additional  Information  relates to a Prospectus  dated May 1, 1998
and should be read in  conjunction  therewith.  Copies of the  Prospectus may be
obtained  from the  insurance  companies  whose  separate  accounts may purchase
shares of the Fund.


                                TABLE OF CONTENTS

<TABLE>
<CAPTION>
<S>                                                                        <C>
INVESTMENT OBJECTIVES AND POLICIES..........................................2
INVESTMENT RESTRICTIONS.....................................................14
INVESTMENT PERFORMANCE......................................................16
MANAGEMENT..................................................................18
CUSTODIAL SERVICE...........................................................21
PORTFOLIO TRANSACTIONS AND ALLOCATION OF BROKERAGE..........................21
CAPITAL STOCK...............................................................23
NET ASSET VALUE AND PUBLIC OFFERING PRICE...................................24
TAX STATUS..................................................................25
LIMITATION OF DIRECTOR LIABILITY............................................25
FINANCIAL STATEMENTS........................................................25
Appendix A-- Ratings of Debt Securities....................................A-1
</TABLE>



<PAGE>


                       INVESTMENT OBJECTIVES AND POLICIES

     IAI Retirement Funds,  Inc. (the "Fund") is designed to provide  investment
vehicles for variable annuity contracts and/or variable life insurance  policies
of various insurance companies.

     The investment  objectives and policies of IAI Reserve Portfolio  ("Reserve
Portfolio"),  IAI Balanced  Portfolio  ("Balanced  Portfolio")  and IAI Regional
Portfolio ("Regional  Portfolio")  (individually,  "Portfolio" and collectively,
the  "Portfolios") are summarized on the front page of the Prospectus and in the
text of the Prospectus  under  "Investment  Objectives and Policies."  Investors
should  understand  that all  investments  have a risk  factor.  There can be no
guarantee against loss resulting from an investment in any Portfolio,  and there
can be no assurance that a Portfolio's  investment  policies will be successful,
or that its investment  objectives will be attained.  Certain of the Portfolios'
investment practices are further explained below.

REPURCHASE AGREEMENTS

     Each  Portfolio  may  invest  in  repurchase  agreements  relating  to  the
securities in which it may invest. A repurchase  agreement involves the purchase
of  securities  with the  condition  that,  after a stated  period of time,  the
original seller will buy back the securities at a predetermined  price or yield.
Each  Portfolio's  custodian will have custody of, and will hold in a segregated
account,  securities  acquired by the Portfolio under a repurchase  agreement or
other securities as collateral.  In the case of a security  registered on a book
entry system,  the book entry will be maintained in the Portfolio's name or that
of its custodian.  Repurchase  agreements  involve  certain risks not associated
with  direct  investments  in  securities.  For  example,  if the  seller of the
agreement defaults on its obligation to repurchase the underlying  securities at
a time when the value of the  securities  has declined,  a Portfolio may incur a
loss  upon  disposition  of  such  securities.  In  the  event  that  bankruptcy
proceedings  are  commenced  with  respect  to the  seller of the  agreement,  a
Portfolio's  ability to dispose of the  collateral to recover its investment may
be restricted or delayed. While collateral will at all times be maintained in an
amount equal to the  repurchase  price under the  agreement  (including  accrued
interest due  thereunder),  to the extent  proceeds  from the sale of collateral
were less than the repurchase price, a Portfolio could suffer a loss.

REVERSE REPURCHASE AGREEMENTS

     Each  Portfolio  may invest in reverse  repurchase  agreements as a form of
borrowing. In a reverse repurchase agreement, a Portfolio sells an instrument to
another party, such as a bank or broker-dealer, in return for cash and agrees to
repurchase  the  instrument  at a  particular  price and  time.  While a reverse
repurchase agreement is outstanding,  each Portfolio will comply with guidelines
established by the Securities and Exchange Commission  regarding the segregation
of assets.  Each Portfolio will enter into reverse  repurchase  agreements  only
with parties whose  creditworthiness  has been found  satisfactory by Investment
Advisers,  Inc. ("IAI"),  the Portfolios'  investment adviser and manager.  Such
transactions  may increase  fluctuations  in the market value of the Portfolios'
assets  and may be  viewed  as a form  of  leverage.  Each  Portfolio  does  not
currently intend to invest more than 5% of its net assets in reverse  repurchase
agreements.

SECURITIES OF FOREIGN ISSUERS

     Each  Portfolio may invest in  securities of foreign  issuers in accordance
with its investment objectives and policies. Investing in foreign securities may
result in greater risk than that  incurred by investing in domestic  securities.
There is generally less publicly  available  information  about foreign  issuers
comparable  to reports and ratings  that are  published  about  companies in the
United States.  Also,  foreign issuers are not subject to uniform accounting and
auditing  and  financial   reporting   standards,   practices  and  requirements
comparable to those applicable to United States companies.  Furthermore,  volume
and liquidity in most foreign bond markets in less than in the United States and
at times volatility of price can be greater than in the United States.  There is
generally  less  government  supervision  of foreign bond  markets,  brokers and
companies than in the United States.

                                       2
<PAGE>


     It is  contemplated  that most  foreign  securities  will be  purchased  in
over-the-counter markets or on stock exchanges located in the countries in which
the respective  principal  offices of the issuers of the various  securities are
located,  if that is the  best  available  market.  Foreign  stock  markets  are
generally  not as developed or  efficient as those in the United  States.  While
growing in volume, they usually have substantially less volume than the New York
Stock  Exchange,  and  securities of some foreign  companies are less liquid and
more volatile than securities of comparable United States companies.  Similarly,
volume and  liquidity  in most  foreign  bond markets is less than in the United
States  and at times  volatility  of price  can be  greater  than in the  United
States.  Commissions  on foreign  stock  exchanges  are  generally  higher  than
commissions on United States exchanges, although each Portfolio will endeavor to
achieve the most favorable net results on its portfolio  transactions.  There is
generally less government supervision and regulation of foreign stock exchanges,
brokers and listed companies than in the United States.

     With respect to certain  foreign  countries,  there is the  possibility  of
adverse changes in investment or exchange control regulations,  expropriation or
confiscatory  taxation,  limitations  on the removal of funds or other assets of
the Portfolio, political or social instability, or diplomatic developments which
could affect United States investments in those countries.  Moreover, individual
foreign  economies may differ  favorably or unfavorably  from the United States'
economy in such respects as growth of gross national product, rate of inflation,
capital  reinvestment,   resource   self-sufficiency  and  balance  of  payments
position.

         Each  Portfolio  is not  aware  at this  time of the  existence  of any
investment or exchange control regulations which might substantially  impair the
operations of the Portfolio as described in the Prospectus and this Statement of
Additional  Information.  It should be noted, however, that this situation could
change at any time.

     The dividends and interest  payable on certain of the  Portfolios'  foreign
securities may be subject to foreign  withholding  taxes,  thus reducing the net
amount of income available for distribution to the Portfolios' shareholders. The
expense  ratio of each  Portfolio  should  not be  materially  affected  by such
Portfolio's investment in foreign securities.

U.S. TREASURY INFLATION PROTECTION SECURITIES

     Both the Balanced and Reserve Portfolios may purchase  securities issued by
the United States government,  which include U.S. Treasury  inflation-protection
securities.

     Inflation-protection   securities  are  a  type  of  marketable  book-entry
security issued by the United States Department of Treasury  ("Treasury") with a
nominal  return  linked to the  inflation  rate in prices.  Inflation-protection
securities are auctioned and issued on a quarterly basis on the 15th of January,
April,  July, and October.  They have been issued as 10-year  notes,  with other
maturities  added  thereafter.  The index used to measure  inflation will be the
non-seasonally adjusted U.S. City Average All Items Consumer Price Index for All
Urban Consumers ("CPI-U").

     The value of the principal is adjusted for inflation,  and every six months
the security will pay interest,  which is an amount equal to a fixed  percentage
of the inflation-adjusted value of the principal. The final payment of principal
of the security will not be less than the original par amount of the security at
issuance.

     The  principal  of the  inflation-protection  security  is  indexed  to the
non-seasonally  adjusted  CPI-U. To calculate the  inflation-adjusted  principal
value for a particular valuation date, the value of the principal at issuance is
multiplied by the index ratio applicable to that valuation date. The index ratio
for any date is the ratio of the  reference  CPI  applicable to such date to the
reference CPI applicable to the original issue date.  Semiannual coupon interest
is determined by multiplying the inflation-adjusted principal amount by one-half
of the stated rate of interest on each interest payment date.

                                       3
<PAGE>


     Inflation-adjusted  principal  or the  original  par amount,  whichever  is
larger,  will be paid  on the  maturity  date  as  specified  in the  applicable
offering announcement.  If at maturity the inflation-adjusted  principal is less
than the original  principal value of the security an additional  amount will be
paid at  maturity  so that the  additional  amount  plus the  inflation-adjusted
principal  equals  the  original  principal  amount.  Some  inflation-protection
securities may be stripped into principal and interest  components.  In the case
of a stripped security,  the holder of the stripped principal would receive this
additional  amount.  The final interest payment,  however,  will be based on the
final inflation-adjusted principal value, not the original par amount.

     The reference CPI for the first day of any calendar  month is the CPI-U for
the third preceding calendar month. (For example, the reference CPI for December
1 is the CPI-U  reported for  September  of the same year,  which is released in
October.)  The  reference  CPI for any other day of the month is calculated by a
linear  interpolation  between the reference CPI  applicable to the first day of
the month and the  reference  CPI  applicable  to the first day of the following
month.

     Any revisions the Bureau of Labor Statistics (or successor agency) makes to
any  CPI-U  number  that  has  been  previously  released  will  not be  used in
calculations of the value of outstanding inflation-protection securities. In the
case that the CPI-U for a  particular  month is not  reported by the last day of
the  following  month,  the Treasury  will announce an index number based on the
last  year-over-year  CPI-U  inflation rate available.  Any  calculations of the
Treasury's payment  obligations on the  inflation-protection  security that need
that  month's  CPI-U  number will be based on the index number that the Treasury
has  announced.  If the CPI-U is based to a different  year,  the Treasury  will
continue to use the CPI-U  series based on the base  reference  period in effect
when the  security  was first  issued  as long as that  series  continues  to be
published.    If   the   CPI-U   is   discontinued   during   the   period   the
inflation-protection security is outstanding, the Treasury will, in consultation
with  the  Bureau  of Labor  Statistics  (or  successor  agency),  determine  an
appropriate substitute index and methodology for linking the discontinued series
with the new price index series. Determinations of the Secretary of the Treasury
in this regard are final.

     Inflation-protection  securities  will be held and transferred in either of
two book-entry systems:  the commercial  book-entry system (TRADES) and TREASURY
DIRECT.  The securities will be maintained and transferred at their original par
amount, i.e., not at their  inflation-adjusted  value. STRIPS components will be
maintained  and  transferred  in TRADES at their value based on the original par
amount of the fully constituted security.

LENDING PORTFOLIO SECURITIES

     In order to generate  additional income,  each Portfolio may lend portfolio
securities to broker-dealers,  banks or other financial borrowers of securities.
As with other extensions of credit, there are risks of delay in recovery or even
loss of rights in the  collateral  should the  borrower of the  securities  fail
financially. However, the Portfolios will only enter into loan arrangements with
broker-dealers,  banks  or  other  institutions  which  IAI has  determined  are
creditworthy under guidelines established by the Portfolios' Board of Directors.
The Portfolios may also  experience a loss, if upon the failure of a borrower to
return loaned securities, the collateral is not sufficient in value or liquidity
to cover  the  value  of such  loaned  securities  (including  accrued  interest
thereon).  However,  the Portfolios will receive collateral in the form of cash,
United  States   Government   securities,   certificates  of  deposit  or  other
high-grade, short-term obligations or interest-bearing cash equivalents equal to
at least 102% of the value of the securities loaned. The value of the collateral
and of the securities  loaned will be marked to market on a daily basis.  During
the time  portfolio  securities  are on loan,  the borrower  pays a Portfolio an
amount  equivalent  to any dividends or interest  paid on the  securities  and a
Portfolio  may  invest the cash  collateral  and earn  additional  income or may
receive an agreed upon amount of interest income from the borrower. However, the
amounts  received  by a  Portfolio  may be  reduced  by  finders'  fees  paid to
broker-dealers and related expenses.

                                       4
<PAGE>

EXTENDIBLE NOTES

     Reserve  Portfolio  is  permitted  to  invest up to 25% of the value of its
total assets in extendible notes. An extendible note is a debt arrangement under
which the holder,  at its option,  may require the issuer to repurchase the note
for a  predetermined  fixed  price at one or more  times  prior to the  ultimate
maturity  date of the  note.  Typically,  an  extendible  note is  issued  at an
interest  rate that can be adjusted at fixed times  throughout  its term. At the
same time as the interest rate is adjusted by the issuer, the holder of the note
is  typically  given  the  option  to "put"  the note  back to the  issuer  at a
predetermined  price (e.g.,  at 100% of the  outstanding  principal  amount plus
unpaid  accrued  interest) if the extended  interest rate is  undesirable to the
holder.  This  option to put the note back to the issuer  (i.e.,  to require the
issuer to  repurchase  the note)  provides the holder with an optional  maturity
date that is shorter than the actual maturity date of the note.

     Extendible  notes may be issued with maturity  dates in excess of ten years
from the date of issuance.  However,  if such  extendible  notes  provide for an
optional  maturity date of ten years or less,  then such notes are deemed by the
Portfolio to have been issued for the shorter optional maturity date. Investment
in extendible  notes is not expected to have a material  impact on the effective
portfolio maturity of the Portfolio.

     An investment in an extendible  note is liquid,  and the note may be resold
to another investor prior to its optional maturity date at its market value. The
market  value of an  extendible  note  with a given  optional  maturity  date is
determined  and  fluctuates  in a similar  manner as the market value of a fixed
maturity  note  with a  maturity  equivalent  to the  optional  maturity  of the
extendible  note.  Compared  to fixed  term notes of the same  issuer,  however,
extendible  notes with  equivalent  optional  maturities  generally yield higher
returns without a material increase in risk to the Portfolio.

     The  creditworthiness  of the issuers of extendible  notes is monitored and
rated by Moody's and by S&P, and  investments  by the Reserve  Portfolio in such
extendible notes are restricted to notes with the same investment ratings as are
acceptable  to the  Portfolio  with  respect to other forms of  investment.  The
creditworthiness of such issuers is also monitored by IAI.

VARIABLE OR FLOATING RATE INSTRUMENTS

     Balanced and Reserve  Portfolios may purchase  instruments with variable or
floating  rates.  Such  instruments  (including  notes  purchased  directly from
issuers) bear variable or floating  interest  rates and carry rights that permit
holders to demand payment of the unpaid principal  balance plus accrued interest
from the issuers or certain financial  intermediaries.  Floating rate securities
have interest rates that change  whenever there is a change in a designated base
rate while variable rate instruments provide for a specified periodic adjustment
in the interest  rate.  These  formulas are designed to result in a market value
for the instrument that approximates its par value.

WHEN-ISSUED/DELAYED-DELIVERY TRANSACTIONS

     Reserve  and  Balanced   Portfolios  may  buy  and  sell  securities  on  a
delayed-delivery  or when-issued basis. These transactions  involve a commitment
by a Portfolio to purchase or sell specific  securities at a predetermined price
or yield, with payment and delivery taking place after the customary  settlement
period  for that type of  security  (and more than  seven  days in the  future).
Typically, no interest accrues to the purchaser until the security is delivered.
Each Portfolio may receive fees for entering into delayed-delivery transactions.

     When purchasing securities on a delayed-delivery basis, a Portfolio assumes
the  rights  and  risks of  ownership,  including  the risk of price  and  yield
fluctuations.  Because a Portfolio is not required to pay for  securities  until
the delivery date, these risks are in addition to the risks associated with such
Portfolio's  other  investments.  If a  Portfolio  remains  substantially  fully
invested  at  a  time  when  delayed   delivery   purchases   are   outstanding,
delayed-delivery   purchases   may   result   in  a  form  of   leverage.   When
delayed-delivery   purchases  are  outstanding,   a  Portfolio  will  set  aside
appropriate  liquid  assets  in a  segregated  custodial  account  to cover  its
purchase obligations. When a Portfolio has sold a security on a delayed-delivery
basis,  such  Portfolio  does not  participate  in further  gains or losses with
respect to the security.  If the other party to a  delayed-delivery  transaction

                                       5
<PAGE>

fails to deliver or pay for the  securities,  a Portfolio could miss a favorable
price or yield opportunity, or could suffer a loss.

     Such Portfolios may renegotiate  delayed-delivery  transactions  after they
are entered into, and may sell underlying  securities before they are delivered,
which may result in capital gains or losses.

MORTGAGE-BACKED SECURITIES

     Reserve and Balanced  Portfolios  may purchase  mortgage-backed  securities
issued  by  government  and  non-government  entities  such as  banks,  mortgage
lenders, or other financial institutions.  A mortgage-backed  security may be an
obligation  of the issuer  backed by a mortgage or pool of mortgages or a direct
interest in an underlying pool of mortgages.  Some  mortgage-backed  securities,
such as  collateralized  mortgage  obligations  or CMOs,  make  payments of both
principal  and  interest  at a variety  of  intervals;  others  make  semiannual
interest payments at a predetermined  rate and repay principal at maturity (like
a typical  bond).  Mortgage-backed  securities  are based on different  types of
mortgages  including those on commercial real estate or residential  properties.
Other  types of  mortgage-backed  securities  will  likely be  developed  in the
future,  and  each  Portfolio  may  invest  in them if IAI  determines  they are
consistent with such Portfolio's investment objectives and policies.

     The value of  mortgage-backed  securities  may  change due to shifts in the
market's  perception  of issuers.  In  addition,  regulatory  or tax changes may
adversely  affect  the  mortgage  securities  market as a whole.  Non-government
mortgage-backed  securities  may  offer  higher  yields  than  those  issued  by
government  entities,  but also may be  subject to greater  price  changes  than
government  issues.  Mortgage-backed  securities are subject to prepayment risk.
Prepayment,  which  occurs when  unscheduled  or early  payments are made on the
underlying  mortgages,  may shorten the effective maturities of these securities
and may lower their total returns.

STRIPPED MORTGAGE-BACKED SECURITIES

     Reserve  Portfolio may purchase  stripped  mortgage-back  securities.  Such
securities are created when a U.S. government agency or a financial  institution
separates the interest and principal  components of a  mortgage-backed  security
and sells them as  individual  securities.  The  holder of the  "principal-only"
security  (PO)  receives  the   principal   payments  made  by  the   underlying
mortgage-backed  security, while the holder of the "interest-only" security (IO)
receives  interest  payments from the same  underlying  security.  The prices of
stripped  mortgage-backed  securities may be particularly affected by changes in
interest rates. As interest rates fall, prepayment rates tend to increase, which
tends to reduce prices of IOs and increase  prices of POs. Rising interest rates
can have the opposite effect.

ASSET-BACKED SECURITIES

     Reserve and  Balanced  Portfolios  may  purchase  asset-backed  securities.
Asset-backed   securities   represent  interests  in  pools  of  consumer  loans
(generally unrelated to mortgage loans) and often are structured as pass-through
securities.  Interest and principal payments  alternately depend upon payment of
the underlying loans by individuals, although the securities may be supported by
letters  of  credit or other  credit  enhancements.  The  value of  asset-backed
securities may also depend on the  creditworthiness  of the servicing  agent for
the loan  pool,  the  originator  of the  loans,  or the  financial  institution
providing the credit enhancement.

ZERO COUPON BONDS

     Reserve and Balanced Portfolios may purchase zero coupon bonds. Zero coupon
bonds do not make interest payments;  instead,  they are sold at a deep discount
from their face value and are redeemed at face value when they  mature.  Because
zero coupon bonds do not pay current  income,  their prices can be very volatile
when interest rates change. In calculating its dividends, a Portfolio takes into
account  as income a portion  of the  difference  between a zero  coupon  bond's
purchase price and its face value.

                                       6
<PAGE>

     A  broker-dealer  creates a derivative  zero by separating the interest and
principal  components  of a U.S.  Treasury  security  and  selling  them  as two
individual  securities.  CATS (Certificates of Accrual on Treasury  Securities),
TIGRs (Treasury  Investment  Growth Receipts),  and TRs (Treasury  Receipts) are
examples of derivative zeros.

     The Federal  Reserve Bank creates  STRIPS  (Separate  Trading of Registered
Interest and Principal of  Securities)  by separating the interest and principal
components of an outstanding  U.S.  Treasury bond and selling them as individual
securities. Bonds issued by the Resolution Funding Corporation (REFCORP) and the
Financing  Corporation  (FICO) can also be separated in this  fashion.  Original
issue  zeroes  are  zero  coupon  securities   originally  issued  by  the  U.S.
government, a government agency, or a corporation in zero coupon form.

LOWER-RATED DEBT SECURITIES

     Reserve and Balanced  Portfolios may invest in lower-rated debt securities.
Issuers  of high  yield  securities  may be  highly  leveraged  and may not have
available to them more traditional  methods of financing.  Therefore,  the risks
associated  with acquiring the securities of such issuers  generally are greater
than is the case with higher rated securities.  For example,  during an economic
downturn or a sustained  period of rising interest rates,  issuers of high yield
securities may be more likely to experience financial stress, especially if such
issuers are highly  leveraged.  During such  periods,  such issuers may not have
sufficient  revenues to meet their interest  payment  obligations.  The issuer's
ability  to service  its debt  obligations  also may be  adversely  affected  by
specific  issuer  developments  or  the  issuer's  inability  to  meet  specific
projected business forecasts or the unavailability of additional financing.  The
risk of loss due to  default  by the  issuer is  significantly  greater  for the
holders of high yield  securities  because such  securities may be unsecured and
may be subordinated to other creditors of the issuer.

     High yield  securities  frequently  have call or redemption  features which
would permit an issuer to repurchase  the security  from a Portfolio.  If a call
were  exercised by the issuer  during a period of declining  interest  rates,  a
Portfolio  likely  would  have to  replace  such  called  security  with a lower
yielding security,  thus decreasing the net investment income to a Portfolio and
dividends to shareholders.

     A Portfolio may have difficulty  disposing of certain high yield securities
because there may be a thin trading  market for such  securities.  The secondary
trading  market  for high yield  securities  is  generally  not as liquid as the
secondary market for higher rated securities. Reduced secondary market liquidity
may have an adverse impact on market price and a Portfolio's  ability to dispose
of particular issues when necessary to meet such Portfolio's  liquidity needs or
in  response  to a  specific  economic  event  such  as a  deterioration  in the
creditworthiness of the issuer.

     Adverse  publicity  and  investor  perceptions,  which  may not be based on
fundamental  analysis,  also may decrease the value and  liquidity of high yield
securities,  particularly in a thinly traded market. Factors adversely affecting
the market  value of high yield  securities  are  likely to  adversely  affect a
Portfolio's  net asset value.  In  addition,  a Portfolio  may incur  additional
expenses  to the  extent it is  required  to seek  recovery  upon a default on a
portfolio holding or participate in the restructuring of the obligation.

ILLIQUID SECURITIES

     Each  Portfolio  may also invest up to 15% of its net assets in  securities
that are  considered  illiquid  because of the  absence  of a readily  available
market or due to legal or contractual restrictions.  However, certain restricted
securities  that are not  registered for sale to the general public but that can
be resold to  institutional  investors  may be  considered  liquid  pursuant  to
guidelines  adopted  by the  Board  of  Directors.  In the  case of a Rule  144A
Security, such security is deemed to be liquid if:

                                       7
<PAGE>


     (1) IAI reasonably expects to be able to resell the security to a qualified
institutional  buyer, as defined in paragraph  (a)(1) of Rule 144A, who is aware
of the  Portfolio's  reliance  upon Rule 144A in selling  the  security  without
registration, as required by paragraph (d)(2) of Rule 144A;

     (2) the  Rule  144A  Security  is not (a) of the same  class as  securities
listed on any  national  securities  exchange or quoted in NASDAQ as  determined
under  paragraph  (d)(3)(i)  of Rule  144A,  or (b) a security  of a  registered
investment company (other than a closed-end investment company); and

     (3) the issuer (a) is a foreign government  eligible to register securities
under  Schedule B of the  Securities  Act of 1933,  (b) is a company  that files
periodic  reports under the Securities  Act of 1934 on Forms 8-K, 10-Q,  10-K or
20-F or provides information under Rule 12g3-2(b) thereunder,  or (c) has agreed
in writing to provide the holder and any prospective  purchaser of the Rule 144A
Security  with  reasonably  current  financial  information  as  required  under
paragraph (d)(4)(i) of Rule 144A.

     Other  securities  are  deemed  to be  liquid  if IAI  determines  that the
security can be disposed of within seven days in the ordinary course of business
at  approximately  the amount at which the Portfolios have valued the instrument
for  purposes of  calculating  a  Portfolio's  net asset  value.  In making this
determination,  IAI  will  consider  such  factors  as  may  be  relevant  to  a
Portfolio's  ability to dispose of the  security,  including but not limited to,
the following  factors (none of which,  standing  alone,  would  necessarily  be
determinative):

     1. the frequency of trades and quotes for the security;

     2. the number of dealers  willing to purchase or sell the  security and the
number of potential purchasers;

     3. dealer undertakings to make a market in the security; and

     4. the  nature of the  security  and the nature of the  marketplace  trades
(e.g.,  the time  needed to dispose of the  security,  the method of  soliciting
offers and the mechanics of transfer).

     It is  not  possible  to  predict  with  assurance  the  maintenance  of an
institutional  trading  market  for  such  securities  and  the  liquidity  of a
Portfolio's investments could be impaired if trading declines.

DOLLAR ROLLS

     In connection  with its ability to purchase  securities on a when-issued or
forward  commitment  basis,  a Portfolio may enter into "dollar  rolls" in which
such  Portfolio  sells   securities  for  delivery  in  the  current  month  and
simultaneously  contracts with the same counterparty to repurchase similar (same
type,  coupon and maturity) but not identical  securities on a specified  future
date. A Portfolio  gives up the right to receive  principal and interest paid on
the securities  sold.  However,  a Portfolio  would benefit to the extent of any
difference  between the price received for the securities sold and lower forward
price  for the  futures  purchase  plus any fee  income  received.  Unless  such
benefits  exceed  the  income  and  capital  appreciation  that  would have been
realized  on the  securities  sold as part of the dollar  roll,  the use of this
technique will diminish the investment  performance of a Portfolio compared with
what such  performance  would have been  without the use of dollar  rolls.  Each
Portfolio  will hold and maintain in a segregated  account until the  settlement
date  appropriate  liquid  assets  in an  amount  equal  to  the  value  of  the
when-issued or forward commitment securities.  The benefits derived from the use
of dollar rolls may depend,  among other  things,  upon IAI's ability to predict
interest  rates  correctly.  There is no  assurance  that  dollar  rolls  can be
successfully employed. In addition, the use of dollar rolls by a Portfolio while
remaining  substantially  fully  invested  increases the amount of a Portfolio's
assets that are  subject to market  risk to an amount that is greater  than such
Portfolio's net asset value,  which could result in increased  volatility of the
price of such Portfolio's shares.

                                       8
<PAGE>

SWAP AGREEMENTS

     Regional  and  Balanced  Portfolios  may  engage in swap  agreements.  Swap
agreements can be individually  negotiated and structured to include exposure to
a variety of different  types of  investments  or market  factors.  Depending on
their structure, swap agreements may increase or decrease the Fund's exposure to
long- or short-term  interest  rates (in the U.S. or abroad),  foreign  currency
values, mortgage securities, corporate borrowing rates, or other factors such as
security  prices or inflation  rates.  Swap  agreements  can take many different
forms and are known by a variety of names.  Each Portfolio is not limited to any
particular  form of swap agreement if IAI determines it is consistent  with such
Portfolio's investment objectives and policies.

     Swap agreements will tend to shift a Portfolio's  investment  exposure from
one type of  investment  to  another.  For  example,  if a  Portfolio  agrees to
exchange  payments  in  dollars  for  payments  in  foreign  currency,  the swap
agreement  would tend to decrease  such  Portfolio's  exposure to U.S.  interest
rates and  increase  its  exposure  to  foreign  currency  and  interest  rates.
Depending  on how they are used,  swap  agreements  may increase or decrease the
overall volatility of a Portfolio's investments and its share price.

     The most  significant  factor in the  performance of swap agreements is the
change in the specific interest rate, currency,  or other factors that determine
the amounts of payments due to and from a Portfolio.  If a swap agreement  calls
for  payments  by a  Portfolio,  such  Portfolio  must be  prepared to make such
payments when due. In addition, if the counterparty's creditworthiness declined,
the value of a swap agreement would be likely to decline,  potentially resulting
in losses.  Each  Portfolio  expects to be able to eliminate its exposure  under
swap agreements either by assignment or other  disposition,  or by entering into
an offsetting  swap  agreement  with the same party or a similarly  creditworthy
party.

     Each  Portfolio  will  maintain  appropriate  liquid assets in a segregated
custodial account to cover its current  obligations under swap agreements.  If a
Portfolio  enters into a swap agreement on a net basis, it will segregate assets
with a daily  value at least equal to the  excess,  if any, of such  Portfolio's
accrued  obligations  under  the swap  agreement  over the  accrued  amount  the
Portfolio is entitled to receive under the agreement. If a Portfolio enters into
a swap  agreement  on other than a net basis,  it will  segregate  assets with a
value equal to the full amount of a Portfolio's  accrued  obligations  under the
agreement.

INDEXED SECURITIES

     Each  Portfolio  may  purchase  securities  whose prices are indexed to the
prices of other securities,  securities indexes, currencies,  precious metals or
other commodities, or other financial indicators.  Indexed securities typically,
but not  always,  are debt  securities  or  deposits  whose value at maturity or
coupon rate is  determined  by reference to a specific  instrument or statistic.
Gold-indexed  securities,  for example,  typically  provide for a maturity value
that depends on the price of gold,  resulting in a security whose price tends to
rise and fall together with gold prices.  Currency-indexed  securities typically
are short-term to  intermediate-term  debt  securities  whose maturity values or
interest  rates  are  determined  by  reference  to the  values  of one or  more
specified   foreign   currencies,   and  may  offer  higher   yields  than  U.S.
dollar-denominated securities of equivalent issuers. Currency-indexed securities
may be positively  or  negatively  indexed;  that is, their  maturity  value may
increase when the specified  currency value  increases,  resulting in a security
that performs similarly to a foreign-denominated  instrument,  or their maturity
value may decline  when  foreign  currencies  increase,  resulting in a security
whose price  characteristics  are similar to a put on the  underlying  currency.
Currency-indexed  securities may also have prices that depend on the values of a
number of different foreign currencies relative to each other.

     The  performance  of indexed  securities  depends to a great  extent on the
performance  of the security,  currency,  or other  instrument to which they are
indexed,  and may also be  influenced  by interest  rate changes in the U.S. and
abroad.  At the same time,  indexed  securities  are subject to the credit risks
associated  with the  issuer of the  security,  and  their  values  may  decline
substantially if the issuer's creditworthiness  deteriorates.  Recent issuers of
indexed  securities  have  included  banks,   corporations,   and  certain  U.S.
government  agencies.  IAI will use its judgment in determining  whether indexed
securities should be treated as short-term  instruments,  bonds, stocks, or as a
separate  asset class for  purposes  of each  Portfolio's  investment  policies,
depending  on  the  individual   characteristics  of  the  securities.   Indexed
securities may be more volatile than the underlying instruments.

                                       9
<PAGE>

FOREIGN CURRENCY TRANSACTIONS

     Each Portfolio may hold foreign currency deposits from time to time and may
convert dollars and foreign currencies in the foreign exchange markets. Currency
conversion involves dealer spreads and other costs, although commissions usually
are not charged. Currencies may be exchanged on a spot (i.e., cash) basis, or by
entering  into forward  contracts to purchase or sell  foreign  currencies  at a
future date and price.  Forward  contracts  generally are traded in an interbank
market  conducted  directly  between  currency traders (usually large commercial
banks)  and their  customers.  The  parties to a forward  contract  may agree to
offset or terminate the contract  before its maturity,  or may hold the contract
to maturity and complete the contemplated currency exchange.

     Each Portfolio may use currency forward  contracts to manage currency risks
and to facilitate  transactions in foreign securities.  The following discussion
summarizes  the  principal  currency  management  strategies  involving  forward
contracts that could be used by the Portfolios.

     In connection with purchases and sales of securities denominated in foreign
currencies,  each Portfolio may enter into currency  forward  contracts to fix a
definite  price for the  purchase or sale in advance of the  trade's  settlement
date.  This  technique  is  sometimes  referred  to as a  "settlement  hedge" or
"transaction  hedge." IAI expects to enter into settlement  hedges in the normal
course of managing each Portfolio's  foreign  investments.  Each Portfolio could
also enter into  forward  contracts  to purchase  or sell a foreign  currency in
anticipation of future  purchases or sales of securities  denominated in foreign
currency, even if the specific investments have not yet been selected by IAI.

     Each Portfolio may also use forward contracts to hedge against a decline in
the value of existing investments  denominated in foreign currency. For example,
if a Portfolio owned securities  denominated in pounds sterling,  it could enter
into a forward  contract to sell pounds  sterling in return for U.S.  dollars to
hedge against possible  declines in the pound's value.  Such a hedge,  sometimes
referred  to as a  "position  hedge,"  would tend to offset  both  positive  and
negative  currency  fluctuations but would not offset changes in security values
caused by other factors. Each Portfolio could also hedge the position by selling
another  currency  expected to perform  similarly  to the pound  sterling -- for
example,  by entering into a forward  contract to sell  Deutschmarks or European
Currency  Units in  return  for U.S.  dollars.  This  type of  hedge,  sometimes
referred to as a "proxy hedge," could offer advantages in terms of cost,  yield,
or efficiency, but generally would not hedge currency exposure as effectively as
a simple  hedge  into U.S.  dollars.  Proxy  hedges  may result in losses if the
currency  used to hedge does not perform  similarly to the currency in which the
hedged securities are denominated.

     Under certain conditions,  SEC guidelines require mutual funds to set aside
appropriate  liquid assets in a segregated  custodial  account to cover currency
forward contracts. As required by SEC guidelines,  the Portfolios will segregate
assets to cover currency forward contracts, if any, whose purpose is essentially
speculative. Each Portfolio will not segregate assets to cover forward contracts
entered into for hedging purposes, including settlement hedges, position hedges,
and proxy hedges.

     Successful use of forward currency  contracts will depend on IAI's skill in
analyzing and predicting  currency values.  Forward  contracts may substantially
change the  Portfolios'  investment  exposure  to changes in  currency  exchange
rates, and could result in losses to the Portfolios if currencies do not perform
as IAI anticipates.  For example,  if a currency's value rose at a time when IAI
had hedged a Portfolio  by selling that  currency in exchange for dollars,  such
Portfolio would be unable to participate in the currency's appreciation.  If IAI
hedges  currency  exposure  through  proxy  hedges,  a Portfolio  could  realize
currency losses from the hedge and the security position at the same time if the
two currencies do not move in tandem.  Similarly, if IAI increases a Portfolio's
exposure  to a  foreign  currency,  and that  currency's  value  declines,  such
Portfolio  will realize a loss.  There is no assurance that IAI's use of forward
currency  contracts will be advantageous to the Portfolios or that it will hedge
at  an   appropriate   time.   The  policies   described  in  this  section  are
non-fundamental policies of the Portfolios.

                                       10
<PAGE>

LIMITATIONS ON FUTURES AND OPTIONS TRANSACTIONS

     Each  Portfolio has filed a notice of  eligibility  for exclusion  from the
definition of the term  "commodity  pool  operator"  with the Commodity  Futures
Trading Commission (CFTC) and the National Futures  Association,  which regulate
trading in the futures  markets,  before  engaging in any  purchases or sales of
futures  contracts or options on futures  contracts.  Each Portfolio  intends to
comply with Section 4.5 of the  regulations  under the  Commodity  Exchange Act,
which  limits the extent to which the  Portfolios  can commit  assets to initial
margin deposits and option premiums.

     The above  limitations on the Portfolios'  investments in futures contracts
and options,  and the  Portfolios'  policies  regarding  futures  contracts  and
options discussed  elsewhere in this Statement of Additional  Information may be
changed as regulatory  agencies  permit.  With respect to positions in commodity
futures or commodity  option  contracts which do not come within the meaning and
intent of bona fide hedging in the CFTC rules, the aggregate  initial margin and
premiums  required to establish  such  positions will not exceed five percent of
the liquidation  value of the Portfolios,  after taking into account  unrealized
profits and unrealized  losses on any such  contracts it has entered into;  and,
provided  further,  that in the case of an  option  that is  in-the-money,  such
amount may be excluded in computing such five percent.

FUTURES CONTRACTS

     When a  Portfolio  purchases  a futures  contract,  it agrees to purchase a
specified  underlying  instrument at a specified  future date.  When a Portfolio
sells a  futures  contract,  it agrees to sell the  underlying  instrument  at a
specified  future date. The price at which the purchase and sale will take place
is fixed when a Portfolio  enters into the contract.  Some  currently  available
futures contracts are based on specific securities,  such as U.S. Treasury bonds
or notes,  and some are  based on  indexes  of  securities  prices,  such as the
Standard & Poor's 500 Composite Stock Price Index (S&P 500). Futures can be held
until  their  delivery  dates,  or can be  closed  out  before  then if a liquid
secondary market is available.

     The value of a futures  contract  tends to increase  and decrease in tandem
with the  value of its  underlying  instrument.  Therefore,  purchasing  futures
contracts will tend to increase a Portfolio's  exposure to positive and negative
price fluctuations in the underlying instrument, much as if it had purchased the
underlying  instrument directly.  When a Portfolio sells a futures contract,  by
contrast,  the value of its  futures  position  will tend to move in a direction
contrary to the  market.  Selling  futures  contracts,  therefore,  will tend to
offset  both  positive  and  negative  market  price  changes,  much  as if  the
underlying instrument had been sold.

FUTURES MARGIN PAYMENTS

     The purchaser or seller of a futures contract is not required to deliver or
pay for the underlying instrument unless the contract is held until the delivery
date.  However,  both the purchaser and seller are required to deposit  "initial
margin" with a futures  broker,  known as a futures  commission  merchant (FCM),
when the contract is entered into.  Initial margin  deposits are typically equal
to a percentage of the contract's value. If the value of either party's position
declines,  that party will be required  to make  additional  "variation  margin"
payments  to settle the change in value on a daily  basis.  The party that has a
gain may be  entitled to receive  all or a portion of this  amount.  Initial and
variation margin payments do not constitute  purchasing securities on margin for
purposes  of  the  Portfolios'  investment  limitations.  In  the  event  of the
bankruptcy of an FCM that holds margin on behalf of a Portfolio,  such Portfolio
may be entitled to return of margin owed to it only in  proportion to the amount
received by the FMC's other customers,  potentially  resulting in losses to such
Portfolio.

                                       11
<PAGE>

PURCHASING PUT AND CALL OPTIONS

     By  purchasing  a put option,  a  Portfolio  obtains the right (but not the
obligation) to sell the option's underlying  instrument at a fixed strike price.
In return for this right,  a Portfolio  pays the  current  market  price for the
option (known as the option  premium).  Options have various types of underlying
instruments,  including specific  securities,  indexes of securities prices, and
futures contracts. A Portfolio may terminate its position in a put option it has
purchased by allowing it to expire or by exercising the option. If the option is
allowed to  expire,  a  Portfolio  will lose the  entire  premium it paid.  If a
Portfolio  exercises  the  option,  it  completes  the  sale  of the  underlying
instrument  at the strike  price.  A Portfolio  may also  terminate a put option
position by closing it out in the secondary  market at its current  price,  if a
liquid secondary market exists.

     The buyer of a typical  put option can expect to realize a gain if security
prices fall substantially.  However,  if the underlying  instrument's price does
not fall enough to offset the cost of  purchasing  the  option,  a put buyer can
expect to suffer a loss (limited to the amount of the premium paid, plus related
transaction costs).

     The  features  of call  options  are  essentially  the same as those of put
options,  except  that the  purchaser  of a call  option  obtains  the  right to
purchase,  rather than sell,  the underlying  instrument at the option's  strike
price.  A call buyer  typically  attempts  to  participate  in  potential  price
increases  of the  underlying  instrument  with risk  limited to the cost of the
option if security prices fall. At the same time, the buyer can expect to suffer
a loss if  security  prices do not rise  sufficiently  to offset the cost of the
option.

WRITING PUT AND CALL OPTIONS

     When a Portfolio  writes a put option,  it takes the  opposite  side of the
transaction from the option's purchaser. In return for receipt of the premium, a
Portfolio  assumes  the  obligation  to pay the  strike  price for the  option's
underlying  instrument if the other party to the option  chooses to exercise it.
When  writing an option on a futures  contract a Portfolio  would be required to
make margin  payments to an FCM as described above for futures  contracts.  Each
Portfolio  may seek to terminate  its position in a put option it writes  before
exercise by closing out the option in the secondary market at its current price.
If the secondary  market is not liquid for a put option a Portfolio has written,
however,  such  Portfolio  must  continue to be prepared to pay the strike price
while the option is outstanding,  regardless of price changes, and must continue
to set aside assets to cover its position. If security prices rise, a put writer
would  generally  expect to  profit,  although  its gain would be limited to the
amount of the premium it received.

     If security  prices remain the same over time, it is likely that the writer
will also  profit,  because it should be able to close out the option at a lower
price.  If security  prices fall,  the put writer would expect to suffer a loss.
This loss should be less than the loss from purchasing the underlying instrument
directly,  however,  because the premium  received for writing the option should
mitigate the effects of the decline.

     Writing a call option obligates a Portfolio to sell or deliver the option's
underlying  instrument,  in return for the strike  price,  upon  exercise of the
option.  The  characteristics  of writing  call  options are similar to those of
writing put  options,  except  that  writing  calls  generally  is a  profitable
strategy  if prices  remain  the same or fall.  Through  receipt  of the  option
premium,  a call writer  mitigates the effects of a price  decline.  At the same
time,  because  a call  writer  must  be  prepared  to  deliver  the  underlying
instrument in return for the strike price, even if its current value is greater,
a call writer gives up some ability to participate in security price increases.

COMBINED POSITIONS

     Each  Portfolio  may purchase and write  options in  combination  with each
other, or in combination with futures or forward  contracts,  to adjust the risk
and return  characteristics of the overall position. For example, each Portfolio
may  purchase  a put  option  and  write a call  option  on the same  underlying
instrument,  in order to  construct  a combined  position  whose risk and return
characteristics  are  similar to selling a futures  contract.  Another  possible
combined  position  would involve  writing a call option at one strike price and
buying a call  option  at a lower  price,  in order  to  reduce  the risk of the
written  call  option  in the event of a  substantial  price  increase.  Because
combined  options  positions  involve  multiple  trades,  they  result in higher
transaction costs and may be more difficult to open and close out.

                                       12
<PAGE>

CORRELATION OF PRICE CHANGES

     Because there are a limited number of types of exchange-traded  options and
futures contracts,  it is likely that the standardized  contracts available will
not  match a  Portfolio's  current  or  anticipated  investments  exactly.  Each
Portfolio may invest in options and futures  contracts  based on securities with
different issuers,  maturities,  or other characteristics from the securities in
which it typically  invests,  which  involves a risk that the options or futures
position will not track the performance of such Portfolio's other investments.

     Options  and  futures  prices  can also  diverge  from the  prices of their
underlying  instruments,  even if the underlying instruments match a Portfolio's
investments  well.  Options and futures  prices are  affected by such factors as
current and anticipated  short-term interest rates, changes in volatility of the
underlying instrument,  and the time remaining until expiration of the contract,
which may not affect  security  prices the same way.  Imperfect  correlation may
also result from differing  levels of demand in the options and futures  markets
and the  securities  markets,  from  structural  differences  in how options and
futures and securities are traded, or from imposition of daily price fluctuation
limits or trading halts. Each Portfolio may purchase or sell options and futures
contracts  with a greater or lesser value than the securities it wishes to hedge
or intends to  purchase in order to attempt to  compensate  for  differences  in
volatility  between the contract and the  securities,  although  this may not be
successful in all cases.  If price  changes in a Portfolio's  options or futures
positions are poorly  correlated with its other  investments,  the positions may
fail to  produce  anticipated  gains or result in losses  that are not offset by
gains in other investments.

LIQUIDITY OF OPTIONS AND FUTURES CONTRACTS

     There  is no  assurance  a  liquid  secondary  market  will  exist  for any
particular  options or futures contract at any particular time. Options may have
relatively low trading volume and liquidity if their strike prices are not close
to the  underlying  instrument's  current  price.  In  addition,  exchanges  may
establish daily price fluctuation limits for options and futures contracts,  and
may halt  trading if a contract's  price moves upward or downward  more than the
limit in a given day. On volatile trading days when the price  fluctuation limit
is reached or a trading halt is imposed, it may be impossible for a Portfolio to
enter into new  positions  or close out  existing  positions.  If the  secondary
market for a  contract  is not liquid  because  of price  fluctuation  limits or
otherwise,  it could prevent prompt  liquidation of unfavorable  positions,  and
potentially  could  require a Portfolio  to  continue  to hold a position  until
delivery  or  expiration  regardless  of changes in its  value.  As a result,  a
Portfolio's  access  to  other  assets  held to cover  its  options  or  futures
positions could also be impaired.

OTC OPTIONS

     Unlike exchange-traded  options, which are standardized with respect to the
underlying  instrument,  expiration  date,  contract size, and strike price, the
terms of  over-the-counter  options (options not traded on exchanges)  generally
are established through negotiation with the other party to the option contract.
While this type of arrangement allows a Portfolio greater  flexibility to tailor
an option to its needs, OTC options  generally  involve greater credit risk than
exchange-traded  options,  which are guaranteed by the clearing  organization of
the exchanges where they are traded.

OPTIONS AND FUTURES RELATING TO FOREIGN CURRENCIES

     Currency  futures  contracts  are  similar  to  forward  currency  exchange
contracts,   except  that  they  are  traded  on  exchanges   (and  have  margin
requirements)  and are  standardized as to contract size and delivery date. Most
currency  futures  contracts call for payment or delivery in U.S.  dollars.  The
underlying  instrument  of a currency  option may be a foreign  currency,  which
generally is purchased  or delivered in exchange for U.S.  dollars,  or may be a
futures contract. The purchaser of a currency call obtains the right to purchase
the underlying  currency,  and the purchaser of a currency put obtains the right
to sell the underlying currency.

                                       13
<PAGE>


     The uses and risks of  currency  options and futures are similar to options
and futures  relating  to  securities  or  indexes,  as  discussed  above.  Each
Portfolio  may  purchase  and sell  currency  futures and may purchase and write
currency  options to increase  or decrease  its  exposure to  different  foreign
currencies.  Each  Portfolio  may also  purchase and write  currency  options in
conjunction  with each other or with  currency  futures  or  forward  contracts.
Currency  futures and options  values can be expected to correlate with exchange
rates,  but may not reflect other factors that affect the value of a Portfolio's
investments.  A currency hedge,  for example,  should protect a  Yen-denominated
security  from a decline in the Yen, but will not protect a Portfolio  against a
price decline  resulting from  deterioration  in the issuer's  creditworthiness.
Because the value of a Portfolio's  foreign-denominated  investments  changes in
response to many factors  other than exchange  rates,  it may not be possible to
match the amount of currency  options and futures to the value of a  Portfolio's
investments exactly over time.

ASSET COVERAGE FOR FUTURES AND OPTIONS POSITIONS

     Each  Portfolio will comply with  guidelines  established by the Securities
and  Exchange  Commission  with  respect  to  coverage  of options  and  futures
strategies  by mutual  funds,  and if the  guidelines  so require will set aside
appropriate  liquid  assets in a  segregated  custodial  account  in the  amount
prescribed.  Securities  held in a segregated  account  cannot be sold while the
futures or option strategy is  outstanding,  unless they are replaced with other
suitable assets. As a result, there is a possibility that segregation of a large
percentage  of a  Portfolio's  assets could impede  portfolio  management or the
Portfolio's ability to meet redemption requests or other current obligations.

                             INVESTMENT RESTRICTIONS

     As  indicated  in the  Prospectus,  each  Portfolio  is  subject to certain
policies and restrictions which are "fundamental" and may not be changed without
shareholder  approval.  Shareholder  approval  consists  of the  approval of the
lesser of (i) more than 50% of the outstanding voting securities of a Portfolio,
or (ii) 67% or more of the voting securities present at a meeting if the holders
of more than 50% of the outstanding voting securities of a Portfolio are present
or  represented by proxy.  Limitations 1 through 8 below are deemed  fundamental
limitations for each Portfolio.  The remaining limitations set forth below serve
as  operating  policies  of each  Portfolio  and may be  changed by the Board of
Directors without shareholder approval.

     Each Portfolio may not:

     1. Purchase the  securities of any issuer if such purchase  would cause the
Portfolio to fail to meet the requirements of a "diversified company" as defined
under the Investment Company Act of 1940, as amended (the "1940 Act").

     As  currently  defined  in the  1940  Act,  "diversified  company"  means a
management company which meets the following  requirements:  at least 75% of the
value of its  total  assets is  represented  by cash and cash  items  (including
receivables),  government  securities,  securities of other investment companies
and other securities for the purposes of this calculation  limited in respect to
any one  issuer to an amount  not  greater  in value than 5% of the value of the
total assets of such management company and not more than 10% of the outstanding
voting securities of such issuer.

     2.  Purchase  the   securities  of  any  issuer  (other  than   "Government
securities" as defined under the 1940 Act) if, as a result, more than 25% of the
value of the  Portfolio's  total assets would be invested in the  securities  of
companies whose principal business activities are in the same industry.

     For purposes of applying this restriction, each Portfolio will not purchase
securities,  as  defined  above,  such  that  25% or  more of the  value  of the
Portfolio's  total assets are  invested in the  securities  of  companies  whose
principal business activities are in the same industry.

                                       14
<PAGE>


     3. Issue any senior securities,  except as permitted by the 1940 Act or the
Rules and Regulations of the Securities and Exchange Commission.

     4. Borrow  money,  except from banks for  temporary or  emergency  purposes
provided  that  such  borrowings  may  not  exceed  33-1/3%  of the  value  of a
Portfolio's net assets (including the amount borrowed). Any borrowings that come
to exceed this amount will be reduced within three days (not  including  Sundays
and  holidays) to the extent  necessary  to comply with the 33-1/3%  limitation.
This limitation shall not prohibit the Fund from engaging in reverse  repurchase
agreements,  making  deposits  of assets to margin  or  guarantee  positions  in
futures,   options,  swaps  or  forward  contracts,  or  segregating  assets  in
connection with such agreements or contracts.

     To the extent a Portfolio engages in reverse repurchase agreements, because
such transactions are considered  borrowing,  reverse repurchase  agreements are
included in the 33-1/3% limitation.

     5. Act as an  underwriter  of  securities of other  issuers,  except to the
extent that in  connection  with the  disposition  of portfolio  securities  the
Portfolio may be deemed to be an underwriter under applicable laws.

     6. Purchase or sell real estate unless acquired as a result of ownership of
securities  or  other  instruments.  This  restriction  shall  not  prevent  the
Portfolio  from  investing in  securities  or other  instruments  backed by real
estate or securities of companies engaged in the real estate business.

     7.  Purchase  or sell  commodities  other than  foreign  currencies  unless
acquired as a result of  ownership  of  securities.  This  limitation  shall not
prevent the Portfolio from  purchasing or selling  options,  futures,  swaps and
forward contracts or from investing in securities or other instruments backed by
commodities.

     For purposes of applying this restriction, "commodities" shall be deemed to
include commodity contracts.

     8. Make loans to other persons except to the extent not  inconsistent  with
the 1940  Act or the  Rules  and  Regulations  of the  Securities  and  Exchange
Commission.  This  limitation  does not apply to purchases of commercial  paper,
debt  securities  or  repurchase  agreements,  or to the  lending  of  portfolio
securities.

     9. Purchase securities on margin, except that the Portfolio may obtain such
short-term  credits as may be necessary  for the clearance of purchases or sales
of securities and provided that margin payments in connection with  transactions
in  options,  futures,  swaps  and  forward  contracts  shall  not be  deemed to
constitute purchasing securities on margin.

     10.  Sell  securities  short,  unless  it owns or has the  right to  obtain
securities  equivalent  in kind and amount to the  securities  sold  short,  and
provided that  transactions in options,  swaps and forward futures contracts are
not deemed to constitute selling securities short.

     For purposes of applying this  restriction,  each  Portfolio  will not sell
securities short except to the extent that it contemporaneously  owns or has the
right to obtain at no added cost securities identical to those sold short.

     11.   Except  as  part  of  a  merger,   consolidation,   acquisition,   or
reorganization,  invest  more than 5% of the  value of its  total  assets in the
securities  of any one  investment  company or more than 10% of the value of its
total assets,  in the  aggregate,  in the  securities of two or more  investment
companies, or acquire more than 3% of the total outstanding voting securities of
any one investment company.

     12.  Mortgage,  pledge or  hypothecate  its  assets  except  to the  extent
necessary to secure  permitted  borrowings.  This  limitation  does not apply to
reverse  repurchase  agreements or in the case of assets  deposited to margin or
guarantee positions in futures, options, swaps or forward contracts or placed in
a segregated account in connection with such contracts.

                                       15
<PAGE>

     13.  Participate  on a joint or a joint and several basis in any securities
trading account.

     14. Invest more than 15% of its net assets in illiquid investments.

     15. Invest directly in interests (including  partnership interests) in oil,
gas or other mineral  exploration  or development  leases or programs,  except a
Portfolio may purchase or sell  securities  issued by  corporations  engaging in
oil, gas or other mineral exploration or development business.

     Any of the investment  policies set forth under "Investment  Objectives and
Policies"  in  the  Prospectus,   or  any  restriction  set  forth  above  under
"Investment  Restrictions"  which involves a maximum percentage of securities or
assets (other than  Restriction 4) shall not be considered to be violated unless
an  excess  over the  percentage  occurs  immediately  after an  acquisition  of
securities  or  utilization  of assets and results  therefrom.  With  respect to
Restriction  14, a Portfolio is under a continuing  obligation to ensure that it
does not violate the maximum  percentage either by acquisition or by virtue of a
decrease in the value of the Fund's liquid assets.

PORTFOLIO TURNOVER

     The  portfolio  turnover  rate is  calculated  by  dividing  the  lesser of
purchases or sales of portfolio securities for the particular fiscal year by the
monthly  average of the value of portfolio  securities  owned by each  Portfolio
during  the same  fiscal  year.  "Portfolio  securities"  for  purposes  of this
calculation do not include  securities  with a maturity date of less than twelve
(12) months from the date of investment.  A 100%  portfolio  turnover rate would
occur,  for  example,  if the  lesser  of the  value  of  purchases  or sales of
portfolio  securities  for a particular  year were equal to the average  monthly
value of the  portfolio  securities  owned  during such year.  Each  Portfolio's
historical  portfolio  turnover  rates are set forth in the  Prospectus  section
"Financial Highlights".

                             INVESTMENT PERFORMANCE

     Advertisements and other sales literature may refer to monthly,  quarterly,
yearly,  cumulative  and average  annual  total  return.  Each such  calculation
assumes all dividends and capital gain distributions are reinvested at net asset
value on the appropriate reinvestment dates as described in the Prospectus,  and
includes all recurring  fees, such as investment  advisory and management  fees,
charged as expenses to all shareholder accounts. Each of monthly,  quarterly and
yearly total return is computed in the same manner as  cumulative  total return,
as set forth below.

     Cumulative  total  return is  computed by finding  the  cumulative  rate of
return over the period  indicated  in the  advertisement  that would  equate the
initial  amount  invested  to the  ending  redeemable  value,  according  to the
following formula:


                           CTR = (ERV-P) 100
                                  -----
                                    P

         Where:            CTR      =       Cumulative total return;

                           ERV      =       ending redeemable value at the 
                                            end of the period of a hypothetical
                                            $1,000 payment made at the 
                                            beginning of such period; and

                           P        =       initial payment of $1,000


     Average  annual  total  return is computed  by finding  the average  annual
compounded rates of return over the periods indicated in the advertisement  that
would  equate  the  initial  amount  invested  to the ending  redeemable  value,
according to the following formula:

                                       16
<PAGE>



                           P(1+T)n = ERV

         Where:            P        =       a hypothetical initial payment 
                                            of $1,000;

                           T        =       average annual total return;

                           n        =       number of years; and

                           ERV      =       ending redeemable value at the 
                                            end of the period of a hypothetical
                                            $1,000 payment made at the 
                                            beginning of such period.


     Reserve and Balanced  Portfolios may quote yield figures from time to time.
The "yield" is computed by dividing the net  investment  income per share earned
during a 30-day period (using the average  number of shares  entitled to receive
dividends)  by the net asset value per share on the last day of the period.  The
yield formula provides for monthly compounding which assumes that net investment
income is earned and  reinvested at a constant rate and annualized at the end of
a six-month period.

         The yield formula is as follows:

                           YIELD = 2[(a-b) + 1)6 -1]
                                      ---
                                       cd

                  Where:   a  =  dividends and interest earned during the 
                                 period.

                           b  =  expenses accrued for the period 
                                 (net of reimbursements).

                           c  =  the average daily number of shares outstanding
                                 during the period that were entitled to 
                                 receive dividends.

                           d  =  the net asset value of the Portfolio at 
                                 the end of the period.
   
     The table below shows the yearly  total return for each  Portfolio  for the
periods ended:
    
<TABLE>
<CAPTION>
<S>                                <C>                          <C>                           <C>               
                                   Regional Portfolio           Balanced Portfolio            Reserve Portfolio
     Period Ended 12/31               Total Return                 Total Return                 Total Return
     ------------------               ------------                 ------------                 ------------

                1994*                      6.20%                        2.20%                       2.25%
                1995                      33.51%                       16.21%                       5.09%
                1996                      11.88%                        9.80%                       4.93%
                1997                      13.45%                       16.60%                       4.62%
- -----------------------------
*    For the period  commencing  January 31, 1994 (Regional),  
     February 3, 1994 (Balanced) and April 7, 1994 (Reserve).
</TABLE>

   
     The average  annual total return of Regional  Portfolio  for the year ended
December 31, 1997 and from inception of the Regional  Portfolio through December
31, 1997 was 13.45% and 16.18%, respectively.

     The average  annual total return of Balanced  Portfolio  for the year ended
December 31, 1997 and from inception of the Balanced  Portfolio through December
31, 1997 was 16.60% and 11.31%, respectively. Balanced Portfolio's yield for the
thirty-day period ended December 31, 1997 was 2.25%.

     The average  annual  total return of Reserve  Portfolio  for the year ended
December 31, 1997 and from inception of the Reserve  Portfolio  through December
31, 1997 was 4.62% and 4.52%,  respectively.  Reserve  Portfolio's yield for the
thirty-day period ended December 31, 1997 was 4.55%.
    
                                       17
<PAGE>

     In  advertising  and sales  literature,  a Portfolio's  performance  may be
compared  with that of other mutual  funds,  indexes or averages of other mutual
funds,  indexes  of  related  financial  assets  or data,  and  other  competing
investment  and  deposit  products  available  from or through  other  financial
institutions.  The  composition of these indexes,  averages or products  differs
from that of a  Portfolio.  The  comparison  of a  Portfolio  to an  alternative
investment  should be made with  consideration  of  differences  in features and
expected performance.

     Yields and total  returns  quoted  for a  Portfolio  include  the effect of
deducting the  Portfolio's  expenses,  but may not include  charges and expenses
attributable to any particular  insurance product.  Since shares of the Fund may
only be purchased  through a variable  annuity or variable  life  contract,  you
should carefully review the prospectus of the insurance  product you have chosen
for information on relevant  charges and expenses.  Excluding these charges from
quotations  of a  Portfolio's  performance  has the  effect  of  increasing  the
performance  quoted.  You should bear in mind the effect of these  charges  when
comparing a Portfolio's performance to that of other mutual funds.

                                   MANAGEMENT

The names,  addresses,  positions and principal occupations of the directors and
executive officers of the Portfolios are given below.

<TABLE>
<CAPTION>
<S>                                      <C>    <C>                  <C>
Name and Address                         Age    Position             Principal Occupation(s) During Past 5 Years
- ----------------                         ---    --------             -------------------------------------------

Madeline Betsch                          55     Director             Currently   retired;   until  April  1994,  was
19 South 1st Street                                                  Executive  Vice  President,  Director of Client
Minneapolis, Minnesota 55401                                         Services,  of  CME-KHBB  Advertising  since May
                                                                     1985, and prior thereto was a Vice President with
                                                                     Campbell-Mithun, Inc. (advertising agency) since
                                                                     February 1977.

W. William Hodgson                       73     Director             Currently   retired;   served  as   information
1698 Dodd Road                                                       manager  for the North  Central  Home Office of
Mendota Heights, Minnesota 55118                                     the  Prudential  Insurance  Company  of America
                                                                     from 1961 until 1984.

George R. Long                           68     Director             Chairman   of   Mayfield    Corp.    (financial
29 Las Brisas Way                                                    consultants  and  venture   capitalists)  since
Naples, Florida 33963                                                1973.

J. Peter Thompson                        66     Director             Grain farmer in  southwestern  Minnesota  since
Route 1                                                              1974. Prior  to  that,  Mr. Thompson was
Mountain Lake, Minnesota 56159                                       employed  by Paine  Webber,  Jackson  & Curtis, 
                                                                     Incorporated, (a diversified financial services
                                                                     concern), most recently as Senior Vice President
                                                                     and General Partner.

Charles H. Withers                       71     Director             Currently retired;  was Editor of the Rochester
Rochester Post Bulletin                                              Post-Bulletin,  Rochester,  Minnesota from 1960
P.O. Box 6118                                                        through March 31, 1980.
Rochester, Minnesota 55903

Noel P. Rahn                             59     President            Chief  Executive  Officer and a Director of IAI
3700 First Bank Place                                                since 1974.  Mr. Rahn is also  President of the
P.O. Box 357                                                         other IAI Mutual  Funds and of  LifeUSA  Funds,
Minneapolis, Minnesota 55440                                         Inc.


                                       18
<PAGE>



Name and Address                         Age    Position             Principal Occupation(s) During Past 5 Years
- ----------------                         ---    --------             -------------------------------------------
   
    

William C. Joas                          35     Secretary            Vice  President  of IAI  and has  served  as an
3700 First Bank Place                                                attorney  for IAI since 1990.  Mr. Joas is also
P.O. Box 357                                                         Secretary  of the other IAI Mutual Funds and of
Minneapolis, Minnesota 55440                                         LifeUSA Funds, Inc.

   
    

   
Susan J. Haedt                           36     Treasurer            Vice  President  of the Adviser and Director of
3700 First Bank Place                                                Fund Operations.  Prior to joining the
P.O. Box 357                                                         Adviser in 1992,  Ms.  Haedt served as a Senior
Minneapolis, Minnesota 55440                                         Manager   at  KPMG  Peat   Marwick   LLP,   (an
                                                                     international  tax,  accounting  and consulting
                                                                     firm).  Ms. Haedt is also Treasurer of the IAI
                                                                     IAI Mutual Funds and of LifeUSA Funds, Inc.
    
</TABLE>

     Each Fund has  agreed to  reduced  initial  subscription  requirements  for
employees  and  directors  of  a  Fund  or  IAI,  their  spouses,  children  and
grandchildren.  With respect to such persons,  the minimum initial investment in
one or more of the IAI Family of Funds is $500; provided that the minimum amount
that can be allocated to any one of the Funds is $250. Subsequent  subscriptions
are limited to a minimum of $100 for each of the Funds.

     No compensation  is paid by the Fund to any of its officers.  Directors who
are not  affiliated  with IAI receive from the IAI Mutual Funds a $15,000 annual
retainer,  $2,500  for each  Board  meeting  attended,  $3,600  for  each  Audit
Committee  meeting  attended  (as  applicable)  and $1,800  for each  Securities
Valuation Committee meeting attended. Each Portfolio will pay its pro rata share
of these fees based on its net  assets.  Such  unaffiliated  directors  also are
reimbursed  for  expenses  incurred  in  connection  with  attending   meetings.
Effective  February  1998,  the  directors  have agreed that the position of the
Board Chair shall rotate from director to director on a quarterly basis.
                                  
<TABLE>
<CAPTION>
<S>                                    <C>            <C>             <C>                <C>
                                                    Compensation from                                      
                                       --------------------------------------------      Aggregate Compensation
                                         Regional       Balanced         Reserve                from the
Name of Person, Position                 Portfolio      Portfolio       Portfolio         19 IAI Mutual Funds*
- ------------------------                 ---------      ---------       ---------         -------------------

Betsch, Madeline  -  Director          $    310.96    $      40.82   $      12.52                $37,200
Hodgson, W. William  - Director        $    310.96    $      40.82   $      12.52                $37,200
Long, George R.  -  Director           $    316.86    $      41.72   $      12.79                $37,200
Thompson, J. Peter  -  Director        $    310.96    $      40.82   $      12.52                $37,200
Withers, Charles H.  -  Director       $    316.86    $      41.72   $      12.79                $37,200
         Total                         $  1,566.60     $    205.90    $     63.14
- --------------------------------------
*    For the  calendar  year ended  December 31, 1997; 
     excludes expenses incurred in connection with attending meetings.
</TABLE>

     The Board of Directors for each of the Funds has approved a Code of Ethics.
The Code permits  access persons to engage in personal  securities  transactions
subject to  certain  policies  and  procedures.  Such  procedures  prohibit  the
acquiring of any  securities in an initial  public  offering.  In addition,  all
securities  acquired through private  placement must be pre-cleared.  Procedures
have been adopted which would implement blackout periods for certain securities,
as well as a ban on short-term trading profits. Additional policies prohibit the
receipt of gifts in  certain  instances.  Procedures  have been  implemented  to
monitor  employee  trading.  Each  access  person of the  Adviser is required to
certify  annually  that they have read and  understood  the Code of  Ethics.  An
annual report is provided to the Funds' Board of Directors  summarizing existing
procedures and changes,  identifying  material  violations and  recommending any
changes needed.

                                       19
<PAGE>

     IAI's ultimate  corporate parent is Lloyds TSB Group, plc ("Lloyds TSB"), a
publicly-held financial services organization  headquartered in London, England.
Lloyds TSB is one of the  largest  personal  and  corporate  financial  services
groups in the United  Kingdom,  engaged in a wide range of activities  including
commercial and retail banking.  The principal  offices of Lloyds TSB are located
at St. George's House, 6/8 Eastcheap, London, EC3M 1LL.

INVESTMENT ADVISORY AGREEMENT

     Pursuant to an Investment  Advisory Agreement between the Fund and IAI (the
"Advisory  Agreement")  dated November 3, 1993, as last approved by the Board on
November  4, 1997,  IAI has agreed to provide  each  Portfolio  with  investment
advice, statistical and research facilities, and certain equipment and services,
including,  but not limited to,  office space and necessary  office  facilities,
equipment,  and the services of required  personnel.  In return,  each Portfolio
pays IAI a monthly fee. Under the Advisory Agreement, IAI has the sole authority
and responsibility to make and execute  investment  decisions for the Portfolios
within the framework of each Portfolio's investment policies,  subject to review
by the directors of the Fund.

     Regional  Portfolio  has agreed to pay an  advisory  fee equal to an annual
rate of .65% of its average daily net assets.  Balanced  Portfolio has agreed to
pay an advisory  fee equal to an annual  rate of .65% of its  average  daily net
assets.  Reserve  Portfolio has agreed to pay an advisory fee equal to an annual
rate of .45% of its average daily net assets. As of December 31, 1997, Regional,
Balanced and Reserve Portfolios had net assets of $17,084,816,  $2,445,655,  and
$1,021,315,  respectively.  Pursuant to the Advisory  Agreement,  the Portfolios
have paid IAI advisory fees, net of waivers, as follows:

<TABLE>
<CAPTION>
<S>                                <C>                         <C>                      <C>                                         
                                   Regional Portfolio          Balanced Portfolio       Reserve Portfolio
                                   ------------------          ------------------       -----------------

Fiscal Year Ended 
December 31, 1995                         $ 9,176                           0                       0

Fiscal Year Ended
December 31, 1996                         $ 51,843                          0                       0

Fiscal Year Ended
December 31, 997                          $ 95,467                  $  10,836                       0
</TABLE>

     Although  investment  decisions for each  Portfolio are made  independently
from those of the other  Portfolios,  funds and  accounts  as to which IAI gives
investment  advice,  it may  occasionally  develop  that  the same  security  is
suitable for more than one  Portfolio,  fund and/or other  account.  If and when
more than one Portfolio,  fund or other account simultaneously  purchase or sell
the same security,  the transactions  will be averaged as to price and allocated
as to amount in accordance with arrangements equitable to such Portfolios, funds
and accounts.  The simultaneous  purchase or sale of the same securities by more
than one Portfolio or by any Portfolio and other  accounts may have  detrimental
effects on each  Portfolio,  as they may affect the price paid or  received by a
Portfolio or the size of the position obtainable by a Portfolio.

ADMINISTRATIVE AGREEMENT

     The  Fund has  engaged  IAI to  serve  as the  Portfolios'  administrative,
dividend disbursing, redemption, accounting services and transfer agent pursuant
to an Administrative  Agreement.  Under the  Administrative  Agreement,  IAI has
agreed to  provide  to the Fund all  required  administrative,  stock  transfer,
redemption,  dividend  disbursing and  accounting  services  including,  without
limitation,  the following:  (1) the  maintenance of the  Portfolios'  accounts,
books  and  records;  (2) the  calculations  of the  daily  net  asset  value in
accordance  with the Fund's  current  Prospectus  and  Statement  of  Additional
Information;  (3) daily and periodic reports;  (4) all information  necessary to
complete tax returns,  questionnaires  and other reports  requested by the Fund;
(5) the maintenance of stock registry  records;  (6) the processing of requested
account  registration  changes,   stock  certificate  issuances  and  redemption
requests;  and (7) the administration of payments of dividends and distributions
declared by each Portfolio.  As compensation for these services,  each Portfolio
has agreed to pay IAI a fee equal to an annual rate of .10% of such  Portfolio's
average  daily net assets.  Pursuant to the  Administrative  Agreement,  for the

                                       20
<PAGE>

fiscal year ended December 31, 1997,  Regional,  Balanced and Reserve Portfolios
paid IAI  administrative  fees (net of fee waivers) of $14,687,  $1,937, and $0,
respectively.

ALLOCATION OF EXPENSES

     In addition  to the  advisory  and  administrative  fees paid to IAI,  each
Portfolio pays all its other costs and expenses,  including,  for example, costs
incurred in the purchase  and sale of assets,  interest,  taxes,  charges of the
custodian of the Portfolio's assets, costs of reports and proxy material sent to
Portfolio shareholders, fees paid for independent accounting and legal services,
costs of printing  Prospectuses  for Portfolio  shareholders and registering the
Portfolios' shares,  postage, fees to directors who are not "interested persons"
of each Portfolio, insurance premiums, costs of attending investment conferences
and such other  costs  which may be  designated  as  extraordinary.  IAI, in its
discretion,  may  from  time to time  waive  or  reduce  its  management  and/or
administrative  fee or otherwise  reimburse  Fund  operating  expenses.  IAI has
voluntarily  agreed  to  waive  fees  and  expenses  for  Balanced  and  Reserve
Portfolios  in excess of 1.25% and 0.85%,  respectively,  of  average  daily net
assets  through  May 1,  1999.  IAI is not  liable  for any loss  suffered  by a
Portfolio in the absence of willful  misfeasance,  bad faith or gross negligence
in the  performance  of its duties and  obligations.  For the fiscal  year ended
December 31, 1997, IAI voluntarily reimbursed total Portfolio operating expenses
(net of expenses paid  indirectly)  which exceeded 1.25% and .85% of the average
daily net assets of Balanced and Reserve Portfolios, respectively.
                                       
DURATION OF AGREEMENTS

     The Advisory  Agreement and the  Administrative  Agreement  will  terminate
automatically in the event of their assignment.  In addition,  each Agreement is
terminable at any time with respect to a Portfolio  without penalty by the Board
of Directors of the Fund or by vote of a majority of the Portfolio's outstanding
voting securities on not more than 60 days' written notice to IAI, and by IAI on
60 days' notice to the Fund.  Each Agreement  shall continue in effect from year
to year  only so long as such  continuance  is  specifically  approved  at least
annually by either the Board of  Directors  of the Fund or by vote of a majority
of the outstanding voting securities of the affected Portfolio, provided that in
either  event such  continuance  is also  approved  by the vote of a majority of
directors  who are not parties to the  Agreement or  interested  persons of such
parties  cast in person at a meeting  called  for the  purpose of voting on such
approval.

                                CUSTODIAL SERVICE

     The custodian for the Fund is Norwest Bank Minnesota,  N.A. Norwest Center,
Sixth  and  Marquette,  Minneapolis,  MN  55479.  Norwest  has  entered  into an
agreement with Morgan Stanley Trust Company, 1 Pierrepont Plaza,  Brooklyn,  New
York ("Morgan  Stanley") which enables the Fund to utilize the  subcustodian and
depository network of Morgan Stanley.

     The Custodian maintains records of all cash transactions of the Portfolios.
All other books and records of the  Portfolios,  including  books and records of
the Portfolio's investment portfolios, are maintained by IAI.

               PORTFOLIO TRANSACTIONS AND ALLOCATION OF BROKERAGE

     Fixed income and  non-listed  equity  transactions  of the  Portfolios  are
generally effected with dealers without the payment of brokerage commissions but
at a net price which  usually  includes a spread or markup.  In  effecting  such
portfolio transactions on behalf of the Portfolios, IAI seeks the most favorable
net price consistent with the best execution.  However, frequently IAI selects a
dealer to effect a particular  transaction  without  contacting  all dealers who
might be able to effect such transaction because of the volatility of the market
and the desire of IAI to accept a  particular  price for a security  because the
price offered by the dealer meets its guidelines for profit, yield or both.

                                       21
<PAGE>

     So long as IAI believes that it is obtaining the best net price  (including
the spread or markup) consistent with the best execution, as described above, it
gives  consideration  in placing  portfolio  transactions to dealers  furnishing
research,  statistical information, or other services to IAI. This allows IAI to
supplement its own investment  research activities and enables IAI to obtain the
views and  information  of  individuals  and research  staffs of many  different
securities firms prior to making investment decisions for the Portfolios. To the
extent  portfolio  transactions  are effected with dealers who furnish  research
services to it, IAI  receives a benefit  which is not capable of  evaluation  in
dollar amounts.

     Generally,  Regional  Portfolio  and  Balanced  Portfolio  must  deal  with
brokers.  IAI selects and (where  applicable)  negotiates  commissions  with the
brokers who execute the  transactions  for each Portfolio.  The primary criteria
for the  selection  of a broker is the ability of the broker,  in the opinion of
IAI,  to  secure  prompt  execution  of the  transactions  on  favorable  terms,
including the  reasonableness of the commission and considering the state of the
market at the time. In selecting a broker,  IAI may consider whether such broker
provides brokerage and research services (as defined in the Securities  Exchange
Act of 1934).  IAI may direct  Portfolio  transactions  to brokers  who  furnish
research services to IAI. Such research  services include advice,  both directly
and in writing, as to the value of securities, the advisability of investing in,
purchasing  or  selling  securities,  and  the  availability  of  securities  or
purchasers or sellers of securities,  as well as analyses and reports concerning
issues, industries, securities, economic factors and trends, portfolio strategy,
and the performance of accounts.  By allocating  brokerage  business in order to
obtain research  services for IAI, each Portfolio  enables IAI to supplement its
own  investment  research  activities  and  allows  IAI to obtain  the views and
information of  individuals  and research  staffs of many  different  securities
research firms prior to making investment  decisions for each Portfolio.  To the
extent such commissions are directed to brokers who furnish research services to
IAI,  IAI  receives a benefit,  not  capable of  evaluation  in dollar  amounts,
without  providing  any direct  monetary  benefit to each  Portfolio  from these
commissions.  Generally,  the Portfolios  pay higher than the lowest  commission
rates available.

     Consistent  with the  Rules  of  Conduct  of the  National  Association  of
Securities Dealers,  Inc. and subject to the policies set forth in the preceding
paragraphs  and such other  policies as the Board of Directors of each Portfolio
may determine,  IAI may consider sales of shares of each  Portfolio,  or any IAI
Mutual  Fund,  as a factor in the  selection  of  broker-dealers  to execute the
Fund's securities transactions.

     IAI believes that most research  services  obtained by it generally benefit
one or more of the  investment  companies  or other  accounts  which it manages.
Research  services  obtained from  transactions in fixed income securities would
primarily  benefit the managed funds investing such fixed income  securities and
managed accounts investing in fixed income securities.

     Brokerage  commissions,  listed  below,  were paid by Regional and Balanced
Portfolios  for the fiscal years (or periods)  ended  December 31.  During these
periods,  a percentage of commissions were paid to brokerage firms that provided
research  services to IAI,  although  the  provision  of such  services  was not
necessarily a factor in the placement of all such business with such firms.

<TABLE>
<CAPTION>
<S>                           <C>                <C>                  <C>               <C>
                                                                                        Percentage of Commissions
                                                                                           to Brokers Providing
                                        Amount of Commissions                                    Research
                         ----------------------------------------------------------    ---------------------------
Portfolio                      1997                1996                 1995                        1997
- ---------                      ----                ----                 ----                        ----

Regional                     $64,860              $36,268              $16,758                     22.9%
Balanced                     $ 1,471              $ 2,188              $   902                     65.6%
</TABLE>

                                       22
<PAGE>
                                  CAPITAL STOCK

     Each  Portfolio is a separate  portfolio of IAI Retirement  Funds,  Inc., a
corporation  organized on September 28, 1993,  pursuant to the laws of the State
of Minnesota  whose shares of common stock are currently  issued in three series
(Series A, B and C). Each share of a series is entitled to participate  pro rata
in any  dividends  and other  distributions  of such  series and all shares of a
series have equal rights in the event of liquidation  of that series.  The Board
of Directors of IAI Retirement  Funds,  Inc., is empowered under the Articles of
Incorporation  of such  company to issue other  series of the  company's  common
stock without shareholder  approval.  IAI Retirement Funds, Inc., has authorized
10,000,000,000  shares of $.01 par value  common  stock to be issued as Series A
common shares, 10,000,000,000 shares of $.01 par value common stock to be issued
as Series B common shares,  and  10,000,000,000  shares of $.01 par value common
stock  to be  issued  as  Series  C  common  shares.  The  investment  portfolio
represented by Series A common shares is referred to as IAI Regional  Portfolio,
by Series B common  shares  as IAI  Balanced  Portfolio,  and by Series C common
shares as IAI Reserve Portfolio. As of December 31, 1997, IAI Regional Portfolio
had 1,047,317  shares  outstanding,  IAI Balanced  Portfolio had 171,087  shares
outstanding, and IAI Reserve Portfolio had 102,174 shares outstanding.

   
     As of March 31, 1998, no person held of record,  or to the knowledge of the
Fund, beneficially owned more than 5% of a Portfolio, except as set forth in the
following tables:

<TABLE>
<CAPTION>
<S>                                       <C>                                     <C>
REGIONAL PORTFOLIO
- -----------------------------------------------------------------------------------------------
Name and Address                                                                   Percent of
 of Shareholder                            Number of Shares                           Class
- ------------------------------------------------------------------------------------------------

Lincoln Benefit Life Company                 910,489.075                              84.69%
Annuity Products
P.O. Box 82532
Lincoln, Nebraska 68501

Lincoln Benefit Life Company                 164,531.999                              15.30%
Life Products
P.O. Box 82532
Lincoln, Nebraska 68501

                                        
BALANCED PORTFOLIO
- -----------------------------------------------------------------------------------------------
Name and Address                                                                   Percent of
  of Shareholder                            Number of Shares                         Class
- ------------------------------------------------------------------------------------------------

Lincoln Benefit Life Company                 158,669.041                             85.07%
Annuity Products
P.O. Box 82532
Lincoln, Nebraska 68501

Lincoln Benefit Life Company                  27,843.765                             14.93%
Life Products
P.O. Box 82532
Lincoln, Nebraska 68501
</TABLE>

                                       23
<PAGE>

<TABLE>
<CAPTION>
<S>                                        <C>                                                            
RESERVE PORTFOLIO
- ---------------------------------------------------------------------------------------------
Name and Address                                                                 Percent of
  of Shareholder                            Number of Shares                       Class
- ----------------------------------------------------------------------------------------------

Lincoln Benefit Life Company                   65,180.949                          76.47%
Annuity Products
P.O. Box 82532
Lincoln, Nebraska 68501

Lincoln Benefit Life Company                   20,057.277                          23.53%
Life Products
P.O. Box 82532
Lincoln, Nebraska 68501
</TABLE>

     In addition,  as of March 31, 1998, none of Regional,  Balanced and Reserve
Portfolios'  officers and directors owned any of the  outstanding  shares of the
Portfolios.
    

     Due to its ownership of more than 25% of the outstanding  shares of each of
the  Portfolios  through its Life and Annuity  Products,  Lincoln  Benefit  Life
Company may be said to control  each of such  Portfolios.  Lincoln  Benefit Life
Company is an insurance  company  organized under the laws of Nebraska.  Lincoln
Benefit Life Company is a  wholly-owned  subsidiary of Allstate  Life  Insurance
Company,  which in turn is wholly-owned by Allstate Insurance Company.  Allstate
Insurance Company is a wholly-owned subsidiary of The Allstate Corporation.

                    NET ASSET VALUE AND PUBLIC OFFERING PRICE

     The portfolio  securities in which the Fund invests fluctuate in value, and
hence, for each Portfolio, the net asset value per share also fluctuates.

     The net asset value per share of each Portfolio is determined once daily as
of the close of trading on the New York Stock  Exchange on each  business day on
which the New York Stock Exchange is open for trading,  and may be determined on
additional  days  as  required  by the  Rules  of the  Securities  and  Exchange
Commission.  The New York Stock Exchange is closed, and the net asset values per
share of each are not determined, on the following national holidays: New Year's
Day, Martin Luther King, Jr. Day,  Presidents'  Day, Good Friday,  Memorial Day,
Independence Day, Labor Day, Thanksgiving Day, and Christmas Day.

     On December 31,  1997,  the net asset value and public  offering  price per
share of each Portfolio was calculated as follows:

REGIONAL PORTFOLIO

NAV =      Net Assets ($17,084,816)            =     $16.31
          -----------------------------
          Shares Outstanding (1,047,317)


BALANCED PORTFOLIO

NAV =      Net Assets ($2,445,655)             =     $14.29
          ---------------------------
          Shares Outstanding (171,087)


RESERVE PORTFOLIO

NAV =      Net Assets ($1,021,315)             =     $10.00
          ----------------------------
          Shares Outstanding (102,174)


                                       24
<PAGE>

                                   TAX STATUS

     The Board of Directors intends that each of the Portfolios will comply with
the  diversification  requirements  imposed  by section  817(h) of the  Internal
Revenue Code as a condition to favorable tax  treatment of variable  annuity and
variable life insurance  contracts.  Under Internal Revenue Service Regulations,
such requirements are satisfied if, at the end of each calendar quarter: (1) not
more than 55% of the Portfolio's  assets are attributable to any one investment;
not more than 70% of such assets are  attributable to any two  investments;  not
more than 80% of such assets are attributable to any three investments;  and not
more than 90% of such  assets are  attributable  to any four  investments.  If a
Portfolio  fails to be  adequately  diversified  within  the  meaning of section
817(h) of the  Internal  Revenue  Code,  the  variable  contracts  funded by the
Portfolio could lose their favorable tax status. See the accompanying prospectus
for your separate account for more information.

                        LIMITATION OF DIRECTOR LIABILITY

     Under  Minnesota law, the Fund's Board of Directors owes certain  fiduciary
duties  to the Fund  and to its  shareholders.  Minnesota  law  provides  that a
director "shall  discharge the duties of the position of director in good faith,
in a manner the director  reasonably  believes to be in the best interest of the
corporation,  and with the care an ordinarily  prudent person in a like position
would exercise under similar circumstances." Fiduciary duties of a director of a
Minnesota  corporation include,  therefore,  both a duty of "loyalty" (to act in
good faith and act in a manner  reasonably  believed to be in the best interests
of the  corporation)  and a duty of "care"  (to act with the care an  ordinarily
prudent person in a like position  would exercise under similar  circumstances).
Minnesota  law  authorizes  corporations  to  eliminate  or limit  the  personal
liability  of a director to the  corporation  or its  shareholders  for monetary
damages  for breach of the  fiduciary  duty of "care."  Minnesota  law does not,
however,  permit a corporation to eliminate or limit the liability of a director
(i) for any breach of the director's duty of "loyalty" to the corporation or its
shareholders,  (ii)  for acts or  omissions  not in good  faith or that  involve
intentional  misconduct or a knowing  violation of law, (iii) for  authorizing a
dividend,  stock repurchase or redemption or other  distribution in violation of
Minnesota  law or for violation of certain  provisions  of Minnesota  securities
laws, or (iv) for any  transaction  from which the director  derived an improper
personal benefit.  The Articles of Incorporation of IAI Retirement Funds,  Inc.,
limit the  liability of directors to the fullest  extent  permitted by Minnesota
statutes, except to the extent that such liability cannot be limited as provided
in the Investment  Company Act of 1940 (which Act prohibits any provisions which
purport to limit the liability of directors arising from such directors' willful
misfeasance,  bad faith,  gross negligence,  or reckless disregard of the duties
involved in the conduct of their role as directors).

     Minnesota  law  does  not  eliminate  the  duty of  "care"  imposed  upon a
director.  It only authorizes a corporation to eliminate  monetary liability for
violations of that duty. Minnesota law, further,  does not permit elimination or
limitation  of liability of "officers"  of the  corporation  for breach of their
duties as officers  (including  the liability of directors who serve as officers
for  breach  of their  duties  as  officers.)  Minnesota  law  does  not  permit
elimination  or  limitation of the  availability  of equitable  relief,  such as
injunctive  or  rescissionary  relief.  Further,  Minnesota  law does not permit
elimination or limitation of a director's  liability under the Securities Act of
1933 or the Securities  Exchange Act of 1934, and it is uncertain whether and to
what extent the elimination of monetary  liability would extend to violations of
duties imposed on directors by the Investment  Company Act of 1940 and the rules
and regulations adopted under such Act.


                              FINANCIAL STATEMENTS

     The  financial  statements,  included  as a part of the Fund's  1997 Annual
Report to shareholders, are incorporated herein by reference. Such Annual Report
may be  obtained  by  shareholders  on  request  from the Fund at no  additional
charge.

                                       25
<PAGE>
                                   APPENDIX A

                           RATINGS OF DEBT SECURITIES

RATINGS BY MOODY'S

CORPORATE BONDS

     Aaa.  Bonds rated Aaa are judged to be of the best quality.  They carry the
smallest degree of investment risk and are generally referred to as "gilt edge."
Interest payments are protected by a large or by an exceptionally  stable margin
and  principal is secure.  While the various  protective  elements are likely to
change,  such  changes  as can be  visualized  are most  unlikely  to impair the
fundamentally strong position of such issues.

     Aa.  Bonds  rated Aa are  judged to be of high  quality  by all  standards.
Together with the Aaa group,  they  comprise  what are  generally  known as high
grade  bonds.  They are rated  lower  than the best  bonds  because  margins  of
protection may not be as large as in Aaa securities or fluctuation of protective
elements  may be of greater  amplitude  or there may be other  elements  present
which make the long term risks appear somewhat larger than in Aaa securities.

     A. Bonds rated A possess many favorable investment attributes and are to be
considered  as upper  medium  grade  obligations.  Factors  giving  security  to
principal  and interest  are  considered  adequate,  but elements may be present
which suggest a susceptibility to impairment sometime in the future.

     Baa. Bonds rated Baa are considered  medium grade  obligations;  i.e., they
are neither highly protected nor poorly secured. Interest payments and principal
security appear adequate for the present but certain protective  elements may be
lacking or may be  characteristically  unreliable over any great length of time.
Such  bonds  lack  outstanding  investment  characteristics  and  in  fact  have
speculative characteristics as well.

     Ba. Bonds which are rated Ba are judged to have speculative elements; their
future cannot be considered  as well assured.  Often the  protection of interest
and principal  payments may be very moderate,  and thereby not well  safeguarded
during  other  good and bad  times  over the  future.  Uncertainty  of  position
characterizes bonds in this class.

     B.  Bonds  rated  B  generally  lack   characteristics   of  the  desirable
investment. Assurances of interest and principal payment or maintenance of other
terms of the contract over any long period of time may be small.

     Caa. Bonds rated Caa are of poor standing. Such issues may be in default or
there may be present elements of danger with respect to principal or interest.

     Ca. Bonds rated Ca represent  obligations  which are  speculative in a high
degree. Such issues are often in default or have other marked shortcomings.

     C. Bonds  rated C are the  lowest-rated  class of bonds and issued so rated
can be regarded as having  extremely  poor  prospects of ever attaining any real
investment standing.

     Conditional  Ratings. The designation "Con." followed by a rating indicates
bonds for which the  security  depends  upon the  completion  of some act or the
fulfillment  of some  condition.  These are bonds  secured  by (a)  earnings  of
projects under  construction,  (b) earnings or projects  unseasoned in operating
experience,  (c)  rentals  which begin when  facilities  are  completed,  or (d)
payments to which some other limiting condition attaches.  Parenthetical  rating
denotes  probable  credit stature upon completion of construction or elimination
of basis of condition.

                                      A-1
<PAGE>


Note:  Moody's  applies  numerical  modifiers  1,  2,  and  3 in  the  Aa  and A
classifications  of its corporate bond rating  system.  The modifier 1 indicates
that the security  ranks in the higher end of its generic rating  category;  the
modifier 2 indicates a mid-range ranking;  and the modifier 3 indicates that the
issue ranks in the lower end of its generic  rating  category.  With  respect to
municipal  securities,  those  bonds in the Aa, A, Baa,  Ba, and B groups  which
Moody's believes possess the strongest  investment  attributes are designated by
the symbols Aa1, A1, Baa1, Ba1, and B1.

COMMERCIAL PAPER

     Moody's  employs  the  following  three  designations,  all  judged  to  be
investment grade, to indicate the relative repayment capacity of rated issuers:

     Prime  - 1  Superior  ability  for  repayment  of  senior  short-term  debt
obligations

     Prime  -  2  Strong  ability  for  repayment  of  senior   short-term  debt
obligations

     Prime - 3  Acceptable  ability  for  repayment  of senior  short-term  debt
obligations

     If an issuer  represents to Moody's that its Commercial  Paper  obligations
are supported by the credit of another entity or entities, Moody's, in assigning
ratings to such  issuers,  evaluates  the  financial  strength of the  indicated
affiliated   corporations,   commercial  banks,  insurance  companies,   foreign
governments,  or other  entities,  but only as one  factor in the  total  rating
assessment.


RATINGS BY S&P

CORPORATE BONDS

     AAA. Debt rated AAA has the highest rating assigned by S&P. Capacity to pay
interest and repay principal is extremely strong.

     AA. Debt rated AA has a very  strong  capacity  to pay  interest  and repay
principal and differs from the higher rated issues only in small degree.

     A. Debt rated A has a strong  capacity to pay interest and repay  principal
although it is somewhat more  susceptible  to the adverse  effects of changes in
circumstances and economic conditions than debt in higher-rated categories.

     BBB.  Debt rated BBB is  regarded  as having an  adequate  capacity  to pay
interest and repay principal.  Whereas it normally exhibits adequate  protection
parameters,  adverse  economic  conditions  or changing  circumstances  are more
likely to lead to a weakened  capacity to pay interest and repay  principal  for
debt in this category than in higher-rated categories.

     BB. Debt rated BB has less  near-term  vulnerability  to default than other
speculative issues. However, it faces major ongoing uncertainties or exposure to
adverse  business,  financial,  or  economic  conditions  which  could  lead  to
inadequate capacity to meet timely interest and principal payments.

     B. Debt rated B has a greater  vulnerability  to default but  currently has
the  capacity  to meet  interest  payments  and  principal  repayments.  Adverse
business,  financial,  or economic  conditions  will likely  impair  capacity or
willingness to pay interest and repay  principal.  The B rating category is also
used for debt  subordinated to senior debt that is assigned an actual or implied
BB-rating.

                                      A-2
<PAGE>

     CCC. Debt rated CCC has a currently identifiable  vulnerability to default,
and is dependent upon favorable business,  financial, and economic conditions to
meet timely  payment of interest  and  repayment of  principal.  In the event of
adverse business, financial or economic conditions, it is not likely to have the
capacity to pay interest and repay principal.

     CC. Debt rated CC is typically  applied to debt subordinated to senior debt
which is assigned an actual or implied CCC debt rating.

     C. The rating C typically applied to debt subordinated to senior debt which
assigned an actual or implied CCC-debt rating. The C rating may be used to cover
a situation where a bankruptcy petition has been filed but debt service payments
are continued.

     C1. The rating C1 is  reserved  for income  bonds on which no  interest  is
being paid.

     D. Debt rated D is in payment  default.  The D rating category is used when
interest payments or principal payments are not made on the date due even if the
applicable  grace  period  has not  expired,  unless S & P  believes  that  such
payments will be made during such grace  period.  The D rating will be used upon
the filing of a bankruptcy petition if debt service payments are jeopardized.

     In order to provide more detailed indications of credit quality, S&P's bond
letter ratings  described above (except for the AAA category) may be modified by
the  addition  of a plus or a minus sign to show  relative  standing  within the
rating category.

COMMERCIAL PAPER

     A. This highest rating category  indicates the greatest capacity for timely
payment. Issues in this category are further defined with the designations 1, 2,
and 3 to indicate the relative degree to safety.

     A-1. This designation  indicates that the degree of safety regarding timely
payment is either  overwhelming  or very  strong.  Those  issues  determined  to
possess overwhelming safety characteristics are designed A-1+.

     A-2.  Capacity  for timely  payments  on issues  with this  designation  is
satisfactory.  However,  the  relative  degree  of  safety is not as high as for
issues designed A-1.

     A-3. Issues  carrying this  designation  have adequate  capacity for timely
repayment.  They are, however, more vulnerable to the adverse effects of changes
in circumstances than obligations carrying the higher designations.

                                      A-3
                             


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