PRINCIPAL WORLD FUND INC /IA/
497, 1997-09-18
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                      SUPPLEMENT DATED SEPTEMBER 19, 1997
                     TO THE PRINCIPAL MUTUAL FUND PROSPECTUS
                                DATED MAY 1, 1997



At the Special Meeting of Shareholders held September 16, 1997, the shareholders
of each Fund approved the following actions:

Effective January 1, 1998, the following changes will be made:

1. Each Fund will adopt an Agreement and Plan of Reorganization  and Liquidation
   under  which the  existing  Funds will  become an  account  of the  Principal
   Variable Contracts Fund, Inc.

            Current Fund                       Account
            ------------                       -------
   Principal Balanced Fund, Inc.               Balanced Account
   Principal Bond Fund, Inc.                   Bond Account
   Principal Capital Accumulation Fund, Inc.   Capital Value Account
   Principal Emerging Growth Fund, Inc.        MidCap Account
   Principal Government Securities Fund, Inc.  Government Securities Account
   Principal Growth Fund, Inc.                 Growth Account
   Principal Money Market Fund, Inc.           Money Market Account
   Principal World Fund, Inc.                  International Account

2. Principal Capital Accumulation Fund, Principal Government Securities Fund and
   Principal  Money Market Fund each will eliminate the  fundamental  investment
   restrictions  prohibiting the Fund from purchasing shares of other investment
   companies and prohibiting the Fund from joint participation in any securities
   trading account.

3. Principal Capital Accumulation Fund will eliminate the fundamental investment
   restrictions  prohibiting the Fund from purchasing  restricted securities and
   from   investing   in   repurchase   agreements.   The  Fund  will   adopt  a
   non-fundamental  investment  restriction  providing  that  the  Fund  may not
   "Invest  more  than  15%  of its  total  assets  in  securities  not  readily
   marketable and in repurchase agreements maturing in more than seven days."

4. Principal Government  Securities Fund will modify the fundamental  investment
   restriction  prohibiting  the Fund from  purchasing  other  than  obligations
   issued or  guaranteed  by the United  States  Government  or its  agencies or
   instrumentalities.  The Fund will be permitted to maintain reasonable amounts
   in cash or  purchase  short-term  debt  securities  that  are not  issued  or
   guaranteed   by  the   United   States   Government   or  its   agencies   or
   instrumentalities.

5. Principal   Money   Market  Fund  will  amend  the   fundamental   investment
   restrictions  to allow the Fund to: i) invest more than 5% (but not more than
   25%) of total Fund assets in the securities of a single issuer;  ii) purchase
   the  securities  of an issuer if the purchase does not cause more than 10% of
   the outstanding voting securities of the issuer to be held by the Fund (other
   than securities  issued or guaranteed by the United States  Government or its
   agencies or instrumentalities);  and iii) invest that percentage of its total
   assets  in  securities  nor  readily  marketable  as is  allowed  by  federal
   securities rules or interpretations.
<PAGE>
                       SUPPLEMENT DATED SEPTEMBER 19, 1997
                     TO THE PRINCIPAL MUTUAL FUND PROSPECTUS
                                DATED MAY 1, 1997


At the Special Meeting of Shareholders held September 16, 1997, the shareholders
of each Fund approved the following actions:

Effective January 1, 1998, the following changes will be made:

1.  Each  Fund  will  adopt an  Agreement  and Plan of  Reorganization  and
    Liquidation  under which the  existing  Funds will become an account of
    the Principal Variable Contracts Fund, Inc.

             Current Fund                         Account
             ------------                         -------
    Principal Aggressive Growth Fund, Inc.        Aggressive Growth Account
    Principal Asset Allocation Fund, Inc.         Asset Allocation Account
    Principal Balanced Fund, Inc.                 Balanced Account
    Principal Bond Fund, Inc.                     Bond Account
    Principal Capital Accumulation Fund, Inc.     Capital Value Account
    Principal Emerging Growth Fund, Inc.          MidCap Account
    Principal Government Securities Fund, Inc.    Government Securities Account
    Principal Growth Fund, Inc.                   Growth Account
    Principal Money Market Fund, Inc              Money Market Account.
    Principal World Fund, Inc.                    International Account

2.  Principal Capital Accumulation Fund,  Principal  Government  Securities
    Fund  and  Principal   Money  Market  Fund  each  will   eliminate  the
    fundamental   investment   restrictions   prohibiting   the  Fund  from
    purchasing  shares of other  investment  companies and  prohibiting the
    Fund from joint participation in any securities trading account.

3.  Principal  Capital  Accumulation  Fund will  eliminate the  fundamental
    investment restrictions prohibiting the Fund from purchasing restricted
    securities and from investing in repurchase  agreements.  The Fund will
    adopt a non-fundamental  investment restriction providing that the Fund
    may not "Invest  more than 15% of its total  assets in  securities  not
    readily marketable and in repurchase  agreements  maturing in more than
    seven days."

4.  Principal  Government  Securities  Fund  will  modify  the  fundamental
    investment restriction  prohibiting the Fund from purchasing other than
    obligations issued or guaranteed by the United States Government or its
    agencies or  instrumentalities.  The Fund will be permitted to maintain
    reasonable amounts in cash or purchase  short-term debt securities that
    are not issued or  guaranteed  by the United  States  Government or its
    agencies or instrumentalities.

5.  Principal  Money  Market  Fund will  amend the  fundamental  investment
    restrictions to allow the Fund to: i) invest more than 5% (but not more
    than 25%) of total Fund assets in the  securities  of a single  issuer;
    ii) purchase the securities of an issuer if the purchase does not cause
    more than 10% of the outstanding  voting securities of the issuer to be
    held by the Fund (other than  securities  issued or  guaranteed  by the
    United  States  Government or its agencies or  instrumentalities);  and
    iii) invest  that  percentage  of its total  assets in  securities  nor
    readily  marketable  as is  allowed  by  federal  securities  rules  or
    interpretations.

     The  Principal(R)  Mutual  Funds  ("Principal  Funds")  described  in  this
Prospectus  are a  family  of  separately  incorporated,  diversified,  open-end
management investment companies, commonly called mutual funds, which provide the
following range of investment objectives:

                              Growth-Oriented Funds

PRINCIPAL  Aggressive  Growth  Fund,  Inc.  seeks to provide  long-term  capital
appreciation by investing  primarily in growth-oriented  common stocks of medium
and large  capitalization  U.S.  corporations and, to a limited extent,  foreign
corporations.

PRINCIPAL  Asset  Allocation  Fund,  Inc.  seeks to generate a total  investment
return consistent with the preservation of capital.

PRINCIPAL  Balanced Fund,  Inc.  seeks to generate a total return  consisting of
current  income and capital  appreciation  while  assuming  reasonable  risks in
furtherance of the investment objective.

PRINCIPAL Capital  Accumulation Fund, Inc. seeks to achieve primarily  long-term
capital  appreciation  and  secondary  growth of investment  income  through the
purchase  primarily  of  common  stocks,  but  the  Fund  may  invest  in  other
securities.

PRINCIPAL  Emerging Growth Fund,  Inc. seeks to achieve capital  appreciation by
investing  primarily  in  securities  of  emerging  and  other   growth-oriented
companies.

PRINCIPAL  Growth  Fund,  Inc.  seeks  growth of capital  through  the  purchase
primarily of common stocks, but the Fund may invest in other securities.

PRINCIPAL World Fund,  Inc. seeks long-term  growth of capital by investing in a
portfolio of equity  securities of companies  domiciled in any of the nations of
the world.

                              Income-Oriented Funds

PRINCIPAL  Bond  Fund,  Inc.  seeks to  provide  as high a level of income as is
consistent with preservation of capital and prudent investment risk.

PRINCIPAL Government Securities Fund, Inc. seeks a high level of current income,
liquidity  and safety of  principal.  The Fund seeks to  achieve  its  objective
through the purchase of  obligations  issued or  guaranteed by the United States
Government  or its  agencies,  with  emphasis on  Government  National  Mortgage
Association  Certificates ("GNMA Certificates").  Fund shares are not guaranteed
by the United States Government.

                                Money Market Fund

PRINCIPAL Money Market Fund, Inc. seeks as high a level of income available from
short-term securities as is considered consistent with preservation of principal
and  maintenance  of liquidity by investing  all of its assets in a portfolio of
money market instruments.

     An investment in the Money Market fund is neither insured nor guaranteed by
the U.S.  Government.  There can be no assurance  the Money Market Funds will be
able to maintain a stable net asset value of $1.00 per share.

     This Prospectus concisely states information about the Principal Funds that
an investor ought to know before  investing.  It should be read and retained for
future reference.

     Additional  information  about the Funds has been filed with the Securities
and Exchange  Commission,  including a document  called  Statement of Additional
Information,  dated May 1, 1997.  The  Statement of  Additional  Information  is
incorporated  by  reference  into this  Prospectus.  A copy of the  Statement of
Additional Information can be obtained free of charge by writing or telephoning:

                             Principal Mutual Funds
                          The Principal Financial Group
                              Des Moines, IA 50392
                            Telephone 1-800-247-4123

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

                   The Date of this Prospectus is May 1, 1997.

                                TABLE OF CONTENTS

                                                                         Page
Summary  ..............................................................    3
Financial Highlights...................................................    5
Investment Objectives, Policies and Restrictions.......................   10
Certain Investment Policies and Restrictions...........................   19
Manager and Sub-Advisors  .............................................   22
Duties Performed by the Manager and Sub-Advisors.......................   23
Managers' Comments.....................................................   24
Determination of Net Asset Value of Fund Shares........................   30
Performance Calculation................................................   31
Income Dividends, Distributions and Tax Status.........................   32
Eligible Purchasers and Purchase of Shares.............................   33
Shareholder Rights ....................................................   33
Redemption of Shares...................................................   34
Additional Information.................................................   35

     This  Prospectus does not constitute an offer to sell, or a solicitation of
an offer to buy, the securities of any of the Funds in any jurisdiction in which
such sale,  offer to sell, or solicitation  may not be lawfully made. No dealer,
salesperson,  or other person has been  authorized to give any information or to
make any  representations,  other than those  contained in this  Prospectus,  in
connection with the offer contained in this  Prospectus,  and, if given or made,
such other information or representations must not be relied upon as having been
authorized by the Funds or the Funds' Manager.

SUMMARY

     The following summarized information should be read in conjunction with the
detailed information appearing elsewhere in this Prospectus.

     The  Principal  Funds are  separately  incorporated,  open-end  diversified
management investment companies.

Who may purchase shares of the Funds?

     Shares of the Funds are  available  only to Eligible  Purchasers  which are
limited to: (a) separate  accounts of Principal Mutual Life Insurance Company or
of other insurance companies; (b) Principal Mutual Life Insurance Company or any
subsidiary or affiliate thereof; (c) trustees or other managers of any qualified
profit  sharing,  incentive or bonus plan  established by Principal  Mutual Life
Insurance  Company or any  subsidiary or affiliate  thereof for the employees of
such  company,  subsidiary  or  affiliate.  The Board of  Directors of each Fund
reserves the right to broaden or limit the designation of Eligible Purchasers.

What do the Funds offer investors?

     Professional Investment Management: Experienced securities analysts provide
each Fund with professional investment management.

     Diversification: Each Fund will diversify by investing in securities issued
by a number of issuers doing business in a variety of industries  and/or located
in different geographical regions. Diversification reduces investment risk.

     Economies of Scale: Pooling individual shareholder's  investments in any of
the Funds creates administrative efficiencies.

     Redeemability:  Upon  request each Fund will redeem its shares and promptly
pay the  investor  the  current  net asset  value of the  shares  redeemed.  See
"Redemption of Shares."

What are the Funds' investment objectives?

                              Growth-Oriented Funds

     The  investment   objective  of  Principal  Aggressive  Growth  Fund,  Inc.
(sometimes  referred to as the Aggressive  Growth Fund) is to provide  long-term
capital appreciation by investing primarily in growth-oriented  common stocks of
medium and large  capitalization  U.S.  corporations  and, to a limited  extent,
foreign corporations.

     The  investment   objective  of  Principal  Asset   Allocation  Fund,  Inc.
(sometimes  referred  to as the Asset  Allocation  Fund) is to  generate a total
investment return consistent with the preservation of capital.  The Fund intends
to pursue a flexible  investment  policy in seeking to achieve  this  investment
objective.

     The  investment  objective  of Principal  Balanced  Fund,  Inc.  (sometimes
referred  to as the  Balanced  Fund)  is to seek  to  generate  a  total  return
consisting of current income and capital  appreciation while assuming reasonable
risks in furtherance of this objective.

     The primary  investment  objective of Principal Capital  Accumulation Fund,
Inc.  (sometimes  referred to as the  Capital  Accumulation  Fund) is  long-term
capital  appreciation  and its  secondary  investment  objective  is  growth  of
investment income.  The Fund seeks to achieve its investment  objectives through
the  purchase  primarily  of  common  stocks,  but the Fund may  invest in other
securities.

     The investment objective of Principal Emerging Growth Fund, Inc. (sometimes
referred to as the Emerging Growth Fund) is to achieve  capital  appreciation by
investing  primarily  in  securities  of  emerging  and  other   growth-oriented
companies.

     The investment objective of Principal Growth Fund, Inc. (sometimes referred
to as the Growth  Fund) is growth of  capital.  The Fund  seeks to  achieve  its
objective  through the  purchase  primarily of common  stocks,  but the Fund may
invest in other securities.

     The investment  objective of Principal World Fund, Inc. (sometimes referred
to as the World Fund) is to seek  long-term  growth of capital by investing in a
portfolio of equity securities domiciled in any of the nations of the world.

                              Income-Oriented Funds

     The investment  objective of Principal Bond Fund, Inc.  (sometimes referred
to as the Bond Fund) is to  provide  as high a level of income as is  consistent
with preservation of capital and prudent investment risk.

     The investment  objective of Principal  Government  Securities  Fund,  Inc.
(sometimes  referred  to as the  Government  Securities  Fund) is to seek a high
level of current  income,  liquidity and safety of principal.  The Fund seeks to
achieve its objective  through the purchase of obligations  issued or guaranteed
by the United States  Government  or its  agencies,  with emphasis on Government
National Mortgage Association  Certificates ("GNMA  Certificates").  Fund shares
are not guaranteed by the United States Government.

                                Money Market Fund

     The investment  objective of Principal Money Market Fund,  Inc.  (sometimes
referred  to as the  Money  Market  Fund) is to seek as high a level of  current
income  available from  short-term  securities as is considered  consistent with
preservation  of principal and  maintenance of liquidity by investing all of its
assets in a portfolio of money market instruments.

     There can be no  assurance  that the  investment  objectives  of any of the
Funds will be realized. See "Investment Objectives, Policies and Restrictions."

Who serves as Manager for the Funds?

     Princor  Management  Corporation,   a  corporation  organized  in  1969  by
Principal Mutual Life Insurance  Company,  is the Manager for each of the Funds.
It is also the dividend  disbursing and transfer agent for the Principal  Funds.
In order to provide  investment  advisory  service for certain funds the Manager
has executed  sub-advisory  agreements  with Invista  Capital  Management,  Inc.
(Balanced Fund,  Growth Fund and World Fund) and Morgan Stanley Asset Management
Inc. (Aggressive Growth Fund and Asset Allocation Fund).  Subsequent  references
to these corporations may be as "Invista", "MSAM" or "Sub-Advisor". See "Manager
and Sub-Advisors."

What fees and expenses apply to ownership of shares of the Funds?

     The following  table  depicts fees and expenses  applicable to the purchase
and ownership of shares of each of the Funds.

                         ANNUAL FUND OPERATING EXPENSES
                     (As a Percentage of Average Net Assets)

                                Management          Other       Total Operating
              Fund                  Fee           Expenses         Expenses
  Aggressive Growth Fund           .80%             .05%             .85%
  Asset Allocation Fund            .80%             .07%             .87%
  Balanced Fund                    .60%             .03%             .63%
  Bond Fund                        .50%             .03%             .53%
  Capital Accumulation Fund        .48%             .01%             .49%
  Emerging Growth Fund             .64%             .02%             .66%
  Government Securities Fund       .50%             .02%             .52%
  Growth Fund                      .50%             .02%             .52%
  Money Market Fund                .50%             .06%             .56%
  World Fund                       .75%             .15%             .90%

                                     EXAMPLE

     You would pay the following expenses on a $1,000  investment,  assuming (1)
     5% annual return and (2) redemption at the end of each time period:

                                                 Period (in years)
                                   ---------------------------------------------
               Fund                  1            3            5            10
   Aggressive Growth Fund           $9           $27          $47          $105
   Asset Allocation Fund            $9           $28          $48          $107
   Balanced Fund                    $6           $20          $35           $79
   Bond Fund                        $5           $17          $30           $66
   Capital Accumulation Fund        $5           $16          $27           $62
   Emerging Growth Fund             $7           $21          $37           $82
   Government Securities Fund       $5           $17          $29           $65
   Growth Fund                      $5           $17          $29           $65
   Money Market Fund                $6           $18          $31           $70
   World Fund                       $9           $29          $50          $111

     This Example is based on the Annual Fund  Operating  expenses for each Fund
     described above.  Please remember that the Example should not be considered
     a representation of past or future expenses and that actual expenses may be
     greater or less than shown.

     The purpose of the above table is to assist the  investor in  understanding
the  various  expenses  that an  investor  in the Funds  will bear  directly  or
indirectly. See "Duties Performed by the Manager and Sub-Advisors."

FINANCIAL HIGHLIGHTS

     The following financial  highlights for the periods ended December 31, 1996
and prior thereto are derived from financial  statements which have been audited
by Ernst & Young LLP, independent  auditors,  whose report has been incorporated
by reference herein. The financial highlights should be read in conjunction with
the  financial  statements,  related  notes,  and  other  financial  information
incorporated by reference herein.  Audited financial  statements may be obtained
by shareholders, without charge, by telephoning 1-800-451-5447.

<TABLE>
<CAPTION>
                                                      Income from
                                                  Investment Operations                          Less Distributions                 
                                           ___________________________________  ____________________________________________________
                                                       Net Realized
                                                            and                                                                     
                                 Net Asset              Unrealized    Total      Dividends                  Excess                  
                                 Value at      Net         Gain       from       from Net  Distributions Distributions              
                                 Beginning Investment    (Loss) on  Investment  Investment     from          from         Total     
                                 of Period   Income     Investments Operations    Income   Capital Gains Capital Gains Distributions
Principal Aggressive
Growth  Fund, Inc.
  Year Ended December 31,
<S>                                <C>       <C>        <C>          <C>         <C>       <C>            <C>           <C>      
   1996                            $12.94    $  .11     $ 3.38       $3.49       $(.11)    $(1.80)        $    --       $(1.91)  
   1995                             10.11       .13       4.31        4.44        (.13)     (1.48)             --        (1.61)  
  Period Ended December 31,                                                                                                      
   1994(a)                           9.92       .05        .24         .29        (.05)      (.05)             --         (.10)  
                                                                                                                                 
Principal Asset                                                                                                                  
Allocation Fund, Inc.                                                                                                            
  Year Ended December 31,                                                                                                        
   1996                             11.11       .36       1.06        1.42        (.36)      (.69)             --        (1.05)  
   1995                              9.79       .40       1.62        2.02        (.40)      (.30)             --         (.70)  
  Period Ended December 31,                                                                                                      
   1994(a)                           9.98       .23       (.18)        .05        (.23)      --               (.01)       (.24)  
                                                                                                                                 
Principal Balanced                                                                                       
Fund, Inc.(d)                                                                                                                    
  Year Ended December 31,                                                                                                        
   1996                             13.97       .40       1.41        1.81        (.40)      (.94)             --        (1.34)  
   1995                             11.95       .45       2.44        2.89        (.45)      (.42)             --         (.87)  
   1994                             12.77       .37       (.64)       (.27)       (.37)      (.18)             --         (.55)  
   1993                             12.58       .42        .95        1.37        (.42)      (.76)             --        (1.18)  
  Six Months Ended                                                                                                               
   December 31, 1992(e)             12.93       .23        .75         .98        (.47)      (.86)             --        (1.33)  
  Year Ended June 30,                                                                                                            
   1992                             11.33       .47       1.61        2.08        (.48)      --                --         (.48)  
   1991                             10.79       .54        .59        1.13        (.57)      (.02)             --         (.59)  
   1990                             11.89       .60       (.48)        .12        (.63)      (.59)             --        (1.22)  
   1989                             11.75       .62        .30         .92        (.55)      (.23)             --         (.78)  
  Period Ended June 30,                                                                                                          
   1988(f)                          10.00       .27       1.51        1.78        (.03)      --                --         (.03)  
                                                                                                                                 
Principal Bond Fund, Inc.                                                                                                        
  Year Ended December 31,                                                                                                        
   1996                             11.73       .68       (.40)        .28        (.68)      --                --         (.68)  
   1995                             10.12       .62       1.62        2.24        (.63)      --                --         (.63)  
   1994                             11.16       .72      (1.04)       (.32)       (.72)      --                --         (.72)  
   1993                             10.77       .88        .38        1.26        (.87)      --                --         (.87)  
  Six Months Ended                                                                                                               
   December 31, 1992(e)             11.08       .45        .13         .58        (.89)      --                --         (.89)  
  Year Ended June 30,                                                                                                            
   1992                             10.64       .91        .46        1.37        (.93)      --                --         (.93)  
   1991                             10.72       .94       (.06)        .88        (.96)      --                --         (.96)  
   1990                             10.92       .95       (.21)        .74        (.94)      --                --         (.94)  
   1989                             10.68      1.15        .17        1.32        (.96)      (.12)             --        (1.08)  
  Period Ended June 30,                                                                                                          
   1988(f)                          10.00       .32        .40         .72        (.04)      --                --         (.04)  
                                                                                                                                 
Principal Capital                                                                                        
Accumulation Fund, Inc.                                                                                  
  Year Ended December 31,                                                                                
   1996                             27.80       .57       5.82        6.39        (.58)     (3.77)             --        (4.35)  
   1995                             23.44       .60       6.69        7.29        (.60)     (2.33)             --        (2.93)  
   1994                             24.61       .62       (.49)        .13        (.61)      (.69)             --        (1.30)  
   1993                             25.19       .61       1.32        1.93        (.60)     (1.91)             --        (2.51)  
  Six Months Ended                                                                                                               
   December 31, 1992(e)             26.03       .31       1.84        2.15        (.64)     (2.35)             --        (2.99)  
  Year Ended June 30,                                                                                                            
   1992                             23.35       .65       2.70        3.35        (.67)      --                --         (.67)  
   1991                             22.48       .74       1.22        1.96        (.79)      (.30)             --        (1.09)  
   1990                             23.63       .79        .14         .93        (.81)     (1.27)             --        (2.08)  
   1989                             23.23       .77       1.32        2.09        (.68)     (1.01)             --        (1.69)  
   1988                             27.51       .60      (1.50)       (.90)       (.69)     (2.69)             --        (3.38)  
   1987                             25.48       .40       4.46        4.86        (.50)     (2.33)             --        (2.83)  
</TABLE>
    

<TABLE>
<CAPTION>
                                                                            Ratios/Supplemental Data                               
                                                            ______________________________________________________                 
                                                                                                                                   
                                                                                             Ratio of Net                          
                                    Net Asset                                 Ratio of     Investment                              
                                    Value at                Net Assets at   Expenses to     Income to    Portfolio     Average     
                                      End of      Total     End of Period      Average       Average     Turnover    Commission    
                                     Period      Return    (in thousands)    Net Assets    Net Assets      Rate         Rate       
Principal Aggressive         
Growth  Fund, Inc.           
  Year Ended December 31,    
<S>                                 <C>          <C>          <C>             <C>            <C>          <C>          <C>     
   1996                             $14.52       28.05%       $  90,106        .85%          1.05%        166.9%       $.0541  
   1995                              12.94       44.19%          33,643        .90%          1.34%        172.9%         N/A   
  Period Ended December 31,                                                                                                    
   1994(a)                           10.11        2.59%(b)       13,770       1.03%(c)       1.06%(c)     105.6%(c)      N/A   
                                                                                                                               
Principal Asset                                                                                                                
Allocation Fund, Inc.                                                                                                          
  Year Ended December 31,                                                                                                      
   1996                              11.48       12.92%          61,631        .87%          3.45%        108.2%        .0497  
   1995                              11.11       20.66%          41,074        .89%          4.07%         47.1%         N/A   
  Period Ended December 31,                                                                                                    
   1994(a)                            9.79         .52%(b)       28,041        .95%(c)       4.27%(c)      60.7%(c)      N/A   
                                                                                                                               
Principal Balanced                                                                                                             
Fund, Inc.(d)                                                                                                                  
  Year Ended December 31,                                                                                                      
   1996                              14.44       13.13%          93,158        .63%          3.45%         22.6%        .0417  
   1995                              13.97       24.58%          45,403        .66%          4.12%         25.7%         N/A   
   1994                              11.95       (2.09)%         25,043        .69%          3.42%         31.5%         N/A   
   1993                              12.77       11.06%          21,399        .69%          3.30%         15.8%         N/A   
  Six Months Ended                                                                                                             
   December 31, 1992(e)              12.58        8.00%(b)       18,842        .73%(c)       3.71%(c)      38.4%(c)      N/A   
  Year Ended June 30,                                                                                                          
   1992                              12.93       18.78%          17,344        .72%          3.80%         26.6%         N/A   
   1991                              11.33       11.36%          14,555        .73%          5.27%         27.1%         N/A   
   1990                              10.79         .87%          13,016        .74%          5.52%         33.1%         N/A   
   1989                              11.89        8.55%          12,751        .74%          5.55%         29.3%         N/A   
  Period Ended June 30,                                                                                                        
   1988(f)                           11.75       17.70%(b)       11,469        .80%(c)       4.96%(c)      41.7%(c)      N/A   
                                                                                                                               
Principal Bond Fund, Inc.                                                                                                      
  Year Ended December 31,                                                                                                      
   1996                              11.33        2.36%          63,387        .53%          7.00%          1.7%         N/A   
   1995                              11.73       22.17%          35,878        .56%          7.28%          5.9%         N/A   
   1994                              10.12       (2.90)%         17,108        .58%          7.86%         18.2%         N/A   
   1993                              11.16       11.67%          14,387        .59%          7.57%         14.0%         N/A   
  Six Months Ended                                                                                                             
   December 31, 1992(e)              10.77        5.33%(b)        12,790       .62%(c)      8.10%(c)       6.7%(c)       N/A   
  Year Ended June 30,                                                                                                          
   1992                              11.08       13.57%           12,024       .62%         8.47%          6.1%          N/A   
   1991                              10.64        8.94%           10,552       .63%         9.17%          2.7%          N/A   
   1990                              10.72        7.15%            9,658       .64%         9.09%          0.0%          N/A   
   1989                              10.92       13.51%            9,007       .64%         9.18%         12.2%          N/A   
  Period Ended June 30,                                                                                                        
   1988(f)                           10.68        6.06%(b)        17,598       .58%(c)      8.11%(c)      68.8%(c)       N/A   
                                                                                                                               
Principal Capital                                                                                                              
Accumulation Fund, Inc.                                                                                                        
  Year Ended December 31,                                                                                                      
   1996                              29.84       23.50%          205,019       .49%         2.06%         48.5%         .0426  
   1995                              27.80       31.91%          135,640       .51%         2.25%         49.2%          N/A   
   1994                              23.44         .49%          120,572       .51%         2.36%         44.5%          N/A   
   1993                              24.61        7.79%          128,515       .51%         2.49%         25.8%          N/A   
  Six Months Ended                                                                                                             
   December 31, 1992(e)              25.19        8.81%(b)       105,355       .55%(c)      2.56%(c)      39.7%(c)       N/A   
  Year Ended June 30,                                                                                                          
   1992                              26.03       14.53%           94,596       .54%         2.65%         34.8%          N/A   
   1991                              23.35        9.46%           76,537       .53%         3.53%         14.0%          N/A   
   1990                              22.48        3.94%           74,008       .56%         3.56%         30.2%          N/A   
   1989                              23.63       10.02%           68,132       .57%         3.53%         23.5%          N/A   
   1988                              23.23       (2.67)%          62,696       .60%         2.76%         26.7%          N/A   
   1987                              27.51       22.17%           57,478       .63%         1.99%         16.1%          N/A   
</TABLE>
                                                                                
Notes to financial highlights                                                   
                                                                                
(a)  Period from June 1, 1994,  date  shares  first  offered to public,  through
     December 31, 1994. Net investment  income,  aggregating  $.01 per share for
     Principal  Aggressive  Growth Fund,  Inc. and $.01 per share for  Principal
     Asset  Allocation  Fund,  Inc. for the period from the initial  purchase of
     shares on May 23, 1994 through May 31, 1994, was recognized,  none of which
     was distributed to the sole  stockholder,  Principal  Mutual Life Insurance
     Company, during the period. Additionally, Principal Aggressive Growth Fund,
     Inc. and Principal Asset Allocation Fund, Inc.  incurred  unrealized losses
     on investments of $.09 and $.03 per share, respectively, during the initial
     interm  period.  This  represented  activities  of each  fund  prior to the
     initial public offering of fund shares.                                    
                                                                                
(b)  Total return amounts have not been annualized.                             
                                                                                
(c)  Computed on an annualized basis.                                           
                                                                                
(d)  Effective May 1, 1994, the name of Principal Managed Fund, Inc. was changed
     to Principal Balanced Fund, Inc.                                           
                                                                                
(e)  Effective July 1, 1992 the fund changed its fiscal year end from June 30 to
     December 31.                                                               
                                                                                
(f)  Period  from  December  18,  1987,  date shares  first  offered to eligible
     purchasers,  through June 30, 1988. Net investment income  aggregating $.01
     per share for the period  from the  initial  purchase of shares on December
     10,  1987  through  December  17,  1987 was  recognized,  all of which  was
     distributed to the Fund's sole stockholder, Principal Mutual Life Insurance
     Company.  This  represented  activity  of the  fund  prior  to the  initial
     offering of shares to eligible purchasers.                                 
                                                                                
<TABLE>
<CAPTION>
                                                      Income from               
                                                  Investment Operations                          Less Distributions                 
                                           ___________________________________  ____________________________________________________
                                                       Net Realized                                                    
                                                            and                                                                     
                                 Net Asset              Unrealized    Total      Dividends                  Excess                  
                                 Value at      Net         Gain       from       from Net  Distributions Distributions              
                                 Beginning Investment    (Loss) on  Investment  Investment     from          from         Total     
                                 of Period   Income     Investments Operations    Income   Capital Gains Capital Gains Distributions
Principal Emerging Growth
Fund, Inc. (a)
  Year Ended December 31,
<S>                                <C>        <C>         <C>         <C>         <C>        <C>            <C>       <C>      
   1996                            $25.33     $.22        $5.07       $5.29       $(.22)     $(.66)         $ --      $  (.88) 
   1995                             19.97      .22         5.57        5.79        (.22)      (.21)           --         (.43) 
   1994                             20.79      .14          .03         .17        (.14)      (.85)           --         (.99) 
   1993                             18.91      .17         3.47        3.64        (.17)     (1.59)           --        (1.76) 
  Six Months Ended                                                                                         
   December 31, 1992(b)             15.97      .10         3.09        3.19        (.21)      (.04)           --         (.25) 
  Year Ended June 30,                                                                                      
   1992                             13.93      .21         2.04        2.25        (.21)       --             --         (.21) 
   1991                             14.25      .20          .50         .70        (.23)      (.79)           --        (1.02) 
   1990                             13.35      .24          .87        1.11        (.20)      (.01)           --         (.21) 
   1989                             12.85      .16         1.35        1.51        (.11)      (.90)           --        (1.01) 
  Period Ended June 30,                                                                                    
   1988(e)                          10.00      .05         2.83        2.88        (.03)       --             --         (.03) 
                                                                                                           
Principal Government                                                                                       
Securities Fund, Inc.                                                                                      
  Year Ended December 31,                                                                                  
   1996                             10.55      .59         (.24)        .35        (.59)       --             --         (.59) 
   1995                              9.38      .60         1.18        1.78        (.61)       --             --         (.61) 
   1994                             10.61      .76        (1.24)       (.48)       (.75)       --             --         (.75) 
   1993                             10.28      .71          .33        1.04        (.71)       --             --         (.71) 
  Six Months Ended                                                                                         
   December 31, 1992(b)             10.93      .40          .04         .44        (.78)       --            (.31)      (1.09) 
  Year Ended June 30,                                                                                      
   1992                             10.24      .80          .71        1.51        (.81)       --            (.01)       (.82) 
   1991                             10.05      .80          .24        1.04        (.81)       --            (.04)       (.85) 
   1990                             10.05      .78           --         .78        (.78)       --             --         (.78) 
   1989                              9.37      .80          .34        1.14        (.46)       --             --         (.46) 
   1988                              9.47      .78         (.09)        .69        (.79)       --             --         (.79) 
  Period Ended June 30,                                                                                    
   1987(f)                          10.00      .18         (.59)       (.41)       (.12)       --             --         (.12) 
                                                                                                           
Principal Growth Fund, Inc.                                                                                
  Year Ended December 31,                                                                                  
   1996                             12.43      .16         1.39        1.55        (.16)      (.03)           --         (.19) 
   1995                             10.10      .17         2.42        2.59        (.17)       --            (.09)       (.26) 
  Period Ended December 31,                                                                                
   1994(g)                           9.60      .07          .51         .58        (.08)       --             --         (.08) 
                                                                                                           
Principal Money Market                                                                                     
Fund, Inc.                                                                                                 
  Year Ended December 31,                                                                                  
   1996                              1.000     .049          --         .049       (.049)      --             --         (.049)
   1995                              1.000     .054          --         .054       (.054)      --             --         (.054)
   1994                              1.000     .037          --         .037       (.037)      --             --         (.037)
   1993                              1.000     .027          --         .027       (.027)      --             --         (.027)
  Six Months Ended                                                                                         
   December 31, 1992(b)              1.000     .016          --         .016       (.016)      --             --         (.016)
  Year Ended June 30,                                                                                      
   1992                              1.000     .046          --         .046       (.046)      --             --         (.046)
   1991                              1.000     .070          --         .070       (.070)      --             --         (.070)
   1990                              1.000     .077          --         .077       (.077)      --             --         (.077)
   1989                              1.000     .083          --         .083       (.083)      --             --         (.083)
   1988                              1.000     .064          --         .064       (.064)      --             --         (.064)
   1987                              1.000     .057          --         .057       (.057)      --             --         (.057)
                                                                                                           
Principal World Fund, Inc.                                                                                 
  Year Ended December 31,                                                                                  
   1996                             10.72      .22         2.46        2.68        (.22)      (.16)           --         (.38) 
   1995                              9.56      .19         1.16        1.35        (.18)       --            (.01)       (.19) 
  Period Ended December 31,                                                                                
   1994(g)                           9.94      .03         (.33)       (.30)       (.05)      (.02)          (.01)       (.08) 
</TABLE>

                                                   
<TABLE>
<CAPTION>
                                                                            Ratios/Supplemental Data                               
                                                            ______________________________________________________                 
                                                                                                                                   
                                                                                             Ratio of Net                          
                                    Net Asset                                 Ratio of     Investment                              
                                    Value at                Net Assets at   Expenses to     Income to    Portfolio     Average     
                                      End of      Total     End of Period      Average       Average     Turnover    Commission    
                                     Period      Return    (in thousands)    Net Assets    Net Assets      Rate         Rate       
Principal Emerging Growth     
Fund, Inc. (a)                
  Year Ended December 31,     
<S>                                   <C>         <C>          <C>             <C>           <C>           <C>         <C>       
   1996                               $29.74      21.11%       $137,161         .66%         1.07%          8.8%       $.0379    
   1995                                25.33      29.01%         58,520         .70%         1.23%         13.1%         N/A     
   1994                                19.97        .78%         23,912         .74%         1.15%         12.0%         N/A     
   1993                                20.79      19.28%         12,188         .78%          .89%         22.4%         N/A     
  Six Months Ended                                                                                                               
   December 31, 1992(b)                18.91      20.12%(c)       9,693         .81%(d)      1.24%(d)       8.6%(d)      N/A     
  Year Ended June 30,                                                                                                            
   1992                                15.97      16.19%          7,829         .82%         1.33%         10.1%         N/A     
   1991                                13.93       5.72%          6,579         .89%         1.70%         11.1%         N/A     
   1990                                14.25       8.32%          6,067         .88%         1.74%         17.9%         N/A     
   1989                                13.35      13.08%          5,509         .90%         1.31%         21.4%         N/A     
  Period Ended June 30,                                                                                                          
   1988(e)                             12.85      28.72%(c)       4,857         .94%(d)       .64%(d)       4.6%(d)      N/A     
                                                                                                                                 
Principal Government                                                                                                             
Securities Fund, Inc.                                                                                                            
  Year Ended December 31,                                                                                                        
   1996                                10.31       3.35%         85,100         .52%         6.46%          8.4%         N/A     
   1995                                10.55      19.07%         50,079         .55%         6.73%          9.8%         N/A     
   1994                                 9.38      (4.53)%        36,121         .56%         7.05%         23.2%         N/A     
   1993                                10.61      10.07%         36,659         .55%         7.07%         20.4%         N/A     
  Six Months Ended                                                                                                               
   December 31, 1992(b)                10.28       4.10%(c)      31,760         .59%(d)      7.35%(d)      34.5%(d)      N/A     
  Year Ended June 30,                                                                                                            
   1992                                10.93      15.34%         33,022         .58%         7.84%         38.9%         N/A     
   1991                                10.24      10.94%         26,021         .59%         8.31%          4.2%         N/A     
   1990                                10.05       8.16%         21,488         .61%         8.48%         18.7%         N/A     
   1989                                10.05      12.61%         15,890         .63%         8.68%          3.7%         N/A     
   1988                                 9.37       7.69%         12,902         .66%         8.47%          2.7%         N/A     
  Period Ended June 30,                                                                                                          
   1987(f)                              9.47       (.94)%(c)     10,778         .64%(d)      8.50%(d)       0.2%(d)      N/A     
                                                                                                                                 
Principal Growth Fund, Inc.                                                                                                      
  Year Ended December 31,                                                                                                        
   1996                                13.79      12.51%         99,612         .52%         1.61%          2.0%        .0401    
   1995                                12.43      25.62%         42,708         .58%         2.08%          6.9%         N/A     
  Period Ended December 31,                                                                                                      
   1994(g)                             10.10       5.42%(c)      13,086         .75%(d)      2.39%(d)       0.9%(d)      N/A     
                                                                                                                                 
Principal Money Market                                                                                                           
Fund, Inc.                                                                                                                       
  Year Ended December 31,                                                                                                        
   1996                                 1.000      5.07%         46,244         .56%         5.00%           N/A         N/A     
   1995                                 1.000      5.59%         32,670         .58%         5.32%           N/A         N/A     
   1994                                 1.000      3.76%         29,372         .60%         3.81%           N/A         N/A     
   1993                                 1.000      2.69%         22,753         .60%         2.64%           N/A         N/A     
  Six Months Ended                                                                                                               
   December 31, 1992(b)                 1.000      1.54%(c)      27,680         .59%(d)      3.10%(d)        N/A         N/A     
  Year Ended June 30,                                                                                                            
   1992                                 1.000      4.64%         25,194         .57%         4.54%           N/A         N/A     
   1991                                 1.000      7.20%         26,509         .56%         6.94%           N/A         N/A     
   1990                                 1.000      8.37%         26,588         .57%         8.05%           N/A         N/A     
   1989                                 1.000      8.59%         20,707         .61%         8.40%           N/A         N/A     
   1988                                 1.000      6.61%         14,571         .64%         6.39%           N/A         N/A     
   1987                                 1.000      5.78%         11,902         .65%         5.68%           N/A         N/A     
                                                                                                                                 
Principal World Fund, Inc.                                                                                                       
  Year Ended December 31,                                                                                                        
   1996                                13.02      25.09%         71,682         .90%         2.28%         12.5%        .0120    
   1995                                10.72      14.17%         30,566         .95%         2.26%         15.6%         N/A     
  Period Ended December 31,                                                                                                      
   1994(g)                              9.56      (3.37)%(c)     13,746        1.24%(d)      1.31%(d)      14.4%(d)      N/A     
</TABLE>
                                                           
Notes to financial highlights 

(a)  Effective May 1, 1992, the name of Principal  Aggressive  Growth Fund, Inc.
     was changed to Principal Emerging Growth Fund, Inc.

(b)  Effective July 1, 1992 the fund changed its fiscal year end from June 30 to
     December 31.

(c)  Total return amounts have not been annualized.

(d)  Computed on an annualized basis.

(e)  Period  from  December  18,  1987,  date shares  first  offered to eligible
     purchasers,  through June 30, 1988. Net investment income  aggregating $.01
     per share for the period  from the  initial  purchase of shares on December
     10,  1987  through  December  17,  1987 was  recognized,  all of which  was
     distributed to the Fund's sole stockholder, Principal Mutual Life Insurance
     Company.  This  represented  activity  of the  fund  prior  to the  initial
     offering of shares to eligible purchasers.

(f)  Period from April 9, 1987, date shares first offered to the public, through
     June 30, 1987. Net investment  income,  aggregating  $.01 per share for the
     period  from the initial  purchase  of shares on October  31, 1987  through
     December  17,  1987 was  recognized,  all of which was  distributed  to the
     Fund's sole  stockholder,  Principal  Mutual Life Insurance  Company.  This
     represented activity of the Fund prior to the initial offering of shares to
     eligible purchasers.

(g)  Period from May 1, 1994,  date shares first offered to the public,  through
     December 31, 1994. Net investment  income,  aggregating  $.01 per share for
     Principal  Growth Fund,  Inc. and $.04 per share for Principal  World Fund,
     Inc.  for the period from the initial  purchase of shares on March 23, 1994
     through April 30, 1994, was  recognized,  none of which was  distributed to
     the sole stockholder,  Principal Mutual Life Insurance Company,  during the
     period. Additionally, Principal Growth Fund, Inc. and Principal World Fund,
     Inc. incurred  unrealized losses on investments of $.41 and $.10 per share,
     respectively,   during  the  initial  interim  period.   This   represented
     activities  of each  fund  prior to the  initial  public  offering  of fund
     shares.

INVESTMENT OBJECTIVES, POLICIES AND RESTRICTIONS

     The investment  objectives  and policies of each Fund are described  below.
There can be no assurance that the objectives of the Funds will be realized.

GROWTH-ORIENTED FUNDS

     The  Principal  Funds  currently  include  five Funds  which  seek  capital
appreciation  through  investments in equity  securities  (Principal  Aggressive
Growth Fund,  Principal Capital  Accumulation  Fund,  Principal  Emerging Growth
Fund, Principal Growth Fund and Principal World Fund) and two Funds which seek a
total investment  return including both capital  appreciation and income through
investments in equity and debt securities  (Principal  Asset Allocation Fund and
Principal Balanced Fund). These seven Funds are collectively  referred to as the
Growth-Oriented Funds.

     The  Growth-Oriented  Funds may invest in the following equity  securities:
common stocks;  preferred  stocks and debt securities that are convertible  into
common  stock,  that carry  rights or warrants to purchase  common stock or that
carry rights to participate  in earnings;  rights or warrants to subscribe to or
purchase any of the foregoing securities; and American Depositary Receipts based
on any of the foregoing securities. The Aggressive Growth, Capital Accumulation,
Emerging  Growth,  Growth and World Funds will seek to be fully  invested  under
normal conditions in equity  securities.  When, in the opinion of the Manager or
Sub-Advisor,  current market or economic  conditions  warrant, a Growth-Oriented
Fund may for temporary  defensive  purposes place all or a portion of its assets
in cash,  on  which  the Fund  would  earn no  income,  cash  equivalents,  bank
certificates of deposit, bankers acceptances,  repurchase agreements, commercial
paper,  commercial  paper master notes which are floating rate debt  instruments
without a fixed maturity,  United States  Government  securities,  and preferred
stocks and debt  securities,  whether or not convertible into or carrying rights
for common stock. A Growth-Oriented Fund may also maintain reasonable amounts in
cash or short-term debt securities for daily cash management purposes or pending
selection of particular long-term investments.

Principal Aggressive Growth Fund

     The Aggressive Growth Fund's  investment  objective is to provide long-term
capital appreciation by investing primarily in growth-oriented  common stocks of
medium and large  capitalization  U.S.  corporations  and, to a limited  extent,
foreign  corporations.  Common stocks for this purpose include common stocks and
equivalents,  such as securities  convertible  into common stocks and securities
having  common  stock  characteristics,  such as rights and warrants to purchase
common stocks. Under normal circumstances,  the Fund will invest at least 65% of
the value of its total assets in common stocks.

     The Fund employs a flexible and eclectic  investment  process in pursuit of
its investment  objective.  In selecting  stocks for the Fund, the  Sub-Advisor,
MSAM,  concentrates on a universe of rapidly growing, high quality companies and
lower but accelerating earnings growth situations. The Sub-Advisor's universe of
potential investments generally comprises companies with market  capitalizations
of $750 million or more and is not restricted to specific  market  sectors.  The
Sub-Advisor uses its research capabilities, analytical resources and judgment to
assess  economic,  industry and market  trends,  as well as  individual  company
developments,   to  select  promising  growth  investments  for  the  Fund.  The
Sub-Advisor concentrates on companies with strong, communicative managements and
clearly defined strategies for growth. In addition,  the Sub-Advisor  rigorously
assesses  company  developments,   including  changes  in  strategic  direction,
management  focus and current and likely future earnings  results.  Valuation is
important  to the  Sub-Advisor  but is viewed in the  context of  prospects  for
sustainable  earnings growth and the potential for positive  earnings  surprises
vis-a-vis consensus expectations. The Fund is free to invest in any common stock
which in the Sub-Advisor's judgment provides above average potential for capital
appreciation.

     In  selecting   investments  for  the  Fund,  the  Sub-Advisor   emphasizes
individual  security  selection.   The  Fund's  investments  will  generally  be
diversified by industry but  concentrated  sector  positions may result from the
investment process.  The Fund has a long-term investment  perspective;  however,
the  Sub-Advisor  may  take  advantage  of  short-term  opportunities  that  are
consistent with its objective by selling  recently  purchased  securities  which
have increased in value.

     The Fund may invest in common stock and convertible  securities of domestic
and foreign corporations.  However, the Fund does not expect to invest more than
25% of its  total  assets  at the time of  purchase  in  securities  of  foreign
companies.  The Fund may invest in securities of foreign issuers  directly or in
the form of Depositary Receipts. The Fundmay enter into forward foreign currency
exchange  contracts which provide for the purchase or sale of foreign currencies
in connection with the settlement of foreign securities transactions or to hedge
the underlying currency exposure related to foreign  investments.  The Fund will
not enter into these  commitments for  speculative  purposes.  Investors  should
recognize  that  investing  in  foreign   companies   involves  certain  special
considerations  which  are  not  typically  associated  with  investing  in U.S.
companies. See "Foreign Securities" and "Currency Contracts."

     The Fund may invest in convertible  securities of domestic and,  subject to
the  above  restrictions,  foreign  issuers  on  occasions  when,  due to market
conditions,  it is more  advantageous  to purchase such  securities  than common
stock.  Convertible securities entitle the holder to exchange the securities for
a specified  number of shares of common stock,  usually of the same company,  at
specified  prices  within a certain  period of time and to receive  interest  or
dividends  until the holder elects to exercise the conversion  privilege.  Since
the Fund invests in both common stocks and convertible securities,  the risks of
investing  in the  general  equity  markets  may be  tempered to a degree by the
Fund's investments in convertible  securities which are often not as volatile as
equity securities.

Principal Asset Allocation Fund

     The Asset  Allocation  Fund  seeks to  generate a total  investment  return
consistent with  preservation  of capital.  In seeking to achieve its objective,
the Fund intends to pursue a flexible  investment policy by investing  primarily
in the common stock and other securities having common stock  characteristics of
large and small  domestic or foreign  companies  that  appear to be  undervalued
relative  to their  earnings  results or  potential,  or whose  earnings  growth
prospects appear to be more attractive than the economy as a whole, and domestic
or foreign fixed-income securities, including high yield securities when, in the
judgement of the Sub-Advisor, MSAM, it is appropriate to do so.

     The securities in which the Fund invests will be identified as belonging to
an "asset  class."  Asset  classes may  include,  but are not limited to,  small
capitalization  (companies  whose  market  value is less than $1 billion)  value
stocks,  large  capitalization  (companies  with a market  value in excess of $1
billion) value stocks, small capitalization  growth stocks, large capitalization
growth  stocks,  common stocks of foreign  corporations,  domestic  fixed-income
securities,  domestic high yield fixed-income  securities,  foreign fixed-income
securities,  and money market instruments (debt securities  maturing in one year
or less).  "Value"  stocks are generally  defined as companies  with  distinctly
below  average  stock  price to  earnings  ratios and stock  price to book value
ratios,  and higher than average dividend yields.  "Growth" stocks are generally
defined as those companies whose earnings are expected to grow more rapidly than
the economy as a whole.

     The allocation among asset classes is designed to lessen overall investment
risk  through  participation  in a variety  of types of  investments  in several
markets.  Reallocation among asset classes, or the elimination of an asset class
for a period of time, will occur when in the Sub-Advisor's  judgement such shift
offers the  investor  better  prospects  of  achieving  the  overall  investment
objective  of the Fund.  Under  normal  conditions,  abrupt  shifts  among asset
classes  will not occur and it is not the policy of the  Sub-Advisor  to attempt
market timing. The Sub-Advisor does not undertake to maintain a specific portion
of the Fund in any asset class,  but expects that over time the  investment  mix
will be within  the  following  ranges:  25% to 75% in  equities,  20% to 60% in
fixed-income  securities  and 0% to 40% in  money  market  instruments.  Factors
involved with this decision will depend upon the judgement of the Sub-Advisor as
to general  market and economic  conditions,  trends and  investment  yields and
interest rates and changes in fiscal or monetary policies.  The Sub-Advisor will
seek to minimize declines in the net asset value per share; however, there is no
guarantee this goal can be achieved.

     The Fund may invest in all types of common  stocks and other  equities  and
investments, without regard to any objective investment criteria such as size of
the issue or issuer, exchange listing or seasoning.  The Fund may invest in both
exchange listed and over-the-counter  securities,  including American Depositary
Receipts  ("ADRs")  and closed  end mutual  funds.  The  Fund's  investments  in
corporate  bonds and debentures and money market  instruments are not restricted
by credit ratings or other objective investment criteria, except with respect to
bank  certificates of deposit as set forth below.  See  "Below-Investment  Grade
Bonds" for a discussion of the risks associated with these securities. Normally,
investments  in below  investment  grade bonds are not expected to exceed 20% of
Fund assets.  Securities purchases may be either U.S. dollar or Non-U.S.  dollar
denominated.

     To achieve its investment  objective,  the Fund may at times  emphasize the
generation  of  interest  income  by  investing  in short,  medium or  long-term
fixed-income securities.  Investment in those securities may also be made with a
view to  realizing  capital  appreciation  when the  Sub-Advisor  believes  that
declining interest rates may increase market values.

     Money  market  instruments  in which the Fund may invest may  include  U.S.
Treasury bills, bank certificates of deposit,  bankers  acceptances,  repurchase
agreements,  commercial  paper  and  commercial  paper  master  notes  which are
floating rate debt  instruments  without a fixed maturity,  and non-U.S.  dollar
denominated money market instruments. The Fund will only invest in domestic bank
certificates of deposit issued by banks which are members of the Federal Reserve
System that have total deposits in excess of $1 billion.

     The Fund may invest in U.S. government  securities  including U.S. Treasury
obligations and obligations of certain agencies such as the Government  National
Mortgage  Association  which are  supported  by the full faith and credit of the
United  States,  as well as  obligations  of certain other  federal  agencies or
instrumentalities  which are  backed  only by the right of the  issuer to borrow
limited funds from the U.S. Treasury, by the discretionary authority of the U.S.
government  to  purchase  such  obligations  or by the  credit of the  agency or
instrumentality itself.

Principal Balanced Fund

     The investment  objective of Principal Balanced Fund is to generate a total
return  consisting of current  income and capital  appreciation  while  assuming
reasonable  risks  in  furtherance  of  the  investment   objective.   The  term
"reasonable  risks" refers to investment  decisions  that in the judgment of the
Sub-Advisor, Invista, do not present a greater than normal risk of loss in light
of current or  anticipated  future  market and  economic  conditions,  trends in
yields and interest rates, and fiscal and monetary policies.

     In seeking to achieve the investment objective,  the Fund invests primarily
in growth and income-oriented  common stocks (including  securities  convertible
into common stocks),  corporate bonds and debentures and short-term money market
instruments.  The Fund may also invest in other equity  securities,  and in debt
securities issued or guaranteed by the United States Government and its agencies
or  instrumentalities.  The Fund seeks to generate real (inflation  plus) growth
during  favorable  investment  periods  and may  emphasize  income  and  capital
preservation  strategies during uncertain  investment  periods.  The Sub-Advisor
will seek to minimize declines in the net asset value per share. However,  there
is no guarantee that the Sub-Advisor will be successful in achieving this goal.

     The portions of the Fund's total assets invested in equity securities, debt
securities  and  short-term  money market  instruments  are not fixed,  although
ordinarily  40% to 70% of the  Fund's  portfolio  will  be  invested  in  equity
securities with the balance of the portfolio  invested in debt  securities.  The
investment  mix will vary from time to time  depending  upon the judgment of the
Sub-Advisor as to general market and economic  conditions,  trends in investment
yields and interest rates and changes in fiscal or monetary policies.

     The Fund may  invest  in all  types  of  common  stocks  and  other  equity
investments, without regard to any objective investment criteria such as size of
the issue or issuer, exchange listing or seasoning.  The Fund may invest in both
exchange-listed and  over-the-counter  securities,  in small or large companies,
and in well-established or unseasoned companies. Also, the Fund's investments in
corporate  bonds and debentures and money market  instruments are not restricted
by credit ratings or other objective investment criteria, except with respect to
bank  certificates  of  deposit  as set forth  below.  Some of the fixed  income
securities in which the Fund may invest may be considered to include speculative
characteristics  and the Fund may purchase such  securities  that are in default
but does not currently intend to invest more than 5% of its assets in securities
rated  below  BBB  by   Standard  &  Poor's  or  Baa  by  Moody's.   See  "Below
Investment-Grade  Bonds" for a  discussion  of the risks  associated  with these
securities.  The rating  services'  descriptions of BBB or Baa securities are as
follows:  Moody's Investors  Service,  Inc. Bond Ratings -- Baa: Bonds which are
rated Baa are  considered as medium grade  obligations,  i.e.,  they are neither
highly protected nor poorly secured.  Interest  payments and principal  security
appear adequate for the present but certain  protective  elements may be lacking
or may be  characteristically  unreliable  over any great  length of time.  Such
bonds lack outstanding  investment  characteristics and in fact have speculative
characteristics as well. Standard & Poor's Corporation Bond Ratings -- 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 for debt in  higher-rated  categories.  The Fund will not  concentrate  its
investments in any industry.

     In selecting  common  stocks,  the  Sub-Advisor  seeks  companies  which it
believes have predictable  earnings  increases and which,  based on their future
growth  prospects,  may be currently  undervalued  in the market  place.  During
periods when the  Sub-Advisor  determines that general  economic  conditions are
favorable,  it will  generally  purchase  common  stocks with the  objective  of
long-term  capital  appreciation.  From time to time, and in periods of economic
uncertainty,  the Sub-Advisor may purchase common stocks with the expectation of
price appreciation over a relatively short period of time.

     To achieve its investment  objective,  the Fund may at times  emphasize the
generation of interest  income by investing in short,  medium or long-term  debt
securities.  Investment  in debt  securities  may  also  be made  with a view to
realizing capital appreciation when the Manager believes that declining interest
rates may increase  market  values.  The Fund may also purchase  "deep  discount
bonds," i.e., bonds which are selling at a substantial  discount from their face
amount, with a view to realizing capital appreciation.

     The  short-term  money  market  investments  in which  the Fund may  invest
include the  following:  U.S.  Treasury  bills,  bank  certificates  of deposit,
bankers'  acceptances,  repurchase  agreements,  commercial paper and commercial
paper  master  notes which are floating  rate debt  instruments  without a fixed
maturity.  The Fund will only invest in domestic  bank  certificates  of deposit
issued by banks which are members of the Federal  Reserve System that have total
deposits in excess of $1 billion.

     The  United  States  government  securities  in which  the Fund may  invest
include U.S. Treasury  obligations and obligations of certain agencies,  such as
the Government  National Mortgage  Association,  which are supported by the full
faith and credit of the United  States,  as well as obligations of certain other
Federal agencies or  instrumentalities,  such as the Federal  National  Mortgage
Association,  Federal  Land Banks and the Federal  Farm  Credit  Administration,
which are backed  only by the right of the issuer to borrow  limited  funds from
the U.S.  Treasury,  by the  discretionary  authority of the U.S.  Government to
purchase  such  obligations  or by the credit of the  agency or  instrumentality
itself.

Principal Capital Accumulation Fund

     The primary objective of Principal  Capital  Accumulation Fund is long-term
capital appreciation. A secondary objective is growth of investment income.

     The Fund will invest primarily in common stocks, but it may invest in other
securities.  In making  selections  for the  Fund's  investment  portfolio,  the
Manager will use an approach described broadly as that of fundamental  analysis,
which is discussed in the Statement of Additional Information. In pursuit of the
Fund's investment objectives,  investments will be made in securities which as a
group  appear to offer  long-term  prospects  for  capital  and  income  growth.
Securities  chosen for  investment  may  include  those of  companies  which the
Manager  believes  can  reasonably  be  expected  to share in the  growth of the
nation's economy over the long term.

Principal Emerging Growth Fund

     The  objective  of  Principal  Emerging  Growth Fund is to achieve  capital
appreciation.  The  strategy of this Fund is to invest  primarily  in the common
stocks and securities  (both debt and preferred  stock)  convertible into common
stocks of emerging and other growth-oriented  companies that, in the judgment of
the Manager,  are  responsive  to changes  within the  marketplace  and have the
fundamental  characteristics  to support  growth.  In pursuing its  objective of
capital  appreciation,  the Emerging  Growth Fund may invest,  for any period of
time, in any industry, in any kind of growth-oriented  company,  whether new and
unseasoned or well known and established.

     There  can be, of  course,  no  assurance  that the Fund  will  attain  its
objective.  Investment  in  emerging  and other  growth-oriented  companies  may
involve  greater risk than  investment  in other  companies.  The  securities of
growth-oriented  companies  may be  subject  to more  abrupt or  erratic  market
movements,  and many of them may have limited product lines, markets,  financial
resources or management. Because of these factors and of the length of time that
may be required  for full  development  of the growth  prospects  of some of the
companies  in which the Fund  invests,  the Fund  believes  that its  shares are
suitable  only  for  persons  who  are  prepared  to  experience   above-average
fluctuations  in net asset value,  to assume  above-average  investment  risk in
search  of  above-average  return,  and to  consider  the  Fund  as a  long-term
investment and not as a vehicle for seeking short-term profits.  Moreover, since
the  Fund  will not be  seeking  current  income,  investors  should  not view a
purchase of Fund shares as a complete investment program.

Principal Growth Fund

     The objective of Principal Growth Fund is growth of capital. Realization of
current income will be incidental to the objective of growth of capital.

     The Fund will invest primarily in common stocks, but it may invest in other
equity securities. In making selections for the Fund's investment portfolio, the
Sub-Advisor,  Invista,  will  use an  approach  described  broadly  as  that  of
fundamental  analysis,  which  is  discussed  in  the  Statement  of  Additional
Information. In pursuit of the Fund's investment objective,  investments will be
made in securities which as a group appear to possess potential for appreciation
in market  value.  Common  stocks  chosen for  investment  may include  those of
companies  which have a record of sales and  earnings  growth  that  exceeds the
growth rate of  corporate  profits of the S&P 500 or which offer new products or
new services.  The policy of investing in securities which have a high potential
for  growth of  capital  can mean that the  assets of the Fund may be subject to
greater risk than securities which do not have such potential.

Principal World Fund

     The  investment  objective  of  Principal  World Fund is to seek  long-term
growth of capital  through  investment  in a portfolio of equity  securities  of
companies domiciled in any of the nations of the world. In choosing  investments
in equity securities of foreign and United States corporations, the Sub-Advisor,
Invista, intends to pay particular attention to long-term earnings prospects and
the relationship of then-current prices to such prospects. Short-term trading is
not generally intended,  but occasional  investments may be made for the purpose
of seeking  short-term  or  medium-term  gain.  The Fund expects its  investment
objective to be met over long periods which may include  several  market cycles.
For  a  description  of  certain   investment   risks  associated  with  foreign
securities, see "Foreign Securities."

     For  temporary  defensive  purposes,  the World Fund may invest in the same
kinds of  securities  as the  other  Growth-Oriented  Funds  whether  issued  by
domestic  or  foreign  corporations,   governments,  or  governmental  agencies,
instrumentalities  or political  subdivisions and whether  denominated in United
States dollars or some other currency.

     The Fund  intends that its  investments  normally  will be allocated  among
various  countries.  Although there is no limitation on the percentage of assets
that may be invested in any one country or denominated in any one currency,  the
Fund intends under normal  market  conditions to have at least 65% of its assets
invested in securities issued by corporations of at least five countries, one of
which may be the United States.  Investments  may be made anywhere in the world,
but it is expected that primary  consideration will be given to investing in the
securities  issued  by  corporations  of  Western  Europe,   North  America  and
Australasia (Australia,  Japan and Far East Asia) that have developed economies.
Changes in investments may be made as prospects change for particular countries,
industries or companies.

     The Fund may invest in the securities of other investment companies but may
not  invest  more  than 10% of its  assets  in  securities  of other  investment
companies,  invest more than 5% of its total assets in the securities of any one
investment company, or acquire more than 3% of the outstanding voting securities
of any one investment company except in connection with a merger,  consolidation
or plan of  reorganization.  The Fund's Manager will waive its management fee on
the Fund's assets invested in securities of other open-end investment companies.
The Fund will  generally  invest only in those  investment  companies  that have
investment policies requiring investment in securities  comparable in quality to
those in which the Fund invests.

INCOME-ORIENTED FUNDS

     The Principal Funds currently  include two Funds which seek a high level of
income through investments in fixed-income  securities  (Principal Bond Fund and
Principal   Government   Securities  Fund)  collectively   referred  to  as  the
"Income-Oriented  Funds." An investment in either of the  Income-Oriented  Funds
involves market risks  associated  with movements in interest rates.  The market
value of the  Funds'  investments  will  fluctuate  in  response  to  changes in
interest rates and other factors.  During periods of falling interest rates, the
values  of  outstanding  long-term   fixed-income   securities  generally  rise.
Conversely,  during  periods  of  rising  interest  rates,  the  values  of such
securities  generally  decline.  Changes by recognized  rating agencies in their
ratings of any  fixed-income  security  and in the  ability of an issuer to make
payments  of  interest  and  principal  may  also  affect  the  value  of  these
investments. Changes in the value of portfolio securities will affect the Funds'
net asset  values but will not affect cash income  derived  from the  securities
unless a change results from a failure of an issuer to pay interest or principal
when due. Each Fund's rating  limitations  apply at the time of acquisition of a
security,  and any  subsequent  change in a rating by a rating  service will not
require  elimination of a security from the Fund's  portfolio.  The Statement of
Additional  Information  contains  descriptions of ratings of Moody's  Investors
Service, Inc. ("Moody's") and Standard and Poor's Corporation ("S&P").

Principal Bond Fund

     The  investment  objective of  Principal  Bond Fund is to provide as high a
level of income as is  consistent  with  preservation  of  capital  and  prudent
investment risk.

     In seeking to achieve the investment objective, the Fund will predominantly
invest in marketable fixed-income securities. Investments will be made generally
on a long-term basis, but the Fund may make short-term  investments from time to
time as deemed  prudent by the  Manager.  Longer  maturities  typically  provide
better yields but will subject the Fund to a greater  possibility of substantial
changes in the values of its portfolio securities as interest rates change.

     Under  normal  circumstances,  the Fund  will  invest  at least  65% of its
assets,  exclusive  of cash  items,  in one or more of the  following  kinds  of
securities:  (i) corporate debt  securities and taxable  municipal  obligations,
which at the time of purchase  have an  investment  grade rating within the four
highest grades used by Standard & Poor's  Corporation  (AAA, AA, A or BBB) or by
Moody's Investors Service,  Inc. (Aaa, Aa, A or Baa) or which, if lower-rated or
nonrated,  are comparable in quality in the opinion of the Fund's Manager;  (ii)
similar Canadian corporate, Provincial and Federal Government securities payable
in U.S. funds;  and (iii)  securities  issued or guaranteed by the United States
Government  or its  agencies  or  instrumentalities.  The  balance of the Fund's
assets may be invested in other fixed income securities,  including domestic and
foreign  corporate debt  securities or preferred  stocks,  in common stocks that
provide  returns  that  compare  favorably  with  the  yields  on  fixed  income
investments, and in common stocks acquired upon conversion of debt securities or
preferred  stocks or upon exercise of warrants  acquired with debt securities or
otherwise and foreign government  securities.  The debt securities and preferred
stocks in which the Fund invests may be convertible or nonconvertible.  The Fund
does not intend to purchase debt  securities  rated lower than Ba3 by Moody's or
BB - by S & P (bonds which are judged to have speculative elements; their future
cannot be considered as well-assured).  See "Below Investment-Grade Bonds" for a
discussion of the risks associated with these  securities.  The rating services'
descriptions of BBB or Baa securities are as follows: Moody's Investors Service,
Inc.  Bond Ratings -- Baa:  Bonds which are rated Baa are  considered  as medium
grade  obligations,  i.e., they are neither highly protected nor poorly secured.
Interest  payments and principal  security  appear  adequate for the present but
certain  protective  elements  may  be  lacking  or  may  be  characteristically
unreliable over any great length of time. Such bonds lack outstanding investment
characteristics and in fact have speculative characteristics as well. Standard &
Poor's  Corporation  Bond Ratings -- 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  for  debt in  higher-rated
categories.

     During the year ended  December  31,  1996,  the  percentage  of the Fund's
portfolio  securities  invested in the various  ratings  established  by Moody's
based upon the weighted average ratings of the portfolio, was as follows:

      Moody's Rating                           Portfolio Percentage
           Aaa                                          .18%
           Aa                                           .81%
           A                                          24.05%
           Baa                                        68.04%
           Ba                                          6.92%

     * The above percentages for A rated securities  include .57%  respectively,
unrated securities which have been determined by the Manager to be of comparable
quality.

     Cash  equivalents in which the Fund invests  include  corporate  commercial
paper  rated  A-1+,  A-1 or A-2 by  Standard & Poor's or P-1 or P-2 by  Moody's,
unrated commercial paper issued by corporations with outstanding debt securities
rated in the four  highest  grades by  Standard  & Poor's and  Moody's  and bank
certificates  of  deposit  and  bankers'  acceptances  issued or  guaranteed  by
national or state banks and repurchase agreements considered by the Fund to have
investment quality.  Under unusual market or economic  conditions,  the Fund may
for temporary  defense  purposes invest up to 100% of its assets in cash or cash
equivalents.

Principal Government Securities Fund

     The objective of Principal  Government  Securities  Fund is a high level of
current income, liquidity and safety of principal.

     The Fund will  invest in  obligations  issued or  guaranteed  by the United
States  Government  or by its agencies or  instrumentalities  and in  repurchase
agreements   collateralized  by  such  obligations.   Such  securities   include
Government National Mortgage Association  ("GNMA")  Certificates of the modified
pass-through type, Federal National Mortgage Association  ("FNMA")  Obligations,
Federal Home Loan Mortgage Corporation  ("FHLMC")  Certificates and Student Loan
Marketing   Association   ("SLMA")   Certificates  and  other  U.S.   Government
Securities.  GNMA is a  wholly-owned  corporate  instrumentality  of the  United
States whose  securities  and guarantees are backed by the full faith and credit
of  the  United  States.   FNMA,  a  federally   chartered  and  privately-owned
corporation,  FHLMC,  a federal  corporation,  and SLMA, a government  sponsored
stockholder-owned  organization, are instrumentalities of the United States. The
securities  and guarantees of FNMA,  FHLMC and SLMA are not backed,  directly or
indirectly,  by the full  faith and credit of the United  States.  Although  the
Secretary of the Treasury of the United  States has  discretionary  authority to
lend FNMA up to $2.25 billion outstanding at any time, neither the United States
nor any agency thereof is obligated to finance  FNMA's or FHLMC's  operations or
to assist FNMA or FHLMC in any other  manner.  The Fund may maintain  reasonable
amounts of cash or short-term debt securities for daily cash management purposes
or pending selection of particular long-term investments.

     Depending on market conditions,  up to 55% of the assets may be invested in
GNMA  Certificates.  GNMA is a United States Government  corporation  within the
Department   of  Housing   and  Urban   Development.   GNMA   Certificates   are
mortgage-backed securities representing an interest in a pool of mortgage loans.
Such loans are made by lenders such as mortgage  bankers,  insurance  companies,
commercial  banks and  savings  and loan  associations.  Then,  they are  either
insured by the Federal  Housing  Administration  (FHA) or they are guaranteed by
the Veterans  Administration  (VA) or Farmers Home  Administration  (FmHA).  The
lender or other  prospective  issuer creates a specific pool of such  mortgages,
which it submits to GNMA for approval.  After  approval,  a GNMA  Certificate is
typically offered by the issuer to investors through securities dealers.

     GNMA  Certificates  differ from bonds in that the principal is scheduled to
be paid back by the borrower on a monthly basis over the life of the loan rather
than  returned  in  a  lump  sum  at  maturity.   Modified   pass-through   GNMA
certificates,  which  are the only  kind in which the Fund  intends  to  invest,
entitle the holder to receive all interest and  principal  payments  owed on the
mortgages  in the pool  (net of the  issuer  and GNMA fee of .5%  prescribed  by
regulation),  regardless  of whether or not the mortgagor has made such payment.
The timely payment of interest and principal is guaranteed by the full faith and
credit of the United States Government.

     Although the payment of interest and principal is guaranteed, the guarantee
does not extend to the value of a GNMA Certificate or the value of the shares of
the Fund.  The market value of a GNMA  Certificate  typically  will fluctuate to
reflect  changes in prevailing  interest rates. It falls when rates increase (as
does the market value of other debt  securities) and it rises when rates decline
(but it may not rise on a comparable basis with other debt securities because of
its  prepayment  feature),  and,  therefore,  may be more or less  than the face
amount of the GNMA Certificate, which reflects the aggregate principal amount of
the underlying  mortgages.  As a result, the net asset value of Fund shares will
fluctuate as interest rates change.

     Mortgagors may pay off their mortgages at any time. Expected prepayments of
the  mortgages can affect the market value of the GNMA  Certificate,  and actual
prepayments  can  affect  the  return  ultimately  received.  Prepayments,  like
scheduled  payments  of  principal,  are  reinvested  by the Fund at  prevailing
interest  rates  which  may be  less  than  the  rate on the  GNMA  Certificate.
Prepayments  are likely to increase as the interest rate for new mortgages moves
lower than the rate on the GNMA Certificate.  Moreover,  if the GNMA Certificate
had been  purchased  at a premium  above  principal  because  its rate  exceeded
prevailing  rates,  the premium is not  guaranteed and a decline in value to par
may result in a loss of the premium especially in the event of prepayment.

     To the extent deemed appropriate by the Fund's Manager, the Fund intends to
purchase GNMA Certificates directly from Principal Mutual Life Insurance Company
and other  issuers as well as from  securities  dealers.  The Fund will purchase
directly from issuers only if it can obtain a price  advantage by not paying the
commission or mark-up that would be required if the Certificates  were purchased
from a securities dealer.  The Securities and Exchange  Commission has issued an
order under the Investment Company Act of 1940 that permits the Fund to purchase
GNMA Certificates  directly from Principal Mutual Life Insurance Company subject
to certain conditions.

     The FNMA and FHLMC securities in which the Fund invests are very similar to
GNMA  certificates  as described  above but are not guaranteed by the full faith
and credit of the United States but rather by the agency itself.  FNMA and FHLMC
securities are rated Aaa by Moody's and AAA by Standard & Poor's.  These ratings
reflect  the  status  of FNMA  and  FHLMC  as  federal  agencies  as well as the
important role each plays in financing purchases of homes in the U.S.

     Student   Loan   Marketing    Association   is   a   government   sponsored
stockholder-owned  organization  whose goal is to provide liquidity to financial
and  educational  institutions.  SLMA provides  liquidity by purchasing  student
loans,  which are  principally  government  guaranteed  loans  issued  under the
Federal Guaranteed Student Loan Program and the Health Education Assistance Loan
Program.  SLMA  securities  are not  guaranteed by the U.S.  Government  but are
obligations  solely of the  agency.  SLMA  senior  debt issues in which the Fund
invests are rated AAA by Standard & Poor's and Aaa by Moody's.

     There are other  obligations  issued or  guaranteed  by the  United  States
Government   (such  as  U.S.   Treasury   securities)  or  by  its  agencies  or
instrumentalities  that are either supported by the full faith and credit of the
U.S. Treasury or the credit of a particular agency or instrumentality.  Included
in the  latter  category  are  Federal  Home  Loan Bank and Farm  Credit  Banks.
Obligations  not  guaranteed  by the United States  Government  are highly rated
because they are issued by indirect branches of government. Such paper is issued
as needs arise by the agency and is traded regularly in denominations similar to
those in which government obligations are traded.

     The Fund will not engage in the  trading of  securities  for the purpose of
realizing  short-term  profits,  but it will adjust its  portfolio as considered
advisable in view of prevailing or anticipated  market conditions and the Fund's
investment  objective.  Accordingly,  the Fund may sell portfolio  securities in
anticipation  of a rise in interest rates and purchase  securities for inclusion
in its portfolio in anticipation of a decline in interest rates.

     As a hedge  against  changes  in  interest  rates,  the Fund may enter into
contracts with dealers in GNMA Certificates  whereby the Fund agrees to purchase
or sell an  agreed-upon  principal  amount of GNMA  Certificates  at a specified
price on a certain  date.  The Fund may enter into similar  purchase  agreements
with issuers of GNMA  Certificates  other than  Principal  Mutual Life Insurance
Company.  The Fund may also purchase optional delivery standby commitments which
give the Fund the right to sell  particular  GNMA  Certificates  at a  specified
price on a  specified  date.  Failure of the other  party to such a contract  or
commitment  to abide by the terms thereof could result in a loss to the Fund. To
the extent the Fund engages in delayed  delivery  transactions it will do so for
the purpose of acquiring  portfolio  securities  consistent  with its investment
objective  and  policies  and not for the purpose of  investment  leverage or to
speculate on interest rate changes. Liability accrues to the Fund at the time it
becomes  obligated to purchase such  securities,  although  delivery and payment
occur at a later  date.  From the time the Fund  becomes  obligated  to purchase
securities  on a delayed  delivery  basis the Fund has all the  rights and risks
attendant  to the  ownership  of a security.  At the time the Fund enters into a
binding  obligation to purchase such securities,  Fund assets of a dollar amount
sufficient  to  make  payment  for  the  securities  to  be  purchased  will  be
segregated. The availability of liquid assets for this purpose and the effect of
asset  segregation  on the Fund's  ability to meet its current  obligations,  to
honor  requests for  redemption  and to have its  investment  portfolio  managed
properly  will  limit  the  extent  to  which  the Fund may  engage  in  forward
commitment  agreements.  Except as may be imposed by these factors,  there is no
limit on the  percent  of the  Fund's  total  assets  that may be  committed  to
transactions in such agreements.

MONEY MARKET FUND

     The  Principal  Funds  also  include  a Fund  which  invests  primarily  in
short-term  securities,  Principal  Money Market Fund.  Securities  in which the
Money Market Fund will invest may not yield as high a level of current income as
securities  of low  quality  and longer  maturities  which  generally  have less
liquidity, greater market risk and more fluctuation.

     The Money Market Fund will limit its portfolio investments to United States
dollar  denominated  instruments that its board of directors  determines present
minimal  credit  risks  and  which  are at the  time  of  acquisition  "Eligible
Securities" as that term is defined in  regulations  issued under the Investment
Company Act of 1940. Eligible Securities include:

     (1)  A security  with the  remaining  maturity  of 397 days or less that is
          rated (or that has been  issued by an issuer  that is rated in respect
          to a class of short-term debt obligations, or any security within that
          class,  that is comparable in priority and security with the security)
          by a nationally  recognized  statistical rating organization in one of
          the two highest rating categories for short-term debt obligations; or

     (2)  A security at the time of issuance was a long-term security that has a
          remaining  maturity of 397 calendar days or less, and whose issuer has
          received from a nationally recognized  statistical rating organization
          a rating,  with respect to a class of short-term debt  obligations (or
          any security within that class) that is now comparable in priority and
          security  with  the  security,  in  one  of  the  two  highest  rating
          categories for short-term debt obligations; or

     (3)  An  unrated  security  that is of  comparable  quality  to a  security
          meeting the  requirements  of (1) or (2) above,  as  determined by the
          board of directors.

     The Fund will not invest more than 5% of its total assets in the  following
securities:

     (1)  Securities  which, when acquired by the Fund (either initially or upon
          any subsequent rollover),  are rated below the highest rating category
          for short-term debt obligations;

     (2)  Securities  which,  at the time of issuance were long-term  securities
          but  when  acquired  by the  Fund  have a  remaining  maturity  of 397
          calendar days or less, if the issuer of such securities is rated, with
          respect to a class of comparable  short-term debt  obligations,  below
          the highest rating category for short-term obligations;

     (3)  Securities which are unrated but are determined by the Fund's board of
          directors to be of comparable  quality to  securities  rated below the
          highest rating category for short-term debt obligations. The Fund will
          maintain a dollar-weighted  average  portfolio  maturity of 90 days or
          less.

     The objective of Principal  Money Market Fund is to seek as high a level of
current income available from short-term  securities as is considered consistent
with  preservation  of principal and  maintenance  of liquidity by investing its
assets  in  a  portfolio  of  money  market  instruments.   These  money  market
instruments are U.S. Government  Securities,  U.S. Government Agency Securities,
Bank  Obligations,  Commercial Paper,  Short-term  Corporate Debt and Repurchase
Agreements,  which  are  described  briefly  below  and in  more  detail  in the
Statement of Additional Information.

     U.S. Government  Securities are securities issued or guaranteed by the U.S.
Government, including treasury bills, notes and bonds.

     U.S.  Government Agency Securities are obligations  issued or guaranteed by
agencies or  instrumentalities  of the U.S.  Government whether supported by the
full faith and credit of the U.S. Treasury or only by the credit of a particular
agency or instrumentality.

     Bank  Obligations  consist of  certificates  of deposit which are generally
negotiable  certificates issued against funds deposited in a commercial bank for
a definite period of time and earning a specified return and bankers acceptances
which are time  drafts  drawn on a  commercial  bank by a  borrower,  usually in
connection with international commercial transactions.

     Commercial  Paper is  short-term  promissory  notes issued by  corporations
primarily to finance short-term credit needs.

     Short-term  Corporate Debt consists of notes,  bonds or debentures which at
the time of purchase have one year or less remaining to maturity.

     Repurchase Agreements are transactions under which securities are purchased
from a bank or  securities  dealer with an agreement by the seller to repurchase
the securities at the same price plus interest at a specified  rate.  Generally,
Repurchase  Agreements  are of short  duration,  usually less than a week but on
occasion for longer periods.

     The  Fund  intends  to hold  its  investments  until  maturity,  but may on
occasion trade securities to take advantage of market variations.  Also, revised
valuations  of an  issuer  or  redemptions  may  result  in sales  of  portfolio
investments prior to maturity or at times when such sales might otherwise not be
desirable.  The Fund's right to borrow to facilitate  redemptions may reduce the
need for  such  sales.  It is the  Fund's  policy  to be as  fully  invested  as
reasonably practical at all times to maximize current income.

     Since portfolio assets will consist of short-term instruments,  replacement
of portfolio securities will occur frequently.  However,  since the Fund expects
to usually transact purchases and sales of portfolio  securities with issuers or
dealers  on a net  basis,  it is not  anticipated  that  the  Fund  will pay any
significant  brokerage  commissions.  The Fund is free to dispose  of  portfolio
securities at any time, when changes in  circumstances or conditions make such a
move desirable in light of the investment objective.

     A  shareholder's  rate of return will vary with the general  interest  rate
levels applicable to the money market instruments in which the Fund invests. The
rate of return and the net asset value will be affected by such other factors as
sales  of  portfolio  securities  prior to  maturity  and the  Fund's  operating
expenses.

CERTAIN INVESTMENT POLICIES AND RESTRICTIONS

     Following is a discussion of certain  investment  practices  that the Funds
may use in an effort to achieve their respective investment objectives.

Diversification

     Each Fund is subject to the diversification  requirements of Section 817(h)
of the Internal  Revenue Code (the "Code")  which must be met at the end of each
quarter of the year (or within 30 days  thereafter).  Regulations  issued by the
Secretary  of the Treasury  have the effect of requiring  each Fund to invest no
more than 55% of its total assets in securities of any one issuer,  no more than
70% in the securities of any two issuers,  no more than 80% in the securities of
any three  issuers,  and no more than 90% in the securities of any four issuers.
For this purpose, the United States Treasury and each U.S. Government agency and
instrumentality  is considered to be a separate  issuer.  Thus,  the  Government
Securities Fund intends to invest in U.S. Treasury  securities and in securities
issued by at least four U.S.  Government  agencies or  instrumentalities  in the
amounts necessary to meet those diversification  requirements at the end of each
quarter of the year (or within thirty days thereafter).

     In the event any of the Funds do not meet the diversification  requirements
of Section 817(h) of the Code, the contracts  funded by shares of the Funds will
not be treated as annuities or life  insurance  for Federal  income tax purposes
and the owners of the Funds will be subject to  taxation  on their  share of the
dividends and distributions paid by the Funds.

Foreign Securities

     Each of the following  Principal Funds has adopted investment  restrictions
that limit its investments in foreign securities to the indicated  percentage of
its assets:  Asset Allocation and World Funds - 100%;  Aggressive  Growth Fund -
25%; Bond,  Capital  Accumulation - 20%;  Balanced,  Emerging  Growth and Growth
Funds - 10%.  Investment in foreign securities  presents certain risks including
those  resulting from  fluctuations in currency  exchange rates,  revaluation of
currencies,  the  imposition  of foreign  taxes,  future  political and economic
developments  including  war,  expropriations,   nationalization,  the  possible
imposition of currency exchange controls and other foreign  governmental laws or
restrictions, reduced availability of public information concerning issuers, and
the fact that foreign issuers are not generally  subject to uniform  accounting,
auditing and financial reporting standards or to other regulatory  practices and
requirements  comparable  to those  applicable  to domestic  issuers.  Moreover,
securities  of many  foreign  issuers may be less  liquid and their  prices more
volatile than those of comparable domestic issuers. In addition, transactions in
foreign  securities may be subject to higher costs,  and the time for settlement
of transactions in foreign  securities may be longer than the settlement  period
for domestic issuers.  A Fund's investment in foreign securities may also result
in higher custodial costs and the costs associated with currency conversions.

Currency Contracts

     The Aggressive Growth, Asset Allocation and World Funds may each enter into
forward currency  contracts,  currency futures contracts and options thereon and
options on currencies for hedging and other non-speculative  purposes. A forward
currency contract involves a privately negotiated obligation to purchase or sell
a specific currency at a future date at a price set at the time of the contract.
The Funds will not enter into a  transaction  to hedge  currency  exposure to an
extent greater in effect than the aggregate  market value of the securities held
or to be purchased by the Fund that are  denominated  or generally  quoted in or
currently convertible into the currency. When the Fund enters into a contract to
buy or sell a  foreign  currency,  it  generally  will  hold an  amount  of that
currency,  liquid securities  denominated in that currency or a forward contract
for such securities equal to the Fund's obligation,  or it will segregate liquid
high grade debt obligations equal to the amount of the Fund's  obligations.  The
use of currency  contracts  involves many of the same risks as  transactions  in
futures  contracts and options as well as the risk of government  action through
exchange  controls or otherwise  that would  restrict the ability of the Fund to
deliver or receive currency.

Repurchase Agreements and Securities Loans

     Each of the Funds,  except the Capital  Accumulation  Fund,  may enter into
repurchase   agreements  with,  and  each  of  the  Funds,  except  the  Capital
Accumulation  and Money Market  Funds,  may lend its  portfolio  securities  to,
unaffiliated   broker-dealers   and  other  unaffiliated   qualified   financial
institutions.  These transactions must be fully collateralized at all times, but
involve  some credit risk to the Fund if the other party  should  default on its
obligations,  and the  Fund is  delayed  or  prevented  from  recovering  on the
collateral.  See the Funds'  Statement  of  Additional  Information  for further
information regarding the credit risks associated with repurchase agreements and
the  standards  adopted by each  Fund's  Board of  Directors  to deal with those
risks.  None of the Funds intend either (i) to enter into repurchase  agreements
that mature in more than seven days if any such  investment,  together  with any
other illiquid securities held by the Fund, would amount to more than 10% of its
total assets or (ii) to loan securities in excess of 30% of its total assets.

Forward Commitments

     From time to time,  each of the Funds may  enter  into  forward  commitment
agreements  which call for the Fund to  purchase  or sell a security on a future
date and at a price fixed at the time the Fund enters into the  agreement.  Each
of the Funds may also acquire  rights to sell its  investments to other parties,
either on demand or at specific intervals.

Warrants

     Each of the Funds, except the Money Market and Government Securities Funds,
may invest in warrants up to 5% of its assets,  of which not more than 2% may be
invested  in  warrants  that are not  listed on the New York or  American  Stock
Exchange.  For the World Fund, the 2% limitation also does not apply to warrants
listed on the Toronto Stock Exchange or the Chicago Board Options Exchange.

Borrowing

     As a matter of  fundamental  policy,  each Fund may  borrow  money only for
temporary  or  emergency  purposes.   The  Balanced  Fund,  Bond  Fund,  Capital
Accumulation  Fund and Money  Market Fund may borrow  only from banks.  Further,
each may borrow only in an amount not  exceeding  5% of its  assets,  except the
Capital  Accumulation  Fund which may borrow only in an amount not exceeding the
lesser of (i) 5% of the value of its  assets  less  liabilities  other than such
borrowings, or (ii) 10% of its assets taken at cost at the time the borrowing is
made, and the Money Market Fund which may borrow only in an amount not exceeding
the lesser of (i) 5% of the value of its assets, or (ii) 10% of the value of its
net assets taken at cost at the time the borrowing is made.

Options

     The Aggressive  Growth Fund,  Asset  Allocation  Fund,  Balanced Fund, Bond
Fund,  Emerging Growth Fund,  Government  Securities Fund, Growth Fund and World
Fund may purchase covered spread options, which would give the Fund the right to
sell a  security  that it owns at a fixed  dollar  spread  or  yield  spread  in
relationship  to another  security that the Fund does not own, but which is used
as a benchmark.  These same Funds may also purchase and sell  financial  futures
contracts,  options on financial futures contracts and options on securities and
securities  indices,  but will not  invest  more than 5% of their  assets in the
purchase of options on  securities,  securities  indices and  financial  futures
contracts or in initial margin and premiums on financial  futures  contracts and
options  thereon.  The Funds may write  options  on  securities  and  securities
indices to generate  additional  revenue and for hedging  purposes and may enter
into  transactions in financial futures contracts and options on those contracts
for hedging purposes.

Below Investment Grade Bonds

     Below  investment-grade  bonds are securities rated Ba1 or lower by Moody's
Investors  Service,  Inc.  ("Moody's")  or BB+ or  lower  by  Standard  & Poor's
Corporation   ("S&P")  or  unrated   securities  which  the  Fund's  Manager  or
Sub-Advisor  believes are of comparable quality.  These securities are regarded,
on balance,  as predominantly  speculative with respect to the issuer's capacity
to pay  interest  and to repay  principal  in  accordance  with the terms of the
obligation. The Funds, except the Asset Allocation Fund, do not intend to invest
in securities rated lower than Ba3 by Moody's or BB by S&P. The Asset Allocation
Fund does not intend to invest in  securities  rated  below Caa by  Moody's  and
below CCC by S&P. The Asset  Allocation  Fund normally will not invest more than
20% of its assets in below  investment grade  securities.  The Bond Fund may not
invest more than 35% of its assets in such  securities.  The Balanced  Fund does
not intend to invest more than 5% of its assets in such securities.

     The rating  services'  descriptions of below  investment  grade  securities
rating categories in which the Funds may normally invest are as follows:

     Moody's Investors Service, Inc. Bond Ratings - Ba: Bonds which are rated Ba
are judged to have  speculative  elements;  their future cannot be considered as
well-assured.  Often the  protection of interest and  principal  payments may be
very  moderate and thereby not well  safeguarded  during both good and bad times
over the future.  Uncertainty of position  characterizes bonds in this class. B:
Bonds  which  are  rated  B  generally  lack  characteristics  of the  desirable
investment.  Assurance of interest and principal  payments or of  maintenance of
other  terms of the  contract  over any long  period of time may be small.  Caa:
Bonds which are rated Caa are of poor standing. Such issues may be in default or
there may be present elements of danger with respect to principal or interest.

     Moody's may apply  numerical  modifiers,  1, 2 and 3 in each generic rating
classification  from Aa  through B in its bond  rating  system.  The  modifier 1
indicates  that  the  security  ranks  in the  high  end of its  generic  rating
category;  the  modifier  2  indicates  a  mid-range  ranking;  and a modifier 3
indicates that the issue ranks in the lower end of its generic rating category.

     Standard & Poor's  Corporation  Bond  Ratings - BB, B, CCC,  CC: Debt rated
"BB", "B", "CCC" and "CC" is regarded, on balance, as predominantly  speculative
with respect to capacity to pay interest and repay  principal in accordance with
the terms of the obligation. "BB" indicates the lowest degree of speculation and
"CC" the highest  degree of  speculation.  While such debt will likely have some
quality  and   protective   characteristics,   these  are  outweighed  by  large
uncertainties or major risk exposures to adverse conditions.

     Plus (+) or Minus (-): The "BB" rating may be modified by the addition of a
plus or minus sign to show relative standing within the major rating categories.

     Below investment-grade  securities present special risks to investors.  The
market  value  of  lower-rated  securities  may be more  volatile  than  that of
higher-rated  securities and generally tends to reflect the market's  perception
of the  creditworthiness  of the issuer and short-term market  developments to a
greater  extent than more  highly  rated  securities,  which  reflect  primarily
fluctuations  in  general  levels  of  interest   rates.   Periods  of  economic
uncertainty and change can be expected to result in increased  volatility in the
market value of lower-rated securities.  Further, such securities may be subject
to greater risks of loss of income and principal,  particularly  in the event of
adverse  economic  changes or increased  interest  rates,  because their issuers
generally  are not as  financially  secure  or as  creditworthy  as  issuers  of
higher-rated  securities.  Additionally,  to  the  extent  that  there  is not a
national market system for secondary  trading of lower-rated  securities,  there
may be a low  volume  of  trading  in such  securities  which  may  make it more
difficult  to value  or sell  those  securities  than  higher-rated  securities.
Adverse publicity and investor perceptions,  whether or not based on fundamental
analysis,  may  decrease  the values  and  liquidity  of high yield  securities,
especially in a thinly traded market.

     Investors  should  recognize  that the  market  for below  investment-grade
securities  is a relatively  recent  development  that has not been tested by an
economic  recession.  An economic  downturn may severely  disrupt the market for
such  securities and cause  financial  stress to the issuers which may adversely
affect  the value of the  securities  held by the Funds and the  ability  of the
issuers of the  securities  held by the Funds to pay principal  and interest.  A
default by an issuer may result in a Fund incurring  additional expenses to seek
recovery of the amounts due it.

     Some  of the  securities  in  which  the  Funds  invest  may  contain  call
provisions.  If the issuer of such a security  exercises a call  provision  in a
declining interest rate market, the Fund would have to replace the security with
a  lower-yielding  security,  resulting  in a  decreased  return for  investors.
Further,  a higher-yielding  security's value will decrease in a rising interest
rate market, which will be reflected in the Fund's net asset value per share.

     Congress recently enacted legislation requiring  federally-insured  savings
and  loan  associations  to  divest  themselves  of  investments  in high  yield
securities.  This legislation might increase the supply of securities  available
for purchase in the secondary  market and,  potentially,  lower the value of the
securities held by the Funds.

     The  Statement  of  Additional  Information  includes  further  information
concerning   the  Funds'   investment   policies   and   applicable   investment
restrictions.   Each  Fund's   investment   objective  and  certain   investment
restrictions  designated  as  such  in  this  Prospectus  or  the  Statement  of
Additional  Information are fundamental policies that may not be changed without
shareholder approval.  All other investment policies described in the Prospectus
and the Statement of Additional  Information  for a Fund are not fundamental and
may be  changed  by the  Board  of  Directors  of the Fund  without  shareholder
approval.

MANAGER AND SUB-ADVISORS

     The  Manager  for  the  Funds  is  Princor   Management   Corporation  (the
"Manager"),  an  indirectly  wholly-owned  subsidiary  of Principal  Mutual Life
Insurance  Company,  a mutual life insurance company organized in 1879 under the
laws of the State of Iowa. The address of the Manager is The Principal Financial
Group,  Des Moines,  Iowa 50392.  The Manager was organized on January 10, 1969,
and since that time has managed  various  mutual  funds  sponsored  by Principal
Mutual Life  Insurance  Company.  As of December 31, 1996, the Manager served as
investment  advisor for 26 such funds with assets  totaling  approximately  $4.0
billion.

     The Manager has executed an agreement with Invista Capital Management, Inc.
("Invista")  under  which  Invista has agreed to assume the  obligations  of the
Manager to provide  investment  advisory  services for the Balanced Fund, Growth
Fund  and  World  Fund.  The  Manager  will  reimburse  Invista  for the cost of
providing  these services.  Invista,  an indirectly  wholly-owned  subsidiary of
Principal  Mutual Life  Insurance  company and an affiliate of the Manager,  was
founded in 1985 and manages investments for institutional  investors,  including
Principal  Mutual  Life.  Assets  under  management  at  December  31, 1996 were
approximately  $19.6 billion.  Invista's  address is 1500 Hub Tower, 699 Walnut,
Des Moines, Iowa 50309.

     The  Manager has also  executed an  agreement  with  Morgan  Stanley  Asset
Management  Inc.  ("MSAM") under which MSAM has agreed to assume the obligations
of the Manager to provide investment advisory services for the Aggressive Growth
Fund and Asset  Allocation Fund. The Manager pays MSAM a fee for such investment
advisory services.  MSAM, with principal offices at 1221 Avenue of the Americas,
New York, NY 10020,  provides a broad range of portfolio  management services to
customers in the United  States and abroad.  At December 31, 1996,  MSAM managed
investments totaling approximately $72.6 billion,  including approximately $54.9
billion  under  active  management  and  $17.7  billion  as Named  Fiduciary  or
Fiduciary Adviser.

     The Manager,  Invista, or MSAM has assigned certain individuals the primary
responsibility  for the  day-to-day  management  of each Fund's  portfolio.  The
persons  primarily  responsible  for the day-to-day  management of each Fund are
identified in the table below:

<TABLE>
<CAPTION>
                                 Primarily
         Fund                Responsible Since                                Person Primarily Responsible
___________________         ____________________       ____________________________________________________________________________
<S>                         <C>                        <C>                                                                
Aggressive Growth           May, 1994                  Kurt Feuerman (MBA degree, Columbia University; M.A. degree, Syracuse
                              (Fund's inception)       University).  Managing  Director,  Morgan Stanley Asset Management Inc. 
                                                       and Morgan Stanley & Co. Incorporated.
                                                       
Asset Allocation            May, 1994                  Francine J. Bovich (MBA degree, New York University). Principal, Morgan
                              (Fund's inception)       Stanley Asset Management Inc. and Morgan Stanley & Co. Incorporated.
                                                       
                            May, 1994                  Kurt Feuerman (MBA degree, Columbia University; M.A. degree, Syracuse
                              (Fund's inception)       University).  Managing  Director,  Morgan Stanley Asset Management Inc. 
                                                       and Morgan Stanley & Co. Incorporated.
                                                       
                            April, 1996                Stephen  C.  Sexauer  (MBA  degree,  University  of  Chicago).  Principal,  
                                                       Morgan Stanley Asset Management Inc. and Morgan Stanley & Co. Incorporated.
                                                       
Balanced                    April, 1993                Judith A. Vogel, CFA (BA degree, Central College). Vice President, Invista
                                                       Capital Management, Inc.
                                                       
Bond                        November, 1996             Scott A. Bennett, CFA (MBA degree, University of Iowa) Assistant Director
                                                       Investment Securities, Principal Mutual Life Insurance Company.
                                                       
Capital Accumulation        November, 1969             David L. White,  CFA (BBA  degree, University of Iowa).  Executive Vice
                              (Fund's inception)       President,  Invista Capital  Management,  Inc.;  Co-Manager since November, 
                                                       1996: Catherine  A.  Green,  CFA,  (MBA  degree,  Drake  University).   
                                                       Vice  President, Invista Capital Management, Inc.
                                                       
Emerging Growth             December, 1987             Michael R. Hamilton, (BMBA degree, Bellarmine College). Vice President,
and Growth                    (Fund's inception)       Invista Capital Management, Inc.
                              and May, 1994 (Fund's    
                              inception), respectively 
                                                       
Government Securities       April, 1987                Martin J. Schafer (BBA degree, University of Iowa). Vice President, Invista
                              (Fund's inception)       Capital Management, Inc.
                                                       
World                       April, 1994                Scott  D.  Opsal,  CFA (MBA  degree,  University  of  Minnesota).  Executive
                                                       Vice President, Invista Capital Management, Inc.
</TABLE>

DUTIES PERFORMED BY THE MANAGER AND SUB-ADVISORS

     Under  Maryland  law,  the  business  and  affairs of each of the Funds are
managed under the direction of its Board of Directors.  The investment  services
and certain  other  services  referred to under the heading  "Cost of  Manager's
Services" in the Statement of Additional  Information are furnished to the Funds
under  the terms of a  Management  Agreement  between  each of the Funds and the
Manager and, for some of the Funds, a Sub-Advisory Agreement between the Manager
and Invista or the Manager and MSAM. The Manager,  Invista, or MSAM, advises the
Funds on investment policies and on the composition of the Funds' portfolios. In
this  connection,  the  Manager,  or  Sub-Advisor,  furnishes  to the  Board  of
Directors of each Fund a recommended  investment  program  consistent  with that
Fund's  investment  objective  and policies.  The Manager,  or  Sub-Advisor,  is
authorized,  within the scope of the approved  investment  program, to determine
which securities are to be bought or sold, and in what amounts.

     The compensation paid by each Fund to the Manager for the fiscal year ended
December 31, 1996 was, on an annual basis, equal to the following  percentage of
average net assets:

                                                                Total
                                         Manager's           Annualized
              Fund                          Fee               Expenses
- ----------------------------------------------------------------------
 Aggressive Growth Fund                   .80%                  .85%
 Asset Allocation Fund                    .80%                  .87%
 Balanced Fund                            .60%                  .63%
 Bond Fund                                .50%                  .53%
 Capital Accumulation Fund                .48%                  .49%
 Emerging Growth Fund                     .64%                  .66%
 Government Securities Fund               .50%                  .52%
 Growth Fund                              .50%                  .52%
 Money Market Fund                        .50%                  .56%
 World Fund                               .75%                  .90%

     The compensation being paid by the Aggressive Growth Fund, Asset Allocation
Fund and World Fund for investment  management services is higher than that paid
by most funds to their advisor,  but it is not higher than the fees paid by many
funds with similar investment objectives and policies.

     The Manager and Sub-Advisors may purchase at their own expense  statistical
and other  information  or services from outside  sources,  including  Principal
Mutual Life  Insurance  Company.  An Investment  Service  Agreement  between the
Manager,  Principal  Mutual Life  Insurance  Company  and each Fund,  except the
Aggressive Growth Fund and Asset Allocation Fund, provides that Principal Mutual
Life Insurance Company will furnish certain  personnel,  services and facilities
required by the Manager in connection  with its  performance  of the  Management
Agreements,  and that the Manager will reimburse Principal Mutual Life Insurance
Company for its costs incurred in this regard. The Investment Service Agreements
for the Capital  Accumulation,  Emerging Growth and Government  Securities Funds
also  include  as a  party  Invista  Capital  Management,  Inc.,  an  indirectly
wholly-owned  subsidiary of Principal  Mutual Life Insurance  Company,  and also
provide that the  subsidiaries of Principal  Mutual Life Insurance  Company will
furnish the same items and be reimbursed by the Manager for their costs incurred
in this regard.

     The  Funds  may  from  time  to time  execute  transactions  for  portfolio
securities with, and pay related brokerage  commissions to, Principal  Financial
Securities,  Inc., a  broker-dealer  that is an affiliate of the Distributor and
Manager  for each of the  Funds.  The Fund may  also  execute  transactions  for
portfolio securities through Morgan Stanley & Co. Incorporated,  an affiliate of
Morgan Stanley Asset Management Inc.

     The Manager serves as investment  advisor,  dividend  disbursing agent and,
directly  and  through an  affiliate,  as  transfer  agent for each of the Funds
sponsored by Principal Mutual Life Insurance Company.

MANAGERS' COMMENTS

     Princor  Management   Corporation,   Invista  and  MSAM  are  staffed  with
investment  professionals  who manage each  individual  fund.  Comments by these
individuals  in the following  paragraphs  summarize in capsule form the general
strategy and recent  results of each fund over the past year.  The  accompanying
charts display results for the past 10 years or the life of the fund,  whichever
is shorter.  Average Annual Total Return  figures  provided for each fund in the
graphs below reflect all expenses of the fund and assume all  distributions  are
reinvested  at net asset  value.  The  figures do not  reflect  expenses  of the
variable life insurance  contracts or variable  annuity  contracts that purchase
fund shares;  performance  figures for the divisions of the  contracts  would be
lower than  performance  figures  for the funds due to the  additional  contract
expenses. Past performance is not predictive of future performance.  Returns and
net asset values  fluctuate.  Shares are  redeemable at current net asset value,
which may be more or less than original cost.

     The various indices  included in the following  graphs are unmanaged and do
not  reflect  any  commissions  or fees which  would be  incurred by an investor
purchasing  the  securities  included  in the  index.  Investors  cannot  invest
directly into these or any indices.

Growth-Oriented Funds

Principal Aggressive Growth Fund
(Kurt Feuerman)

     Since it first became  available on June 1, 1994, the Principal  Aggressive
Growth Fund has generated an  annualized  return of 28.05% versus 23.63% for the
S&P 500 and 19.18% for the Lipper Growth Fund Average. In 1996 the Fund returned
28.05%  versus  22.96% for the S&P 500 and 19.24%  for the  Lipper  Growth  Fund
Average.

     For the third consecutive year, substantial  overweighting of the portfolio
in the tobacco sector contributed  positively to relative  performance.  After a
market-smashing total return of 62% in 1995 (including dividends), Philip Morris
stock surged late in 1996 for a full-year total return of 25%. Philip Morris was
the largest single holding in the portfolio throughout most of 1995 and 1996.

     At year-end 1996,  Philip Morris stock at $113 represented  about 5% of the
Fund's portfolio. Philip Morris as well as other positions in RJR Nabisco, Loews
and  Consolidated  Cigar as a group will  clearly be subject to bouts of selling
pressure  since  the  industry  is under  attack  from a number  of  directions.
However,  tobacco  stocks  are in the  midst of a  multi-year  trend  of  upward
revaluation. Combined with strong underlying growth fundamentals, this creates a
powerful investment opportunity which many investors are missing.

     Entering into 1997, the S&P 500 Index has outperformed the vast majority of
active managers for three  consecutive  years.  Also, the Index has outpaced the
earnings growth of the underlying companies. One could argue that there are many
positive  factors  driving the U.S.  markets higher and that these factors could
persist;  stable  interest  rates,  solid economic  growth without  inflationary
pressures,  the opening up of emerging  markets,  the  acceptance of shareholder
value as the key  motivator  of  corporate  managements,  and the huge cash flow
coming into stocks supported by powerful demographic trends.

     Still,  there is no doubt that many large cap,  "blue  chip,"  stocks  have
outperformed their own businesses.  General Electric,  for example,  rose 40% in
1996 while earnings per share grew about 15%.  Another example would be Merck, a
stock up 77% in 1995 and 24% in 1996,  with  earnings in those two years up only
12% and 20%, respectively.

     Morgan Stanley's  estimate is that active managers will have an easier time
beating  the  Index  this  year.  This will be more  likely to occur if  smaller
company stocks do well.  While large cap managers  continue to feel  comfortable
with many large cap names,  at the margin there are  opportunities  in secondary
stocks,  especially  high beta growth  issues that have missed the recent market
move, but where company fundamentals are intact.

              Total Returns *
          As of December 31, 1996
- ---------------------------------------------------
1 Year    Since Inception Date 6/1/94       10 Year
 28.05%             28.05%                    --

           Comparison of Change in Value of $10,000 Investment in the
         Aggressive Growth Fund, S&P 500 and Lipper Growth Fund Average
         --------------------------------------------------------------
                             Fund                             Lipper
           Year Ended       Total             S&P 500         Growth
          December 31,      Return             Index         Average
                            10,000             10,000         10,000
            1994            10,259             10,230         10,055
            1995            14,793             14,069         13,151
            1996            18,942             17,297         15,681
                                                                 
Note: Past performance is not predictive of future performance.

Principal Asset Allocation Fund
(Francine J. Bovich)

     In a volatile year for financial  assets,  the U.S. stock market  continued
its strong  performance  (+23.2%)  but ranked 11th in global  markets  beaten by
fully  half of the  international  markets  (in  U.S.  dollars),  notably  Spain
(+40.1%),  Sweden  (+37.2%)  and Hong Kong  (+33.1%).  Markets  were  boosted by
abundant  liquidity  provided through loose monetary policy,  moderate  economic
growth and a benign inflation environment.

     Bond markets in local  currency  also had a good year with returns  ranging
from  5.9% in Japan to 24.2% in  Italy.  In the U.S.,  mixed  economic  data and
expectations of monetary  tightening  drove bond prices down well into the third
quarter until the Federal  reserve  announced  that interest  rates would remain
unchanged.  In contrast,  the European bond markets rallied  throughout the year
driven by  monetary  easing  from the core  European  central  banks,  weakening
currencies,  optimism  surrounding the prospects of the European Monetary Union,
and improving  inflation data. Japanese bond yields fell to all-time lows on the
prospect  of  substantial  fiscal  tightening  in 1997,  the  fragility  of some
financial institutions,  and doubts about the strength of the economic recovery.
Against a declining  interest  rate  backdrop,  high  yielding  debt  rallied as
investors clamored for yield.

     Throughout the year, we maintained our diversified  investment  policy.  At
year-end 1996, the Fund was invested:  32% domestic  stocks,  26%  international
stocks,  20% U.S.  domestic bonds, 9% domestic high yield bonds, 11% real estate
investment trusts ("REITs"),  and 2% short-term investments.  For 1996, the Fund
continued its positive performance gaining 12.9% relative to the Lipper Flexible
Portfolio Fund average gain of 13.6%.

     Within domestic stocks, commitments to large cap growth companies and REITs
significantly enhanced returns. In the growth segment, overweight commitments to
consumer  cyclicals,  consumer  staples and  financial  sectors were the primary
contributors to positive results.  Our REIT portfolio  benefited from an overall
positive backdrop and selected commitments to the office,  industrial, and hotel
sectors.  In addition,  we allocated a portion of the  portfolio to  "California
Recovery" companies which performed well.

     In aggregate,  the international stock results lagged the S&P 500 primarily
due to the  performance of Japan.  Japanese  stocks declined -15.5% based on the
same  concerns that drove bond yields to historic  lows.  In contrast,  European
stocks were a brighter spot thanks to the continuing efforts of most continental
governments to achieve the Maastricht criteria. Asian market returns were led by
Hong  Kong,  which  benefited  from  lessened  political  fears and an  improved
economic outlook.  Latin America enjoyed stellar performance throughout the year
and was a primary contributor to the international ADR's outperformance (+11.3%)
relative to the EAFE benchmark gain of 6.1%. The economic recovery that began in
1995 and continued throughout 1996 attracted renewed capital flows to the region
and the Fund benefited from overweight positions in Brazil and Mexico.

     Over the near term,  we expect the U.S.  market to be driven  higher by the
continuation of the positive capital market trends experienced in 1996. However,
U.S.  stocks are not cheap,  the market cycle is very long in the tooth,  and is
vulnerable  to strong  economic  data  and/or an untoward  event.  International
stocks have  benefited  from many of the same factors  which  propelled the U.S.
markets,  but on a relative  basis to the U.S.,  valuations  are not as high. In
addition, prospects for further declines in interest rates and improved economic
and earnings growth in Asia, Latin America and Europe remain probable, albeit on
a lagged basis.

     After a year of  declining  global  interest  rates,  we  expect  increased
volatility as investors analyze every data point to detect a policy change.  Fed
watchers  will be  particularly  active  given  Mr.  Greenspan's  concern  about
"irrational  exuberance."  We begin the year  overweighted  to yield sectors and
believe that a higher income strategy will serve to moderate price volatility.


                        Total Returns *
                    As of December 31, 1996
  ---------------------------------------------------------
  1 Year         Since Inception Date 6/1/94        10 Year  
  12.92%                  12.95%                      --

        Comparison of Change in Value of $10,000 Investment in the Asset
       Allocation Fund, S&P 500 and Lipper Flexible Portfolio Fund Average
      ------------------------------------------------------------------------
                           Fund                                Lipper
      Year Ended           Total           S&P 500         Flexible Portfolio
      December 31,        Return            Index               Index
                          10,000           10,000               10,000
       1994               10,052           10,230               10,008
       1995               12,128           14,069               12,518
       1996               13,696           17,297               14,220
                                                                  
Note:  Past performance is not predictive of future performance.

Principal Balanced Fund
(Judith A. Vogel)

     This balanced  portfolio  combines  stocks,  bonds and cash in a relatively
conservative mix which seeks to provide both capital  appreciation and income to
the shareholder  without taking on undue risk. The asset  allocation of the Fund
generally  approximates 60% stocks and 40% bonds. In the year ended December 31,
1996 the stock market produced exceptional results.  Aided by a healthy economy,
continued corporate profit growth, and a good dose of investor  enthusiasm,  the
S&P 500 Stock Index advanced nearly 23%. Conditions in the bond market were less
supportive  over the year.  Long-term  interest rates rose 0.70% in 1996, with a
lot of volatility  along the way, causing the bond returns to hover between zero
and 3% for the year.  Demonstrating its balanced nature, the Fund produced a 13%
annual return,  about midway between stock and bond market results and very near
the Lipper  Balanced Fund Average.  The bond portion of the Fund's  portfolio is
comprised  of U.S.  Government  notes and bonds  with an  emphasis  on safety of
principal.  The stock portion of the portfolio is concentrated in companies with
stable or growing earnings that are not terribly sensitive to economic activity.
After  six years of  economic  expansion  resulting  in high  rates of  resource
utilization,  corporate profit growth is likely to come down, causing a scarcity
of  earnings  growth.  Companies  that can  continue  to grow  earnings  will be
afforded premium valuations.  There is no independent market index against which
to measure returns of balanced  portfolios,  however,  we show the S&P 500 Stock
Index for your information.

                         Total Returns *
                    As of December 31, 1996
         ---------------------------------------------------
                                             Since Inception
         1 Year           5 Year              Date 12/18/87                     
         13.13%           11.57%                12.16%                 
                        
                        
           Comparison of Change in Value of $10,000 Investment in the
            Balanced Fund, S&P 500 and Lipper Balanced Fund Average
           ----------------------------------------------------------     
                            Fund                             Lipper
            Year Ended      Total          S&P 500          Mid Cap
           December 31,    Return           Index            Index
                           10,000           10,000          10,000
              1988         11,637           11,661          11,229
              1989         12,982           15,356          13,429
              1990         12,147           14,877          13,355
              1991         16,321           19,412          16,930
              1992         18,410           20,891          18,122
              1993         20,447           22,992          20,066
              1994         20,019           23,294          19,561
              1995         24,941           32,037          24,482
              1996         28,215           39,388          27,851
                                    
Note: Past performance is not predictive of future performance.

Principal Capital Accumulation Fund
(David L. White and Catherine A. Green)

     The  strategy  with this  portfolio  is to hold common  stocks of companies
based on a  valuation  that is  attractive  when  compared  to the  market.  The
analytical staff looks at companies' current valuations  compared to the market,
then at historical information to compare valuations to historical averages. The
focus is on the  fundamentals  of an industry and the company to  determine  the
current  and  future  outlook  as these  potential  investments.  From there the
portfolio is constructed to provide a diversified set of investments.

     The Fund  outperformed  the S&P 500 Index and Lipper Growth and Income Fund
Average for 1996.  The  strength of the market was in much fewer  stocks than in
the past.  The volatility  between  industries was much greater than the overall
results.  The Fund  benefited  from several areas of exposure.  Banks and health
care were the strongest  areas for the Fund during the year.  The focus has been
away from the more  cyclical  areas of the economy  which also helped during the
year.  As the economic  cycle  progresses,  the market  places more  emphasis on
companies  with  consistent  earnings  growth,  and we have tended to overweight
these  areas of the  market.  As the  market  performance  continues  to narrow,
however,  it  becomes  increasingly  difficult  to select the  correct  areas of
overperformance.

                   Total Returns *
               As of December 31, 1996
         ----------------------------------------
         1 Year          5 Year           10 Year
         23.50%          14.08%            13.08%

           Comparison of Change in Value of $10,000 Investment in the
  Capital Accumulation Fund, S&P 500 and Lipper Growth and Income Fund Average
  ----------------------------------------------------------------------------
                    Fund                 S&P 500                 Lipper
   Year Ended       Total                 Stock              Growth & Income
  December 31,      Return                Index                Fund Average
                    10,000               10,000                  10,000
     1987           10,647               10,526                  10,184
     1988           12,183               12,274                  11,814
     1989           14,155               16,163                  14,596
     1990           12,759               15,659                  13,946
     1991           17,693               20,433                  18,002
     1992           19,377               21,990                  19,618
     1993           20,888               24,201                  21,884
     1994           20,990               24,519                  21,678
     1995           27,688               33,722                  28,360
     1996           34,193               41,460                  34,253
                                                    
Note: Past performance is not predictive of future performance.

Principal Emerging Growth Fund
(Michael R. Hamilton)

     The equity market was strong in 1996,  but within the market there were two
different trends.  Large-cap stocks performed much better than small-cap stocks.
The  Emerging  Growth  Fund  returned  19.13%  compared  with the Lipper Mid Cap
Average of 17.9%.  The Fund and the  Lipper  Average  trailed  the S&P 500 Index
because of their  emphasis on small cap stocks.  While both trailed the S&P 500,
this was a good year for the fund.

     The  financial  market  continues  to  grapple  with the  paradox of strong
economic growth with no apparent inflation.  Productivity will be key in 1997 if
inflation is to remain benign.  The Fund's portfolio  continues to be focused on
companies that should enhance productivity of both labor and capital. Several of
the technology,  service and cyclical areas support this emphasis. The portfolio
is also overweighted in the financial sector as bank consolidation continues.

     Continued  profit growth will be important in 1997 as well.  Companies with
more predictable and visible earnings growth are preferred. This continues to be
those  that are low cost  producers  and have  competitive  barriers  to  entry.
Selectivity in all sectors will be crucial to outperformance.


              Total Returns *                      
          As of December 31, 1996                  
- ---------------------------------------------------
1 Year     5 Year     Since Inception Date 12/18/87
21.11%      16.64%                 17.73%          
                                        
                  Comparison of Change in Value of $10,000 Investment
                    in the Emerging Growth Fund, S&P 500 and
                          Lipper Mid Cap Fund Average
                -----------------------------------------------------      
                                     Fund                      Lipper          
                 Year Ended          Total       S&P 500       MID CAP 
                 December 31,       Return        Index        Index           
                                    10,000        10,000       10,000          
                    1988            12,369        11,661       11,476          
                    1989            15,070        15,356       14,586          
                    1990            13,186        14,877       14,067          
                    1991            20,240        19,412       21,275          
                    1992            23,264        20,891       23,213          
                    1993            27,750        22,992       26,625          
                    1994            27,967        23,294       26,079          
                    1995            36,080        32,037       34,469          
                    1996            43,697        39,388       40,646          
                                                   
Note:  Past performance is not predictive of future performance.        

Principal Growth Fund
(Michael R. Hamilton)

     The  Growth  Fund  struggled  against  the market in 1996;  struggle  being
relative as 12.23% return is respectable from a historical perspective.  The S&P
500 Index last year was heavily  influenced by the top 25 holdings in the Index.
These are very large companies.  The Fund is more diversified than the Index and
therefore its results were more  representative of the broader market.  With the
market  continuing to struggle  against the potential of an economic boom on one
hand,  versus a slowing or recession on the other, the market could be subjected
to emotional swings depending on the inflation outlook.

     The  Fund's  portfolio  still has a large  focus on health  care  given the
demographics  of the  United  States.  This  was not a  strong  sector  in 1996,
particularly  the managed  care  companies  of which the  portfolio  has a large
exposure.  Also,  the  portfolio has large  positions in  technology  and growth
cyclicals.  These  companies  should do well if the  economy  continues  to move
forward which is indicated by current data.

     The portfolio  contains many  companies that are able to compete on a world
wide basis. This is important as global competition continues.

                    Total Returns *                         
                 As of December 31, 1996  
  -------------------------------------------------------                       
  1 Year         Since Inception Date 5/2/94      10 Year                     
  12.51%                  16.12%                    --            
                                
           Comparison of Change in Value of $10,000 Investment in the
              Growth Fund, S&P 500 and Lipper Growth Fund Average
       --------------------------------------------------------------- 
                              Fund                            Lipper  
       Year Ended             Total         S&P 500           Growth  
       December 31,          Return          Index             Index   
                             10,000         10,000            10,000  
       1994                  10,542         10,397            10,090  
       1995                  13,243         14,299            13,197  
       1996                  14,899         17,580            15,736  
                                                      
Note:  Past performance is not predictive of future performance.        

Principal World Fund
(Scott D. Opsal)

     The  Principal  World Fund's 26.2% total return in 1996 was driven by broad
based market rallies across Europe.  Several  European markets have climbed more
than 20% in 1996,  with  Japan  and  Italy  being  the only  major  markets  not
reflecting  strong gains.  The Fund's  investment  strategy of holding stocks in
smaller European economies  produced  outperformance as interest rate moves have
been favorable this year.  Long bond yields in secondary  European  markets fell
while  rates  in  the  stronger  core  countries  have  inched  up.  The  Fund's
overexposure  to the falling rate markets and  underexposure  to the rising rate
markets was a significant positive factor producing returns that exceeded EAFE's
6.1% and the average international fund in 1996.

     The Fund also benefited from  non-cyclical  stockholdings in Europe.  Food,
drug,  technology,  and stable growth  cyclicals have  outperformed  the heavier
cyclical  industries.  The Fund's move into non-cyclical  growth stocks early in
the year proved  timely.  The Fund  remains  underweighted  in Japan due to poor
valuations  and a weak  economic  outlook.  Japan has been the worst  performing
major  market,  and the Fund's lack of  exposure  to this  market  also  boosted
relative returns.

     Adverse currency changes  diminished the Fund's returns as measured in U.S.
dollars by an  estimated  2%. We believe the EAFE index has  suffered a currency
loss  exceeding 4%, and the average  manager has lost an estimated 3%. Thus, the
Fund's  investment  strategy  placed it in markets  suffering  relatively  small
foreign exchange losses thereby aiding relative return performance.

     The  Principal  World Fund is subject to  specific  risks  associated  with
foreign currency rates, foreign taxation and foreign economies.


                      Total Returns *                      
                 As of December 31, 1996                   
     ----------------------------------------------------
     1 Year    Since Inception Date 5/2/94       10 Year   
     25.09%              12.83%                    --      
                                
           Comparison of Change in Value of $10,000 Investment in the
             World Fund, EAFE and Lipper International Fund Average
          ------------------------------------------------------------   
                            Fund      Morgan Stanley         Lipper  
          Year Ended       Total           EAFE          International   
          December 31,    Return          Index               Index   
                           10,000        10,000              10,000  
          1994              9,663         9,990               9,758   
          1995             11,032        11,110              10,676  
          1996             13,800        11,781              11,934  
                                     
Note:  Past performance is not predictive of future performance.   

Important Notes of the Growth-Oriented Funds:

Standard & Poor's 500 Stock Index:  an unmanaged index of 500 widely held common
stocks representing industrial,  financial, utility and transportation companies
listed  on the  New  York  Stock  Exchange,  American  Stock  Exchange  and  the
Over-the-Counter market.

Lipper Growth Fund Average: This average consists of funds which normally invest
in companies whose long-term earnings are expected to grow significantly  faster
than the  earnings  of the  stocks  represented  in the  major  unmanaged  stock
indices. The one-year average currently contains 669 funds.

Lipper  Flexible  Portfolio Fund Average:  This average  consists of funds which
allocate their  investments  across various asset  classes,  including  domestic
common stocks, bonds and money market instruments, with a focus on total return.
The one-year average currently contains 186 funds.

Lipper  Balanced  Fund  Average:  this  average  consists of mutual  funds which
attempt to conserve  principal by maintaining at all times a balanced  portfolio
of both stocks and bonds. Typically, the stock/bond ratio ranges around 60%/40%.
The one year average currently contains 272 mutual funds.

Lipper  Growth & Income  Fund  Average:  this  average  consists  of funds which
combine a growth of earnings  orientation  and an income  requirement  for level
and/or rising dividends. The one year average currently contains 522 funds.

Lipper Mid Cap Fund Average:  This average consists of funds which by prospectus
or portfolio practice,  limit their investments to companies with average market
capitalizations  and/or  revenues  between $800  million and the average  market
capitalization  of the Wilshire  4500 Index (as  captured by the Vanguard  Index
Extended Market Fund). The one-year average currently contains 154 funds.

Morgan  Stanley  Capital  International  EAFE  (Europe,  Australia and Far East)
Index:  This average  reflects an arithmetic,  market value weighted  average of
performance of 1,920 listed  securities  which are listed on the stock exchanges
of the following countries:  Australia,  Austria, Belgium, Denmark, Netherlands,
New Zealand, Norway,  Singapore/Malaysia,  Spain, Sweden,  Switzerland,  and the
United Kingdom.

Lipper  International Fund Average:  This average consists of funds which invest
in securities  primarily  traded in markets  outside of the United  States.  The
one-year average currently contains 331 funds.

Income-Oriented Funds

Principal Bond Fund
(Scott A. Bennett)

     The Principal Bond Fund's performance in 1996 lagged when compared to 1995.
1995 was a banner year, mainly because of dramatically declining interest rates.
During 1996 interest rates increased  throughout most of the year based on fears
of  increasing  inflation.  This hurt the  Fund's  relative  performance  as the
duration  target of 7 years  (actual  duration  at  12/31/96  was 6.98 years) is
longer than the average BBB rated bond fund and the BAA Lehman  Corporate Index.
Relative  performance was also negatively  impacted by the lack of a significant
amount of less than  investment  grade bonds in the portfolio.  High yield (less
than investment  grade) debt performed  extremely well during 1996, with many of
the top performing funds in the Lipper BAA universe having significant exposures
to this asset class.

     Over the long-term,  the Fund continues to outperform the average BBB fund.
This is attributed to remaining  fully invested and not trying to guess interest
rates. The BBB corporate bond class continued to be an attractive asset class in
1996,   outperforming  all  other  taxable  investment  grade  classes.  Spreads
continued  to narrow  during the year with  defaults  low and a large  amount of
funds chasing the available bonds.

                    Total Returns *                               
               As of December 31, 1996                            
- --------------------------------------------------------------
1 Year              5 Year     Since Inception Date 12/18/87      
  2.36%             8.20%                 9.55%                   

  Comparison of Change in Value of $10,000 Investment in the Bond Fund, Lehman
 Brothers BAA Corporate Index and Lipper Corporate Debt BBB Rated Fund Average
 -----------------------------------------------------------------------------
                       Fund              Lehman           Lipper
     Year Ended       Total                BAA              BBB
     December 31,    Return              Index              Avg
                      10,000            10,000            10,000
      1988            10,991            11,129            10,900
      1989            12,514            12,699            12,060
      1990            13,167            13,595            12,751
      1991            15,369            16,113            15,020
      1992            16,810            17,512            16,258
      1993            18,771            19,665            18,261
      1994            18,227            18,707            17,447
      1995            22,268            22,959            20,948
      1996            22,794            23,882            21,616
                                                   
Note:  Past performance is not predictive of future performance.    
                                        
Principal Government Securities Fund
(Martin J. Schafer)

     Interest rates rose in 1996, which dampened  absolute fixed income returns.
The Fund underperformed the Lipper U.S. Mortgage Fund Average and the Lehman MBS
Index in 1996 due to its slightly  longer  duration.  However,  since the Fund's
inception of 4/9/87 it has  outperformed  the Lipper U.S.  Mortgage Fund Average
and is competitive with the Lehman MBS Index.

     Results were  enhanced  last year through  identification  and selection of
certain  undervalued sectors of mortgage- backed securities for a portion of the
portfolio.  These  securities  have now become very popular with Wall Street and
other investors, resulting in their increasing in value.

     The current  portfolio is well  positioned  for the period ahead.  It has a
number of securities that are "seasoned" (e.g., original 30 year loans that have
been  outstanding  for three years or more) and therefore  valued more highly in
the marketplace.  There are few securities  priced above par, so prepayment risk
is negligible.  If the future  continues to be an era of economic  prosperity we
should  continue to see strong  housing  markets and housing  turnover that will
cause  prepayments  on our  securities  to  exceed  market  expectations.  These
repayments  are welcomed,  as the portfolio is priced at a discount and the Fund
will be paid-off at par.

                    Total Returns *
                As of December 31, 1996
- --------------------------------------------------
1 Year     5 Year     Since Inception Date 4/9/87                               
 3.35%     6.68%                8.63%                          
                                
Comparison of Change in Value of $10,000 Investment in the Government Securities
   Fund, Lehman Brothers Mortgage Index and Lipper U.S. Mortgage Fund Average
- --------------------------------------------------------------------------------
                               Fund        Lehman        Lipper  
          Year Ended          Total       Mortgage    U.S. Mortgage   
          December 31,        Return       Index          Index   
                              10,000      10,000        10,000  
               1987           10,099      10,204        10,104  
               1988           10,939      11,094        10,858  
               1989           12,645      12,808        12,224  
               1990           13,852      14,183        13,370  
               1991           16,200      16,410        15,348  
               1992           17,308      17,551        16,285  
               1993           19,051      18,751        17,499  
               1994           18,188      18,450        16,769  
               1995           21,656      21,549        19,491  
               1996           22,381      22,702        20,245  

Note:  Past performance is not predictive of future performance.   

Important Notes of the Income-Oriented Funds:

Lehman Brothers,  BAA Corporate Index: an unmanaged index of all publicly issued
fixed rate  nonconvertible,  dollar-denominated,  SEC-registered  corporate debt
rated Baa or BBB by Moody's or S&P.

Lipper  Corporate Debt BBB Rated Funds Average:  this average consists of mutual
funds  investing at least 65% of their assets in corporate and  government  debt
issues  rated by S&P or Moody's  in the top four  grades.  The one year  average
currently contains 102 mutual funds.

Lehman Brothers Mortgage Index: an unmanaged index of 15- and 30-year fixed rate
securities  backed  by  mortgage  pools  of  the  Government  National  Mortgage
Association (GNMA),  Federal Home Loan Mortgage Corporation (FHLMC), and Federal
National Mortgage Association (FNMA).

Lipper U.S.  Mortgage  Fund  Average:  this  average  consists  of mutual  funds
investing  at least  65% of  their  assets  in  mortgages/securities  issued  or
guaranteed  as to  principal  and  interest by the U.S.  Government  and certain
federal agencies. The one year average currently contains 59 mutual funds.

Note: Mutual fund data from Lipper Analytical Services, Inc.

DETERMINATION OF NET ASSET VALUE OF FUND SHARES

     The net asset  value of each  Fund's  shares is  determined  daily,  Monday
through  Friday,  as of the close of  trading  on the New York  Stock  Exchange,
except on days on which changes in the value of the Fund's portfolio  securities
will not materially  affect the current net asset value of the Fund's redeemable
securities,  on days during  which a Fund  receives no order for the purchase or
sale  of its  redeemable  securities  and no  tender  of  such  a  security  for
redemption, and on customary national business holidays. The net asset value per
share of each Fund is determined by dividing the value of the Fund's  securities
plus all other  assets,  less all  liabilities,  by the  number  of Fund  shares
outstanding.

Growth-Oriented and Income-Oriented Funds

     The following  valuation  information  applies to the  Growth-Oriented  and
Income-Oriented  Funds.  Securities  for which  market  quotations  are  readily
available  are valued using those  quotations.  Other  securities  are valued by
using market quotations, prices provided by market makers or estimates of market
values  obtained from yield data and other factors  relating to  instruments  or
securities   with  similar   characteristics   in  accordance   with  procedures
established in good faith by the Board of Directors.  Securities  with remaining
maturities of 60 days or less are valued at amortized cost when it is determined
by the Board that amortized cost reflects fair value. Other assets are valued at
fair value as determined in good faith by the Board of Directors of the Fund.

     As previously described,  some of the Funds may purchase foreign securities
whose trading is substantially  completed each day at various times prior to the
close of the New York  Stock  Exchange.  The values of such  securities  used in
computing  net asset  value per share are usually  determined  as of such times.
Occasionally,  events  which  affect the values of such  securities  and foreign
currency  exchange rates may occur between the times at which they are generally
determined and the close of the New York Stock Exchange and would  therefore not
be  reflected  in the  computation  of the  Fund's  net asset  value.  If events
materially affecting the value of such securities occur during such period, then
these  securities will be valued at their fair value as determined in good faith
by the  Manager  or  Sub-Advisor  under  procedures  established  and  regularly
reviewed by the Board of  Directors.  To the extent the Fund  invests in foreign
securities  listed on foreign  exchanges  which  trade on days on which the Fund
does not  determine  its net  asset  value,  for  example  Saturdays  and  other
customary  national  U.S.  Holidays,   the  Fund's  net  asset  value  could  be
significantly affected on days when shareholders have no access to the Fund.

Money Market Fund

     The Money  Market Fund  values its  securities  at  amortized  cost.  For a
description of this calculation procedure see the Funds' Statement of Additional
Information.

PERFORMANCE CALCULATION

     From  time  to  time,  the  Funds  may  publish  advertisements  containing
information   (including  graphs,   charts,   tables  and  examples)  about  the
performance  of one or more of the  Funds.  The  Funds'  yield and total  return
figures  described  below  will  vary  depending  upon  market  conditions,  the
composition of the Funds' portfolios and operating  expenses.  These factors and
possible  differences in the methods used in calculating  yield and total return
should  be  considered  when  comparing  the  Funds'   performance   figures  to
performance figures published for other investment vehicles.  The Funds may also
quote  rankings,  yields or  returns as  published  by  independent  statistical
services or publishers,  and  information  regarding the  performance of certain
market  indices.  Any  performance  data  quoted for the Funds  represents  only
historical performance and is not intended to indicate future performance of the
Funds.  The  calculation  of average annual total return and yield for the Funds
does not include  fees and charges of the separate  accounts  that invest in the
Funds and,  therefore,  does not reflect  the  investment  performance  of those
separate accounts.  For further information on how the Funds calculate yield and
total return figures, see the Statement of Additional Information.

Average Annual Total Return

     Each Fund may advertise its respective average annual total return. Average
annual total return for each Fund is computed by calculating  the average annual
compounded  rate of return over the stated  period that would  equate an initial
$1,000  investment to the ending  redeemable  value assuming the reinvestment of
all  dividends  and capital  gains  distributions  at net asset value.  The same
assumptions  are made when  computing  cumulative  total  return by dividing the
ending  redeemable  value by the  initial  investment.  The Funds may also quote
rankings,  yields or returns as published by independent statistical services or
publishers, and information regarding the performance of certain market indices.

Yield and Effective Yield

     From time to time the Money Market Fund may advertise its respective  yield
and effective  yield. The yield of the Fund refers to the income generated by an
investment in the Fund over a seven-day period.  This income is then annualized.
That is, the amount of income  generated by the  investment  during that week is
assumed  to be  generated  each  week over a  52-week  period  and is shown as a
percentage of the investment.  The effective yield is calculated  similarly but,
when annualized, the income earned by an investment in the Fund is assumed to be
reinvested.  The effective  yield will be slightly higher than the yield because
of the compounding effect of this assumed reinvestment.

     The yield for the Money  Market  Fund will  fluctuate  daily as the  income
earned  on the  investments  of the Fund  fluctuates.  Accordingly,  there is no
assurance  that the yield quoted on any given occasion will remain in effect for
any period of time. The Fund is an open-end  investment  company and there is no
guarantee  that the net asset  value or any stated  rate of return  will  remain
constant.  A  shareholder's  investment  in the Fund is not  insured.  Investors
comparing  results of the Fund with  investment  results  and yields  from other
sources such as banks or savings and loan  associations  should understand these
distinctions.  Historical and comparative  yield  information  may, from time to
time, be presented by the Fund.

INCOME DIVIDENDS, DISTRIBUTIONS AND TAX STATUS

     It is  the  policy  of  each  Fund  to  distribute  substantially  all  net
investment  income and net realized gains.  Through such  distributions,  and by
satisfying certain other  requirements,  the Funds intend to qualify for the tax
treatment  accorded  to  regulated  investment  companies  under the  applicable
provisions of the Internal Revenue Code. This means that in each year in which a
Fund so qualifies it will be exempt from federal  income tax upon the amounts so
distributed to investors.

     Any dividends from the net investment income of the Funds (except the Money
Market Fund) will normally be payable to the shareholders  annually, and any net
realized  gains will be  distributed  annually.  All dividends and capital gains
distributions are applied to purchase  additional Fund shares at net asset value
as of the payment date without the imposition of any sales charge.

     Each Fund will  notify  shareholders  of the  portion of each  distribution
which  constitutes  investment income or capital gain. In view of the complexity
of tax considerations,  it is advisable for Eligible Purchasers  considering the
purchase of shares of the Funds to consult  with tax advisors on the federal and
state tax aspects of their investments and redemptions.

Money Market Fund

     The Money Market Fund  declares  dividends of all its daily net  investment
income on each day the Fund's net asset value per share is determined. Dividends
are payable daily and are automatically reinvested in full and fractional shares
of the Fund at the then  current net asset value unless a  shareholder  requests
payment in cash.

     Net  investment  income,  for  dividend  purposes,  consists of (1) accrued
interest  income plus or minus accrued  discount or amortized  premium;  plus or
minus (2) all net short-term  realized  gains and losses;  minus (3) all accrued
expenses of the Fund. Expenses of the Fund are accrued each day. Net income will
be  calculated  immediately  prior to the  determination  of net asset value per
share of the Fund.

     Since the Fund's policy is, under normal  circumstances,  to hold portfolio
securities to maturity and to value  portfolio  securities at amortized cost, it
does not expect any capital gains or losses.  If the Fund does experience gains,
however,  it could  result in an increase in  dividends.  Capital  losses  could
result in a decrease in  dividends.  If for some  extraordinary  reason the Fund
realizes net long-term  capital  gains,  it will  distribute  them once every 12
months.

     Since the net income of the Fund  (including  realized  gains and losses on
the portfolio  securities) is declared as a dividend each time the net income of
the Fund is  determined,  the net asset  value  per  share of the Fund  normally
remains at $1.00 immediately after each determination and dividend  declaration.
Any  increase  in  the  value  of  a  shareholder's   investment  in  the  Fund,
representing reinvestment of dividend income, is reflected by an increase in the
number of shares of the Fund in the account.

     Normally  the Fund  will  have a  positive  net  income at the time of each
determination  thereof.  Net income may be negative if an  unexpected  liability
must be accrued or a loss is realized.  If the net income of the Fund determined
at any time is a negative amount,  the net asset value per share will be reduced
below  $1.00.  If this  happens,  the Fund may endeavor to restore the net asset
value  per  share to $1.00 by  reducing  the  number  of  outstanding  shares by
redeeming  proportionately from shareholders without the payment of any monetary
consideration,  such number of full and  fractional  shares as is  necessary  to
maintain a net asset value per share of $1.00.  Each  shareholder will be deemed
to have agreed to such a redemption in these  circumstances  by investing in the
Fund. The Fund may seek to achieve the same objective of restoring the net asset
value  per  share  to $1.00  by not  declaring  dividends  from  net  income  on
subsequent days until restoration,  with the result that the net asset value per
share would  increase to the extent of positive net income which is not declared
as a dividend, or any other method approved by the Board of Directors.

     The Board of Directors may revise the above  dividend  policy,  or postpone
the  payment of  dividends,  if the Fund  should  have or  anticipate  any large
presently  unexpected  expense,  loss or  fluctuation in net assets which in the
opinion of the Board might have a significant adverse affect on shareholders.

ELIGIBLE PURCHASERS AND PURCHASE OF SHARES

     Only  Eligible  Purchasers  may  purchase  shares  of the  Funds.  Eligible
Purchasers  are  limited to (a)  separate  accounts  of  Principal  Mutual  Life
Insurance  Company or of other insurance  companies;  (b) Principal  Mutual Life
Insurance Company or any subsidiary or affiliate thereof;  (c) trustees or other
managers of any qualified profit sharing, incentive or bonus plan established by
Principal Mutual Life Insurance  Company or any subsidiary or affiliate  thereof
for the  employees of such company,  subsidiary  or affiliate.  Such trustees or
managers  may  purchase  Fund  shares  only in their  capacities  as trustees or
managers  and not for their  personal  accounts.  The Board of Directors of each
Fund  reserves  the  right to  broaden  or limit  the  designation  of  Eligible
Purchasers.

   
     Principal   Aggressive  Growth,   Principal  Asset  Allocation,   Principal
Balanced,  Principal Bond,  Principal Capital  Accumulation,  Principal Emerging
Growth,  Principal  Government  Securities,  Principal  Growth,  Principal Money
Market and Principal World Funds each serve as an underlying  investment  medium
for variable  annuity  contracts and variable life  insurance  policies that are
funded in separate  accounts  established  by  Principal  Mutual Life  Insurance
Company.  It is  conceivable  that in the future it may be  disadvantageous  for
variable life insurance separate accounts and variable annuity separate accounts
to invest in the Funds  simultaneously.  Although neither  Principal Mutual Life
Insurance Company nor the Funds currently foresee any such disadvantages  either
to variable life insurance policy owners or to variable annuity contract owners,
each Fund's  Board of Directors  intends to monitor  events in order to identify
any material  conflicts  between such policy  owners and contract  owners and to
determine what action, if any, should be taken in response thereto.  Such action
could  include the sale of Fund shares by one or more of the separate  accounts,
which could have adverse consequences. Material conflicts could result from, for
example,  (1) changes in state insurance laws, (2) changes in Federal income tax
law, (3) changes in the investment management of the Fund, or (4) differences in
voting  instructions  between  those  given by policy  owners and those given by
contract owners.
    

     Shares are  purchased  from Princor  Financial  Services  Corporation,  the
principal  underwriter  for the Funds.  There are no sales charges on the Funds'
shares.  There are no  restrictions  on  amounts  to be  invested  in the Funds'
shares.

     Shareholder accounts for each Fund will be maintained under an open account
system. Under this system, an account is automatically opened and maintained for
each new  investor.  Each  investment  is  confirmed  by sending the  investor a
statement of account showing the current purchase and the total number of shares
then  owned.  The  statement  of account is treated by each Fund as  evidence of
ownership  of Fund  shares in lieu of stock  certificates,  and  unless  written
request is made to the Fund, stock  certificates will not be issued or delivered
to investors.  Certificates, which can be stolen or lost, are unnecessary except
for special purposes such as collateral for a loan.  Fractional interests in the
Funds' shares are reflected to three decimal places in the statement of account,
but any stock certificates will be issued only for full shares owned.

     If an offer to purchase  shares is received by any of the Funds  before the
close of trading on the New York Stock  Exchange,  the shares  will be issued at
the offering price (net asset value of Fund shares)  computed on that day. If an
offer is received  after the close of trading or on a day which is not a trading
day,  the shares  will be issued at the  offering  price  computed  on the first
succeeding  day on which a price is  determined.  Dividends  on the Money Market
Fund  shares  will be paid on the next day  following  the  effective  date of a
purchase order.

SHAREHOLDER RIGHTS

     The following  information  is  applicable to each of the Principal  Funds.
Each  Fund  share is  entitled  to one vote  either in person or by proxy at all
shareholder  meetings  for that  Fund.  This  includes  the right to vote on the
election of directors,  selection of independent  accountants  and other matters
submitted  to meetings of  shareholders.  Each share has equal rights with every
other share as to dividends, earnings, voting, assets and redemption. Shares are
fully paid and  non-assessable,  and have no preemptive  or  conversion  rights.
Shares may be issued as full or fractional shares, and each fractional share has
proportionately  the same rights,  including  voting, as are provided for a full
share.  Shareholders  of each of these  Funds may  remove any  director  with or
without  cause by the vote of a majority  of the votes  entitled to be cast at a
meeting of shareholders.

     The bylaws of each Fund provide that the Board of Directors of the Fund may
increase or decrease the aggregate number of shares which the Fund has authority
to issue without a shareholder vote.

     The bylaws of each Fund also  provide that the Fund need not hold an annual
meeting of  shareholders  in any year in which none of the following is required
to be  acted  on by  shareholders  under  the  Investment  Company  Act of 1940:
election of directors;  approval of investment advisory agreement;  ratification
of selection of independent  public  accountants;  and approval of  distribution
agreement.  The Funds intend to hold shareholder  meetings only when required by
law and at such other  times as may be deemed  appropriate  by their  respective
Boards of Directors.

     Shareholder  inquiries  should be  directed to the  applicable  Fund at The
Principal Financial Group, Des Moines, Iowa 50392.

     NON-CUMULATIVE  VOTING: The Funds' shares have non-cumulative voting rights
which  means  that the  holders  of more than 50% of the  shares  voting for the
election of directors  of a Fund can elect 100% of the  directors if they choose
to do so, and in such event,  the holders of the remaining shares voting for the
election of directors will not be able to elect any directors.

     Principal Mutual Life Insurance  Company votes each Fund's shares allocated
to each of its separate accounts  registered under the Investment Company Act of
1940 and attributable to variable  annuity  contracts or variable life insurance
policies  participating  therein in accordance with  instructions  received from
contract or policy holders,  participants  and annuitants.  Other shares of each
Fund held by each  registered  separate  account,  including  those for which no
timely  instructions  are received,  are voted in proportion to the instructions
that are received  with respect to contracts or policies  participating  in that
separate  account.  Shares of each of the Funds held in the  general  account of
Principal Mutual Life Insurance Company or in its unregistered separate accounts
are voted in  proportion to the  instructions  that are received with respect to
contracts and policies participating in its registered and unregistered separate
accounts.  If Principal  Mutual  determines  pursuant to  applicable  law that a
Fund's  shares held in one or more separate  accounts or in its general  account
need  not  be  voted   pursuant  to   instructions   received  with  respect  to
participating  contracts or policies,  it then may vote those Fund shares in its
own right.

REDEMPTION OF SHARES

     Except for the third paragraph below,  most of the following  discussion of
redemption  procedures  is  relevant  only to  Eligible  Purchasers  other  than
variable  annuity and variable life separate  accounts of Principal  Mutual Life
Insurance Company, and its wholly-owned subsidiaries.

     Each Fund will  redeem  its  shares  upon  request.  There is no charge for
redemption.  If no certificates have been issued, a shareholder  simply writes a
letter to the appropriate  Fund requesting  redemption of any part or all of the
shares.  The letter  must be signed  exactly as the  account is  registered.  If
certificates have been issued, they must be properly endorsed and forwarded with
the request.  If payment is to be made to the  registered  shareholder  or joint
shareholders,  the Fund will not  require a signature  guarantee  as a part of a
proper endorsement;  otherwise the shareholder's signature must be guaranteed by
either  a  commercial  bank,  trust  company,  credit  union,  savings  and loan
association,  national  securities  exchange member, or by a brokerage firm. The
price at which the shares are redeemed  will be the net asset value per share as
next  computed  after the  request  (with  appropriate  certificate,  if any) is
received by the Fund in proper and complete form. The amount received for shares
upon redemption may be more or less than the cost of such shares  depending upon
the net asset value at the time of redemption.

     Redemption  proceeds will be sent within three  business days after receipt
of request for  redemption  in proper form.  However,  each Fund may suspend the
right of  redemption  during any period  when (a)  trading on the New York Stock
Exchange is restricted as determined by the Securities  and Exchange  Commission
or such  Exchange  is closed  for  other  than  weekends  and  holidays;  (b) an
emergency exists, as determined by the Securities and Exchange Commission,  as a
result  of  which  (i)  disposal  by the Fund of  securities  owned by it is not
reasonably  practicable,  or (ii) it is not reasonably  practicable for the Fund
fairly to determine the value of its net assets;  or (c) the Commission by order
so permits  for the  protection  of  security  holders of the Fund.  A Fund will
redeem only those shares for which it has received  good  payment.  To avoid the
inconvenience  of such a delay,  shares may be purchased with a certified check,
bank  cashier's  check or money  order.  During the  period  prior to the time a
redemption  from the Money  Market Fund is  effective,  dividends on such shares
will accrue and be payable and the shareholder  will be entitled to exercise all
other rights of beneficial ownership.

     Restricted  Transfer:  Shares of each of the Funds may be transferred to an
Eligible Purchaser.  However, whenever any of the Funds is requested to transfer
shares  to other  than an  Eligible  Purchaser,  the  Fund has the  right at its
election  to  purchase  such  shares  at their net asset  value  next  effective
following  the time at which the request for  transfer is  presented;  provided,
however,  that the Fund must notify the transferee or transferees of such shares
in writing  of its  election  to  purchase  such  shares  within  seven (7) days
following the date of such request and  settlement for such shares shall be made
within such seven-day period.

ADDITIONAL INFORMATION

     Custodian:  Bank of New York, 48 Wall Street,  New York, New York 10286, is
custodian  of the  portfolio  securities  and cash  assets  of each of the Funds
except the World Fund. The custodian for the World Fund is Chase Manhattan Bank,
Global Securities Services,  Chase Metro Tech Center,  Brooklyn, New York 11245.
The custodians perform no managerial or policymaking functions for the Funds.

     Organization and Share Ownership:  The Funds were incorporated in the state
of Maryland on the following  dates:  Aggressive  Growth Fund - August 20, 1993;
Asset Allocation Fund - August 20, 1993; Balanced Fund - November 26, 1986; Bond
Fund - November 26, 1986;  Capital  Accumulation  Fund - May 26, 1989 (effective
November 1, 1989  succeeded to the business of a predecessor  Fund that had been
incorporated  in Delaware on February 6, 1969);  Emerging Growth Fund - February
20, 1987;  Government  Securities Fund - June 7, 1985;  Growth Fund - August 20,
1993;  Money  Market  Fund - June 10,  1982;  and World Fund - August 20,  1993.
Principal  Mutual Life  Insurance  Company owns 100% of each Fund's  outstanding
shares.

     Capitalization:  The  authorized  capital  stock of each Fund  consists  of
100,000,000 shares of common stock (500,000,000 for Principal Money Market Fund,
Inc.), $.01 par value.

     Financial Statements:  Copies of the financial statements of each Fund will
be mailed to each shareholder of that Fund  semi-annually.  At the close of each
fiscal  year,  each  Fund's  financial  statements  will be audited by a firm of
independent auditors.  The firm of Ernst & Young LLP has been appointed to audit
the financial statements of each Fund for their respective present fiscal years.

     Registration Statement: This Prospectus omits some information contained in
the  Statement  of  Additional   Information  (also  known  as  Part  B  of  the
Registration  Statement)  and Part C of the  Registration  Statements  which the
Funds  have  filed  with the  Securities  and  Exchange  Commission.  The Funds'
Statement of Additional  Information  is hereby  incorporated  by reference into
this Prospectus. A copy of the Funds' Statement of Additional Information can be
obtained upon request,  free of charge,  by writing or telephoning the Fund. You
may  obtain  a copy of Part C of the  Registration  Statements  filed  with  the
Securities and Exchange Commission,  Washington,  D.C., from the Commission upon
payment of the prescribed fees.

     Principal   Underwriter:   Princor  Financial  Services  Corporation,   The
Principal  Financial  Group,  Des  Moines,  Iowa  50392-0200,  is the  principal
underwriter for each of the Principal Funds.



     The  Principal(R)  Mutual  Funds  ("Principal  Funds")  described  in  this
Prospectus  are a  family  of  separately  incorporated,  diversified,  open-end
management investment companies, commonly called mutual funds, which provide the
following range of investment objectives:

                              Growth-Oriented Funds

PRINCIPAL  Balanced Fund,  Inc.  seeks to generate a total return  consisting of
current  income and capital  appreciation  while  assuming  reasonable  risks in
furtherance of the investment objective.

PRINCIPAL Capital  Accumulation Fund, Inc. seeks to achieve primarily  long-term
capital  appreciation  and  secondary  growth of investment  income  through the
purchase  primarily  of  common  stocks,  but  the  Fund  may  invest  in  other
securities.

PRINCIPAL  Emerging Growth Fund,  Inc. seeks to achieve capital  appreciation by
investing  primarily  in  securities  of  emerging  and  other   growth-oriented
companies.

PRINCIPAL  Growth  Fund,  Inc.  seeks  growth of capital  through  the  purchase
primarily of common stocks, but the Fund may invest in other securities.

PRINCIPAL World Fund,  Inc. seeks long-term  growth of capital by investing in a
portfolio of equity  securities of companies  domiciled in any of the nations of
the world.

                              Income-Oriented Funds

PRINCIPAL  Bond  Fund,  Inc.  seeks to  provide  as high a level of income as is
consistent with preservation of capital and prudent investment risk.

PRINCIPAL Government Securities Fund, Inc. seeks a high level of current income,
liquidity  and safety of  principal.  The Fund seeks to  achieve  its  objective
through the purchase of  obligations  issued or  guaranteed by the United States
Government  or its  agencies,  with  emphasis on  Government  National  Mortgage
Association  Certificates ("GNMA Certificates").  Fund shares are not guaranteed
by the United States Government.

                                Money Market Fund

PRINCIPAL Money Market Fund, Inc. seeks as high a level of income available from
short-term securities as is considered consistent with preservation of principal
and  maintenance  of liquidity by investing  all of its assets in a portfolio of
money market instruments.

     An investment in the Money Market fund is neither insured nor guaranteed by
the U.S.  Government.  There can be no assurance  the Money Market Funds will be
able to maintain a stable net asset value of $1.00 per share.

     This Prospectus concisely states information about the Principal Funds that
an investor ought to know before  investing.  It should be read and retained for
future reference.

     Additional  information  about the Funds has been filed with the Securities
and Exchange  Commission,  including a document  called  Statement of Additional
Information,  dated May 1, 1997.  The  Statement of  Additional  Information  is
incorporated  by  reference  into this  Prospectus.  A copy of the  Statement of
Additional Information can be obtained free of charge by writing or telephoning:

                             Principal Mutual Funds
                          The Principal Financial Group
                              Des Moines, IA 50392
                            Telephone 1-800-247-4123


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

                   The Date of this Prospectus is May 1, 1997.

                                TABLE OF CONTENTS

                                                                        Page
Summary  ..............................................................    3
Financial Highlights...................................................    5
Investment Objectives, Policies and Restrictions.......................   10
Certain Investment Policies and Restrictions...........................   16
Manager and Sub-Advisor  ..............................................   19
Duties Performed by the Manager and Sub-Advisor........................   20
Managers' Comments.....................................................   21
Determination of Net Asset Value of Fund Shares........................   25
Performance Calculation................................................   26
Income Dividends, Distributions and Tax Status.........................   27
Eligible Purchasers and Purchase of Shares.............................   28
Shareholder Rights ....................................................   28
Redemption of Shares...................................................   29
Additional Information.................................................   30

     This  Prospectus does not constitute an offer to sell, or a solicitation of
an offer to buy, the securities of any of the Funds in any jurisdiction in which
such sale,  offer to sell, or solicitation  may not be lawfully made. No dealer,
salesperson,  or other person has been  authorized to give any information or to
make any  representations,  other than those  contained in this  Prospectus,  in
connection with the offer contained in this  Prospectus,  and, if given or made,
such other information or representations must not be relied upon as having been
authorized by the Funds or the Funds' Manager.

SUMMARY

     The following summarized information should be read in conjunction with the
detailed information appearing elsewhere in this Prospectus.

     The  Principal  Funds are  separately  incorporated,  open-end  diversified
management investment companies.

Who may purchase shares of the Funds?

     Shares of the Funds are  available  only to Eligible  Purchasers  which are
limited to: (a) separate  accounts of Principal Mutual Life Insurance Company or
of other insurance companies; (b) Principal Mutual Life Insurance Company or any
subsidiary or affiliate thereof; (c) trustees or other managers of any qualified
profit  sharing,  incentive or bonus plan  established by Principal  Mutual Life
Insurance  Company or any  subsidiary or affiliate  thereof for the employees of
such  company,  subsidiary  or  affiliate.  The Board of  Directors of each Fund
reserves the right to broaden or limit the designation of Eligible Purchasers.

What do the Funds offer investors?

     Professional Investment Management: Experienced securities analysts provide
each Fund with professional investment management.

     Diversification: Each Fund will diversify by investing in securities issued
by a number of issuers doing business in a variety of industries  and/or located
in different geographical regions. Diversification reduces investment risk.

     Economies of Scale: Pooling individual shareholder's  investments in any of
the Funds creates administrative efficiencies.

     Redeemability:  Upon  request each Fund will redeem its shares and promptly
pay the  investor  the  current  net asset  value of the  shares  redeemed.  See
"Redemption of Shares."

What are the Funds' investment objectives?

                              Growth-Oriented Funds

     The  investment  objective  of Principal  Balanced  Fund,  Inc.  (sometimes
referred  to as the  Balanced  Fund)  is to seek  to  generate  a  total  return
consisting of current income and capital  appreciation while assuming reasonable
risks in furtherance of this objective.

     The primary  investment  objective of Principal Capital  Accumulation Fund,
Inc.  (sometimes  referred to as the  Capital  Accumulation  Fund) is  long-term
capital  appreciation  and its  secondary  investment  objective  is  growth  of
investment income.  The Fund seeks to achieve its investment  objectives through
the  purchase  primarily  of  common  stocks,  but the Fund may  invest in other
securities.

     The investment objective of Principal Emerging Growth Fund, Inc. (sometimes
referred to as the Emerging Growth Fund) is to achieve  capital  appreciation by
investing  primarily  in  securities  of  emerging  and  other   growth-oriented
companies.

     The investment objective of Principal Growth Fund, Inc. (sometimes referred
to as the Growth  Fund) is growth of  capital.  The Fund  seeks to  achieve  its
objective  through the  purchase  primarily of common  stocks,  but the Fund may
invest in other securities.

     The investment  objective of Principal World Fund, Inc. (sometimes referred
to as the World Fund) is to seek  long-term  growth of capital by investing in a
portfolio of equity securities domiciled in any of the nations of the world.

                              Income-Oriented Funds

     The investment  objective of Principal Bond Fund, Inc.  (sometimes referred
to as the Bond Fund) is to  provide  as high a level of income as is  consistent
with preservation of capital and prudent investment risk.

     The investment  objective of Principal  Government  Securities  Fund,  Inc.
(sometimes  referred  to as the  Government  Securities  Fund) is to seek a high
level of current  income,  liquidity and safety of principal.  The Fund seeks to
achieve its objective  through the purchase of obligations  issued or guaranteed
by the United States  Government  or its  agencies,  with emphasis on Government
National Mortgage Association  Certificates ("GNMA  Certificates").  Fund shares
are not guaranteed by the United States Government.

                                Money Market Fund

     The investment  objective of Principal Money Market Fund,  Inc.  (sometimes
referred  to as the  Money  Market  Fund) is to seek as high a level of  current
income  available from  short-term  securities as is considered  consistent with
preservation  of principal and  maintenance of liquidity by investing all of its
assets in a portfolio of money market instruments.

     There can be no  assurance  that the  investment  objectives  of any of the
Funds will be realized. See "Investment Objectives, Policies and Restrictions."

Who serves as Manager for the Funds?

     Princor  Management  Corporation,   a  corporation  organized  in  1969  by
Principal Mutual Life Insurance  Company,  is the Manager for each of the Funds.
It is also the dividend  disbursing and transfer agent for the Principal  Funds.
In order to provide  investment  advisory services for the Balanced,  Growth and
World  Funds the Manager  has  executed  sub-advisory  agreements  with  Invista
Capital  Management,  Inc.  ("Invista"  or  "Sub-Advisor").   See  "Manager  and
Sub-Advisor."

What fees and expenses apply to ownership of shares of the Funds?

     The following  table  depicts fees and expenses  applicable to the purchase
and ownership of shares of each of the Funds.

                         ANNUAL FUND OPERATING EXPENSES
                     (As a Percentage of Average Net Assets)

                                 Management          Other       Total Operating
             Fund                    Fee           Expenses         Expenses
 Balanced Fund                       .60             .03               .63
 Bond Fund                           .50             .03               .53
 Capital Accumulation Fund           .48             .01               .49
 Emerging Growth Fund                .64             .02               .66
 Government Securities Fund          .50             .02               .52
 Growth Fund                         .50             .02               .52
 Money Market Fund                   .50             .06               .56
 World Fund                          .75             .15               .90

                                     EXAMPLE

     You would pay the following expenses on a $1,000  investment,  assuming (1)
     5% annual return and (2) redemption at the end of each time period:

                                             Period (in years)
                               _____________________________________________
               Fund              1            3            5            10

   Balanced Fund                $6           $20          $35           $79
   Bond Fund                    $5           $17          $30           $66
   Capital Accumulation Fund    $5           $16          $27           $62
   Emerging Growth Fund         $7           $21          $37           $82
   Government Securities Fund   $5           $17          $29           $65
   Growth Fund                  $5           $17          $29           $65
   Money Market Fund            $6           $18          $31           $70
   World Fund                   $9           $29          $50          $111

     This Example is based on the Annual Fund  Operating  expenses for each Fund
     described above.  Please remember that the Example should not be considered
     a representation of past or future expenses and that actual expenses may be
     greater or less than shown.

     The purpose of the above table is to assist the  investor in  understanding
the  various  expenses  that an  investor  in the Funds  will bear  directly  or
indirectly. See "Duties Performed by the Manager and Sub-Advisor."

FINANCIAL HIGHLIGHTS

     The following financial  highlights for the periods ended December 31, 1996
and prior thereto are derived from financial  statements which have been audited
by Ernst & Young LLP, independent  auditors,  whose report has been incorporated
by reference herein. The financial highlights should be read in conjunction with
the  financial  statements,  related  notes,  and  other  financial  information
incorporated by reference herein.  Audited financial  statements may be obtained
by shareholders, without charge, by telephoning 1-800-451-5447.

<TABLE>
<CAPTION>
                                                      Income from
                                                  Investment Operations                          Less Distributions                 
                                           ___________________________________  ____________________________________________________
                                                       Net Realized
                                                            and                                                                     
                                 Net Asset              Unrealized    Total      Dividends                  Excess                  
                                 Value at      Net         Gain       from       from Net  Distributions Distributions              
                                 Beginning Investment    (Loss) on  Investment  Investment     from          from         Total     
                                 of Period   Income     Investments Operations    Income   Capital Gains Capital Gains Distributions
Principal Balanced 
Fund, Inc.(a)
  Year Ended December 31,
<S>                                <C>       <C>         <C>          <C>         <C>          <C>          <C>          <C>    
   1996                            $13.97    $  .40      $ 1.41       $1.81       $(.40)       $(.94)       $ --         $(1.34)
   1995                             11.95       .45        2.44        2.89        (.45)        (.42)         --           (.87)
   1994                             12.77       .37        (.64)       (.27)       (.37)        (.18)         --           (.55)
   1993                             12.58       .42         .95        1.37        (.42)        (.76)         --          (1.18)
  Six Months Ended                                                                                                   
   December 31, 1992(d)             12.93       .23         .75         .98         (.47)       (.86)         --          (1.33)
  Year Ended June 30,                                                                                                
   1992                             11.33       .47        1.61        2.08        (.48)        --            --           (.48)
   1991                             10.79       .54         .59        1.13        (.57)        (.02)         --           (.59)
   1990                             11.89       .60        (.48)        .12        (.63)        (.59)         --          (1.22)
   1989                             11.75       .62         .30         .92        (.55)        (.23)         --           (.78)
  Period Ended June 30,                                                                                              
   1988(e)                          10.00       .27        1.51        1.78        (.03)        --            --           (.03)
                                                                                                                     
Principal Bond Fund, Inc.                                                                                            
  Year Ended December 31,                                                                                            
   1996                             11.73       .68        (.40)        .28        (.68)        --            --           (.68)
   1995                             10.12       .62        1.62        2.24        (.63)        --            --           (.63)
   1994                             11.16       .72       (1.04)       (.32)       (.72)        --            --           (.72)
   1993                             10.77       .88         .38        1.26        (.87)        --            --           (.87)
  Six Months Ended                                                                                                   
   December 31, 1992(d)             11.08       .45         .13         .58        (.89)        --            --           (.89)
  Year Ended June 30,                                                                                                
   1992                             10.64       .91         .46        1.37        (.93)        --            --           (.93)
   1991                             10.72       .94        (.06)        .88        (.96)        --            --           (.96)
   1990                             10.92       .95        (.21)        .74        (.94)        --            --           (.94)
   1989                             10.68      1.15         .17        1.32        (.96)        (.12)         --          (1.08)
  Period Ended June 30,                                                                                              
   1988(e)                          10.00       .32         .40         .72        (.04)        --            --           (.04)
                                                                                                                     
Principal Capital                                                                                                    
Accumulation Fund, Inc.                                                                                              
  Year Ended December 31,                                                                                            
   1996                             27.80       .57        5.82        6.39        (.58)       (3.77)         --          (4.35)
   1995                             23.44       .60        6.69        7.29        (.60)       (2.33)         --          (2.93)
   1994                             24.61       .62        (.49)        .13        (.61)        (.69)         --          (1.30)
   1993                             25.19       .61        1.32        1.93        (.60)       (1.91)         --          (2.51)
  Six Months Ended                                                                                                   
   December 31, 1992(d)             26.03       .31        1.84        2.15        (.64)       (2.35)         --          (2.99)
  Year Ended June 30,                                                                                                
   1992                             23.35       .65        2.70        3.35        (.67)        --            --           (.67)
   1991                             22.48       .74        1.22        1.96        (.79)        (.30)         --          (1.09)
   1990                             23.63       .79         .14         .93        (.81)       (1.27)         --          (2.08)
   1989                             23.23       .77        1.32        2.09        (.68)       (1.01)         --          (1.69)
   1988                             27.51       .60       (1.50)       (.90)       (.69)       (2.69)         --          (3.38)
   1987                             25.48       .40        4.46        4.86        (.50)       (2.33)         --          (2.83)
                                                                                                                     
Principal Emerging Growth                                                                                            
Fund, Inc. (f)                                                                                                       
  Year Ended December 31,                                                                                            
   1996                             25.33       .22        5.07        5.29        (.22)        (.66)         --           (.88)
   1995                             19.97       .22        5.57        5.79        (.22)        (.21)         --           (.43)
   1994                             20.79       .14         .03         .17        (.14)        (.85)         --           (.99)
   1993                             18.91       .17        3.47        3.64        (.17)       (1.59)         --          (1.76)
  Six Months Ended                                                                                                   
   December 31, 1992(d)             15.97       .10        3.09        3.19        (.21)        (.04)         --           (.25)
  Year Ended June 30,                                                                                                
   1992                             13.93       .21        2.04        2.25        (.21)         --           --           (.21)
   1991                             14.25       .20         .50         .70        (.23)        (.79)         --          (1.02)
   1990                             13.35       .24         .87        1.11        (.20)        (.01)         --           (.21)
   1989                             12.85       .16        1.35        1.51        (.11)        (.90)         --          (1.01)
  Period Ended June 30,                                                                                              
   1988(e)                          10.00       .05        2.83        2.88        (.03)         --           --           (.03)
                                                                                                                   
</TABLE>

<TABLE>
<CAPTION>
                                                                            Ratios/Supplemental Data                         
                                                            ______________________________________________________     
                                                                                                                       
                                                                                             Ratio of Net                          
                                    Net Asset                                 Ratio of     Investment                          
                                    Value at                Net Assets at   Expenses to     Income to    Portfolio     Average
                                      End of      Total     End of Period      Average       Average     Turnover    Commission
                                     Period      Return    (in thousands)    Net Assets    Net Assets      Rate         Rate   
Principal Balanced                    
Fund, Inc.(a)                         
  Year Ended December 31,             
<S>                                  <C>          <C>        <C>               <C>            <C>          <C>         <C>      
   1996                              $14.44       13.13%     $  93,158         .63%           3.45%        22.6%       $.0417   
   1995                               13.97       24.58%        45,403         .66%           4.12%        25.7%         N/A    
   1994                               11.95       (2.09)%       25,043         .69%           3.42%        31.5%         N/A    
   1993                               12.77       11.06%        21,399         .69%           3.30%        15.8%         N/A    
  Six Months Ended                                                                                                              
   December 31, 1992(d)               12.58        8.00%(b)     18,842         .73%(c)        3.71%(c)     38.4%(c)      N/A    
  Year Ended June 30,                                                                                                           
   1992                               12.93       18.78%        17,344         .72%           3.80%        26.6%         N/A    
   1991                               11.33       11.36%        14,555         .73%           5.27%        27.1%         N/A    
   1990                               10.79         .87%        13,016         .74%           5.52%        33.1%         N/A    
   1989                               11.89        8.55%        12,751         .74%           5.55%        29.3%         N/A    
  Period Ended June 30,                                                                                                         
   1988(e)                            11.75       17.70%(b)     11,469         .80%(c)        4.96%(c)     41.7%(c)      N/A    
                                                                                                                                
Principal Bond Fund, Inc.                                                                                                       
  Year Ended December 31,                                                                                                       
   1996                               11.33        2.36%        63,387         .53%           7.00%         1.7%         N/A    
   1995                               11.73       22.17%        35,878         .56%           7.28%         5.9%         N/A    
   1994                               10.12       (2.90)%       17,108         .58%           7.86%        18.2%         N/A    
   1993                               11.16       11.67%        14,387         .59%           7.57%        14.0%         N/A    
  Six Months Ended                                                                                                              
   December 31, 1992(d)               10.77        5.33%(b)     12,790         .62%(c)        8.10%(c)      6.7%(c)      N/A    
  Year Ended June 30,                                                                                                           
   1992                               11.08       13.57%        12,024         .62%           8.47%         6.1%         N/A    
   1991                               10.64        8.94%        10,552         .63%           9.17%         2.7%         N/A    
   1990                               10.72        7.15%         9,658         .64%           9.09%         0.0%         N/A    
   1989                               10.92       13.51%         9,007         .64%           9.18%        12.2%         N/A    
  Period Ended June 30,                                                                                                         
   1988(e)                            10.68        6.06%(b)     17,598         .58%(c)        8.11%(c)     68.8%(c)      N/A    
                                                                                                                                
Principal Capital                                                                                                               
Accumulation Fund, Inc.                                                                                                         
  Year Ended December 31,                                                                                                       
   1996                               29.84       23.50%       205,019         .49%           2.06%        48.5%        .0426   
   1995                               27.80       31.91%       135,640         .51%           2.25%        49.2%         N/A    
   1994                               23.44         .49%       120,572         .51%           2.36%        44.5%         N/A    
   1993                               24.61        7.79%       128,515         .51%           2.49%        25.8%         N/A    
  Six Months Ended                                                                                                              
   December 31, 1992(d)               25.19        8.81%(b)    105,355         .55%(c)        2.56%(c)     39.7%(c)      N/A    
  Year Ended June 30,                                                                                                           
   1992                               26.03       14.53%        94,596         .54%           2.65%        34.8%         N/A    
   1991                               23.35        9.46%        76,537         .53%           3.53%        14.0%         N/A    
   1990                               22.48        3.94%        74,008         .56%           3.56%        30.2%         N/A    
   1989                               23.63       10.02%        68,132         .57%           3.53%        23.5%         N/A    
   1988                               23.23       (2.67)%       62,696         .60%           2.76%        26.7%         N/A    
   1987                               27.51       22.17%        57,478         .63%           1.99%        16.1%         N/A    
                                                                                                                                
Principal Emerging Growth                                                                                                       
Fund, Inc. (f)                                                                                                                  
  Year Ended December 31,                                                                                                       
   1996                               29.74       21.11%       137,161         .66%           1.07%         8.8%        .0379   
   1995                               25.33       29.01%        58,520         .70%           1.23%        13.1%         N/A    
   1994                               19.97         .78%        23,912         .74%           1.15%        12.0%         N/A    
   1993                               20.79       19.28%        12,188         .78%            .89%        22.4%         N/A    
  Six Months Ended                                                                                                              
   December 31, 1992(d)               18.91       20.12%(b)      9,693         .81%(c)        1.24%(c)      8.6%(c)      N/A    
  Year Ended June 30,                                                                                                           
   1992                               15.97       16.19%         7,829         .82%           1.33%        10.1%         N/A    
   1991                               13.93        5.72%         6,579         .89%           1.70%        11.1%         N/A    
   1990                               14.25        8.32%         6,067         .88%           1.74%        17.9%         N/A    
   1989                               13.35       13.08%         5,509         .90%           1.31%        21.4%         N/A  
  Period Ended June 30,                                                                                                       
   1988(e)                            12.85       28.72%(b)      4,857         .94%(c)         .64%(c)      4.6%(c)      N/A  
</TABLE>
                                                                     
Notes to financial highlights              

(a)  Effective May 1, 1994, the name of Principal Managed Fund, Inc. was changed
     to Principal Balanced Fund, Inc.

(b)  Total return amounts have not been annualized.

(c)  Computed on an annualized basis.

(d)  Effective July 1, 1992 the fund changed its fiscal year end from June 30 to
     December 31.

(e)  Period  from  December  18,  1987,  date shares  first  offered to eligible
     purchasers,  through June 30, 1988. Net investment income  aggregating $.01
     per share for the period  from the  initial  purchase of shares on December
     10,  1987  through  December  17,  1987 was  recognized,  all of which  was
     distributed to the Fund's sole stockholder, Principal Mutual Life Insurance
     Company.  This  represented  activity  of the  fund  prior  to the  initial
     offering of shares to eligible purchasers.

(f)  Effective May 1, 1992, the name of Principal  Aggressive  Growth Fund, Inc.
     was changed to Principal Emerging Growth Fund, Inc.

<TABLE>
<CAPTION>
                                                      Income from
                                                  Investment Operations                          Less Distributions                 
                                           ___________________________________  ____________________________________________________
                                                       Net Realized
                                                            and                                                                     
                                 Net Asset              Unrealized    Total      Dividends                  Excess                  
                                 Value at      Net         Gain       from       from Net  Distributions Distributions              
                                 Beginning Investment    (Loss) on  Investment  Investment     from          from         Total     
                                 of Period   Income     Investments Operations    Income   Capital Gains Capital Gains Distributions
Principal Government
Securities Fund, Inc.
  Year Ended December 31,
<S>                                <C>         <C>     <C>          <C>           <C>          <C>          <C>         <C>       
   1996                            $10.55      $.59    $  (.24)     $  .35        $(.59)       $ --         $  --       $  (.59)  
   1995                              9.38       .60       1.18        1.78         (.61)         --            --          (.61)  
   1994                             10.61       .76      (1.24)       (.48)        (.75)         --            --          (.75)  
   1993                             10.28       .71        .33        1.04         (.71)         --            --          (.71)  
  Six Months Ended                                                                                                  
   December 31, 1992(a)             10.93       .40        .04         .44         (.78)         --           (.31)       (1.09)  
  Year Ended June 30,                                                                                               
   1992                             10.24       .80        .71        1.51         (.81)         --           (.01)        (.82)  
   1991                             10.05       .80        .24        1.04         (.81)         --           (.04)        (.85)  
   1990                             10.05       .78         --         .78         (.78)         --            --          (.78)  
   1989                              9.37       .80        .34        1.14         (.46)         --            --          (.46)  
   1988                              9.47       .78       (.09)        .69         (.79)         --            --          (.79)  
  Period Ended June 30,                                                                                             
   1987(d)                          10.00       .18       (.59)       (.41)        (.12)         --            --          (.12)  
                                                                                                                    
Principal Growth Fund, Inc.                                                                                         
  Year Ended December 31,                                                                                           
   1996                             12.43       .16       1.39        1.55         (.16)        (.03)          --          (.19)  
   1995                             10.10       .17       2.42        2.59         (.17)         --           (.09)        (.26)  
  Period Ended December 31,                                                                                         
   1994(e)                           9.60       .07        .51         .58         (.08)         --            --          (.08)  
                                                                                                                    
Principal Money Market                                                                                              
Fund, Inc.                                                                                                          
  Year Ended December 31,                                                                                           
   1996                              1.000      .049        --         .049        (.049)        --            --          (.049) 
   1995                              1.000      .054        --         .054        (.054)        --            --          (.054) 
   1994                              1.000      .037        --         .037        (.037)        --            --          (.037) 
   1993                              1.000      .027        --         .027        (.027)        --            --          (.027) 
  Six Months Ended                                                                                                  
   December 31, 1992(a)              1.000      .016        --         .016        (.016)        --            --          (.016) 
  Year Ended June 30,                                                                                               
   1992                              1.000      .046        --         .046        (.046)        --            --          (.046) 
   1991                              1.000      .070        --         .070        (.070)        --            --          (.070) 
   1990                              1.000      .077        --         .077        (.077)        --            --          (.077) 
   1989                              1.000      .083        --         .083        (.083)        --            --          (.083) 
   1988                              1.000      .064        --         .064        (.064)        --            --          (.064) 
   1987                              1.000      .057        --         .057        (.057)        --            --          (.057) 
                                                                                                                    
Principal World Fund, Inc.                                                                                          
  Year Ended December 31,                                                                                           
   1996                             10.72       .22       2.46        2.68         (.22)        (.16)          --          (.38)  
   1995                              9.56       .19       1.16        1.35         (.18)         --           (.01)        (.19)  
  Period Ended December 31,                                                                                         
   1994(e)                           9.94       .03       (.33)       (.30)        (.05)        (.02)         (.01)        (.08)  
</TABLE>
                                              
<TABLE>
<CAPTION>
                                                                            Ratios/Supplemental Data                         
                                                            ______________________________________________________     
                                                                                                                       
                                                                                             Ratio of Net                      
                                    Net Asset                                 Ratio of     Investment                          
                                    Value at                Net Assets at   Expenses to     Income to    Portfolio     Average
                                      End of      Total     End of Period      Average       Average     Turnover    Commission
                                     Period      Return    (in thousands)    Net Assets    Net Assets      Rate         Rate   
Principal Government            
Securities Fund, Inc.           
  Year Ended December 31,       
<S>                                  <C>          <C>          <C>             <C>            <C>          <C>          <C>      
   1996                              $10.31       3.35%        $85,100         .52%           6.46%         8.4%         N/A   
   1995                               10.55      19.07%         50,079         .55%           6.73%         9.8%         N/A   
   1994                                9.38      (4.53)%        36,121         .56%           7.05%        23.2%         N/A   
   1993                               10.61      10.07%         36,659         .55%           7.07%        20.4%         N/A   
  Six Months Ended                                                                                                             
   December 31, 1992(a)               10.28       4.10%(b)      31,760         .59%(c)        7.35%(c)     34.5%(c)      N/A   
  Year Ended June 30,                                                                                                          
   1992                               10.93      15.34%         33,022         .58%           7.84%        38.9%         N/A   
   1991                               10.24      10.94%         26,021         .59%           8.31%         4.2%         N/A   
   1990                               10.05       8.16%         21,488         .61%           8.48%        18.7%         N/A   
   1989                               10.05      12.61%         15,890         .63%           8.68%         3.7%         N/A   
   1988                                9.37       7.69%         12,902         .66%           8.47%         2.7%         N/A   
  Period Ended June 30,                                                                                                        
   1987(d)                             9.47       (.94)%(b)     10,778         .64%(c)        8.50%(c)      0.2%(c)      N/A   
                                                                                                                               
Principal Growth Fund, Inc.                                                                                                    
  Year Ended December 31,                                                                                                      
   1996                               13.79      12.51%         99,612         .52%           1.61%         2.0%$       .0401  
   1995                               12.43      25.62%         42,708         .58%           2.08%         6.9%         N/A   
  Period Ended December 31,                                                                                                    
   1994(e)                            10.10       5.42%(b)      13,086         .75%(c)        2.39%(c)      0.9%(c)      N/A   
                                                                                                                               
Principal Money Market                                                                                                         
Fund, Inc.                                                                                                                     
  Year Ended December 31,                                                                                                      
   1996                                1.000      5.07%         46,244         .56%           5.00%           N/A        N/A   
   1995                                1.000      5.59%         32,670         .58%           5.32%           N/A        N/A   
   1994                                1.000      3.76%         29,372         .60%           3.81%           N/A        N/A   
   1993                                1.000      2.69%         22,753         .60%           2.64%           N/A        N/A   
  Six Months Ended                                                                                                             
   December 31, 1992(a)                1.000      1.54%(b)      27,680         .59%(c)        3.10%(c)        N/A        N/A   
  Year Ended June 30,                                                                                                          
   1992                                1.000      4.64%         25,194         .57%           4.54%           N/A        N/A   
   1991                                1.000      7.20%         26,509         .56%           6.94%           N/A        N/A   
   1990                                1.000      8.37%         26,588         .57%           8.05%           N/A        N/A   
   1989                                1.000      8.59%         20,707         .61%           8.40%           N/A        N/A   
   1988                                1.000      6.61%         14,571         .64%           6.39%           N/A        N/A   
   1987                                1.000      5.78%         11,902         .65%           5.68%           N/A        N/A   
                                                                                                                               
Principal World Fund, Inc.                                                                                                     
  Year Ended December 31,                                                                                                      
   1996                               13.02      25.09%         71,682         .90%           2.28%        12.5%        .0120  
   1995                               10.72      14.17%         30,566         .95%           2.26%        15.6%         N/A   
  Period Ended December 31,                                                                                                    
   1994(e)                             9.56      (3.37)%(b)     13,746        1.24%(c)        1.31%(c)     14.4%(c)      N/A   
</TABLE>
                                                              
Notes to financial highlights   

(a)  Effective July 1, 1992 the fund changed its fiscal year end from June 30 to
     December 31.

(b)  Total return amounts have not been annualized.

(c)  Computed on an annualized basis.

(d)  Period from April 9, 1987, date shares first offered to the public, through
     June 30, 1987. Net investment  income,  aggregating  $.01 per share for the
     period  from the initial  purchase  of shares on October  31, 1987  through
     December  17,  1987 was  recognized,  all of which was  distributed  to the
     Fund's sole  stockholder,  Principal  Mutual Life Insurance  Company.  This
     represented activity of the Fund prior to the initial offering of shares to
     eligible purchasers.

(e)  Period from May 1, 1994,  date shares first offered to the public,  through
     December 31, 1994. Net investment  income,  aggregating  $.01 per share for
     Principal  Growth Fund,  Inc. and $.04 per share for Principal  World Fund,
     Inc.  for the period from the initial  purchase of shares on March 23, 1994
     through April 30, 1994, was  recognized,  none of which was  distributed to
     the sole stockholder,  Principal Mutual Life Insurance Company,  during the
     period. Additionally, Principal Growth Fund, Inc. and Principal World Fund,
     Inc. incurred  unrealized losses on investments of $.41 and $.10 per share,
     respectively,   during  the  initial  interim  period.   This   represented
     activities  of each  fund  prior to the  initial  public  offering  of fund
     shares.

INVESTMENT OBJECTIVES, POLICIES AND RESTRICTIONS

     The investment  objectives  and policies of each Fund are described  below.
There can be no assurance that the objectives of the Funds will be realized.

GROWTH-ORIENTED FUNDS

     The  Principal  Funds  currently  include  four Funds  which  seek  capital
appreciation  through  investments  in  equity  securities   (Principal  Capital
Accumulation  Fund,  Principal  Emerging Growth Fund,  Principal Growth Fund and
Principal  World  Fund)  and one  Fund  which  seeks a total  investment  return
including both capital appreciation and income through investments in equity and
debt securities  (Principal  Balanced Fund).  These five Funds are  collectively
referred to as the Growth-Oriented Funds.

     The  Growth-Oriented  Funds may invest in the following equity  securities:
common stocks;  preferred  stocks and debt securities that are convertible  into
common  stock,  that carry  rights or warrants to purchase  common stock or that
carry rights to participate  in earnings;  rights or warrants to subscribe to or
purchase any of the foregoing securities; and American Depositary Receipts based
on any of the foregoing securities.  The Capital Accumulation,  Emerging Growth,
Growth and World Funds will seek to be fully invested under normal conditions in
equity securities.  When, in the opinion of the Manager or Sub-Advisor,  current
market or economic conditions warrant, a Growth-Oriented  Fund may for temporary
defensive  purposes  place all or a portion of its assets in cash,  on which the
Fund would earn no income,  cash  equivalents,  bank  certificates  of  deposit,
bankers acceptances,  repurchase agreements,  commercial paper, commercial paper
master notes which are floating rate debt instruments  without a fixed maturity,
United States Government  securities,  and preferred stocks and debt securities,
whether  or not  convertible  into  or  carrying  rights  for  common  stock.  A
Growth-Oriented  Fund may also maintain reasonable amounts in cash or short-term
debt  securities  for daily cash  management  purposes or pending  selection  of
particular long-term investments.

Principal Balanced Fund

     The investment  objective of Principal Balanced Fund is to generate a total
return  consisting of current  income and capital  appreciation  while  assuming
reasonable  risks  in  furtherance  of  the  investment   objective.   The  term
"reasonable  risks" refers to investment  decisions  that in the judgment of the
Sub-Advisor, Invista, do not present a greater than normal risk of loss in light
of current or  anticipated  future  market and  economic  conditions,  trends in
yields and interest rates, and fiscal and monetary policies.

     In seeking to achieve the investment objective,  the Fund invests primarily
in growth and income-oriented  common stocks (including  securities  convertible
into common stocks),  corporate bonds and debentures and short-term money market
instruments.  The Fund may also invest in other equity  securities,  and in debt
securities issued or guaranteed by the United States Government and its agencies
or  instrumentalities.  The Fund seeks to generate real (inflation  plus) growth
during  favorable  investment  periods  and may  emphasize  income  and  capital
preservation  strategies during uncertain  investment  periods.  The Sub-Advisor
will seek to minimize declines in the net asset value per share. However,  there
is no guarantee that the Sub-Advisor will be successful in achieving this goal.

     The portions of the Fund's total assets invested in equity securities, debt
securities  and  short-term  money market  instruments  are not fixed,  although
ordinarily  40% to 70% of the  Fund's  portfolio  will  be  invested  in  equity
securities with the balance of the portfolio  invested in debt  securities.  The
investment  mix will vary from time to time  depending  upon the judgment of the
Sub-Advisor as to general market and economic  conditions,  trends in investment
yields and interest rates and changes in fiscal or monetary policies.

     The Fund may  invest  in all  types  of  common  stocks  and  other  equity
investments, without regard to any objective investment criteria such as size of
the issue or issuer, exchange listing or seasoning.  The Fund may invest in both
exchange-listed and  over-the-counter  securities,  in small or large companies,
and in well-established or unseasoned companies. Also, the Fund's investments in
corporate  bonds and debentures and money market  instruments are not restricted
by credit ratings or other objective investment criteria, except with respect to
bank  certificates  of  deposit  as set forth  below.  Some of the fixed  income
securities in which the Fund may invest may be considered to include speculative
characteristics  and the Fund may purchase such  securities  that are in default
but does not currently intend to invest more than 5% of its assets in securities
rated  below  BBB  by   Standard  &  Poor's  or  Baa  by  Moody's.   See  "Below
Investment-Grade  Bonds" for a  discussion  of the risks  associated  with these
securities.  The rating  services'  descriptions of BBB or Baa securities are as
follows:  Moody's Investors  Service,  Inc. Bond Ratings -- Baa: Bonds which are
rated Baa are  considered as medium grade  obligations,  i.e.,  they are neither
highly protected nor poorly secured.  Interest  payments and principal  security
appear adequate for the present but certain  protective  elements may be lacking
or may be  characteristically  unreliable  over any great  length of time.  Such
bonds lack outstanding  investment  characteristics and in fact have speculative
characteristics as well. Standard & Poor's Corporation Bond Ratings -- 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 for debt in  higher-rated  categories.  The Fund will not  concentrate  its
investments in any industry.

     In selecting  common  stocks,  the  Sub-Advisor  seeks  companies  which it
believes have predictable  earnings  increases and which,  based on their future
growth  prospects,  may be currently  undervalued  in the market  place.  During
periods when the  Sub-Advisor  determines that general  economic  conditions are
favorable,  it will  generally  purchase  common  stocks with the  objective  of
long-term  capital  appreciation.  From time to time, and in periods of economic
uncertainty,  the Sub-Advisor may purchase common stocks with the expectation of
price appreciation over a relatively short period of time.

     To achieve its investment  objective,  the Fund may at times  emphasize the
generation of interest  income by investing in short,  medium or long-term  debt
securities.  Investment  in debt  securities  may  also  be made  with a view to
realizing capital appreciation when the Manager believes that declining interest
rates may increase  market  values.  The Fund may also purchase  "deep  discount
bonds," i.e., bonds which are selling at a substantial  discount from their face
amount, with a view to realizing capital appreciation.

     The  short-term  money  market  investments  in which  the Fund may  invest
include the  following:  U.S.  Treasury  bills,  bank  certificates  of deposit,
bankers'  acceptances,  repurchase  agreements,  commercial paper and commercial
paper  master  notes which are floating  rate debt  instruments  without a fixed
maturity.  The Fund will only invest in domestic  bank  certificates  of deposit
issued by banks which are members of the Federal  Reserve System that have total
deposits in excess of $1 billion.

     The  United  States  government  securities  in which  the Fund may  invest
include U.S. Treasury  obligations and obligations of certain agencies,  such as
the Government  National Mortgage  Association,  which are supported by the full
faith and credit of the United  States,  as well as obligations of certain other
Federal agencies or  instrumentalities,  such as the Federal  National  Mortgage
Association,  Federal  Land Banks and the Federal  Farm  Credit  Administration,
which are backed  only by the right of the issuer to borrow  limited  funds from
the U.S.  Treasury,  by the  discretionary  authority of the U.S.  Government to
purchase  such  obligations  or by the credit of the  agency or  instrumentality
itself.

Principal Capital Accumulation Fund

     The primary objective of Principal  Capital  Accumulation Fund is long-term
capital appreciation. A secondary objective is growth of investment income.

     The Fund will invest primarily in common stocks, but it may invest in other
securities.  In making  selections  for the  Fund's  investment  portfolio,  the
Manager will use an approach described broadly as that of fundamental  analysis,
which is discussed in the Statement of Additional Information. In pursuit of the
Fund's investment objectives,  investments will be made in securities which as a
group  appear to offer  long-term  prospects  for  capital  and  income  growth.
Securities  chosen for  investment  may  include  those of  companies  which the
Manager  believes  can  reasonably  be  expected  to share in the  growth of the
nation's economy over the long term.

Principal Emerging Growth Fund

     The  objective  of  Principal  Emerging  Growth Fund is to achieve  capital
appreciation.  The  strategy of this Fund is to invest  primarily  in the common
stocks and securities  (both debt and preferred  stock)  convertible into common
stocks of emerging and other growth-oriented  companies that, in the judgment of
the Manager,  are  responsive  to changes  within the  marketplace  and have the
fundamental  characteristics  to support  growth.  In pursuing its  objective of
capital  appreciation,  the Emerging  Growth Fund may invest,  for any period of
time, in any industry, in any kind of growth-oriented  company,  whether new and
unseasoned or well known and established.

     There  can be, of  course,  no  assurance  that the Fund  will  attain  its
objective.  Investment  in  emerging  and other  growth-oriented  companies  may
involve  greater risk than  investment  in other  companies.  The  securities of
growth-oriented  companies  may be  subject  to more  abrupt or  erratic  market
movements,  and many of them may have limited product lines, markets,  financial
resources or management. Because of these factors and of the length of time that
may be required  for full  development  of the growth  prospects  of some of the
companies  in which the Fund  invests,  the Fund  believes  that its  shares are
suitable  only  for  persons  who  are  prepared  to  experience   above-average
fluctuations  in net asset value,  to assume  above-average  investment  risk in
search  of  above-average  return,  and to  consider  the  Fund  as a  long-term
investment and not as a vehicle for seeking short-term profits.  Moreover, since
the  Fund  will not be  seeking  current  income,  investors  should  not view a
purchase of Fund shares as a complete investment program.

Principal Growth Fund

     The objective of Principal Growth Fund is growth of capital. Realization of
current income will be incidental to the objective of growth of capital.

     The Fund will invest primarily in common stocks, but it may invest in other
equity securities. In making selections for the Fund's investment portfolio, the
Sub-Advisor,  Invista,  will  use an  approach  described  broadly  as  that  of
fundamental  analysis,  which  is  discussed  in  the  Statement  of  Additional
Information. In pursuit of the Fund's investment objective,  investments will be
made in securities which as a group appear to possess potential for appreciation
in market  value.  Common  stocks  chosen for  investment  may include  those of
companies  which have a record of sales and  earnings  growth  that  exceeds the
growth rate of  corporate  profits of the S&P 500 or which offer new products or
new services.  The policy of investing in securities which have a high potential
for  growth of  capital  can mean that the  assets of the Fund may be subject to
greater risk than securities which do not have such potential.

Principal World Fund

     The  investment  objective  of  Principal  World Fund is to seek  long-term
growth of capital  through  investment  in a portfolio of equity  securities  of
companies domiciled in any of the nations of the world. In choosing  investments
in equity securities of foreign and United States corporations, the Sub-Advisor,
Invista, intends to pay particular attention to long-term earnings prospects and
the relationship of then-current prices to such prospects. Short-term trading is
not generally intended,  but occasional  investments may be made for the purpose
of seeking  short-term  or  medium-term  gain.  The Fund expects its  investment
objective to be met over long periods which may include  several  market cycles.
For  a  description  of  certain   investment   risks  associated  with  foreign
securities, see "Foreign Securities."

     For  temporary  defensive  purposes,  the World Fund may invest in the same
kinds of  securities  as the  other  Growth-Oriented  Funds  whether  issued  by
domestic  or  foreign  corporations,   governments,  or  governmental  agencies,
instrumentalities  or political  subdivisions and whether  denominated in United
States dollars or some other currency.

     The Fund  intends that its  investments  normally  will be allocated  among
various  countries.  Although there is no limitation on the percentage of assets
that may be invested in any one country or denominated in any one currency,  the
Fund intends under normal  market  conditions to have at least 65% of its assets
invested in securities issued by corporations of at least five countries, one of
which may be the United States.  Investments  may be made anywhere in the world,
but it is expected that primary  consideration will be given to investing in the
securities  issued  by  corporations  of  Western  Europe,   North  America  and
Australasia (Australia,  Japan and Far East Asia) that have developed economies.
Changes in investments may be made as prospects change for particular countries,
industries or companies.

     The Fund may invest in the securities of other investment companies but may
not  invest  more  than 10% of its  assets  in  securities  of other  investment
companies,  invest more than 5% of its total assets in the securities of any one
investment company, or acquire more than 3% of the outstanding voting securities
of any one investment company except in connection with a merger,  consolidation
or plan of  reorganization.  The Fund's Manager will waive its management fee on
the Fund's assets invested in securities of other open-end investment companies.
The Fund will  generally  invest only in those  investment  companies  that have
investment policies requiring investment in securities  comparable in quality to
those in which the Fund invests.

INCOME-ORIENTED FUNDS

     The Principal Funds currently  include two Funds which seek a high level of
income through investments in fixed-income  securities  (Principal Bond Fund and
Principal   Government   Securities  Fund)  collectively   referred  to  as  the
"Income-Oriented  Funds." An investment in either of the  Income-Oriented  Funds
involves market risks  associated  with movements in interest rates.  The market
value of the  Funds'  investments  will  fluctuate  in  response  to  changes in
interest rates and other factors.  During periods of falling interest rates, the
values  of  outstanding  long-term   fixed-income   securities  generally  rise.
Conversely,  during  periods  of  rising  interest  rates,  the  values  of such
securities  generally  decline.  Changes by recognized  rating agencies in their
ratings of any  fixed-income  security  and in the  ability of an issuer to make
payments  of  interest  and  principal  may  also  affect  the  value  of  these
investments. Changes in the value of portfolio securities will affect the Funds'
net asset  values but will not affect cash income  derived  from the  securities
unless a change results from a failure of an issuer to pay interest or principal
when due. Each Fund's rating  limitations  apply at the time of acquisition of a
security,  and any  subsequent  change in a rating by a rating  service will not
require  elimination of a security from the Fund's  portfolio.  The Statement of
Additional  Information  contains  descriptions of ratings of Moody's  Investors
Service, Inc. ("Moody's") and Standard and Poor's Corporation ("S&P").

Principal Bond Fund

     The  investment  objective of  Principal  Bond Fund is to provide as high a
level of income as is  consistent  with  preservation  of  capital  and  prudent
investment risk.

     In seeking to achieve the investment objective, the Fund will predominantly
invest in marketable fixed-income securities. Investments will be made generally
on a long-term basis, but the Fund may make short-term  investments from time to
time as deemed  prudent by the  Manager.  Longer  maturities  typically  provide
better yields but will subject the Fund to a greater  possibility of substantial
changes in the values of its portfolio securities as interest rates change.

     Under  normal  circumstances,  the Fund  will  invest  at least  65% of its
assets,  exclusive  of cash  items,  in one or more of the  following  kinds  of
securities:  (i) corporate debt  securities and taxable  municipal  obligations,
which at the time of purchase  have an  investment  grade rating within the four
highest grades used by Standard & Poor's  Corporation  (AAA, AA, A or BBB) or by
Moody's Investors Service,  Inc. (Aaa, Aa, A or Baa) or which, if lower-rated or
nonrated,  are comparable in quality in the opinion of the Fund's Manager;  (ii)
similar Canadian corporate, Provincial and Federal Government securities payable
in U.S. funds;  and (iii)  securities  issued or guaranteed by the United States
Government  or its  agencies  or  instrumentalities.  The  balance of the Fund's
assets may be invested in other fixed income securities,  including domestic and
foreign  corporate debt  securities or preferred  stocks,  in common stocks that
provide  returns  that  compare  favorably  with  the  yields  on  fixed  income
investments, and in common stocks acquired upon conversion of debt securities or
preferred  stocks or upon exercise of warrants  acquired with debt securities or
otherwise and foreign government  securities.  The debt securities and preferred
stocks in which the Fund invests may be convertible or nonconvertible.  The Fund
does not intend to purchase debt  securities  rated lower than Ba3 by Moody's or
BB - by S & P (bonds which are judged to have speculative elements; their future
cannot be considered as well-assured).  See "Below Investment-Grade Bonds" for a
discussion of the risks associated with these  securities.  The rating services'
descriptions of BBB or Baa securities are as follows: Moody's Investors Service,
Inc.  Bond Ratings -- Baa:  Bonds which are rated Baa are  considered  as medium
grade  obligations,  i.e., they are neither highly protected nor poorly secured.
Interest  payments and principal  security  appear  adequate for the present but
certain  protective  elements  may  be  lacking  or  may  be  characteristically
unreliable over any great length of time. Such bonds lack outstanding investment
characteristics and in fact have speculative characteristics as well. Standard &
Poor's  Corporation  Bond Ratings -- 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  for  debt in  higher-rated
categories.

     During the year ended  December  31,  1996,  the  percentage  of the Fund's
portfolio  securities  invested in the various  ratings  established  by Moody's
based upon the weighted average ratings of the portfolio, was as follows:

      Moody's Rating                           Portfolio Percentage
           Aaa                                          .18%
           Aa                                           .81%
           A                                          24.05%
           Baa                                        68.04%
           Ba                                          6.92%

     The  above  percentages  for  A  rated  securities  include  .57%,  unrated
securities  which  have  been  determined  by the  Manager  to be of  comparable
quality.

     Cash  equivalents in which the Fund invests  include  corporate  commercial
paper  rated  A-1+,  A-1 or A-2 by  Standard & Poor's or P-1 or P-2 by  Moody's,
unrated commercial paper issued by corporations with outstanding debt securities
rated in the four  highest  grades by  Standard  & Poor's and  Moody's  and bank
certificates  of  deposit  and  bankers'  acceptances  issued or  guaranteed  by
national or state banks and repurchase agreements considered by the Fund to have
investment quality.  Under unusual market or economic  conditions,  the Fund may
for temporary  defense  purposes invest up to 100% of its assets in cash or cash
equivalents.

Principal Government Securities Fund

     The objective of Principal  Government  Securities  Fund is a high level of
current income, liquidity and safety of principal.

     The Fund will  invest in  obligations  issued or  guaranteed  by the United
States  Government  or by its agencies or  instrumentalities  and in  repurchase
agreements   collateralized  by  such  obligations.   Such  securities   include
Government National Mortgage Association  ("GNMA")  Certificates of the modified
pass-through type, Federal National Mortgage Association  ("FNMA")  Obligations,
Federal Home Loan Mortgage Corporation  ("FHLMC")  Certificates and Student Loan
Marketing   Association   ("SLMA")   Certificates  and  other  U.S.   Government
Securities.  GNMA is a  wholly-owned  corporate  instrumentality  of the  United
States whose  securities  and guarantees are backed by the full faith and credit
of  the  United  States.   FNMA,  a  federally   chartered  and  privately-owned
corporation,  FHLMC,  a federal  corporation,  and SLMA, a government  sponsored
stockholder-owned  organization, are instrumentalities of the United States. The
securities  and guarantees of FNMA,  FHLMC and SLMA are not backed,  directly or
indirectly,  by the full  faith and credit of the United  States.  Although  the
Secretary of the Treasury of the United  States has  discretionary  authority to
lend FNMA up to $2.25 billion outstanding at any time, neither the United States
nor any agency thereof is obligated to finance  FNMA's or FHLMC's  operations or
to assist FNMA or FHLMC in any other  manner.  The Fund may maintain  reasonable
amounts of cash or short-term debt securities for daily cash management purposes
or pending selection of particular long-term investments.

     Depending on market conditions,  up to 55% of the assets may be invested in
GNMA  Certificates.  GNMA is a United States Government  corporation  within the
Department   of  Housing   and  Urban   Development.   GNMA   Certificates   are
mortgage-backed securities representing an interest in a pool of mortgage loans.
Such loans are made by lenders such as mortgage  bankers,  insurance  companies,
commercial  banks and  savings  and loan  associations.  Then,  they are  either
insured by the Federal  Housing  Administration  (FHA) or they are guaranteed by
the Veterans  Administration  (VA) or Farmers Home  Administration  (FmHA).  The
lender or other  prospective  issuer creates a specific pool of such  mortgages,
which it submits to GNMA for approval.  After  approval,  a GNMA  Certificate is
typically offered by the issuer to investors through securities dealers.

     GNMA  Certificates  differ from bonds in that the principal is scheduled to
be paid back by the borrower on a monthly basis over the life of the loan rather
than  returned  in  a  lump  sum  at  maturity.   Modified   pass-through   GNMA
certificates,  which  are the only  kind in which the Fund  intends  to  invest,
entitle the holder to receive all interest and  principal  payments  owed on the
mortgages  in the pool  (net of the  issuer  and GNMA fee of .5%  prescribed  by
regulation),  regardless  of whether or not the mortgagor has made such payment.
The timely payment of interest and principal is guaranteed by the full faith and
credit of the United States Government.

     Although the payment of interest and principal is guaranteed, the guarantee
does not extend to the value of a GNMA Certificate or the value of the shares of
the Fund.  The market value of a GNMA  Certificate  typically  will fluctuate to
reflect  changes in prevailing  interest rates. It falls when rates increase (as
does the market value of other debt  securities) and it rises when rates decline
(but it may not rise on a comparable basis with other debt securities because of
its  prepayment  feature),  and,  therefore,  may be more or less  than the face
amount of the GNMA Certificate, which reflects the aggregate principal amount of
the underlying  mortgages.  As a result, the net asset value of Fund shares will
fluctuate as interest rates change.

     Mortgagors may pay off their mortgages at any time. Expected prepayments of
the  mortgages can affect the market value of the GNMA  Certificate,  and actual
prepayments  can  affect  the  return  ultimately  received.  Prepayments,  like
scheduled  payments  of  principal,  are  reinvested  by the Fund at  prevailing
interest  rates  which  may be  less  than  the  rate on the  GNMA  Certificate.
Prepayments  are likely to increase as the interest rate for new mortgages moves
lower than the rate on the GNMA Certificate.  Moreover,  if the GNMA Certificate
had been  purchased  at a premium  above  principal  because  its rate  exceeded
prevailing  rates,  the premium is not  guaranteed and a decline in value to par
may result in a loss of the premium especially in the event of prepayment.

     To the extent deemed appropriate by the Fund's Manager, the Fund intends to
purchase GNMA Certificates directly from Principal Mutual Life Insurance Company
and other  issuers as well as from  securities  dealers.  The Fund will purchase
directly from issuers only if it can obtain a price  advantage by not paying the
commission or mark-up that would be required if the Certificates  were purchased
from a securities dealer.  The Securities and Exchange  Commission has issued an
order under the Investment Company Act of 1940 that permits the Fund to purchase
GNMA Certificates  directly from Principal Mutual Life Insurance Company subject
to certain conditions.

     The FNMA and FHLMC securities in which the Fund invests are very similar to
GNMA  certificates  as described  above but are not guaranteed by the full faith
and credit of the United States but rather by the agency itself.  FNMA and FHLMC
securities are rated Aaa by Moody's and AAA by Standard & Poor's.  These ratings
reflect  the  status  of FNMA  and  FHLMC  as  federal  agencies  as well as the
important role each plays in financing purchases of homes in the U.S.

     Student   Loan   Marketing    Association   is   a   government   sponsored
stockholder-owned  organization  whose goal is to provide liquidity to financial
and  educational  institutions.  SLMA provides  liquidity by purchasing  student
loans,  which are  principally  government  guaranteed  loans  issued  under the
Federal Guaranteed Student Loan Program and the Health Education Assistance Loan
Program.  SLMA  securities  are not  guaranteed by the U.S.  Government  but are
obligations  solely of the  agency.  SLMA  senior  debt issues in which the Fund
invests are rated AAA by Standard & Poor's and Aaa by Moody's.

     There are other  obligations  issued or  guaranteed  by the  United  States
Government   (such  as  U.S.   Treasury   securities)  or  by  its  agencies  or
instrumentalities  that are either supported by the full faith and credit of the
U.S. Treasury or the credit of a particular agency or instrumentality.  Included
in the  latter  category  are  Federal  Home  Loan Bank and Farm  Credit  Banks.
Obligations  not  guaranteed  by the United States  Government  are highly rated
because they are issued by indirect branches of government. Such paper is issued
as needs arise by the agency and is traded regularly in denominations similar to
those in which government obligations are traded.

     The Fund will not engage in the  trading of  securities  for the purpose of
realizing  short-term  profits,  but it will adjust its  portfolio as considered
advisable in view of prevailing or anticipated  market conditions and the Fund's
investment  objective.  Accordingly,  the Fund may sell portfolio  securities in
anticipation  of a rise in interest rates and purchase  securities for inclusion
in its portfolio in anticipation of a decline in interest rates.

     As a hedge  against  changes  in  interest  rates,  the Fund may enter into
contracts with dealers in GNMA Certificates  whereby the Fund agrees to purchase
or sell an  agreed-upon  principal  amount of GNMA  Certificates  at a specified
price on a certain  date.  The Fund may enter into similar  purchase  agreements
with issuers of GNMA  Certificates  other than  Principal  Mutual Life Insurance
Company.  The Fund may also purchase optional delivery standby commitments which
give the Fund the right to sell  particular  GNMA  Certificates  at a  specified
price on a  specified  date.  Failure of the other  party to such a contract  or
commitment  to abide by the terms thereof could result in a loss to the Fund. To
the extent the Fund engages in delayed  delivery  transactions it will do so for
the purpose of acquiring  portfolio  securities  consistent  with its investment
objective  and  policies  and not for the purpose of  investment  leverage or to
speculate on interest rate changes. Liability accrues to the Fund at the time it
becomes  obligated to purchase such  securities,  although  delivery and payment
occur at a later  date.  From the time the Fund  becomes  obligated  to purchase
securities  on a delayed  delivery  basis the Fund has all the  rights and risks
attendant  to the  ownership  of a security.  At the time the Fund enters into a
binding  obligation to purchase such securities,  Fund assets of a dollar amount
sufficient  to  make  payment  for  the  securities  to  be  purchased  will  be
segregated. The availability of liquid assets for this purpose and the effect of
asset  segregation  on the Fund's  ability to meet its current  obligations,  to
honor  requests for  redemption  and to have its  investment  portfolio  managed
properly  will  limit  the  extent  to  which  the Fund may  engage  in  forward
commitment  agreements.  Except as may be imposed by these factors,  there is no
limit on the  percent  of the  Fund's  total  assets  that may be  committed  to
transactions in such agreements.

MONEY MARKET FUND

     The  Principal  Funds  also  include  a Fund  which  invests  primarily  in
short-term  securities,  Principal  Money Market Fund.  Securities  in which the
Money Market Fund will invest may not yield as high a level of current income as
securities  of low  quality  and longer  maturities  which  generally  have less
liquidity, greater market risk and more fluctuation.

     The Money Market Fund will limit its portfolio investments to United States
dollar  denominated  instruments that its board of directors  determines present
minimal  credit  risks  and  which  are at the  time  of  acquisition  "Eligible
Securities" as that term is defined in  regulations  issued under the Investment
Company Act of 1940. Eligible Securities include:

     (1) A  security  with the  remaining  maturity  of 397 days or less that is
         rated (or that has been issued by an issuer that is rated in respect to
         a class of short-term  debt  obligations,  or any security  within that
         class,  that is  comparable in priority and security with the security)
         by a nationally  recognized  statistical rating  organization in one of
         the two highest rating categories for short-term debt obligations; or

     (2) A security at the time of issuance was a long-term  security that has a
         remaining  maturity of 397 calendar days or less,  and whose issuer has
         received from a nationally recognized statistical rating organization a
         rating,  with respect to a class of short-term debt obligations (or any
         security  within  that class) that is now  comparable  in priority  and
         security with the security, in one of the two highest rating categories
         for short-term debt obligations; or

     (3) An  unrated  security  that is of  comparable  quality  to a  security
         meeting the  requirements  of (1) or (2) above,  as  determined by the
         board of directors.

     The Fund will not invest more than 5% of its total assets in the  following
securities:

     (1) Securities  which,  when acquired by the Fund (either initially or upon
         any subsequent  rollover),  are rated below the highest rating category
         for short-term debt obligations;

     (2) Securities which, at the time of issuance were long-term securities but
         when  acquired  by the Fund have a remaining  maturity of 397  calendar
         days or less, if the issuer of such  securities is rated,  with respect
         to a class of comparable short-term debt obligations, below the highest
         rating category for short-term obligations;

     (3) Securities  which are unrated but are determined by the Fund's board of
         directors to be of  comparable  quality to  securities  rated below the
         highest rating category for short-term debt obligations.  The Fund will
         maintain a  dollar-weighted  average  portfolio  maturity of 90 days or
         less.

     The objective of Principal  Money Market Fund is to seek as high a level of
current income available from short-term  securities as is considered consistent
with  preservation  of principal and  maintenance  of liquidity by investing its
assets  in  a  portfolio  of  money  market  instruments.   These  money  market
instruments are U.S. Government  Securities,  U.S. Government Agency Securities,
Bank  Obligations,  Commercial Paper,  Short-term  Corporate Debt and Repurchase
Agreements,  which  are  described  briefly  below  and in  more  detail  in the
Statement of Additional Information.

     U.S. Government  Securities are securities issued or guaranteed by the U.S.
Government, including treasury bills, notes and bonds.

     U.S.  Government Agency Securities are obligations  issued or guaranteed by
agencies or  instrumentalities  of the U.S.  Government whether supported by the
full faith and credit of the U.S. Treasury or only by the credit of a particular
agency or instrumentality.

     Bank  Obligations  consist of  certificates  of deposit which are generally
negotiable  certificates issued against funds deposited in a commercial bank for
a definite period of time and earning a specified return and bankers acceptances
which are time  drafts  drawn on a  commercial  bank by a  borrower,  usually in
connection with international commercial transactions.

     Commercial  Paper is  short-term  promissory  notes issued by  corporations
primarily to finance short-term credit needs.

     Short-term  Corporate Debt consists of notes,  bonds or debentures which at
the time of purchase have one year or less remaining to maturity.

     Repurchase Agreements are transactions under which securities are purchased
from a bank or  securities  dealer with an agreement by the seller to repurchase
the securities at the same price plus interest at a specified  rate.  Generally,
Repurchase  Agreements  are of short  duration,  usually less than a week but on
occasion for longer periods.

     The  Fund  intends  to hold  its  investments  until  maturity,  but may on
occasion trade securities to take advantage of market variations.  Also, revised
valuations  of an  issuer  or  redemptions  may  result  in sales  of  portfolio
investments prior to maturity or at times when such sales might otherwise not be
desirable.  The Fund's right to borrow to facilitate  redemptions may reduce the
need for  such  sales.  It is the  Fund's  policy  to be as  fully  invested  as
reasonably practical at all times to maximize current income.

     Since portfolio assets will consist of short-term instruments,  replacement
of portfolio securities will occur frequently.  However,  since the Fund expects
to usually transact purchases and sales of portfolio  securities with issuers or
dealers  on a net  basis,  it is not  anticipated  that  the  Fund  will pay any
significant  brokerage  commissions.  The Fund is free to dispose  of  portfolio
securities at any time, when changes in  circumstances or conditions make such a
move desirable in light of the investment objective.

     A  shareholder's  rate of return will vary with the general  interest  rate
levels applicable to the money market instruments in which the Fund invests. The
rate of return and the net asset value will be affected by such other factors as
sales  of  portfolio  securities  prior to  maturity  and the  Fund's  operating
expenses.

CERTAIN INVESTMENT POLICIES AND RESTRICTIONS

     Following is a discussion of certain  investment  practices  that the Funds
may use in an effort to achieve their respective investment objectives.

Diversification

     Each Fund is subject to the diversification  requirements of Section 817(h)
of the Internal  Revenue Code (the "Code")  which must be met at the end of each
quarter of the year (or within 30 days  thereafter).  Regulations  issued by the
Secretary  of the Treasury  have the effect of requiring  each Fund to invest no
more than 55% of its total assets in securities of any one issuer,  no more than
70% in the securities of any two issuers,  no more than 80% in the securities of
any three  issuers,  and no more than 90% in the securities of any four issuers.
For this purpose, the United States Treasury and each U.S. Government agency and
instrumentality  is considered to be a separate  issuer.  Thus,  the  Government
Securities Fund intends to invest in U.S. Treasury  securities and in securities
issued by at least four U.S.  Government  agencies or  instrumentalities  in the
amounts necessary to meet those diversification  requirements at the end of each
quarter of the year (or within thirty days thereafter).

     In the event any of the Funds do not meet the diversification  requirements
of Section 817(h) of the Code, the contracts  funded by shares of the Funds will
not be treated as annuities or life  insurance  for Federal  income tax purposes
and the owners of the Funds will be subject to  taxation  on their  share of the
dividends and distributions paid by the Funds.

Foreign Securities

     Each of the following  Principal Funds has adopted investment  restrictions
that limit its investments in foreign securities to the indicated  percentage of
its  assets:  World  Fund - 100%;  Bond and  Capital  Accumulation  Funds - 20%;
Balanced,  Emerging  Growth  and  Growth  Funds  - 10%.  Investment  in  foreign
securities presents certain risks including those resulting from fluctuations in
currency  exchange rates,  revaluation of currencies,  the imposition of foreign
taxes, future political and economic developments including war, expropriations,
nationalization, the possible imposition of currency exchange controls and other
foreign  governmental  laws or  restrictions,  reduced  availability  of  public
information  concerning  issuers,  and the fact  that  foreign  issuers  are not
generally  subject to  uniform  accounting,  auditing  and  financial  reporting
standards or to other regulatory practices and requirements  comparable to those
applicable to domestic issuers. Moreover, securities of many foreign issuers may
be less liquid and their prices more volatile than those of comparable  domestic
issuers.  In  addition,  transactions  in foreign  securities  may be subject to
higher costs, and the time for settlement of transactions in foreign  securities
may be  longer  than  the  settlement  period  for  domestic  issuers.  A Fund's
investment in foreign  securities may also result in higher  custodial costs and
the costs associated with currency conversions.

Currency Contracts

     The World Fund may enter into forward currency contracts,  currency futures
contracts and options  thereon and options on  currencies  for hedging and other
non-speculative  purposes.  A forward  currency  contract  involves a  privately
negotiated  obligation to purchase or sell a specific  currency at a future date
at a price  set at the time of the  contract.  The Fund  will not  enter  into a
transaction to hedge  currency  exposure to an extent greater in effect than the
aggregate  market  value of the  securities  held or to be purchased by the Fund
that are denominated or generally  quoted in or currently  convertible  into the
currency.  When  the  Fund  enters  into a  contract  to buy or  sell a  foreign
currency,  it generally will hold an amount of that currency,  liquid securities
denominated in that currency or a forward  contract for such securities equal to
the Fund's  obligation,  or it will segregate liquid high grade debt obligations
equal to the amount of the Fund's  obligations.  The use of  currency  contracts
involves many of the same risks as transactions in futures contracts and options
as well as the risk of government  action through exchange controls or otherwise
that would restrict the ability of the Fund to deliver or receive currency.

Repurchase Agreements and Securities Loans

     Each of the Funds,  except the Capital  Accumulation  Fund,  may enter into
repurchase   agreements  with,  and  each  of  the  Funds,  except  the  Capital
Accumulation  and Money Market  Funds,  may lend its  portfolio  securities  to,
unaffiliated   broker-dealers   and  other  unaffiliated   qualified   financial
institutions.  These transactions must be fully collateralized at all times, but
involve  some credit risk to the Fund if the other party  should  default on its
obligations,  and the  Fund is  delayed  or  prevented  from  recovering  on the
collateral.  See the Funds'  Statement  of  Additional  Information  for further
information regarding the credit risks associated with repurchase agreements and
the  standards  adopted by each  Fund's  Board of  Directors  to deal with those
risks.  None of the Funds intend either (i) to enter into repurchase  agreements
that mature in more than seven days if any such  investment,  together  with any
other illiquid securities held by the Fund, would amount to more than 10% of its
total assets or (ii) to loan securities in excess of 30% of its total assets.

Forward Commitments

     From time to time,  each of the Funds may  enter  into  forward  commitment
agreements  which call for the Fund to  purchase  or sell a security on a future
date and at a price fixed at the time the Fund enters into the  agreement.  Each
of the Funds may also acquire  rights to sell its  investments to other parties,
either on demand or at specific intervals.

Warrants

     Each of the Funds, except the Money Market and Government Securities Funds,
may invest in warrants up to 5% of its assets,  of which not more than 2% may be
invested  in  warrants  that are not  listed on the New York or  American  Stock
Exchange.  For the World Fund, the 2% limitation also does not apply to warrants
listed on the Toronto Stock Exchange or the Chicago Board Options Exchange.

Borrowing

     As a matter of  fundamental  policy,  each Fund may  borrow  money only for
temporary  or  emergency  purposes.   The  Balanced  Fund,  Bond  Fund,  Capital
Accumulation  Fund and Money  Market Fund may borrow  only from banks.  Further,
each may borrow only in an amount not  exceeding  5% of its  assets,  except the
Capital  Accumulation  Fund which may borrow only in an amount not exceeding the
lesser of (i) 5% of the value of its  assets  less  liabilities  other than such
borrowings, or (ii) 10% of its assets taken at cost at the time the borrowing is
made, and the Money Market Fund which may borrow only in an amount not exceeding
the lesser of (i) 5% of the value of its assets, or (ii) 10% of the value of its
net assets taken at cost at the time the borrowing is made.

Options

     The Balanced Fund, Bond Fund, Emerging Growth Fund,  Government  Securities
Fund,  Growth Fund and World Fund may purchase  covered  spread  options,  which
would give the Fund the right to sell a security  that it owns at a fixed dollar
spread or yield spread in  relationship  to another  security that the Fund does
not own,  but which is used as a benchmark.  These same Funds may also  purchase
and sell financial futures contracts, options on financial futures contracts and
options on securities and securities  indices,  but will not invest more than 5%
of their assets in the purchase of options on securities, securities indices and
financial  futures  contracts  or in initial  margin and  premiums on  financial
futures contracts and options thereon. The Funds may write options on securities
and securities  indices to generate  additional revenue and for hedging purposes
and may enter into  transactions in financial  futures  contracts and options on
those contracts for hedging purposes.

Below Investment Grade Bonds

     Below  investment-grade  bonds are securities rated Ba1 or lower by Moody's
Investors  Service,  Inc.  ("Moody's")  or BB+ or  lower  by  Standard  & Poor's
Corporation   ("S&P")  or  unrated   securities  which  the  Fund's  Manager  or
Sub-Advisor  believes are of comparable quality.  These securities are regarded,
on balance,  as predominantly  speculative with respect to the issuer's capacity
to pay  interest  and to repay  principal  in  accordance  with the terms of the
obligation. The Funds do not intend to invest in securities rated lower than Ba3
by  Moody's  or BB by S&P.  The Bond  Fund may not  invest  more than 35% of its
assets in below investment grade  securities.  The Balanced Fund does not intend
to invest more than 5% of its assets in such securities.

     The rating  services'  descriptions of below  investment  grade  securities
rating categories in which the Funds may normally invest are as follows:

     Moody's Investors Service, Inc. Bond Ratings - Ba: Bonds which are rated Ba
are judged to have  speculative  elements;  their future cannot be considered as
well-assured.  Often the  protection of interest and  principal  payments may be
very  moderate and thereby not well  safeguarded  during both good and bad times
over the future. Uncertainty of position characterizes bonds in this class.

     Moody's may apply  numerical  modifiers,  1, 2 and 3 in each generic rating
classification  from Aa through Ba in its bond  rating  system.  The  modifier 1
indicates  that  the  security  ranks  in the  high  end of its  generic  rating
category;  the  modifier  2  indicates  a  mid-range  ranking;  and a modifier 3
indicates that the issue ranks in the lower end of its generic rating category.

     Standard  & Poor's  Corporation  Bond  Ratings  - BB:  Debt  rated  "BB" is
regarded,  on balance, as predominantly  speculative with respect to capacity to
pay interest and repay principal in accordance with the terms of the obligation.
"BB"  indicates  the lowest degree of  speculation.  While such debt will likely
have some quality and protective characteristics,  these are outweighed by large
uncertainties or major risk exposures to adverse conditions.

     Plus (+) or Minus (-): The "BB" rating may be modified by the addition of a
plus or minus sign to show relative standing within the major rating categories.

     Below investment-grade  securities present special risks to investors.  The
market  value  of  lower-rated  securities  may be more  volatile  than  that of
higher-rated  securities and generally tends to reflect the market's  perception
of the  creditworthiness  of the issuer and short-term market  developments to a
greater  extent than more  highly  rated  securities,  which  reflect  primarily
fluctuations  in  general  levels  of  interest   rates.   Periods  of  economic
uncertainty and change can be expected to result in increased  volatility in the
market value of lower-rated securities.  Further, such securities may be subject
to greater risks of loss of income and principal,  particularly  in the event of
adverse  economic  changes or increased  interest  rates,  because their issuers
generally  are not as  financially  secure  or as  creditworthy  as  issuers  of
higher-rated  securities.  Additionally,  to  the  extent  that  there  is not a
national market system for secondary  trading of lower-rated  securities,  there
may be a low  volume  of  trading  in such  securities  which  may  make it more
difficult  to value  or sell  those  securities  than  higher-rated  securities.
Adverse publicity and investor perceptions,  whether or not based on fundamental
analysis,  may  decrease  the values  and  liquidity  of high yield  securities,
especially in a thinly traded market.

     Investors  should  recognize  that the  market  for below  investment-grade
securities  is a relatively  recent  development  that has not been tested by an
economic  recession.  An economic  downturn may severely  disrupt the market for
such  securities and cause  financial  stress to the issuers which may adversely
affect  the value of the  securities  held by the Funds and the  ability  of the
issuers of the  securities  held by the Funds to pay principal  and interest.  A
default by an issuer may result in a Fund incurring  additional expenses to seek
recovery of the amounts due it.

     Some  of the  securities  in  which  the  Funds  invest  may  contain  call
provisions.  If the issuer of such a security  exercises a call  provision  in a
declining interest rate market, the Fund would have to replace the security with
a  lower-yielding  security,  resulting  in a  decreased  return for  investors.
Further,  a higher-yielding  security's value will decrease in a rising interest
rate market, which will be reflected in the Fund's net asset value per share.

     Congress recently enacted legislation requiring  federally-insured  savings
and  loan  associations  to  divest  themselves  of  investments  in high  yield
securities.  This legislation might increase the supply of securities  available
for purchase in the secondary  market and,  potentially,  lower the value of the
securities held by the Funds.

     The  Statement  of  Additional  Information  includes  further  information
concerning   the  Funds'   investment   policies   and   applicable   investment
restrictions.   Each  Fund's   investment   objective  and  certain   investment
restrictions  designated  as  such  in  this  Prospectus  or  the  Statement  of
Additional  Information are fundamental policies that may not be changed without
shareholder approval.  All other investment policies described in the Prospectus
and the Statement of Additional  Information  for a Fund are not fundamental and
may be  changed  by the  Board  of  Directors  of the Fund  without  shareholder
approval.

MANAGER AND SUB-ADVISOR

     The  Manager  for  the  Funds  is  Princor   Management   Corporation  (the
"Manager"),  an  indirectly  wholly-owned  subsidiary  of Principal  Mutual Life
Insurance  Company,  a mutual life insurance company organized in 1879 under the
laws of the State of Iowa. The address of the Manager is The Principal Financial
Group,  Des Moines,  Iowa 50392.  The Manager was organized on January 10, 1969,
and since that time has managed  various  mutual  funds  sponsored  by Principal
Mutual Life  Insurance  Company.  As of December 31, 1996, the Manager served as
investment  advisor for 26 such funds with assets  totaling  approximately  $4.0
billion.

     The Manager has executed an agreement with Invista Capital Management, Inc.
("Invista")  under  which  Invista has agreed to assume the  obligations  of the
Manager to provide  investment  advisory  services for the Balanced Fund, Growth
Fund  and  World  Fund.  The  Manager  will  reimburse  Invista  for the cost of
providing  these services.  Invista,  an indirectly  wholly-owned  subsidiary of
Principal  Mutual Life  Insurance  company and an affiliate of the Manager,  was
founded in 1985 and manages investments for institutional  investors,  including
Principal  Mutual  Life.  Assets  under  management  at  December  31, 1996 were
approximately  $19.6 billion.  Invista's  address is 1500 Hub Tower, 699 Walnut,
Des Moines, Iowa 50309.

     The  Manager  or Invista  has  assigned  certain  individuals  the  primary
responsibility  for the  day-to-day  management  of each Fund's  portfolio.  The
persons  primarily  responsible  for the day-to-day  management of each Fund are
identified in the table below:
<TABLE>
<CAPTION>
                             Primarily
     Fund                Responsible Since                           Person Primarily Responsible
____________________   __________________________    ____________________________________________________________________________
<S>                    <C>                           <C>                                                                   
Balanced               April, 1993                   Judith A. Vogel, CFA (BA degree, Central College). Vice President, Invista
                                                     Capital Management, Inc.
                                                     
Bond                   November, 1996                Scott A. Bennett, CFA (MBA degree, University of Iowa) Assistant Director
                                                     Investment Securities, Principal Mutual Life Insurance Company.
                                                     
Capital Accumulation   November, 1969                David L. White,  CFA (BBA  degree, University of Iowa).  Executive Vice
                        (Fund's inception)           President, Invista Capital Management, Inc.; Co-Manager since November,
                                                     1996: Catherine A. Green, CFA, (MBA degree, Drake University). Vice
                                                     President,  Invista Capital Management, Inc.
                                                     
Emerging Growth        December, 1987                Michael R. Hamilton, (BMBA degree, Bellarmine College). Vice President,
and Growth              (Fund's inception)           Invista Capital Management, Inc.
                        and May, 1994 (Fund's        
                        inception), respectively     
                                                     
Government Securities  April, 1987                   Martin J. Schafer (BBA degree, University of Iowa). Vice President, Invista
                        (Fund's inception)           Capital Management, Inc.
                                                     
World                  April, 1994                   Scott D. Opsal, CFA (MBA degree, University of Minnesota). Executive Vice
                                                     President, Invista Capital Management, Inc.
</TABLE>
DUTIES PERFORMED BY THE MANAGER AND SUB-ADVISOR

     Under  Maryland  law,  the  business  and  affairs of each of the Funds are
managed under the direction of its Board of Directors.  The investment  services
and certain  other  services  referred to under the heading  "Cost of  Manager's
Services" in the Statement of Additional  Information are furnished to the Funds
under  the terms of a  Management  Agreement  between  each of the Funds and the
Manager and, for some of the Funds, a Sub-Advisory Agreement between the Manager
and Invista.  The Manager or Invista,  advises the Funds on investment  policies
and on the  composition  of the  Funds'  portfolios.  In  this  connection,  the
Manager,  or  Invista,  furnishes  to the  Board  of  Directors  of each  Fund a
recommended  investment program consistent with that Fund's investment objective
and policies.  The Manager, or Invista,  is authorized,  within the scope of the
approved  investment  program, to determine which securities are to be bought or
sold, and in what amounts.

     The compensation paid by each Fund to the Manager for the fiscal year ended
December 31, 1996 was, on an annual basis, equal to the following  percentage of
average net assets:

                                                               Total
                                          Manager's         Annualized
           Fund                              Fee             Expenses
- ---------------------------               ---------         ----------
 Balanced Fund                             .60%                .63%
 Bond Fund                                 .50%                .53%
 Capital Accumulation Fund                 .48%                .49%
 Emerging Growth Fund                      .64%                .66%
 Government Securities Fund                .50%                .52%
 Growth Fund                               .50%                .52%
 Money Market Fund                         .50%                .56%
 World Fund                                .75%                .90%

     The  compensation  being paid by the World Fund for  investment  management
services is higher than that paid by most funds to their advisor,  but it is not
higher than the fees paid by many funds with similar  investment  objectives and
policies.

     The Manager and Sub-Advisor  may purchase at their own expense  statistical
and other  information  or services from outside  sources,  including  Principal
Mutual Life  Insurance  Company.  An Investment  Service  Agreement  between the
Manager,  Principal Mutual Life Insurance  Company and each Fund,  provides that
Principal Mutual Life Insurance Company will furnish certain personnel, services
and facilities required by the Manager in connection with its performance of the
Management Agreements, and that the Manager will reimburse Principal Mutual Life
Insurance Company for its costs incurred in this regard.  The Investment Service
Agreements  for  the  Capital  Accumulation,   Emerging  Growth  and  Government
Securities  Funds also include as a party Invista Capital  Management,  Inc., an
indirectly  wholly-owned  subsidiary of Principal Mutual Life Insurance Company,
and also  provide  that the  subsidiaries  of  Principal  Mutual Life  Insurance
Company will furnish the same items and be  reimbursed  by the Manager for their
costs incurred in this regard.

     The  Funds  may  from  time  to time  execute  transactions  for  portfolio
securities with, and pay related brokerage  commissions to, Principal  Financial
Securities,  Inc., a  broker-dealer  that is an affiliate of the Distributor and
Manager for each of the Funds.

     The Manager serves as investment  advisor,  dividend  disbursing agent and,
directly  and  through an  affiliate,  as  transfer  agent for each of the Funds
sponsored by Principal Mutual Life Insurance Company.

MANAGERS' COMMENTS

     Princor  Management  Corporation  and Invista are staffed  with  investment
professionals who manage each individual fund.  Comments by these individuals in
the  following  paragraphs  summarize in capsule  form the general  strategy and
recent results of each fund over the past year. The accompanying  charts display
results  for the past 10 years or the life of the fund,  whichever  is  shorter.
Average Annual Total Return  figures  provided for each fund in the graphs below
reflect all expenses of the fund and assume all  distributions are reinvested at
net asset  value.  The figures do not  reflect  expenses  of the  variable  life
insurance  contracts or variable  annuity  contracts  that purchase fund shares;
performance  figures  for the  divisions  of the  contracts  would be lower than
performance figures for the funds due to the additional contract expenses.  Past
performance  is not  predictive  of future  performance.  Returns  and net asset
values fluctuate. Shares are redeemable at current net asset value, which may be
more or less than original cost.

     The various  indices  included in the graphs below are unmanaged and do not
reflect  any  commissions  or  fees  which  would  be  incurred  by an  investor
purchasing  the  securities  included  in the  index.  Investors  cannot  invest
directly into these or any indices.

Growth-Oriented Funds

Principal Balanced Fund
(Judith A. Vogel)

     This balanced  portfolio  combines  stocks,  bonds and cash in a relatively
conservative mix which seeks to provide both capital  appreciation and income to
the shareholder  without taking on undue risk. The asset  allocation of the Fund
generally  approximates 60% stocks and 40% bonds. In the year ended December 31,
1996 the stock market produced exceptional results.  Aided by a healthy economy,
continued corporate profit growth, and a good dose of investor  enthusiasm,  the
S&P 500 Stock Index advanced nearly 23%. Conditions in the bond market were less
supportive  over the year.  Long-term  interest rates rose 0.70% in 1996, with a
lot of volatility  along the way, causing the bond returns to hover between zero
and 3% for the year.  Demonstrating its balanced nature, the Fund produced a 13%
annual return,  about midway between stock and bond market results and very near
the Lipper  Balanced Fund Average.  The bond portion of the Fund's  portfolio is
comprised  of U.S.  Government  notes and bonds  with an  emphasis  on safety of
principal.  The stock portion of the portfolio is concentrated in companies with
stable or growing earnings that are not terribly sensitive to economic activity.
After  six years of  economic  expansion  resulting  in high  rates of  resource
utilization,  corporate profit growth is likely to come down, causing a scarcity
of  earnings  growth.  Companies  that can  continue  to grow  earnings  will be
afforded premium valuations.  There is no independent market index against which
to measure returns of balanced  portfolios,  however,  we show the S&P 500 Stock
Index for your information.

                         Total Returns *
                    As of December 31, 1996
         ---------------------------------------------------
                                             Since Inception
         1 Year           5 Year              Date 12/18/87                     
         13.13%           11.57%                12.16%                 
                        
                        
           Comparison of Change in Value of $10,000 Investment in the
            Balanced Fund, S&P 500 and Lipper Balanced Fund Average
           ----------------------------------------------------------     
                            Fund                             Lipper
            Year Ended      Total          S&P 500          Mid Cap
           December 31,    Return           Index            Index
                           10,000           10,000          10,000
              1988         11,637           11,661          11,229
              1989         12,982           15,356          13,429
              1990         12,147           14,877          13,355
              1991         16,321           19,412          16,930
              1992         18,410           20,891          18,122
              1993         20,447           22,992          20,066
              1994         20,019           23,294          19,561
              1995         24,941           32,037          24,482
              1996         28,215           39,388          27,851
                                    
Note: Past performance is not predictive of future performance.

Principal Capital Accumulation Fund
(David L. White and Catherine A. Green)

     The  strategy  with this  portfolio  is to hold common  stocks of companies
based on a  valuation  that is  attractive  when  compared  to the  market.  The
analytical staff looks at companies' current valuations  compared to the market,
then at historical information to compare valuations to historical averages. The
focus is on the  fundamentals  of an industry and the company to  determine  the
current  and  future  outlook  as these  potential  investments.  From there the
portfolio is constructed to provide a diversified set of investments.

     The Fund  outperformed  the S&P 500 Index and Lipper Growth and Income Fund
Average for 1996.  The  strength of the market was in much fewer  stocks than in
the past.  The volatility  between  industries was much greater than the overall
results.  The Fund  benefited  from several areas of exposure.  Banks and health
care were the strongest  areas for the Fund during the year.  The focus has been
away from the more  cyclical  areas of the economy  which also helped during the
year.  As the economic  cycle  progresses,  the market  places more  emphasis on
companies  with  consistent  earnings  growth,  and we have tended to overweight
these  areas of the  market.  As the  market  performance  continues  to narrow,
however,  it  becomes  increasingly  difficult  to select the  correct  areas of
overperformance.

                   Total Returns *
               As of December 31, 1996
         ----------------------------------------
         1 Year          5 Year           10 Year
         23.50%          14.08%            13.08%

           Comparison of Change in Value of $10,000 Investment in the
  Capital Accumulation Fund, S&P 500 and Lipper Growth and Income Fund Average
  ----------------------------------------------------------------------------
                    Fund                 S&P 500                 Lipper
   Year Ended       Total                 Stock              Growth & Income
  December 31,      Return                Index                Fund Average
                    10,000               10,000                  10,000
     1987           10,647               10,526                  10,184
     1988           12,183               12,274                  11,814
     1989           14,155               16,163                  14,596
     1990           12,759               15,659                  13,946
     1991           17,693               20,433                  18,002
     1992           19,377               21,990                  19,618
     1993           20,888               24,201                  21,884
     1994           20,990               24,519                  21,678
     1995           27,688               33,722                  28,360
     1996           34,193               41,460                  34,253
                                                    
Note: Past performance is not predictive of future performance.

Principal Emerging Growth Fund
(Michael R. Hamilton)

     The equity market was strong in 1996,  but within the market there were two
different trends.  Large-cap stocks performed much better than small-cap stocks.
The  Emerging  Growth  Fund  returned  19.13%  compared  with the Lipper Mid Cap
Average of 17.9%.  The Fund and the  Lipper  Average  trailed  the S&P 500 Index
because of their  emphasis on small cap stocks.  While both trailed the S&P 500,
this was a good year for the fund.

     The  financial  market  continues  to  grapple  with the  paradox of strong
economic growth with no apparent inflation.  Productivity will be key in 1997 if
inflation is to remain benign.  The Fund's portfolio  continues to be focused on
companies that should enhance productivity of both labor and capital. Several of
the technology,  service and cyclical areas support this emphasis. The portfolio
is also overweighted in the financial sector as bank consolidation continues.

     Continued  profit growth will be important in 1997 as well.  Companies with
more predictable and visible earnings growth are preferred. This continues to be
those  that are low cost  producers  and have  competitive  barriers  to  entry.
Selectivity in all sectors will be crucial to outperformance.

              Total Returns *                      
          As of December 31, 1996                  
- ---------------------------------------------------
1 Year     5 Year     Since Inception Date 12/18/87
21.11%      16.64%                 17.73%          
                                        
                  Comparison of Change in Value of $10,000 Investment
                    in the Emerging Growth Fund, S&P 500 and
                          Lipper Mid Cap Fund Average
                -----------------------------------------------------      
                                     Fund                      Lipper          
                 Year Ended          Total       S&P 500       MID CAP 
                 December 31,       Return        Index        Index           
                                    10,000        10,000       10,000          
                    1988            12,369        11,661       11,476          
                    1989            15,070        15,356       14,586          
                    1990            13,186        14,877       14,067          
                    1991            20,240        19,412       21,275          
                    1992            23,264        20,891       23,213          
                    1993            27,750        22,992       26,625          
                    1994            27,967        23,294       26,079          
                    1995            36,080        32,037       34,469          
                    1996            43,697        39,388       40,646          
                                                   
Note:  Past performance is not predictive of future performance.        

Principal Growth Fund
(Michael R. Hamilton)

     The  Growth  Fund  struggled  against  the market in 1996;  struggle  being
relative as 12.23% return is respectable from a historical perspective.  The S&P
500 Index last year was heavily  influenced by the top 25 holdings in the Index.
These are very large companies.  The Fund is more diversified than the Index and
therefore its results were more  representative of the broader market.  With the
market  continuing to struggle  against the potential of an economic boom on one
hand,  versus a slowing or recession on the other, the market could be subjected
to emotional swings depending on the inflation outlook.

     The  Fund's  portfolio  still has a large  focus on health  care  given the
demographics  of the  United  States.  This  was not a  strong  sector  in 1996,
particularly  the managed  care  companies  of which the  portfolio  has a large
exposure.  Also,  the  portfolio has large  positions in  technology  and growth
cyclicals.  These  companies  should do well if the  economy  continues  to move
forward which is indicated by current data.

     The portfolio  contains many  companies that are able to compete on a world
wide basis. This is important as global competition continues.

                    Total Returns *                         
                 As of December 31, 1996  
  -------------------------------------------------------                       
  1 Year         Since Inception Date 5/2/94      10 Year                     
  12.51%                  16.12%                    --            
                                
           Comparison of Change in Value of $10,000 Investment in the
              Growth Fund, S&P 500 and Lipper Growth Fund Average
       --------------------------------------------------------------- 
                              Fund                            Lipper  
       Year Ended             Total         S&P 500           Growth  
       December 31,          Return          Index             Index   
                             10,000         10,000            10,000  
       1994                  10,542         10,397            10,090  
       1995                  13,243         14,299            13,197  
       1996                  14,899         17,580            15,736  
                                                      
Note:  Past performance is not predictive of future performance.        

Principal World Fund
(Scott D. Opsal)

     The  Principal  World Fund's 26.2% total return in 1996 was driven by broad
based market rallies across Europe.  Several  European markets have climbed more
than 20% in 1996,  with  Japan  and  Italy  being  the only  major  markets  not
reflecting  strong gains.  The Fund's  investment  strategy of holding stocks in
smaller European economies  produced  outperformance as interest rate moves have
been favorable this year.  Long bond yields in secondary  European  markets fell
while  rates  in  the  stronger  core  countries  have  inched  up.  The  Fund's
overexposure  to the falling rate markets and  underexposure  to the rising rate
markets was a significant positive factor producing returns that exceeded EAFE's
6.1% and the average international fund in 1996.

     The Fund also benefited from  non-cyclical  stockholdings in Europe.  Food,
drug,  technology,  and stable growth  cyclicals have  outperformed  the heavier
cyclical  industries.  The Fund's move into non-cyclical  growth stocks early in
the year proved  timely.  The Fund  remains  underweighted  in Japan due to poor
valuations  and a weak  economic  outlook.  Japan has been the worst  performing
major  market,  and the Fund's lack of  exposure  to this  market  also  boosted
relative returns.

     Adverse currency changes  diminished the Fund's returns as measured in U.S.
dollars by an  estimated  2%. We believe the EAFE index has  suffered a currency
loss  exceeding 4%, and the average  manager has lost an estimated 3%. Thus, the
Fund's  investment  strategy  placed it in markets  suffering  relatively  small
foreign exchange losses thereby aiding relative return performance.

     The  Principal  World Fund is subject to  specific  risks  associated  with
foreign currency rates, foreign taxation and foreign economies.

                      Total Returns *                      
                 As of December 31, 1996                   
     ----------------------------------------------------
     1 Year    Since Inception Date 5/2/94       10 Year   
     25.09%              12.83%                    --      
                                
           Comparison of Change in Value of $10,000 Investment in the
             World Fund, EAFE and Lipper International Fund Average
          ------------------------------------------------------------   
                            Fund      Morgan Stanley         Lipper  
          Year Ended       Total           EAFE          International   
          December 31,    Return          Index               Index   
                           10,000        10,000              10,000  
          1994              9,663         9,990               9,758   
          1995             11,032        11,110              10,676  
          1996             13,800        11,781              11,934  
                                     
Note:  Past performance is not predictive of future performance.   

Important Notes of the Growth-Oriented Funds:

Standard & Poor's 500 Stock Index:  an unmanaged index of 500 widely held common
stocks representing industrial,  financial, utility and transportation companies
listed  on the  New  York  Stock  Exchange,  American  Stock  Exchange  and  the
Over-the-Counter market.

Lipper  Balanced  Fund  Average:  this  average  consists of mutual  funds which
attempt to conserve  principal by maintaining at all times a balanced  portfolio
of both stocks and bonds. Typically, the stock/bond ratio ranges around 60%/40%.
The one year average currently contains 272 mutual funds.

Lipper Growth Fund Average: This average consists of funds which normally invest
in companies  whose  long-term  earnings  are  expected to growth  significantly
faster than the earnings of the stocks  represented in the major unmanaged stock
indices. The one-year average currently contains 669 funds.

Lipper  Growth & Income  Fund  Average:  this  average  consists  of funds which
combine a growth of earnings  orientation  and an income  requirement  for level
and/or rising dividends. The one year average currently contains 522 funds.

Lipper Mid Cap Fund Average:  This average consists of funds which by prospectus
or portfolio practice,  limit their investments to companies with average market
capitalizations  and/or  revenues  between $800  million and the average  market
capitalization  of the Wilshire  4500 Index (as  captured by the Vanguard  Index
Extended Market Fund). The one-year average currently contains 154 funds.

Morgan  Stanley  EAFE  (Europe,  Australia  and Far East)  Index:  This  average
reflects an arithmetic,  market value  weighted  average of performance of 1,920
listed  securities  which are  listed on the stock  exchanges  of the  following
countries:  Australia,  Austria,  Belgium,  Denmark,  Netherlands,  New Zealand,
Norway, Singapore/Malaysia, Spain, Sweden, Switzerland, and the United Kingdom.

Lipper  International Fund Average:  This average consists of funds which invest
in securities  primarily  traded in markets  outside of the United  States.  The
one-year average currently contains 331 funds.

Income-Oriented Funds

Principal Bond Fund
(Scott A. Bennett)

     The Principal Bond Fund's performance in 1996 lagged when compared to 1995.
1995 was a banner year, mainly because of dramatically declining interest rates.
During 1996 interest rates increased  throughout most of the year based on fears
of  increasing  inflation.  This hurt the  Fund's  relative  performance  as the
duration  target of 7 years  (actual  duration  at  12/31/96  was 6.98 years) is
longer than the average BBB rated bond fund and the BAA Lehman  Corporate Index.
Relative  performance was also negatively  impacted by the lack of a significant
amount of less than  investment  grade bonds in the portfolio.  High yield (less
than investment  grade) debt performed  extremely well during 1996, with many of
the top performing funds in the Lipper BAA universe having significant exposures
to this asset class.

     Over the long-term,  the Fund continues to outperform the average BBB fund.
This is attributed to remaining  fully invested and not trying to guess interest
rates. The BBB corporate bond class continued to be an attractive asset class in
1996,   outperforming  all  other  taxable  investment  grade  classes.  Spreads
continued  to narrow  during the year with  defaults  low and a large  amount of
funds chasing the available bonds.


                    Total Returns *                               
               As of December 31, 1996                            
- --------------------------------------------------------------
1 Year              5 Year     Since Inception Date 12/18/87      
  2.36%             8.20%                 9.55%                   

  Comparison of Change in Value of $10,000 Investment in the Bond Fund, Lehman
 Brothers BAA Corporate Index and Lipper Corporate Debt BBB Rated Fund Average
 -----------------------------------------------------------------------------
                       Fund              Lehman           Lipper
     Year Ended       Total                BAA              BBB
     December 31,    Return              Index              Avg
                      10,000            10,000            10,000
      1988            10,991            11,129            10,900
      1989            12,514            12,699            12,060
      1990            13,167            13,595            12,751
      1991            15,369            16,113            15,020
      1992            16,810            17,512            16,258
      1993            18,771            19,665            18,261
      1994            18,227            18,707            17,447
      1995            22,268            22,959            20,948
      1996            22,794            23,882            21,616
                                                   
Note:  Past performance is not predictive of future performance.    
                                        
Principal Government Securities Fund
(Martin J. Schafer)

     Interest rates rose in 1996, which dampened  absolute fixed income returns.
The Fund underperformed the Lipper U.S. Mortgage Fund Average and the Lehman MBS
Index in 1996 due to its slightly  longer  duration.  However,  since the Fund's
inception of 4/9/87 it has  outperformed  the Lipper U.S.  Mortgage Fund Average
and is competitive with the Lehman MBS Index.

     Results were  enhanced  last year through  identification  and selection of
certain  undervalued sectors of mortgage-backed  securities for a portion of the
portfolio.  These  securities  have now become very popular with Wall Street and
other investors, resulting in their increasing in value.

     The current  portfolio is well  positioned  for the period ahead.  It has a
number of securities that are "seasoned" (e.g., original 30 year loans that have
been  outstanding  for three years or more) and therefore  valued more highly in
the marketplace.  There are few securities  priced above par, so prepayment risk
is negligible.  If the future  continues to be an era of economic  prosperity we
should  continue to see strong  housing  markets and housing  turnover that will
cause  prepayments  on our  securities  to  exceed  market  expectations.  These
repayments  are welcomed,  as the portfolio is priced at a discount and the Fund
will be paid-off at par.

                    Total Returns *
                As of December 31, 1996
- --------------------------------------------------
1 Year     5 Year     Since Inception Date 4/9/87                               
 3.35%     6.68%                8.63%                          
                                
Comparison of Change in Value of $10,000 Investment in the Government Securities
   Fund, Lehman Brothers Mortgage Index and Lipper U.S. Mortgage Fund Average
- --------------------------------------------------------------------------------
                               Fund        Lehman        Lipper  
          Year Ended          Total       Mortgage    U.S. Mortgage   
          December 31,        Return       Index          Index   
                              10,000      10,000        10,000  
               1987           10,099      10,204        10,104  
               1988           10,939      11,094        10,858  
               1989           12,645      12,808        12,224  
               1990           13,852      14,183        13,370  
               1991           16,200      16,410        15,348  
               1992           17,308      17,551        16,285  
               1993           19,051      18,751        17,499  
               1994           18,188      18,450        16,769  
               1995           21,656      21,549        19,491  
               1996           22,381      22,702        20,245  

Note:  Past performance is not predictive of future performance.   

Important Notes of the Income-Oriented Funds:

Lehman Brothers,  BAA Corporate Index: an unmanaged index of all publicly issued
fixed rate  nonconvertible,  dollar-denominated,  SEC-registered  corporate debt
rated Baa or BBB by Moody's or S&P.

Lipper  Corporate Debt BBB Rated Funds Average:  this average consists of mutual
funds  investing at least 65% of their assets in corporate and  government  debt
issues  rated by S&P or Moody's  in the top four  grades.  The one year  average
currently contains 102 mutual funds.

Lehman Brothers Mortgage Index: an unmanaged index of 15- and 30-year fixed rate
securities  backed  by  mortgage  pools  of  the  Government  National  Mortgage
Association (GNMA),  Federal Home Loan Mortgage Corporation (FHLMC), and Federal
National Mortgage Association (FNMA).

Lipper U.S.  Mortgage  Fund  Average:  this  average  consists  of mutual  funds
investing  at least  65% of  their  assets  in  mortgages/securities  issued  or
guaranteed  as to  principal  and  interest by the U.S.  Government  and certain
federal agencies. The one year average currently contains 59 mutual funds.

Note: Mutual fund data from Lipper Analytical Services, Inc.

DETERMINATION OF NET ASSET VALUE OF FUND SHARES

     The net asset  value of each  Fund's  shares is  determined  daily,  Monday
through  Friday,  as of the close of  trading  on the New York  Stock  Exchange,
except on days on which changes in the value of the Fund's portfolio  securities
will not materially  affect the current net asset value of the Fund's redeemable
securities,  on days during  which a Fund  receives no order for the purchase or
sale  of its  redeemable  securities  and no  tender  of  such  a  security  for
redemption, and on customary national business holidays. The net asset value per
share of each Fund is determined by dividing the value of the Fund's  securities
plus all other  assets,  less all  liabilities,  by the  number  of Fund  shares
outstanding.

Growth-Oriented and Income-Oriented Funds

     The following  valuation  information  applies to the  Growth-Oriented  and
Income-Oriented  Funds.  Securities  for which  market  quotations  are  readily
available  are valued using those  quotations.  Other  securities  are valued by
using market quotations, prices provided by market makers or estimates of market
values  obtained from yield data and other factors  relating to  instruments  or
securities   with  similar   characteristics   in  accordance   with  procedures
established in good faith by the Board of Directors.  Securities  with remaining
maturities of 60 days or less are valued at amortized cost when it is determined
by the Board that amortized cost reflects fair value. Other assets are valued at
fair value as determined in good faith by the Board of Directors of the Fund.

     As previously described,  some of the Funds may purchase foreign securities
whose trading is substantially  completed each day at various times prior to the
close of the New York  Stock  Exchange.  The values of such  securities  used in
computing  net asset  value per share are usually  determined  as of such times.
Occasionally,  events  which  affect the values of such  securities  and foreign
currency  exchange rates may occur between the times at which they are generally
determined and the close of the New York Stock Exchange and would  therefore not
be  reflected  in the  computation  of the  Fund's  net asset  value.  If events
materially affecting the value of such securities occur during such period, then
these  securities will be valued at their fair value as determined in good faith
by the  Manager  or  Sub-Advisor  under  procedures  established  and  regularly
reviewed by the Board of  Directors.  To the extent the Fund  invests in foreign
securities  listed on foreign  exchanges  which  trade on days on which the Fund
does not  determine  its net  asset  value,  for  example  Saturdays  and  other
customary  national  U.S.  Holidays,   the  Fund's  net  asset  value  could  be
significantly affected on days when shareholders have no access to the Fund.

Money Market Fund

     The Money  Market Fund  values its  securities  at  amortized  cost.  For a
description of this calculation procedure see the Funds' Statement of Additional
Information.

PERFORMANCE CALCULATION

     From  time  to  time,  the  Funds  may  publish  advertisements  containing
information   (including  graphs,   charts,   tables  and  examples)  about  the
performance  of one or more of the  Funds.  The  Funds'  yield and total  return
figures  described  below  will  vary  depending  upon  market  conditions,  the
composition of the Funds' portfolios and operating  expenses.  These factors and
possible  differences in the methods used in calculating  yield and total return
should  be  considered  when  comparing  the  Funds'   performance   figures  to
performance figures published for other investment vehicles.  The Funds may also
quote  rankings,  yields or  returns as  published  by  independent  statistical
services or publishers,  and  information  regarding the  performance of certain
market  indices.  Any  performance  data  quoted for the Funds  represents  only
historical performance and is not intended to indicate future performance of the
Funds.  The  calculation  of average annual total return and yield for the Funds
does not include  fees and charges of the separate  accounts  that invest in the
Funds and,  therefore,  does not reflect  the  investment  performance  of those
separate accounts.  For further information on how the Funds calculate yield and
total return figures, see the Statement of Additional Information.

Average Annual Total Return

     Each Fund may advertise its respective average annual total return. Average
annual total return for each Fund is computed by calculating  the average annual
compounded  rate of return over the stated  period that would  equate an initial
$1,000  investment to the ending  redeemable  value assuming the reinvestment of
all  dividends  and capital  gains  distributions  at net asset value.  The same
assumptions  are made when  computing  cumulative  total  return by dividing the
ending  redeemable  value by the  initial  investment.  The Funds may also quote
rankings,  yields or returns as published by independent statistical services or
publishers, and information regarding the performance of certain market indices.

Yield and Effective Yield

     From time to time the Money Market Fund may advertise its respective  yield
and effective  yield. The yield of the Fund refers to the income generated by an
investment in the Fund over a seven-day period.  This income is then annualized.
That is, the amount of income  generated by the  investment  during that week is
assumed  to be  generated  each  week over a  52-week  period  and is shown as a
percentage of the investment.  The effective yield is calculated  similarly but,
when annualized, the income earned by an investment in the Fund is assumed to be
reinvested.  The effective  yield will be slightly higher than the yield because
of the compounding effect of this assumed reinvestment.

     The yield for the Money  Market  Fund will  fluctuate  daily as the  income
earned  on the  investments  of the Fund  fluctuates.  Accordingly,  there is no
assurance  that the yield quoted on any given occasion will remain in effect for
any period of time. The Fund is an open-end  investment  company and there is no
guarantee  that the net asset  value or any stated  rate of return  will  remain
constant.  A  shareholder's  investment  in the Fund is not  insured.  Investors
comparing  results of the Fund with  investment  results  and yields  from other
sources such as banks or savings and loan  associations  should understand these
distinctions.  Historical and comparative  yield  information  may, from time to
time, be presented by the Fund.

INCOME DIVIDENDS, DISTRIBUTIONS AND TAX STATUS

     It is  the  policy  of  each  Fund  to  distribute  substantially  all  net
investment  income and net realized gains.  Through such  distributions,  and by
satisfying certain other  requirements,  the Funds intend to qualify for the tax
treatment  accorded  to  regulated  investment  companies  under the  applicable
provisions of the Internal Revenue Code. This means that in each year in which a
Fund so qualifies it will be exempt from federal  income tax upon the amounts so
distributed to investors.

     Any dividends from the net investment income of the Funds (except the Money
Market Fund) will normally be payable to the shareholders  annually, and any net
realized  gains will be  distributed  annually.  All dividends and capital gains
distributions are applied to purchase  additional Fund shares at net asset value
as of the payment date without the imposition of any sales charge.

     Each Fund will  notify  shareholders  of the  portion of each  distribution
which  constitutes  investment income or capital gain. In view of the complexity
of tax considerations,  it is advisable for Eligible Purchasers  considering the
purchase of shares of the Funds to consult  with tax advisors on the federal and
state tax aspects of their investments and redemptions.

Money Market Fund

     The Money Market Fund  declares  dividends of all its daily net  investment
income on each day the Fund's net asset value per share is determined. Dividends
are payable daily and are automatically reinvested in full and fractional shares
of the Fund at the then  current net asset value unless a  shareholder  requests
payment in cash.

     Net  investment  income,  for  dividend  purposes,  consists of (1) accrued
interest  income plus or minus accrued  discount or amortized  premium;  plus or
minus (2) all net short-term  realized  gains and losses;  minus (3) all accrued
expenses of the Fund. Expenses of the Fund are accrued each day. Net income will
be  calculated  immediately  prior to the  determination  of net asset value per
share of the Fund.

     Since the Fund's policy is, under normal  circumstances,  to hold portfolio
securities to maturity and to value  portfolio  securities at amortized cost, it
does not expect any capital gains or losses.  If the Fund does experience gains,
however,  it could  result in an increase in  dividends.  Capital  losses  could
result in a decrease in  dividends.  If for some  extraordinary  reason the Fund
realizes net long-term  capital  gains,  it will  distribute  them once every 12
months.

     Since the net income of the Fund  (including  realized  gains and losses on
the portfolio  securities) is declared as a dividend each time the net income of
the Fund is  determined,  the net asset  value  per  share of the Fund  normally
remains at $1.00 immediately after each determination and dividend  declaration.
Any  increase  in  the  value  of  a  shareholder's   investment  in  the  Fund,
representing reinvestment of dividend income, is reflected by an increase in the
number of shares of the Fund in the account.

     Normally  the Fund  will  have a  positive  net  income at the time of each
determination  thereof.  Net income may be negative if an  unexpected  liability
must be accrued or a loss is realized.  If the net income of the Fund determined
at any time is a negative amount,  the net asset value per share will be reduced
below  $1.00.  If this  happens,  the Fund may endeavor to restore the net asset
value  per  share to $1.00 by  reducing  the  number  of  outstanding  shares by
redeeming  proportionately from shareholders without the payment of any monetary
consideration,  such number of full and  fractional  shares as is  necessary  to
maintain a net asset value per share of $1.00.  Each  shareholder will be deemed
to have agreed to such a redemption in these  circumstances  by investing in the
Fund. The Fund may seek to achieve the same objective of restoring the net asset
value  per  share  to $1.00  by not  declaring  dividends  from  net  income  on
subsequent days until restoration,  with the result that the net asset value per
share would  increase to the extent of positive net income which is not declared
as a dividend, or any other method approved by the Board of Directors.

     The Board of Directors may revise the above  dividend  policy,  or postpone
the  payment of  dividends,  if the Fund  should  have or  anticipate  any large
presently  unexpected  expense,  loss or  fluctuation in net assets which in the
opinion of the Board might have a significant adverse affect on shareholders.

ELIGIBLE PURCHASERS AND PURCHASE OF SHARES

     Only  Eligible  Purchasers  may  purchase  shares  of the  Funds.  Eligible
Purchasers  are  limited to (a)  separate  accounts  of  Principal  Mutual  Life
Insurance  Company or of other insurance  companies;  (b) Principal  Mutual Life
Insurance Company or any subsidiary or affiliate thereof;  (c) trustees or other
managers of any qualified profit sharing, incentive or bonus plan established by
Principal Mutual Life Insurance  Company or any subsidiary or affiliate  thereof
for the  employees of such company,  subsidiary  or affiliate.  Such trustees or
managers  may  purchase  Fund  shares  only in their  capacities  as trustees or
managers  and not for their  personal  accounts.  The Board of Directors of each
Fund  reserves  the  right to  broaden  or limit  the  designation  of  Eligible
Purchasers.

   
     Principal Balanced,  Principal Bond,  Principal Capital  Accumulation Fund,
Principal Emerging Growth,  Principal Government  Securities,  Principal Growth,
Principal  Money Market and  Principal  World Funds each serve as an  underlying
investment  medium for variable  annuity  contracts and variable life  insurance
policies that are funded in separate  accounts  established by Principal  Mutual
Life  Insurance  Company.  It is  conceivable  that  in  the  future  it  may be
disadvantageous  for  variable  life  insurance  separate  accounts and variable
annuity  separate  accounts  to  invest in the  Funds  simultaneously.  Although
neither  Principal Mutual Life Insurance Company nor the Funds currently foresee
any such  disadvantages  either to variable life  insurance  policy owners or to
variable  annuity  contract  owners,  each Fund's Board of Directors  intends to
monitor events in order to identify any material  conflicts  between such policy
owners and contract owners and to determine what action, if any, should be taken
in response thereto. Such action could include the sale of Fund shares by one or
more of the separate accounts,  which could have adverse consequences.  Material
conflicts  could result from, for example,  (1) changes in state insurance laws,
(2) changes in Federal income tax law, (3) changes in the investment  management
of the Fund, or (4)  differences in voting  instructions  between those given by
policy owners and those given by contract owners.
    

     Shares are  purchased  from Princor  Financial  Services  Corporation,  the
principal  underwriter  for the Funds.  There are no sales charges on the Funds'
shares.  There are no  restrictions  on  amounts  to be  invested  in the Funds'
shares.

     Shareholder accounts for each Fund will be maintained under an open account
system. Under this system, an account is automatically opened and maintained for
each new  investor.  Each  investment  is  confirmed  by sending the  investor a
statement of account showing the current purchase and the total number of shares
then  owned.  The  statement  of account is treated by each Fund as  evidence of
ownership  of Fund  shares in lieu of stock  certificates,  and  unless  written
request is made to the Fund, stock  certificates will not be issued or delivered
to investors.  Certificates, which can be stolen or lost, are unnecessary except
for special purposes such as collateral for a loan.  Fractional interests in the
Funds' shares are reflected to three decimal places in the statement of account,
but any stock certificates will be issued only for full shares owned.

     If an offer to purchase  shares is received by any of the Funds  before the
close of trading on the New York Stock  Exchange,  the shares  will be issued at
the offering price (net asset value of Fund shares)  computed on that day. If an
offer is received  after the close of trading or on a day which is not a trading
day,  the shares  will be issued at the  offering  price  computed  on the first
succeeding  day on which a price is  determined.  Dividends  on the Money Market
Fund  shares  will be paid on the next day  following  the  effective  date of a
purchase order.

SHAREHOLDER RIGHTS

     The following  information  is  applicable to each of the Principal  Funds.
Each  Fund  share is  entitled  to one vote  either in person or by proxy at all
shareholder  meetings  for that  Fund.  This  includes  the right to vote on the
election of directors,  selection of independent  accountants  and other matters
submitted  to meetings of  shareholders.  Each share has equal rights with every
other share as to dividends, earnings, voting, assets and redemption. Shares are
fully paid and  non-assessable,  and have no preemptive  or  conversion  rights.
Shares may be issued as full or fractional shares, and each fractional share has
proportionately  the same rights,  including  voting, as are provided for a full
share.  Shareholders  of each of these  Funds may  remove any  director  with or
without  cause by the vote of a majority  of the votes  entitled to be cast at a
meeting of shareholders.

     The bylaws of each Fund provide that the Board of Directors of the Fund may
increase or decrease the aggregate number of shares which the Fund has authority
to issue without a shareholder vote.

     The bylaws of each Fund also  provide that the Fund need not hold an annual
meeting of  shareholders  in any year in which none of the following is required
to be  acted  on by  shareholders  under  the  Investment  Company  Act of 1940:
election of directors;  approval of investment advisory agreement;  ratification
of selection of independent  public  accountants;  and approval of  distribution
agreement.  The Funds intend to hold shareholder  meetings only when required by
law and at such other  times as may be deemed  appropriate  by their  respective
Boards of Directors.

     Shareholder  inquiries  should be  directed to the  applicable  Fund at The
Principal Financial Group, Des Moines, Iowa 50392.

     NON-CUMULATIVE  VOTING: The Funds' shares have non-cumulative voting rights
which  means  that the  holders  of more than 50% of the  shares  voting for the
election of directors  of a Fund can elect 100% of the  directors if they choose
to do so, and in such event,  the holders of the remaining shares voting for the
election of directors will not be able to elect any directors.

     Principal Mutual Life Insurance  Company votes each Fund's shares allocated
to each of its separate accounts  registered under the Investment Company Act of
1940 and attributable to variable  annuity  contracts or variable life insurance
policies  participating  therein in accordance with  instructions  received from
contract or policy holders,  participants  and annuitants.  Other shares of each
Fund held by each  registered  separate  account,  including  those for which no
timely  instructions  are received,  are voted in proportion to the instructions
that are received  with respect to contracts or policies  participating  in that
separate  account.  Shares of each of the Funds held in the  general  account of
Principal Mutual Life Insurance Company or in its unregistered separate accounts
are voted in  proportion to the  instructions  that are received with respect to
contracts and policies participating in its registered and unregistered separate
accounts.  If Principal  Mutual  determines  pursuant to  applicable  law that a
Fund's  shares held in one or more separate  accounts or in its general  account
need  not  be  voted   pursuant  to   instructions   received  with  respect  to
participating  contracts or policies,  it then may vote those Fund shares in its
own right.

REDEMPTION OF SHARES

     Except for the third paragraph below,  most of the following  discussion of
redemption  procedures  is  relevant  only to  Eligible  Purchasers  other  than
variable  annuity and variable life separate  accounts of Principal  Mutual Life
Insurance Company, and its wholly-owned subsidiaries.

     Each Fund will  redeem  its  shares  upon  request.  There is no charge for
redemption.  If no certificates have been issued, a shareholder  simply writes a
letter to the appropriate  Fund requesting  redemption of any part or all of the
shares.  The letter  must be signed  exactly as the  account is  registered.  If
certificates have been issued, they must be properly endorsed and forwarded with
the request.  If payment is to be made to the  registered  shareholder  or joint
shareholders,  the Fund will not  require a signature  guarantee  as a part of a
proper endorsement;  otherwise the shareholder's signature must be guaranteed by
either  a  commercial  bank,  trust  company,  credit  union,  savings  and loan
association,  national  securities  exchange member, or by a brokerage firm. The
price at which the shares are redeemed  will be the net asset value per share as
next  computed  after the  request  (with  appropriate  certificate,  if any) is
received by the Fund in proper and complete form. The amount received for shares
upon redemption may be more or less than the cost of such shares  depending upon
the net asset value at the time of redemption.

     Redemption  proceeds will be sent within three  business days after receipt
of request for  redemption  in proper form.  However,  each Fund may suspend the
right of  redemption  during any period  when (a)  trading on the New York Stock
Exchange is restricted as determined by the Securities  and Exchange  Commission
or such  Exchange  is closed  for  other  than  weekends  and  holidays;  (b) an
emergency exists, as determined by the Securities and Exchange Commission,  as a
result  of  which  (i)  disposal  by the Fund of  securities  owned by it is not
reasonably  practicable,  or (ii) it is not reasonably  practicable for the Fund
fairly to determine the value of its net assets;  or (c) the Commission by order
so permits  for the  protection  of  security  holders of the Fund.  A Fund will
redeem  only  those  shares  for  which  it  has  good  payment.  To  avoid  the
inconvenience  of such a delay,  shares may be purchased with a certified check,
bank  cashier's  check or money  order.  During the  period  prior to the time a
redemption  from the Money  Market Fund is  effective,  dividends on such shares
will accrue and be payable and the shareholder  will be entitled to exercise all
other rights of beneficial ownership.

     Restricted  Transfer:  Shares of each of the Funds may be transferred to an
Eligible Purchaser.  However, whenever any of the Funds is requested to transfer
shares  to other  than an  Eligible  Purchaser,  the  Fund has the  right at its
election  to  purchase  such  shares  at their net asset  value  next  effective
following  the time at which the request for  transfer is  presented;  provided,
however,  that the Fund must notify the transferee or transferees of such shares
in writing  of its  election  to  purchase  such  shares  within  seven (7) days
following the date of such request and  settlement for such shares shall be made
within such seven-day period.

ADDITIONAL INFORMATION

     Custodian:  Bank of New York, 48 Wall Street,  New York, New York 10286, is
custodian  of the  portfolio  securities  and cash  assets  of each of the Funds
except the World Fund. The custodian for the World Fund is Chase Manhattan Bank,
Global Securities Services,  Chase Metro Tech Center,  Brooklyn, New York 11245.
The custodians perform no managerial or policymaking functions for the funds.

     Organization and Share Ownership:  The Funds were incorporated in the state
of Maryland on the following dates: Balanced Fund - November 26, 1986; Bond Fund
- -  November  26,  1986;  Capital  Accumulation  Fund - May 26,  1989  (effective
November 1, 1989  succeeded to the business of a predecessor  Fund that had been
incorporated  in Delaware on February 6, 1969);  Emerging Growth Fund - February
20, 1987;  Government  Securities Fund - June 7, 1985;  Growth Fund - August 20,
1993;  Money  Market  Fund - June 10,  1982;  and World Fund  August  20,  1993.
Principal  Mutual Life  Insurance  Company owns 100% of each Fund's  outstanding
shares.

     Capitalization:  The  authorized  capital  stock of each Fund  consists  of
100,000,000 shares of common stock (500,000,000 for Principal Money Market Fund,
Inc.), $.01 par value.

     Financial Statements:  Copies of the financial statements of each Fund will
be mailed to each shareholder of that Fund  semi-annually.  At the close of each
fiscal  year,  each  Fund's  financial  statements  will be audited by a firm of
independent auditors.  The firm of Ernst & Young LLP has been appointed to audit
the financial statements of each Fund for their respective present fiscal years.

     Registration Statement: This Prospectus omits some information contained in
the  Statement  of  Additional   Information  (also  known  as  Part  B  of  the
Registration  Statement)  and Part C of the  Registration  Statements  which the
Funds  have  filed  with the  Securities  and  Exchange  Commission.  The Funds'
Statement of Additional  Information  is hereby  incorporated  by reference into
this Prospectus. A copy of the Funds' Statement of Additional Information can be
obtained upon request,  free of charge,  by writing or telephoning the Fund. You
may  obtain  a copy of Part C of the  Registration  Statements  filed  with  the
Securities and Exchange Commission,  Washington,  D.C., from the Commission upon
payment of the prescribed fees.

     Principal   Underwriter:   Princor  Financial  Services  Corporation,   The
Principal  Financial  Group,  Des  Moines,  Iowa  50392-0200,  is the  principal
underwriter for each of the Principal Funds.



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