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<PAGE>   1
 
                                      LOGO
 
                                   PROSPECTUS
                                JANUARY 4, 1999
 
                       O TOUCHSTONE EMERGING GROWTH FUND
 
                     O TOUCHSTONE INTERNATIONAL EQUITY FUND
 
                      O TOUCHSTONE INCOME OPPORTUNITY FUND
 
                          O TOUCHSTONE VALUE PLUS FUND
 
                       O TOUCHSTONE GROWTH & INCOME FUND
 
                           O TOUCHSTONE BALANCED FUND
 
                             O TOUCHSTONE BOND FUND
 
                        O TOUCHSTONE STANDBY INCOME FUND
 
Neither the Securities and Exchange Commission nor any state securities
commission has approved any Fund's shares as an investment or determined whether
this prospectus is accurate or complete. Anyone who tells you otherwise is
committing a crime.
<PAGE>   2
 
Touchstone Family of Funds
 
   
The Touchstone Family of Funds is a group of mutual funds. Each Fund has a
different investment goal and risk level and is a part of the Touchstone Series
Trust (the Trust).
    
<PAGE>   3
 
  TABLE OF CONTENTS
 
3
TABLE OF CONTENTS       [ICON]TOUCHSTONE FAMILY OF FUNDS
 
   
<TABLE>
<CAPTION>
                                                             PAGE
<S>                                                          <C>
Touchstone Emerging Growth Fund............................    4
Touchstone International Equity Fund.......................    9
Touchstone Income Opportunity Fund.........................   13
Touchstone Value Plus Fund.................................   17
Touchstone Growth & Income Fund............................   20
Touchstone Balanced Fund...................................   24
Touchstone Bond Fund.......................................   30
Touchstone Standby Income Fund.............................   34
Investment Strategies And Risks............................   38
The Funds' Management......................................   44
Investing With Touchstone..................................   48
Distributions And Taxes....................................   60
Financial Highlights.......................................   61
For More Information.......................................   68
</TABLE>
    
<PAGE>   4
 
  TOUCHSTONE EMERGING
  GROWTH FUND
 
                                                                               4
 
                        [ICON]TOUCHSTONE FAMILY OF FUNDS
TOUCHSTONE EMERGING GROWTH FUND
 
  The Fund's Investment Goal
 The Emerging Growth Fund seeks to increase the value of Fund shares as a
 primary goal and to earn income as a secondary goal.
 
 As with any mutual fund, there is no guarantee that the Fund will achieve its
 goals.
  Its Principal Investment Strategies
 
 The Fund invests primarily (at least 65% of total assets) in the common stocks
 of smaller, rapidly growing (emerging growth) companies. In selecting its
 investments, the portfolio managers focus on those companies they believe will
 grow faster than the U.S. economy in general. They also choose companies they
 believe are priced lower in the market than their true value.
 
 When the portfolio managers believe the following securities offer a good
 potential for capital growth or income, up to 35% of the Fund's assets may be
 invested in:
 
     O Larger company stocks
 
     O Preferred stocks
 
     O Convertible bonds
 
     O Other debt securities, including:
 
       collateralized mortgage obligations (CMOs), stripped U.S. government
       securities (Strips) and mortgage-related securities, all of which will
       be rated investment grade
 
 The Fund may also invest in:
 
     O Securities of foreign companies traded mainly outside the U.S. (up to
       20%)
 
     O American Depositary Receipts (ADRs) (up to 20%)
 
     O Emerging market securities (up to 10%)
 
The Key Risks
 
The Fund's share price will fluctuate and you could lose money on your
investment in the Fund. The Fund could also return less than other investments:
 
     O If the stock market as a whole goes down
 
     O Because securities of small cap companies may be more thinly traded and
       may have more frequent and larger price changes than securities of larger
       cap companies
 
     O If the market continually values the stocks in the Fund's portfolio lower
       than the portfolio managers believe they should be valued
<PAGE>   5
 
  TOUCHSTONE EMERGING
  GROWTH FUND
 
5
 
                        [ICON]TOUCHSTONE FAMILY OF FUNDS
 
     O If the stocks in the Fund's portfolio are not undervalued as expected
     O If the companies in which the Fund invests do not grow as rapidly as
       expected
     O If interest rates go up, causing the value of any debt securities held by
       the Fund to decline
 
     O Because CMOs, Strips and mortgage-related securities may lose more value
       due to changes in interest rates than other debt securities and are
       subject to prepayment
 
     O Because investments in foreign securities may have more frequent and
       larger price changes than U.S. securities and may lose value due to
       changes in currency exchange rates and other factors
 
     O Because emerging market securities involve unique risks, such as exposure
       to economies less diverse and mature than that of the U.S. and economic
       or political changes may cause larger price changes in emerging market
       securities than other foreign securities
 
An investment in the Fund is not a bank deposit and is not insured or guaranteed
by the FDIC or any other government entity.
 
You can find more information about certain securities in which the Fund may
invest and a more detailed description of risks under the heading Investment
Strategies and Risks later in this Prospectus.
 
Who May Want to Invest
 
This Fund is most appropriate for you if you are an aggressive investor and are
willing to assume a relatively high amount of risk. You should be comfortable
with extreme levels of volatility, and safety of principal in the short term
should not be a high priority for you. This Fund's approach may be appropriate
for you if you are many years from retirement and are comfortable with wide
market fluctuations.
 
The Fund's Performance
 
   
The following bar chart indicates the risks of investing in the Emerging Growth
Fund. It shows changes in the performance of the Fund's Class A shares from year
to year since the Fund started. The chart does not reflect any sales charges.
Sales charges will reduce return.
    
 
The Fund's past performance does not necessarily indicate how it will perform in
the future.
 
The return for other classes of shares offered by the Fund will differ from the
Class A returns shown in the bar chart, depending on the expenses of that class.
<PAGE>   6
 
  TOUCHSTONE EMERGING
  GROWTH FUND
 
                                                                               6
 
                        [ICON]TOUCHSTONE FAMILY OF FUNDS
 
    EMERGING GROWTH FUND -- CLASS A PERFORMANCE
 
<TABLE>
<CAPTION>
                  YEARS                        TOTAL RETURN
<S>                                        <C>
1995                                               22.56%
1996                                               10.56%
1997                                               32.20%
</TABLE>
 
   
     During the period shown in the bar chart, the highest quarterly return
     was 17.69% (for the quarter ended June 30, 1997) and the lowest
     quarterly return was -4.07% (for the quarter ended March 31, 1997).
    
 
   
The following table shows how the Fund's average annual returns for the periods
shown compare to those of the Russell 2000 Index and to the Wiesenberger Small
Cap -- MF. The Russell 2000 Index is a widely recognized unmanaged index of
small cap stock performance. The Wiesenberger Small Cap -- MF is a composite
index of the annual returns of mutual funds that have an investment style
similar to that of the Emerging Growth Fund. The table shows the effect of the
Class A sales charge.
    
 
For the periods ended December 31, 1997
 
<TABLE>
<CAPTION>
                                                  PAST 12      SINCE
                                                  MONTHS    FUND STARTED
<S>                                               <C>       <C>
                 EMERGING GROWTH FUND -- CLASS A   24.7%        18.5%
- ------------------------------------------------------------------------
                 EMERGING GROWTH FUND -- CLASS C   30.7%        19.4%
- ------------------------------------------------------------------------
                              RUSSELL 2000 INDEX   22.4%        19.8%
- ------------------------------------------------------------------------
                    WIESENBERGER SMALL CAP -- MF   21.6%        22.2%
- ------------------------------------------------------------------------
</TABLE>
<PAGE>   7
 
  TOUCHSTONE EMERGING
  GROWTH FUND
 
7
 
                        [ICON]TOUCHSTONE FAMILY OF FUNDS
 
The Fund's Fees and Expenses
This table describes the fees and expenses that you may pay if you buy and hold
shares of the Fund:
 
   
<TABLE>
<CAPTION>
                                                SHAREHOLDER FEES (FEES PAID
                                               DIRECTLY FROM YOUR INVESTMENT)
                                              CLASS A SHARES   CLASS C SHARES
<S>                                           <C>              <C>
      MAXIMUM SALES CHARGE (LOAD) IMPOSED ON
      PURCHASES (AS A PERCENTAGE OF OFFERING
                                      PRICE)       5.75%(1)          None
- ------------------------------------------------------------------------------
        MAXIMUM DEFERRED SALES CHARGE (LOAD)
        (AS A PERCENTAGE OF AMOUNT REDEEMED)        None            1.00%(2)
- ------------------------------------------------------------------------------
                                                         ANNUAL FUND OPERATING
                                                   EXPENSES (EXPENSES THAT ARE
                                                    DEDUCTED FROM FUND ASSETS)
 
                             MANAGEMENT FEES       0.80%            0.80%
- ------------------------------------------------------------------------------
                   DISTRIBUTION (12B-1) FEES       0.25%            1.00%
- ------------------------------------------------------------------------------
                              OTHER EXPENSES       3.15%            3.15%
- ------------------------------------------------------------------------------
        TOTAL ANNUAL FUND OPERATING EXPENSES       4.20%            4.95%
- ------------------------------------------------------------------------------
  FEE WAIVER AND/OR EXPENSE REIMBURSEMENT(3)       2.70%            2.70%
- ------------------------------------------------------------------------------
                                NET EXPENSES       1.50%            2.25%
- ------------------------------------------------------------------------------
</TABLE>
    
 
(1) You may pay a reduced sales charge on very large purchases. There is no
    sales charge at the time of purchase for purchases of $1 million or more but
    a sales charge of 1.00% will be assessed on shares redeemed within one year
    of purchase. There is also no initial sales charge on certain purchases in a
    Roth IRA, a Roth Conversion IRA or a qualified retirement plan.
 
(2) The 1.00% is waived for benefits paid to you through a qualified pension
    plan.
 
(3) Touchstone Advisors has contractually agreed to waive or reimburse certain
    of the Total Annual Fund Operating Expenses of each Class of the Fund (the
    "Sponsor Agreement"). The Sponsor Agreement will remain in place until at
    least December 31, 1999.
 
The following example should help you compare the cost of investing in the
Emerging Growth Fund with the cost of investing in other mutual funds. The
example assumes that you invest $10,000 in the Fund for the time periods
indicated and then sell all of your shares at the end of those periods. The
example also assumes that your investment has a 5% return each year and that the
Fund's operating expenses remain the same.
<PAGE>   8
 
  TOUCHSTONE EMERGING
  GROWTH FUND
 
                                                                               8
 
                        [ICON]TOUCHSTONE FAMILY OF FUNDS
 
Although your actual costs may be higher or lower, based on these assumptions
your costs would be:
<TABLE>
<CAPTION>
                                              CLASS A SHARES   CLASS C SHARES
<S>                                               <C>              <C>
                                      1 YEAR      $  719           $  228
- ------------------------------------------------------------------------------
                                     3 YEARS      $1,545           $1,246
- ------------------------------------------------------------------------------
                                     5 YEARS      $2,384           $2,265
- ------------------------------------------------------------------------------
                                    10 YEARS      $4,542           $4,816
- ------------------------------------------------------------------------------
</TABLE>
 
O The example for the 3, 5 and 10-year periods is calculated using the Total
  Fund Operating Expenses before the limits agreed to under the Sponsor
  Agreement for periods after year 1.
<PAGE>   9
 
  TOUCHSTONE INTERNATIONAL
  EQUITY FUND
 
9
 
                        [ICON]TOUCHSTONE FAMILY OF FUNDS
TOUCHSTONE INTERNATIONAL EQUITY FUND
 
  The Fund's Investment Goal
 The International Equity Fund seeks to increase the value of Fund shares over
 the long-term.
 
 As with any mutual fund, there is no guarantee that the Fund will achieve its
 goal.
 
  Its Principal Investment Strategies
 
 The Fund invests primarily (at least 80% of total assets) in equity securities
 of foreign companies and will invest in at least three countries outside the
 United States. A large portion of those non-U.S. equity securities may be
 issued by companies active in emerging market countries (up to 40% of total
 assets).
 
 The Fund may also invest in certain debt securities issued by U.S. and
 non-U.S. entities (up to 20%), including non-investment grade debt securities
 rated as low as B.
 
 The portfolio manager uses a growth oriented style to choose investments for
 the Fund. This includes the use of both qualitative and quantitative analysis
 to identify markets and companies that offer solid growth prospects at
 reasonable prices. The portfolio manager's investment process seeks to add
 value by making good regional and country allocations as well as by selecting
 individual stocks within a region.
 
The Key Risks
 
The Fund's share price will fluctuate and you could lose money on your
investment in the Fund. The Fund could also return less than other investments:
 
     O If the stock market as a whole goes down
 
     O Because investments in foreign securities may have more frequent and
       larger price changes than U.S. securities and may lose value due to
       changes in currency exchange rates and other factors
 
     O Because emerging market securities involve unique risks, such as exposure
       to economies less diverse and mature than that of the U.S. and economic
       or political changes may cause larger price changes in emerging market
       securities than other foreign securities
 
     O If the stocks in the Fund's portfolio do not grow over the long term as
       expected
 
     O If interest rates go up, causing the value of any debt securities held by
       the Fund to decline
 
     O Because issuers of non-investment grade securities held by the Fund are
       more likely to be unable to make timely payments of interest or principal
 
An investment in the Fund is not a bank deposit and is not insured or guaranteed
by the FDIC or any other government entity.
 
You can find more information about certain securities in which the Fund may
invest and a more detailed description of risks under the heading Investment
Strategies and Risks later in this Prospectus.
<PAGE>   10
 
  TOUCHSTONE INTERNATIONAL
  EQUITY FUND
 
                                                                              10
 
                        [ICON]TOUCHSTONE FAMILY OF FUNDS
 
Who May Want to Invest
This Fund is most appropriate for you if you are an aggressive investor and are
willing to assume a relatively high amount of risk. You should be comfortable
with extreme levels of volatility, and safety of principal in the short term
should not be a high priority for you. This Fund's approach may be appropriate
for you if you are many years from retirement and are comfortable with wide
market fluctuations.
 
The Fund's Performance
 
The bar chart shown below indicates the risks of investing in the International
Equity Fund. It shows changes in the performance of the Fund's Class A shares
from year to year since the Fund started. The chart does not reflect any sales
charges. Sales charges will reduce return.
 
The Fund's past performance does not necessarily indicate how it will perform in
the future.
 
The return for other classes of shares offered by the Fund will differ from the
Class A returns shown in the bar chart, depending on the expenses of that class.
 
                INTERNATIONAL EQUITY FUND --
                        CLASS A PERFORMANCE
BAR CHART
 
<TABLE>
<CAPTION>
                YEARS                      TOTAL RETURN
<S>                                     <C>
1995                                            5.29%
1996                                           11.61%
1997                                           15.57%
</TABLE>
 
   
     During the period shown in the bar chart, the highest quarterly return
     was 11.96% (for the quarter ended June 30, 1997) and the lowest
     quarterly return was -3.95 (for the quarter ended March 31, 1995).
    
<PAGE>   11
 
  TOUCHSTONE INTERNATIONAL
  EQUITY FUND
 
11
 
                        [ICON]TOUCHSTONE FAMILY OF FUNDS
 
The table below shows how the Fund's average annual returns for the periods
shown compare to those of the MSCI EAFE Index and the Wiesenberger Non-US
Equity -- MF index. The MSCI EAFE Index is a Morgan Stanley index that includes
stocks traded on 16 exchanges in Europe, Australia and the Far East. The
Wiesenberger Non-US Equity -- MF is a composite index of the annual returns of
mutual funds that have an investment style similar to that of the International
Equity Fund. The table shows the effect of the Class A sales charge.
 
For the periods ended December 31, 1997
 
   
<TABLE>
<CAPTION>
                                                   PAST 12      SINCE
                                                   MONTHS    FUND STARTED
<S>                                                <C>       <C>
             INTERNATIONAL EQUITY FUND -- CLASS A    8.9%        4.9%
    
   
- -------------------------------------------------------------------------
             INTERNATIONAL EQUITY FUND -- CLASS C   14.7%        6.0%
    
   
- -------------------------------------------------------------------------
                                  MSCI EAFE INDEX    2.1%        5.8%
    
   
- -------------------------------------------------------------------------
                 WIESENBERGER NON-US EQUITY -- MF   -2.0%        3.2%
    
   
- -------------------------------------------------------------------------
</TABLE>
    
 
The Fund's Fees and Expenses
 
   
This table describes the fees and expenses that you may pay if you buy and hold
shares of the Fund:
    
 
   
<TABLE>
<CAPTION>
                                                SHAREHOLDER FEES (FEES PAID
                                               DIRECTLY FROM YOUR INVESTMENT)
                                              CLASS A SHARES   CLASS C SHARES
<S>                                           <C>              <C>
      MAXIMUM SALES CHARGE (LOAD) IMPOSED ON
      PURCHASES (AS A PERCENTAGE OF OFFERING
                                      PRICE)    5.75%(1)             None
- ------------------------------------------------------------------------------
 
        MAXIMUM DEFERRED SALES CHARGE (LOAD)
        (AS A PERCENTAGE OF AMOUNT REDEEMED)        None         1.00%(2)
- ------------------------------------------------------------------------------
                                                ANNUAL FUND OPERATING EXPENSES
                                                            (EXPENSES THAT ARE
                                                    DEDUCTED FROM FUND ASSETS)
 
                             MANAGEMENT FEES       0.95%            0.95%
- ------------------------------------------------------------------------------
                   DISTRIBUTION (12B-1) FEES       0.25%            1.00%
- ------------------------------------------------------------------------------
                              OTHER EXPENSES       2.63%            2.63%
- ------------------------------------------------------------------------------
        TOTAL ANNUAL FUND OPERATING EXPENSES       3.83%            4.58%
- ------------------------------------------------------------------------------
  FEE WAIVER AND/OR EXPENSE REIMBURSEMENT(3)       2.23%            2.23%
- ------------------------------------------------------------------------------
                                NET EXPENSES       1.60%            2.35%
- ------------------------------------------------------------------------------
</TABLE>
    
 
(1) You may pay a reduced sales charge on very large purchases. There is no
    sales charge at the time of purchase for purchases of $1 million or more but
    a sales charge of 1.00% will be assessed on shares redeemed within one year
    of purchase. There is also no initial sales charge on certain purchases in a
    Roth IRA, a Roth Conversion IRA or a qualified retirement plan.
 
(2) The 1.00% is waived for benefits paid to you through a qualified pension
    plan.
 
(3) Touchstone Advisors has contractually agreed to waive or reimburse certain
    of the Total Annual Fund Operating Expenses of each Class of the Fund (the
    "Sponsor Agreement"). The Sponsor Agreement will remain in place until at
    least December 31, 1999.
<PAGE>   12
 
  TOUCHSTONE INTERNATIONAL
  EQUITY FUND
 
                                                                              12
 
                        [ICON]TOUCHSTONE FAMILY OF FUNDS
 
The following example should help you compare the cost of investing in the
International Equity Fund with the cost of investing in other mutual funds. The
example assumes that you invest $10,000 in the Fund for the time periods
indicated and then sell all of your shares at the end of those periods. The
example also assumes that your investment has a 5% return each year and that the
Fund's operating expenses remain the same. Although your actual costs may be
higher or lower, based on these assumptions your costs would be:

<TABLE>
<CAPTION>
                                              CLASS A SHARES   CLASS C SHARES
<S>                                               <C>              <C>
                                      1 YEAR      $  728           $  238
- ------------------------------------------------------------------------------
                                     3 YEARS      $1,484           $1,182
- ------------------------------------------------------------------------------
                                     5 YEARS      $2,257           $2,135
- ------------------------------------------------------------------------------
                                    10 YEARS      $4,270           $4,550
- ------------------------------------------------------------------------------
</TABLE>
 
O The example for the 3, 5 and 10-year periods is calculated using the Total
  Fund Operating Expenses before the limits agreed to under the Sponsor
  Agreement for periods after year 1.
<PAGE>   13
 
  TOUCHSTONE INCOME
  OPPORTUNITY FUND
 
13
 
                        [ICON]TOUCHSTONE FAMILY OF FUNDS
TOUCHSTONE INCOME OPPORTUNITY FUND
 
  The Fund's Investment Goal
 
 The Income Opportunity Fund seeks to achieve a high level of current income as
 its main goal. The Fund may also seek to increase the value of Fund shares, if
 consistent with its main goal.
 
 As with any mutual fund, there is no guarantee that the Fund will achieve its
 goal.
  Its Principal Investment Strategies
 
   
 The Fund invests primarily in debt securities.  These debt securities will
 generally be more risky non-investment grade corporate and government
 securities (up to 100% of total assets). Non-investment grade debt securities
 are often referred to as "junk bonds" and are considered speculative.
    
 
 The Fund's investments may include:
 
     O Securities of foreign companies (up to 100%), but only up to 30% of its
       assets in securities of foreign companies that are denominated in a
       currency other than the U.S. dollar
 
     O Debt securities that are emerging market securities (up to 65%)
 
     O Mortgage-related securities, loans and loan participations
 
     O Currency futures and option contracts
 
The Key Risks
 
The Fund's share price will fluctuate and you could lose money on your
investment in the Fund. The Fund could also return less than other investments:
 
     O If interest rates go up, causing the value of any debt securities held by
       the Fund to decline
 
     O Because issuers of non-investment grade securities held by the Fund are
       more likely to be unable to make timely payments of interest or principal
 
     O Because investments in foreign securities may have more frequent and
       larger price changes than U.S. securities and may lose value due to
       changes in currency exchange rates and other factors
 
     O Because emerging market securities involve unique risks, such as exposure
       to economies less diverse and mature than that of the U.S. and economic
       or political changes may cause larger price changes in emerging market
       securities than other foreign securities
 
     O Because mortgage-related securities may lose more value due to changes in
       interest rates than other debt securities and are subject to prepayments
 
     O Because loans and loan participations may be more difficult to sell than
       other investments and subject to the risk of borrower default
 
     O If the stock market as a whole goes down
<PAGE>   14
 
  TOUCHSTONE INCOME
  OPPORTUNITY FUND
 
                                                                              14
 
                        [ICON]TOUCHSTONE FAMILY OF FUNDS
 
An investment in the Fund is not a bank deposit and is not insured or guaranteed
by the FDIC or any other government entity.
 
You can find more information about certain securities in which the Fund may
invest and a more detailed description of risks under the heading Investment
Strategies and Risks later in this Prospectus.
 
Who May Want to Invest
 
This Fund is most appropriate for you if you are an aggressive investor and are
willing to assume a relatively high amount of risk. You should be comfortable
with extreme levels of volatility, and safety of principal in the short term
should not be a high priority for you. This Fund's approach may be appropriate
for you if you are many years from retirement and are comfortable with wide
market fluctuations.
 
The Fund's Performance
 
   
The following bar chart indicates the risks of investing in the Equity Fund. It
shows changes in the performance of the Fund's Class A shares from year to year
since the Fund started. The chart does not reflect any sales charges. Sales
charges will reduce return.
    
 
The Fund's past performance does not necessarily indicate how it will perform in
the future.
 
The return for other classes of shares offered by the Fund will differ from the
Class A returns shown in the bar chart, depending on the expenses of that class.
<PAGE>   15
 
  TOUCHSTONE INCOME
  OPPORTUNITY FUND
 
15
 
                        [ICON]TOUCHSTONE FAMILY OF FUNDS
 
                           INCOME OPPORTUNITY FUND --
BAR CHART                     CLASS A PERFORMANCE
 
<TABLE>
<CAPTION>
                YEARS                      TOTAL RETURN
<S>                                     <C>
1995                                           23.19%
1996                                           26.66%
1997                                            9.49%
</TABLE>
 
   
     During the period shown in the bar chart, the highest quarterly return
     was 16.15% (for the quarter ended June 30, 1995) and the lowest
     quarterly return was -5.44% (for the quarter ended March 31, 1995).
    
 
The table below shows how the Fund's average annual returns for the periods
shown compare to those of the Lehman Brothers Corporate Bond Index, the
Wiesenberger Corp - High Yield - MF and the Wiesenberger Global Income -- MF.
The Lehman Brothers Corporate Bond Index is based on all publicly issued
intermediate fixed-rate, non-convertible investment grade domestic corporate
debt. The Wiesenberger Corp - High Yield -- MF index and the Wiesenberger Global
Income -- MF index are composite indexes of the annual returns of mutual funds
that have an investment style similar to the Income Opportunity Fund. The table
shows the effect of the Class A sales charge.
 
For the periods ended December 31, 1997
 
<TABLE>
<CAPTION>
                                                   PAST 12    SINCE FUND
                                                   MONTHS      STARTED
<S>                                                <C>       <C>
               INCOME OPPORTUNITY FUND -- CLASS A    4.3%       13.5%
- -------------------------------------------------------------------------
               INCOME OPPORTUNITY FUND -- CLASS C    8.6%       14.4%
- -------------------------------------------------------------------------
             LEHMAN BROTHERS CORPORATE BOND INDEX   10.2%       10.9%
- -------------------------------------------------------------------------
            WIESENBERGER CORP -- HIGH YIELD -- MF   12.6%       12.5%
- -------------------------------------------------------------------------
                 WIESENBERGER GLOBAL INCOME -- MF    3.3%        8.3%
- -------------------------------------------------------------------------
</TABLE>
<PAGE>   16
 
  TOUCHSTONE INCOME
  OPPORTUNITY FUND
 
                                                                              16
 
                        [ICON]TOUCHSTONE FAMILY OF FUNDS
 
The Fund's Fees and Expenses
 
These tables describe the fees and expenses that you may pay if you buy and hold
shares of the Fund:
 
   
<TABLE>
<CAPTION>
                                                SHAREHOLDER FEES (FEES PAID
                                              DIRECTLY FROM YOUR INVESTMENT)
                                              CLASS A SHARES   CLASS C SHARES
<S>                                           <C>              <C>
      MAXIMUM SALES CHARGE (LOAD) IMPOSED ON
      PURCHASES (AS A PERCENTAGE OF OFFERING
                                      PRICE)   4.75%(1)             None
    
   
- -----------------------------------------------------------------------------
        MAXIMUM DEFERRED SALES CHARGE (LOAD)
        (AS A PERCENTAGE OF AMOUNT REDEEMED)       None         1.00%(2)
    
   
- -----------------------------------------------------------------------------
                                                        ANNUAL FUND OPERATING
                                                  EXPENSES (EXPENSES THAT ARE
                                                   DEDUCTED FROM FUND ASSETS)
                             MANAGEMENT FEES      0.65%            0.65%
    
   
- -----------------------------------------------------------------------------
                   DISTRIBUTION (12B-1) FEES      0.25%            1.00%
    
   
- -----------------------------------------------------------------------------
                              OTHER EXPENSES      2.43%            2.43%
    
   
- -----------------------------------------------------------------------------
        TOTAL ANNUAL FUND OPERATING EXPENSES      3.33%            4.08%
    
   
- -----------------------------------------------------------------------------
  FEE WAIVER AND/OR EXPENSE REIMBURSEMENT(3)      2.13%            2.13%
    
   
- -----------------------------------------------------------------------------
                                NET EXPENSES      1.20%            1.95%
    
   
- -----------------------------------------------------------------------------
</TABLE>
    
 
(1) You may pay a reduced sales charge on very large purchases. There is no
    sales charge at the time of purchase for purchases of $1 million or more but
    a sales charge of 1.00% will be assessed on shares redeemed within one year
    of purchase. There is also no initial sales charge on certain purchases in a
    Roth IRA, a Roth Conversion IRA or a qualified retirement plan.
 
(2) The 1.00% is waived for benefits paid to you through a qualified pension
    plan.
 
(3) Touchstone Advisors has contractually agreed to waive or reimburse certain
    of the Total Annual Fund Operating Expenses of each Class of the Fund (the
    "Sponsor Agreement"). The Sponsor Agreement will remain in place until at
    least December 31, 1999.
 
The following example should help you compare the cost of investing in the
Equity Fund with the cost of investing in other mutual funds. The example
assumes that you invest $10,000 in the Fund for the time periods indicated and
then sell all of your shares at the end of those periods. The example also
assumes that your investment has a 5% return each year and that the Fund's
operating expenses remain the same. Although your actual costs may be higher or
lower, based on these assumptions your costs would be:

<TABLE>
<CAPTION>
                                                                  CLASS C
                                              CLASS A SHARES       SHARES
<S>                                               <C>              <C>
                                      1 YEAR      $ 591            $ 198
- -----------------------------------------------------------------------------
                                     3 YEARS      $1,261           $1,047
- -----------------------------------------------------------------------------
                                     5 YEARS      $1,953           $1,911
- -----------------------------------------------------------------------------
                                    10 YEARS      $3,787           $4,142
- -----------------------------------------------------------------------------
</TABLE>
 
O The example for the 3, 5 and 10-year periods is calculated using the Total
  Fund Operating Expenses before the limits agreed to under the Sponsor
  Agreement for periods after year 1.
<PAGE>   17
 
  TOUCHSTONE VALUE PLUS FUND
 
17
 
                        [ICON]TOUCHSTONE FAMILY OF FUNDS
TOUCHSTONE VALUE PLUS FUND
 
  The Fund's Investment Goal
 
 The Value Plus Fund seeks to increase the value of Fund shares over the
 long-term.
 
 As with any mutual fund, there is no guarantee that it will achieve its goals.
  Its Principal Investment Strategies
 
 The Fund invests primarily (at least 65% of total assets) in common stock of
 larger companies that the portfolio manager believes are undervalued. In
 choosing undervalued stocks, the portfolio manager looks for companies that
 have proven management and unique features or advantages but are believed to
 be priced lower than their true value. These companies may not pay dividends.
 The Fund may also invest in common stocks of rapidly growing companies to
 enhance the Fund's return and vary its investments to avoid having too much of
 the Fund's assets subject to risks specific to undervalued stocks.
 
 Up to 70% of total assets may be invested in large cap companies and up to 30%
 may be invested in mid cap companies.
 
 The Fund may invest in:
 
     O Preferred stocks (up to 35%)
 
     O Investment grade debt securities
 
     O Convertible securities
 
 In addition, the Fund may invest in:
 
     O Cash equivalent investments (up to 10%)
 
     O Short-term debt securities
 
The Key Risks
 
The Fund's share price will fluctuate and you could lose money on your
investment in the Fund. The Fund could also return less than other investments:
 
     O If the stock market as a whole goes down
 
     O If the market continually values the stocks in the Fund's portfolio lower
       than the portfolio manager believes they should be valued
 
     O If the stocks in the Fund's portfolio are not undervalued as expected
 
     O If interest rates go up, causing the value of any debt securities held by
       the Fund to decline
 
An investment in the Fund is not a bank deposit and is not insured or guaranteed
by the FDIC or any other government entity.
 
You can find more information about certain securities in which the Fund may
invest and a more detailed description of risks under the heading Investment
Strategies and Risks later in this Prospectus.
<PAGE>   18
 
  TOUCHSTONE VALUE PLUS FUND
 
                                                                              18
 
                        [ICON]TOUCHSTONE FAMILY OF FUNDS
 
Who May Want to Invest
 
This Fund will be most appealing to you if you are a moderate, or risk tolerant
investor. You should be comfortable with a fair degree of volatility. Capital
appreciation may be important to you, but you may not want to take extreme risks
in order to achieve it. This Fund's approach may be most appropriate for you if
you are many years from retirement and are comfortable with a moderate level of
risk.
 
Performance Note
 
Performance information is only shown for those Funds which have had a full
calendar year of operations. Since the Value Plus Fund started on May 1, 1998,
there is no performance information included in this Prospectus.
 
The Fund's Fees and Expenses
 
This table describes the fees and expenses that you may pay if you buy and hold
shares of the Fund:
 
   
<TABLE>
<CAPTION>
                                                SHAREHOLDER FEES (FEES PAID
                                              DIRECTLY FROM YOUR INVESTMENT)
                                              CLASS A SHARES   CLASS C SHARES
<S>                                           <C>              <C>
      MAXIMUM SALES CHARGE (LOAD) IMPOSED ON
      PURCHASES (AS A PERCENTAGE OF OFFERING
                                      PRICE)   5.75%(1)             None
    
   
- -----------------------------------------------------------------------------
        MAXIMUM DEFERRED SALES CHARGE (LOAD)
        (AS A PERCENTAGE OF AMOUNT REDEEMED)       None         1.00%(2)
    
   
- -----------------------------------------------------------------------------
                                                        ANNUAL FUND OPERATING
                                                  EXPENSES (EXPENSES THAT ARE
                                                   DEDUCTED FROM FUND ASSETS)
                             MANAGEMENT FEES      0.75%            0.75%
    
   
- -----------------------------------------------------------------------------
                   DISTRIBUTION (12B-1) FEES      0.25%            1.00%
    
   
- -----------------------------------------------------------------------------
                              OTHER EXPENSES      1.14%            1.14%
    
   
- -----------------------------------------------------------------------------
        TOTAL ANNUAL FUND OPERATING EXPENSES      2.14%            2.89%
    
   
- -----------------------------------------------------------------------------
  FEE WAIVER AND/OR EXPENSE REIMBURSEMENT(3)      0.84%            0.84%
    
   
- -----------------------------------------------------------------------------
                                NET EXPENSES      1.30%            2.05%
    
   
- -----------------------------------------------------------------------------
</TABLE>
    
 
(1) You may pay a reduced sales charge on very large purchases. There is no
    sales charge at the time of purchase for purchases of $1 million or more but
    a sales charge of 1.00% will be assessed on shares redeemed within one year
    of purchase. There is also no initial sales charge on certain purchases in a
    Roth IRA, a Roth Conversion IRA or a qualified retirement plan.
 
(2) The 1.00% is waived for benefits paid to you through a qualified pension
    plan.
 
(3) Touchstone Advisors has contractually agreed to waive or reimburse certain
    of the Total Annual Fund Operating Expenses of each Class of the Fund (the
    "Sponsor Agreement"). The Sponsor Agreement will remain in place until at
    least December 31, 1999.
<PAGE>   19
 
  TOUCHSTONE VALUE PLUS FUND
 
19
 
                        [ICON]TOUCHSTONE FAMILY OF FUNDS
 
The following examples should help you compare the cost of investing in the
Value Plus Fund with the cost of investing in other mutual funds. The example
assumes that you invest $10,000 in the Fund for the time periods indicated and
then sell all of your shares at the end of those periods. The example also
assumes that your investment has a 5% return each year and that the Fund's
operating expenses remain the same. Although your actual costs may be higher or
lower, based on these assumptions your costs would be:

<TABLE>
<CAPTION>
                                                                  CLASS C
                                              CLASS A SHARES       SHARES
<S>                                               <C>              <C>
                                      1 YEAR      $ 700            $ 208
- -----------------------------------------------------------------------------
                                     3 YEARS      $1,130           $ 816
- -----------------------------------------------------------------------------
</TABLE>
 
O The example for the 3-year period is calculated using the Total Fund Operating
  Expenses before the limits agreed to under the Sponsor Agreement for periods
  after year 1.
<PAGE>   20
 
  TOUCHSTONE GROWTH &
  INCOME FUND
 
                                                                              20
 
                        [ICON]TOUCHSTONE FAMILY OF FUNDS
TOUCHSTONE GROWTH & INCOME FUND
 
  The Fund's Investment Goal
 
 The Growth & Income Fund seeks to increase the value of Fund shares over the
 long-term, while receiving dividend income.
 
 As with any mutual fund, there is no guarantee that the Fund will achieve its
 goals.
 
  Its Principal Investment Strategies
 
 The Fund invests primarily (at least 65% of total assets) in dividend-paying
 common stocks, preferred stocks and convertible securities in a variety of
 industries. The portfolio manager may choose to purchase securities which do
 not pay dividends (up to 35%) but which are expected to increase in value or
 produce high income payments in the future.
 
 In choosing securities for the Fund, the portfolio manager will follow a value
 oriented style, generally buying securities with yields that are at least 20%
 higher than the average yield of companies in the S&P 500. The portfolio
 manager focuses on investing in companies that have a market capitalization of
 at least $1 billion, but may invest in companies of any size.
 
 The Fund may also invest up to 20% of its total assets in debt
 securities -- and within this 20% limitation, the Fund may invest the full 20%
 in investment grade debt securities or up to 5% in non-convertible
 non-investment grade debt securities.
 
 The Fund may also invest in:
 
     O Securities of foreign companies including American Depository Receipts
       (ADRs) (up to 20%)
 
   
     O Real estate investment trusts (REITs) (up to 10%)
    
 
The Key Risks
 
The Fund's share price will fluctuate and you could lose money on your
investment in the Fund. The Fund could also return less than other investments:
 
     O If the stock market as a whole goes down
 
     O If any of the stocks in the Fund's portfolio do not increase in value as
       expected
 
     O If earnings of companies the Fund invests in are not achieved and income
       available for interest or dividend payments is reduced
 
     O If interest rates go up, causing the value of any debt securities held by
       the Fund to decline
 
     O Because investments in foreign securities may have more frequent and
       larger price changes than U.S. securities and may lose value due to
       changes in currency exchange rates and other factors
 
     O Because investments in REITs are more sensitive to changes in interest
       rates and other factors that affect real estate values
 
An investment in the Fund is not a bank deposit and is not insured or guaranteed
by the FDIC or any other government entity.
<PAGE>   21
 
  TOUCHSTONE GROWTH &
  INCOME FUND
 
21
 
                        [ICON]TOUCHSTONE FAMILY OF FUNDS
 
You can find more information about certain securities in which the Fund may
invest and a more detailed description of risks under the heading Investment
Strategies and Risks later in this Prospectus.
 
Who May Want to Invest
 
This Fund will be most appealing to you if you are a moderate or risk tolerant
investor. You should be comfortable with a fair degree of volatility. Capital
appreciation of your investment capital may be important to you, however, you
may be uncomfortable taking extreme risk in order to achieve it. This Fund's
approach may be most appropriate for you if you are many years from retirement
and are comfortable with a moderate level of risk.
 
The Fund's Performance
 
The bar chart shown below indicates the risks of investing in the Growth &
Income Fund. It shows changes in the performance of the Fund's Class A shares
from year to year since the Fund started. The chart does not reflect any sales
charges. Sales charges will reduce return.
 
The Fund's past performance does not necessarily indicate how it will perform in
the future.
 
The return for other classes of shares offered by the Fund will differ from the
Class A returns shown in the bar chart, depending on the expenses of that class.
 
 GROWTH & INCOME FUND -- CLASS A PERFORMANCE
 
<TABLE>
<CAPTION>
                YEARS                      TOTAL RETURN
<S>                                     <C>
1995                                           35.14%
1996                                           16.95%
1997                                           20.70%
</TABLE>
 
     During the period shown in the bar chart, the highest quarterly return
     was 11.77% (for the quarter ended June 30, 1997) and the lowest
     quarterly return was -4.35% (for the quarter ended March 31, 1997).
<PAGE>   22
 
  TOUCHSTONE GROWTH &
  INCOME FUND
 
                                                                              22
 
                        [ICON]TOUCHSTONE FAMILY OF FUNDS
 
The table below shows how the Fund's average annual returns for the periods
shown compare to those of the S&P 500 Index and to the Wiesenberger Growth &
Income -- MF Index. The S&P 500 Index is a widely recognized unmanaged index of
stock performance. The Wiesenberger Growth & Income -- MF Index is a composite
index of the annual returns of mutual funds that have an investment style
similar to the Growth & Income Fund. The table shows the effect of the Class A
sales charge.
 
For the periods ended December 31, 1997
 
<TABLE>
<CAPTION>
                                                   PAST 12      SINCE
                                                   MONTHS    FUND STARTED
<S>                                                <C>       <C>
                  GROWTH & INCOME FUND -- CLASS A   13.7%       19.9%
- -------------------------------------------------------------------------
                  GROWTH & INCOME FUND -- CLASS C   19.2%       21.3%
- -------------------------------------------------------------------------
                                    S&P 500 INDEX   33.4%       28.4%
- -------------------------------------------------------------------------
               WIESENBERGER GROWTH & INCOME -- MF   26.4%       22.8%
- -------------------------------------------------------------------------
</TABLE>
 
   
The Fund's Fees and Expenses
    
 
This table describes the fees and expenses that you may pay if you buy and hold
shares of the Fund:
 
   
<TABLE>
<CAPTION>
                                                SHAREHOLDER FEES (FEES PAID
                                              DIRECTLY FROM YOUR INVESTMENT)
                                              CLASS A SHARES   CLASS C SHARES
<S>                                           <C>              <C>
      MAXIMUM SALES CHARGE (LOAD) IMPOSED ON
      PURCHASES (AS A PERCENTAGE OF OFFERING
                                      PRICE)   5.75%(1)             None
    
   
- -----------------------------------------------------------------------------
        MAXIMUM DEFERRED SALES CHARGE (LOAD)
        (AS A PERCENTAGE OF AMOUNT REDEEMED)       None         1.00%(2)
    
   
- -----------------------------------------------------------------------------
                                                        ANNUAL FUND OPERATING
                                                  EXPENSES (EXPENSES THAT ARE
                                                   DEDUCTED FROM FUND ASSETS)
                             MANAGEMENT FEES      0.80%            0.80%
    
   
- -----------------------------------------------------------------------------
                   DISTRIBUTION (12B-1) FEES      0.25%            1.00%
    
   
- -----------------------------------------------------------------------------
                              OTHER EXPENSES      1.40%            1.40%
    
   
- -----------------------------------------------------------------------------
        TOTAL ANNUAL FUND OPERATING EXPENSES      2.45%            3.20%
    
   
- -----------------------------------------------------------------------------
  FEE WAIVER AND/OR EXPENSE REIMBURSEMENT(3)      1.15%            1.15%
    
   
- -----------------------------------------------------------------------------
                                NET EXPENSES      1.30%            2.05%
    
   
- -----------------------------------------------------------------------------
</TABLE>
    
 
(1) You may pay a reduced sales charge on very large purchases. There is no
    sales charge at the time of purchase for purchases of $1 million or more but
    a sales charge of 1.00% will be assessed on shares redeemed within one year
    of purchase. There is also no initial sales charge on certain purchases in a
    Roth IRA, a Roth Conversion IRA or a qualified retirement plan.
 
(2) The 1.00% is waived for benefits paid to you through a qualified pension
    plan.
 
(3) Touchstone Advisors has contractually agreed to waive or reimburse certain
    of the Total Annual Fund Operating Expenses of each Class of the Fund (the
    "Sponsor Agreement"). The Sponsor Agreement will remain in place until at
    least December 31, 1999.
<PAGE>   23
 
  TOUCHSTONE GROWTH &
  INCOME FUND
 
23
 
                        [ICON]TOUCHSTONE FAMILY OF FUNDS
 
The following example should help you compare the cost of investing in the
Growth & Income Fund with the cost of investing in other mutual funds. The
example assumes that you invest $10,000 in the Fund for the time periods
indicated and then sell all of your shares at the end of those periods. The
example also assumes that your investment has a 5% return each year and that the
Fund's operating expenses remain the same. Although your actual costs may be
higher or lower, based on these assumptions your costs would be:
 
<TABLE>
<CAPTION>
                                            CLASS A SHARES   CLASS C SHARES
<S>                                         <C>              <C>
                                    1 YEAR      $  700           $  208
- ---------------------------------------------------------------------------
                                   3 YEARS      $1,191           $  879
- ---------------------------------------------------------------------------
                                   5 YEARS      $1,708           $1,574
- ---------------------------------------------------------------------------
                                  10 YEARS      $3,119           $3,424
- ---------------------------------------------------------------------------
</TABLE>
 
O The example for the 3, 5 and 10-year periods is calculated using the Total
  Fund Operating Expenses before the limits agreed to under the Sponsor
  Agreement for periods after year 1.
<PAGE>   24
 
  TOUCHSTONE BALANCED FUND
 
                                                                              24
 
TOUCHSTONE BALANCED FUND[ICON]TOUCHSTONE FAMILY OF FUNDS
 
  The Fund's Investment Goal
 
 The Balanced Fund seeks to achieve both an increase in the value of Fund
 shares and current income.
 
 As with any mutual fund, there is no guarantee that the Fund will achieve its
 goals.
  Its Principal Investment Strategies
 
 The Fund invests in both equity securities (generally about 60% of total
 assets) and debt securities (generally about 40%, but at least 25%). The debt
 securities will be rated investment grade or at the highest level of
 non-investment grade.
 
 The Fund may invest in:
 
     O Warrants
 
     O Preferred stocks
 
     O Convertible securities
 
 The Fund may also invest up to one-third of its assets in securities of
 foreign companies, and up to 15% in emerging market securities.
 
 In choosing equity securities for the Fund, the portfolio manager will seek
 out companies that are in a strong position within their industry, are owned
 in part by management and are selling at a price lower than the company's
 intrinsic value. Debt securities are also chosen using a value style. The
 portfolio manager will focus on higher yielding securities, but will also
 consider expected movements in interest rates and industry position.
 
The Key Risks
 
The Fund's share price will fluctuate and you could lose money on your
investment in the Fund. The Fund could also return less than other investments:
 
     O If the stock market as a whole goes down
 
     O If the stocks in the Fund's portfolio do not increase in value as
       expected
 
     O If earnings of companies the Fund invests in are not achieved and income
       available for interest or dividend payments is reduced
 
     O If interest rates go up, causing the value of any debt securities held by
       the Fund to decline
 
     O Because investments in foreign securities may have more frequent and
       larger price changes than U.S. securities and may lose value due to
       changes in currency exchange rates and other factors
 
     O Because emerging market securities involve unique risks, such as exposure
       to economies less diverse and mature than that of the U.S. and economic
       or political changes may cause larger price changes in emerging market
       securities than other foreign securities
<PAGE>   25
 
  TOUCHSTONE BALANCED FUND
 
25
 
                        [ICON]TOUCHSTONE FAMILY OF FUNDS
 
An investment in the Fund is not a bank deposit and is not insured or guaranteed
by the FDIC or any other government entity.
You can find more information about certain securities in which the Fund may
invest and a more detailed description of risks under the heading Investment
Strategies and Risks later in this Prospectus.
 
Who May Want to Invest
 
This Fund is most appropriate for you if you are a risk neutral or moderately
conservative investor. You may typically take a relatively low risk approach to
investing and may be comfortable with a low level of volatility in your
investments. While safety may be important to you, you may also value
appreciation of your investments. If you invest in this Fund, you should be
willing to accept some risk. This Fund's approach may be appropriate for you if
you are several years from retirement.
 
The Fund's Performance
 
The following bar chart indicates the risks of investing in the Balanced Fund.
It shows changes in the performance of the Fund's Class A shares from year to
year since the Fund started. The chart does not reflect any sales charges. Sales
charges will reduce return.
 
The Fund's past performance does not necessarily indicate how it will perform in
the future.
 
The return for other classes of shares offered by the Fund will differ from the
Class A returns shown in the bar chart, depending on the expenses of that class.
<PAGE>   26
 
  TOUCHSTONE BALANCED FUND
 
                                                                              26
 
                        [ICON]TOUCHSTONE FAMILY OF FUNDS
 
                      BALANCED FUND -- CLASS A PERFORMANCE
BAR CHART
 
<TABLE>
<CAPTION>
                YEARS                      TOTAL RETURN
<S>                                     <C>
1995                                           23.24%
1996                                           16.86%
1997                                           19.25%
</TABLE>
 
     During the period shown in the bar chart, the highest quarterly return
     was 10.71% (for the quarter ended June 30, 1997) and the lowest
     quarterly return was -0.32% (for the quarter ended March 31, 1997).
<PAGE>   27
 
  TOUCHSTONE BALANCED FUND
 
27
 
                        [ICON]TOUCHSTONE FAMILY OF FUNDS
 
The table which follows shows how the Fund's average annual returns for the
periods shown compare to those of the Standard & Poor's Composite Index of 500
Stocks, the Lehman Brothers Government/Corporate Index and to the Wiesenberger
Balanced Domestic -- MF index. The Lehman Brothers Government/Corporate Index is
composed of 5,400 publicly issued corporate and U.S. government debt rated Baa
or better with at least one year to maturity and at least $25 million par
outstanding. The Wiesenberger Balanced Domestic -- MF index is a composite index
of the annual returns of mutual funds that have an investment style similar to
the Balanced Fund. The table shows the effect of the Class A sales charge.
 
For the periods ended December 31, 1997
 
<TABLE>
<CAPTION>
                                                   PAST 12    SINCE FUND
                                                   MONTHS      STARTED
<S>                                                <C>       <C>
                         BALANCED FUND -- CLASS A   12.4%       16.1%
- -------------------------------------------------------------------------
                         BALANCED FUND -- CLASS C   18.4%       17.4%
- -------------------------------------------------------------------------
                                    S&P 500 INDEX   33.4%       28.4%
- -------------------------------------------------------------------------
       LEHMAN BROTHERS GOVERNMENT/CORPORATE INDEX    9.8%        9.7%
- -------------------------------------------------------------------------
             WIESENBERGER BALANCED DOMESTIC -- MF   18.6%       16.8%
- -------------------------------------------------------------------------
</TABLE>
<PAGE>   28
 
  TOUCHSTONE BALANCED FUND
 
                                                                              28
 
                        [ICON]TOUCHSTONE FAMILY OF FUNDS
 
   
The Fund's Fees and Expenses
    
 
   
The following tables describe the fees and expenses that you may pay if you buy
and hold shares of a Fund:
    
 
   
<TABLE>
<CAPTION>
                                                SHAREHOLDER FEES (FEES PAID
                                              DIRECTLY FROM YOUR INVESTMENT)
                                              CLASS A SHARES   CLASS C SHARES
<S>                                           <C>              <C>
      MAXIMUM SALES CHARGE (LOAD) IMPOSED ON
      PURCHASES (AS A PERCENTAGE OF OFFERING
                                      PRICE)   5.75%(1)             None
    
   
- -----------------------------------------------------------------------------
        MAXIMUM DEFERRED SALES CHARGE (LOAD)
        (AS A PERCENTAGE OF AMOUNT REDEEMED)       None         1.00%(2)
    
   
- -----------------------------------------------------------------------------
                                                        ANNUAL FUND OPERATING
                                                  EXPENSES (EXPENSES THAT ARE
                                                   DEDUCTED FROM FUND ASSETS)
                             MANAGEMENT FEES      0.80%            0.80%
    
   
- -----------------------------------------------------------------------------
                   DISTRIBUTION (12B-1) FEES      0.25%            1.00%
    
   
- -----------------------------------------------------------------------------
                              OTHER EXPENSES      3.62%            3.62%
    
   
- -----------------------------------------------------------------------------
        TOTAL ANNUAL FUND OPERATING EXPENSES      4.67%            5.42%
    
   
- -----------------------------------------------------------------------------
  FEE WAIVER AND/OR EXPENSE REIMBURSEMENT(3)      3.32%            3.32%
    
   
- -----------------------------------------------------------------------------
                                NET EXPENSES      1.35%            2.10%
    
   
- -----------------------------------------------------------------------------
</TABLE>
    
 
(1) You may pay a reduced sales charge on very large purchases. There is no
    sales charge at the time of purchase for purchases of $1 million or more but
    a sales charge of 1.00% will be assessed on shares redeemed within one year
    of purchase. There is also no initial sales charge on certain purchases in a
    Roth IRA, a Roth Conversion IRA or a qualified retirement plan.
 
(2) The 1.00% is waived for benefits paid to you through a qualified pension
    plan.
 
   
(3) Touchstone Advisors has contractually agreed to waive or reimburse certain
    of the Total Annual Fund Operating Expenses of each Class of the Fund (the
    "Sponsor Agreement"). The Sponsor Agreement will remain in place until at
    least December 31, 1999.
    
<PAGE>   29
 
  TOUCHSTONE BALANCED FUND
 
29
 
                        [ICON]TOUCHSTONE FAMILY OF FUNDS
 
The following example should help you compare the cost of investing in the
Balanced Fund with the cost of investing in other mutual funds. The example
assumes that you invest $10,000 in the Fund for the time periods indicated and
then sell all of your shares at the end of those periods. The example also
assumes that your investment has a 5% return each year and that the Fund's
operating expenses remain the same. Although your actual costs may be higher or
lower, based on these assumptions your costs would be:

<TABLE>
<CAPTION>
                                                                  CLASS C
                                              CLASS A SHARES       SHARES
<S>                                 <C>          <C>              <C>  

                                      1 YEAR      $ 705            $ 213
- -----------------------------------------------------------------------------
                                     3 YEARS      $1,620           $1,324
- -----------------------------------------------------------------------------
                                     5 YEARS      $2,541           $2,425
- -----------------------------------------------------------------------------
                                    10 YEARS      $4,872           $5,139
- -----------------------------------------------------------------------------
</TABLE>
 
O The example for the 3, 5 and 10-year periods is calculated using the Total
  Fund Operating Expenses before the limits agreed to under the Sponsor
  Agreement for periods after year 1.
<PAGE>   30
 
  TOUCHSTONE BOND FUND
 
                                                                              30
 
TOUCHSTONE BOND FUND    [ICON]TOUCHSTONE FAMILY OF FUNDS
 
  The Fund's Investment Goal
 The Bond Fund seeks to provide a high level of current income.
 
 As with any mutual fund, there is no guarantee that the Fund will achieve its
 goals.
  Its Principal Investment Strategies
 
 The Fund invests primarily in higher quality investment grade debt securities
 (at least 65% of total assets). The Fund's investment in debt securities may
 be determined by the direction in which interest rates are expected to move
 because the value of these securities generally moves in the opposite
 direction from interest rates. The Fund expects to have an average maturity
 between five and fifteen years.
 
 The Fund invests in:
 
     O Mortgage-related securities
 
     O Asset-backed securities
 
     O Preferred stocks
 
 The Fund also invests in U.S. or foreign debt securities which are rated
 non-investment grade (up to 35%).
 
 In addition, the Fund may invest in:
 
     O Debt securities denominated in foreign currencies (20% or less)
 
The Key Risks
 
The Fund's share price will fluctuate and you could lose money on your
investment in the Fund. The Fund could also return less than other investments:
 
     O If interest rates go up, causing the value of any debt securities held by
       the Fund to decline
 
     O Because investments in foreign securities may have more frequent and
       larger price changes than U.S. securities and may lose value due to
       changes in currency exchange rates and other factors
 
     O Because issuers of non-investment grade securities held by the Fund are
       more likely to be unable to make timely payments of interest or principal
 
     O Because mortgage-related securities and asset-backed securities may lose
       more value due to changes in interest rates than other debt securities
       and are subject to prepayment
 
An investment in the Fund is not a bank deposit and is not insured or guaranteed
by the FDIC or any other government entity.
 
You can find more information about certain securities in which the Fund may
invest and a more detailed description of risks under the heading Investment
Strategies and Risks later in this Prospectus.
<PAGE>   31
 
  TOUCHSTONE BOND FUND
 
31
 
                        [ICON]TOUCHSTONE FAMILY OF FUNDS
 
Who May Want to Invest
This Fund is most appropriate for you if you prefer to take a relatively low
risk approach to investing. Safety of your investment may be the most important
factor to you. You may be willing to accept potentially lower returns in order
to maintain a lower, more tolerable level of risk. This Fund's approach may be
most appropriate for you if you are nearing retirement.
 
The Fund's Performance
 
   
The following bar chart indicates the risks of investing in the Bond Fund. It
shows changes in the performance of the Fund's Class A shares from year to year
since the Fund's inception. The chart does not reflect any sales charges. Sales
charges will reduce return.
    
 
The Fund's past performance does not necessarily indicate how it will perform in
the future.
 
The return for other classes of shares offered by the Fund will differ from the
Class A returns shown in the bar chart, depending on the expenses of that class.
 
            BOND FUND -- CLASS A PERFORMANCE
 
<TABLE>
<CAPTION>
                YEARS                      TOTAL RETURN
<S>                                     <C>
1995                                           16.95%
1996                                            2.85%
1997                                            7.30%
</TABLE>
 
     During the period shown in the bar chart, the highest quarterly return
     was 5.21% (for the quarter ended December 31, 1997) and the lowest
     quarterly return was -2.10% (for the quarter ended March 31, 1997).
<PAGE>   32
 
  TOUCHSTONE BOND FUND
 
                                                                              32
 
                        [ICON]TOUCHSTONE FAMILY OF FUNDS
 
The table below shows how the Fund's average annual returns for the periods
shown compare to those of the Lehman Brothers Aggregate Index and to the
Wiesenberger Corp -- Investment Grade -- MF index. The Lehman Brothers Aggregate
Index is comprised of approximately 6000 publicly traded bonds with an average
maturity of about 10 years. The Wiesenberger Corp -- Investment Grade -- MF
index is a composite index of the annual returns of mutual funds that have an
investment style similar to the Bond Fund. The table shows the effect of the
Class A sales charge.
 
For the periods ended December 31, 1997
 
   
<TABLE>
<CAPTION>
                                                   PAST 12    SINCE FUND
                                                   MONTHS      STARTED
<S>                                                <C>       <C>
                             BOND FUND -- CLASS A    2.2%        6.7%
    
   
- -------------------------------------------------------------------------
                             BOND FUND -- CLASS C    6.4%        7.5%
    
   
- -------------------------------------------------------------------------
                  LEHMAN BROTHERS AGGREGATE INDEX    9.7%        9.7%
    
   
- -------------------------------------------------------------------------
    
   
      WIESENBERGER CORP -- INVESTMENT GRADE -- MF    8.9%        9.2%
    
   
- -------------------------------------------------------------------------
</TABLE>
    
 
   
The Fund's Fees and Expenses
    
 
These tables describe the fees and expenses that you may pay if you buy and hold
shares of the Fund:
 
   
<TABLE>
<CAPTION>
                                                SHAREHOLDER FEES (FEES PAID
                                              DIRECTLY FROM YOUR INVESTMENT)
                                              CLASS A SHARES   CLASS C SHARES
<S>                                           <C>              <C>
      MAXIMUM SALES CHARGE (LOAD) IMPOSED ON
      PURCHASES (AS A PERCENTAGE OF OFFERING
                                      PRICE)   4.75%(1)             None
    
   
- -----------------------------------------------------------------------------
        MAXIMUM DEFERRED SALES CHARGE (LOAD)
        (AS A PERCENTAGE OF AMOUNT REDEEMED)       None         1.00%(2)
    
   
- -----------------------------------------------------------------------------
                                                        ANNUAL FUND OPERATING
                                                  EXPENSES (EXPENSES THAT ARE
                                                   DEDUCTED FROM FUND ASSETS)
                             MANAGEMENT FEES      0.55%            0.55%
    
   
- -----------------------------------------------------------------------------
                   DISTRIBUTION (12B-1) FEES      0.25%            1.00%
    
   
- -----------------------------------------------------------------------------
                              OTHER EXPENSES      1.49%            1.49%
    
   
- -----------------------------------------------------------------------------
        TOTAL ANNUAL FUND OPERATING EXPENSES      2.29%            3.04%
    
   
- -----------------------------------------------------------------------------
  FEE WAIVER AND/OR EXPENSE REIMBURSEMENT(3)      1.39%            1.39%
    
   
- -----------------------------------------------------------------------------
                                NET EXPENSES      0.90%            1.65%
    
   
- -----------------------------------------------------------------------------
</TABLE>
    
 
(1) You may pay a reduced sales charge on very large purchases. There is no
    sales charge at the time of purchase for purchases of $1 million or more but
    a sales charge of 1.00% will be assessed on shares redeemed within one year
    of purchase. There is also no initial sales charge on certain purchases in a
    Roth IRA, a Roth Conversion IRA or a qualified retirement plan.
 
(2) The 1.00% is waived for benefits paid to you through a qualified pension
    plan.
<PAGE>   33
 
  TOUCHSTONE BOND FUND
 
33
 
                        [ICON]TOUCHSTONE FAMILY OF FUNDS
 
(3) Touchstone Advisors has contractually agreed to waive or reimburse certain
    of the Total Annual Fund Operating Expenses of each Class of the Fund (the
    "Sponsor Agreement"). The Sponsor Agreement will remain in place until at
    least December 31, 1999.
The following example should help you compare the cost of investing in the Bond
Fund with the cost of investing in other mutual funds. The example assumes that
you invest $10,000 in the Fund for the time periods indicated and then sell all
of your shares at the end of those periods. The example also assumes that your
investment has a 5% return each year and that the Fund's operating expenses
remain the same. Although your actual costs may be higher or lower, based on
these assumptions your costs would be:

<TABLE>
<CAPTION>
                                                                  CLASS C
                                              CLASS A SHARES       SHARES
<S>                                               <C>              <C>
                                      1 YEAR      $ 562            $ 168
- -----------------------------------------------------------------------------
                                     3 YEARS      $1,029           $ 809
- -----------------------------------------------------------------------------
                                     5 YEARS      $1,521           $1,475
- -----------------------------------------------------------------------------
                                    10 YEARS      $2,873           $3,258
- -----------------------------------------------------------------------------
</TABLE>
 
O The example for the 3, 5 and 10-year periods is calculated using the Total
  Fund Operating Expenses before the limits agreed to under the Sponsor
  Agreement for periods after year 1.
<PAGE>   34
 
  TOUCHSTONE STANDBY
  INCOME FUND
 
                                                                              34
 
                        [ICON]TOUCHSTONE FAMILY OF FUNDS
TOUCHSTONE STANDBY INCOME FUND
 
  The Fund's Investment Goal
 
 The Standby Income Fund seeks to provide a higher level of current income than
 a money market fund, while also seeking to prevent large fluctuations in the
 value of your initial investment. The Fund does not try to keep a constant
 $1.00 per share net asset value.
 
 As with any mutual fund, there is no guarantee that the Fund will achieve its
 goals.
  Its Principal Investment Strategies
 
 The Fund invests mostly in various types of money market instruments. All
 investments will be rated at least investment grade. On average, the
 securities held by the Fund will mature in less than one year.
 
 The Fund's investments may include:
 
     O Short-term government securities
 
     O Mortgage-related securities
 
     O Asset-backed securities
 
     O Repurchase agreements
 
 The Fund may invest up to 50% of total assets in:
 
     O Securities denominated in U.S. dollars and issued in the U.S. by foreign
       issuers (known as Yankee bonds)
 
     O Eurodollar Certificates of Deposit
 
 In addition, the Fund may invest in:
 
     O Debt securities denominated in foreign currencies (up to 20%)
 
     O Corporate bonds, commercial paper, certificates of deposit, and bankers'
       acceptances
 
The Key Risks
 
The Fund's share price will fluctuate and you could lose money on your
investment in the Fund. The Fund could also return less than other investments:
 
     O If interest rates go up, causing the value of any debt securities to
       decline
 
     O Because mortgage-related securities and asset-backed securities may lose
       more value due to changes in interest rates than other debt securities
       and are subject to prepayment
 
     O Because investments in foreign securities may have more frequent and
       larger price changes than U.S. securities and may lose value due to
       changes in currency exchange rates and other factors
 
An investment in the Fund is not a bank deposit and is not insured or guaranteed
by the FDIC or any other government entity.
<PAGE>   35
 
  TOUCHSTONE STANDBY
  INCOME FUND
 
35
 
                        [ICON]TOUCHSTONE FAMILY OF FUNDS
 
You can find more information about certain securities in which the Fund may
invest and a more detailed description of risks under the heading Investment
Strategies and Risks later in this Prospectus.
 
Who May Want to Invest
 
This Fund is most appropriate for you if you take a relatively low risk approach
to investing. Safety of your investment is of key importance to you.
Additionally, you are willing to accept potentially lower returns in order to
maintain a lower, more tolerable level of risk. This Fund's approach may be most
appropriate for you if you are nearing retirement, or if you have a longer time
horizon, but nevertheless, have a lower risk tolerance. This Fund is also
appropriate for you if you want the added convenience of writing checks directly
from your account.
 
The Fund's Performance
 
The bar chart shown below indicates the risks of investing in the Standby Income
Fund. It shows changes in the performance of the Fund's shares from year to year
since the Fund's inception.
 
The Fund's past performance does not necessarily indicate how it will perform in
the future.
 
   
           STANDBY INCOME FUND PERFORMANCE
 
<TABLE>
<CAPTION>
                YEARS                      TOTAL RETURN
<S>                                     <C>
1995                                           5.71%
1996                                           4.80%
1997                                           5.21%
</TABLE>
    
 
     During the period shown in the bar chart, the highest quarterly return
     was 1.57% (for the quarter ended December 31, 1995) and the lowest
     quarterly return was 1.07% (for the quarter ended March 31, 1996).
<PAGE>   36
 
  TOUCHSTONE STANDBY
  INCOME FUND
 
                                                                              36
 
                        [ICON]TOUCHSTONE FAMILY OF FUNDS
 
The table below shows how the Fund's average annual returns for the periods
shown compare to those of the Merrill Lynch 91-Day Treasury Index and to the
30-Day Money Market Yield Index. The Merrill Lynch 91-Day Treasury Index
consists of short-term U.S. Treasury securities, maturing in 91 days. The 30-Day
Money Market Yield Index is an index of money market funds based on 30-day
yields.
 
For the periods ended December 31, 1997
 
<TABLE>
<CAPTION>
                                                   PAST 12      SINCE
                                                   MONTHS    FUND STARTED
<S>                                                <C>       <C>
                              STANDBY INCOME FUND    5.2%        5.2%
- -------------------------------------------------------------------------
              MERRILL LYNCH 91-DAY TREASURY INDEX    5.3%        5.5%
- -------------------------------------------------------------------------
                  30-DAY MONEY MARKET YIELD INDEX    5.1%        5.1%
- -------------------------------------------------------------------------
</TABLE>
 
   
The Fund's Fees and Expenses
    
 
These tables describe the fees and expenses that you may pay if you buy and hold
shares of the Fund:
 
   
<TABLE>
<CAPTION>
                                                 SHAREHOLDER FEES (FEES PAID
                                                     DIRECTLY FROM YOUR
                                                         INVESTMENT)
<S>                                              <C>
         MAXIMUM SALES CHARGE (LOAD) IMPOSED ON
  PURCHASES (AS A PERCENTAGE OF OFFERING PRICE)             None
    
   
- ----------------------------------------------------------------------------
           MAXIMUM DEFERRED SALES CHARGE (LOAD)
           (AS A PERCENTAGE OF AMOUNT REDEEMED)             None
    
   
- ----------------------------------------------------------------------------
                                                    ANNUAL FUND OPERATING
                                                 EXPENSES (EXPENSES THAT ARE
                                                 DEDUCTED FROM FUND ASSETS)
 
                                MANAGEMENT FEES             0.25%
    
   
- ----------------------------------------------------------------------------
                      DISTRIBUTION (12B-1) FEES             None
    
   
- ----------------------------------------------------------------------------
                                 OTHER EXPENSES             3.26%
    
   
- ----------------------------------------------------------------------------
           TOTAL ANNUAL FUND OPERATING EXPENSES             3.51%
    
   
- ----------------------------------------------------------------------------
     FEE WAIVER AND/OR EXPENSE REIMBURSEMENT(1)             2.76%
    
   
- ----------------------------------------------------------------------------
                                   NET EXPENSES             0.75%
    
   
- ----------------------------------------------------------------------------
</TABLE>
    
 
(1) Touchstone Advisors has contractually agreed to waive or reimburse certain
    of the Total Annual Fund Operating Expenses of the Fund (the "Sponsor
    Agreement"). The Sponsor Agreement will remain in place until at least
    December 31, 1999.
 
The following example should help you compare the cost of investing in the
Standby Income Fund with the cost of investing in other mutual funds. The
example assumes that you invest $10,000 in the Fund for the time periods
indicated and then sell all of your shares at the end of those periods. The
example also assumes that your investment has a 5% return each year and that the
Fund's operating expenses remain the same. Although your actual
<PAGE>   37
 
  TOUCHSTONE STANDBY
  INCOME FUND
 
37
 
                        [ICON]TOUCHSTONE FAMILY OF FUNDS
 
costs may be higher or lower, based on these assumptions your costs would be:

<TABLE>
<S>                                              <C>
                                         1 YEAR  $   77
- ----------------------------------------------------------------------------
                                        3 YEARS  $  819
- ----------------------------------------------------------------------------
                                        5 YEARS  $1,584
- ----------------------------------------------------------------------------
                                       10 YEARS  $3,599
- ----------------------------------------------------------------------------
</TABLE>
 
O The example for the 3, 5 and 10-year periods is calculated using the Total
  Fund Operating Expenses before the limits agreed to under the Sponsor
  Agreement for periods after year 1.
<PAGE>   38
 
  INVESTMENT STRATEGIES
  AND RISKS
 
                                                                              38
 
                        [ICON]TOUCHSTONE FAMILY OF FUNDS
INVESTMENT STRATEGIES AND RISKS
 
   
Can a Fund Depart From its Normal Strategies?
    
 
   
Each Fund may depart from its investment strategies by taking temporary
defensive positions in response to adverse market, economic or political
conditions. During these times, a Fund may not achieve its investment goals.
    
 
   
Do the Funds Engage in Active Trading of Securities?
    
 
   
The International Equity Fund, Income Opportunity Fund and Bond Fund may engage
in active trading to achieve their investment goals. This may cause the Fund to
realize higher capital gains which would be passed on to you. Higher capital
gains could increase your tax liability. Frequent trading also increases
transaction costs, which would lower the Fund's performance.
    
 
   
Can a Fund Change its Investment Goal?
    
 
   
A Fund's investment goal(s) may be changed by a vote of the Board of Trustees
without shareholder approval. You would be notified at least 30 days before any
such change took effect.
    
 
   
Year 2000 Risk
    
 
   
Touchstone has implemented steps intended to assure that its major computer
systems and processes are capable of Year 2000 processing. We are also examining
the third parties with whom we work to assess their readiness and are developing
contingency plans to assure that any problems in their systems will not
materially affect Touchstone's operations.
    
 
   
Companies or governmental entities in which Touchstone Funds invest could also
be affected by the Year 2000 issue, but at this time the Funds cannot predict
the degree of impact.
    
 
   
Computer systems failure of Touchstone, a Fund Sub-Advisor or that of any Fund
service provider could impair Fund services and have a negative impact on a
Fund's operations and returns.
    
 
   
The Funds at a Glance
    
 
   
The following two tables can give you a quick basic understanding of the types
of securities a Fund tends to invest in and some of the risks associated with a
Fund's investments. You should read all of the information about a Fund and its
risks before deciding to invest.
    
<PAGE>   39
 
  INVESTMENT STRATEGIES
  AND RISKS
 
39
 
                        [ICON]TOUCHSTONE FAMILY OF FUNDS
 
   
How Can I Tell, at a Glance, Which Types of Securities a Fund
Might Invest in?
    
   
The following table shows the main types of securities in
which each Fund generally will invest. Some of the Funds'
investments are described in detail below:
    
 
   
<TABLE>
<CAPTION>
                                 EMERGING   INTERNATIONAL    INCOME                  GROWTH                       STANDBY
                                  GROWTH       EQUITY      OPPORTUNITY  VALUE PLUS  & INCOME   BALANCED    BOND   INCOME
                                   FUND         FUND          FUND         FUND       FUND       FUND      FUND    FUND
<S>                              <C>        <C>            <C>          <C>         <C>        <C>        <C>     <C>
 FINANCIAL INSTRUMENTS
 ------------------------------
   Invests in U.S. stocks           --           --                        --          --         --
   ----------------------------
   Invests in foreign stocks        --           --                                    --         --
   ----------------------------
   Invests in investment grade
   debt securities                  --           --            --          --          --         --        --      --
   ----------------------------
   Invests in non-investment
   grade debt securities                         --            --                      --         --        --
   ----------------------------
   Invests in foreign debt
   securities                                    --            --                      --         --        --      --
   ----------------------------
   Invests in futures contracts                                --
   ----------------------------
   Invests in forward currency
   contracts                                                   --
   ----------------------------
   Invests in asset-backed
   securities                                                                                               --      --
   ----------------------------
   Invests in mortgage-related
   securities                       --                         --                                           --      --
   ----------------------------
   Invests in real estate
   investment trusts (REITs)                                                           --
   ----------------------------
 INVESTMENT TECHNIQUES
 ------------------------------
   Emphasizes securities of
   small cap companies              --
   ----------------------------
   Emphasizes securities of mid
   cap companies                                                           --
   ----------------------------
   Emphasizes securities of
   large cap companies                                                     --          --         --
   ----------------------------
   Emphasizes undervalued
   stocks                           --                                     --          --
   ----------------------------
   Invests in securities of
   emerging markets countries       --           --            --                      --         --
   ----------------------------
   Emphasizes dividend-paying
   common stocks                                                                       --
   ----------------------------
   Invests in short-term
   debt securities                                                         --                                       --
   ----------------------------
</TABLE>
    
 
   
Additional Information About Fund Investments
    
 
   
FOREIGN COMPANIES.  A foreign company is organized under the
laws of a foreign country and:
    
 
   
     O Has the principal trading market for its stock in a
       foreign country
    
 
   
     O Derives at least 50% of its revenues or profits from
       operations in foreign countries or has at least 50% of
       its assets located in foreign countries
    
<PAGE>   40
 
  INVESTMENT STRATEGIES
  AND RISKS
 
                                                                              40
 
                        [ICON]TOUCHSTONE FAMILY OF FUNDS
 
   
AMERICAN DEPOSITORY RECEIPTS.  American Depository Receipts (ADRs) are
securities that represent an ownership interest in a foreign security. They are
generally issued by a U.S. bank to U.S. buyers as a substitute for direct
ownership of the foreign security and are traded on U.S. exchanges.
    
 
INVESTMENT GRADE SECURITIES.  Investment grade securities are generally rated
BBB or better by Standard & Poor's Rating Service (S&P) or Baa or better by
Moody's Investor Service, Inc. (Moody's).
 
NON-INVESTMENT GRADE SECURITIES.  Non-investment grade securities are higher
risk, lower quality securities, often referred to as "junk bonds" and are
considered speculative. They are rated by S&P as less than BBB or by Moody's as
less than Baa.
 
ASSET-BACKED SECURITIES.  Asset-backed securities represent groups of other
assets, for example credit card receivables, that are combined or pooled for
sale to investors.
 
MORTGAGE-RELATED SECURITIES.  Mortgage-related securities represent groups of
mortgage loans that are combined for sale to investors. The loans may be grouped
together by:
 
     O The Government National Mortgage Association (GNMA)
 
     O The Federal National Mortgage Association (FNMA)
 
     O The Federal Home Loan Mortgage Corporation (FHLMC)
 
     O Commercial banks
 
     O Savings and loan institutions
 
     O Mortgage bankers
 
     O Private mortgage insurance companies
 
REAL ESTATE INVESTMENT TRUSTS.  Real estate investment trusts (REITs) pool
investors' money to invest primarily in income-producing real estate or real
estate-related loans or interests.
 
"LARGE CAP" AND "MID CAP" COMPANIES.  A large cap company has a market
capitalization of more than $5 billion. A mid cap company has a market
capitalization of between $1 billion and $5 billion.
 
EMERGING GROWTH COMPANIES.  Emerging Growth Companies are companies that have:
 
     O A total market capitalization less than that of the average of the
       companies in the Standard & Poor's 500 Composite Stock Price Index (S&P
       500)
 
     O Earnings that the portfolio managers believe may grow faster than the
       U.S. economy in general due to new products, management changes at the
       company or economic shocks such as high inflation or sudden increases or
       decreases in interest rates
<PAGE>   41
 
  INVESTMENT STRATEGIES
  AND RISKS
 
41
 
                        [ICON]TOUCHSTONE FAMILY OF FUNDS
 
EMERGING MARKET SECURITIES.  Emerging Market Securities are
issued by a company that:
 
   
     O Is organized under the laws of an emerging market
       country (any country other than Australia, Austria,
       Belgium, Canada, Denmark, Finland, France, Germany,
       Holland, Italy, Japan, Luxembourg, New Zealand,
       Norway, Spain, Sweden, Switzerland, the United Kingdom
       and the United States)
    
 
   
     O Has its principal trading market for its stock in an
       emerging market country
    
 
   
     O Derives at least 50% of its revenues or profits from
       operations within emerging market countries or has at
       least 50% of its assets located in emerging market
       countries
    
 
   
UNDERVALUED STOCKS.  A stock is considered undervalued if the
portfolio manager believes it should be trading at a higher
price than it is at the time of purchase. Factors considered
are:
    
 
   
     O Price relative to earnings
    
 
   
     O Price relative to cash flow
    
 
   
     O Price relative to financial strength
    
 
   
REPURCHASE AGREEMENTS.  Repurchase Agreements are
collateralized by obligations issued or guaranteed as to both
principal and interest by the U.S. Government, its agencies,
and instrumentalities. A repurchase agreement is a
transaction in which a security is purchased with a
simultaneous commitment to sell it back to the seller (a
commercial bank or recognized securities dealer) at an agreed
upon price on an agreed upon date. This date is usually not
more than seven days from the date of purchase. The resale
price reflects the purchase price plus an agreed upon market
rate of interest, which is unrelated to the coupon rate or
maturity of the purchased security.
    
 
   
How Can I Tell, at a Glance, a Fund's Key Risks?
    
 
   
The following table shows some of the main risks to which
each Fund is subject. Each risk is described in detail below:
    
 
<TABLE>
<CAPTION>
                                 EMERGING   INTERNATIONAL    INCOME                  GROWTH                       STANDBY
                                  GROWTH       EQUITY      OPPORTUNITY  VALUE PLUS  & INCOME   BALANCED    BOND   INCOME
                                   FUND         FUND          FUND         FUND       FUND       FUND      FUND    FUND
<S>                              <C>        <C>            <C>          <C>         <C>        <C>        <C>     <C>
 MARKET RISK                        --           --                        --          --         --
 ------------------------------
   Emerging Growth Companies        --
   ----------------------------
   Real Estate Investment
    Trusts                                                                             --
   ----------------------------
 INTEREST RATE RISK                 --           --            --          --          --         --        --      --
 ------------------------------
   Mortgage-Related Securities      --                         --                                           --      --
   ----------------------------
 CREDIT RISK                        --           --            --          --          --         --        --      --
 ------------------------------
   Non-Investment Grade
    Securities                                   --            --                      --         --        --
   ----------------------------
 FOREIGN INVESTING RISK             --           --            --                      --         --        --      --
 ------------------------------
   Emerging Market Risk             --           --            --                      --         --
   ----------------------------
   Political Risk                                --            --
   ----------------------------
</TABLE>
<PAGE>   42
 
  INVESTMENT STRATEGIES
  AND RISKS
 
                                                                              42
 
                        [ICON]TOUCHSTONE FAMILY OF FUNDS
 
   
Risks of Investing in the Funds
    
 
MARKET RISK.  A Fund that invests in common stocks is subject to stock market
risk. Stock prices in general may decline over short or even extended periods,
regardless of the success or failure of a particular company's operations. Stock
markets tend to run in cycles, with periods when stock prices generally go up
and periods when they generally go down. Common stock prices tend to go up and
down more than those of bonds.
 
   
     O Emerging Growth Companies. Investment in Emerging Growth Companies is
       subject to enhanced risks because such companies generally have limited
       product lines, markets or financial resources and often exhibit a lack of
       management depth. The securities of such companies can be difficult to
       sell and are usually more volatile than securities of larger, more
       established companies.
    
 
   
     O Real Estate Investment Trusts (REITs). Investment in REITs is subject to
       risks similar to those associated with the direct ownership of real
       estate (in addition to securities markets risks). REITs are sensitive to
       factors such as changes in real estate values and property taxes,
       interest rates, cash flow of underlying real estate assets, supply and
       demand, and the management skill and creditworthiness of the issuer.
       REITs may also lose value due to changes in tax or other regulatory
       requirements.
    
 
INTEREST RATE RISK.  A Fund that invests in debt securities is subject to the
risk that the market value of the debt securities will decline because of rising
interest rates. The prices of debt securities are generally linked to the
prevailing market interest rates. In general, when interest rates rise, the
prices of debt securities fall, and when interest rates fall, the prices of debt
securities rise. The price volatility of a debt security also depends on its
maturity. Generally, the longer the maturity of a debt security the greater its
sensitivity to changes in interest rates. To compensate investors for this
higher risk, debt securities with longer maturities generally offer higher
yields than debt securities with shorter maturities.
 
   
     O Mortgage-Related Securities. Payments from the pool of loans underlying a
       mortgage-related security may not be enough to meet the monthly payments
       of the mortgage-related security. If this occurs the mortgage-related
       security will lose value. Also, prepayments of mortgages or mortgage
       foreclosures will shorten the life of the pool of mortgages underlying a
       mortgage-related security and will affect the average life of the
       mortgage-related securities held by a Fund. Mortgage prepayments vary
       based on several factors including the level of interest rates, general
       economic conditions, the location and age of the mortgage and other
       demographic conditions. In periods of falling interest rates, there are
       usually more prepayments. The reinvestment of cash received from
       prepayments will, therefore, usually be at a lower interest rate than the
       original investment, lowering a Fund's yield. Mortgage-related securities
       may be less likely to increase in value during periods of falling
       interest rates than other debt securities.
    
<PAGE>   43
 
  INVESTMENT STRATEGIES
  AND RISKS
 
43
 
                        [ICON]TOUCHSTONE FAMILY OF FUNDS
 
CREDIT RISK.  The debt securities in a Fund's portfolio are subject to credit
risk. Credit risk is the possibility that an issuer will fail to make timely
payments of interest or principal. Securities rated in the lowest category of
investment grade securities have some risky characteristics and changes in
economic conditions are more likely to cause issuers of these securities to be
unable to make payments.
 
   
     O Non-Investment Grade Securities. Non-investment grade securities are
       sometimes referred to as junk bonds and are very risky with respect to
       their issuers' ability to make payments of interest and principal. There
       is a high risk that a Fund which invests in non-investment grade
       securities could suffer a loss caused by the default of an issuer of such
       securities. Part of the reason for this high risk is that, in the event
       of a default or bankruptcy, holders of non-investment grade securities
       generally will not receive payments until the holders of all other debt
       have been paid. In addition, the market for non-investment grade
       securities has, in the past, had more frequent and larger price changes
       than the markets for other securities. Non-investment grade securities
       can also be more difficult to sell for good value.
    
 
FOREIGN INVESTING.  Investing in foreign securities poses unique risks such as
fluctuation in currency exchange rates, market illiquidity, price volatility,
high trading costs, difficulties in settlement, regulations on stock exchanges,
limits on foreign ownership, less stringent accounting, reporting and disclosure
requirements, and other considerations. In the past, equity and debt instruments
of foreign markets have had more frequent and larger price changes than those of
U.S. markets.
 
     O Emerging Markets Risk.  Investments in a country that is still relatively
       underdeveloped involves exposure to economic structures that are
       generally less diverse and mature than in the U.S. and to political and
       legal systems which may be less stable. In the past, markets of
       developing countries have had more frequent and larger price changes than
       those of developed countries.
 
     O Political Risk. Political risk includes a greater potential for revolts,
       and the taking of assets by governments. For example, a Fund may invest
       in Eastern Europe and former states of the Soviet Union. These countries
       were under communist systems that took control of private industry. This
       could occur again in this region or others in which a Fund may invest, in
       which case the Fund may lose all or part of its investment in that
       country's issuers.
<PAGE>   44
 
  THE FUNDS' MANAGEMENT
 
                                                                              44
 
THE FUNDS' MANAGEMENT   [ICON]TOUCHSTONE FAMILY OF FUNDS
 
Investment Advisor
 
Touchstone Advisors, Inc., (the Advisor or Touchstone Advisors) located at 311
Pike Street, Cincinnati, Ohio 45202 is the investment advisor of the Funds.
 
Touchstone Advisors has been registered as an investment advisor under the
Investment Advisers Act of 1940, as amended (the Advisers Act) since 1994. As of
June 30, 1998, Touchstone Advisors had $361 million in assets under management.
 
Touchstone Advisors is responsible for selecting Fund Sub-Advisors who have
shown good investment performance in their areas of expertise. The Board of
Trustees of the Trust reviews and must approve the Advisor's selections.
Touchstone considers various factors in evaluating Fund Sub-Advisors, including:
 
     O Level of knowledge and skill
 
     O Performance as compared to its peers or benchmark
 
     O Consistency of performance over five years or more
 
     O Level of compliance with investment rules and strategies
 
     O Employees, facilities and financial strength
 
     O Quality of service
 
Touchstone will also continually monitor each Fund Sub-Advisor's performance
through various analyses and through in-person, telephone and written
consultations with the Fund Sub-Advisors.
 
Touchstone discusses its expectations for performance with each Fund Sub-
Advisor. Touchstone provides written evaluations and recommendations to the
Board of Trustees, including whether or not each Fund Sub-Advisor's contract
should be renewed, modified or terminated.
 
Touchstone is also responsible for running all of the operations of the Funds,
except for those that are subcontracted to the Fund Sub-Advisors, custodian,
transfer agent and administrator.
 
Two or more Fund Sub-Advisors may manage a Fund, with each managing a portion of
the Fund's assets. If a Fund has more than one Fund Sub-Advisor, Touchstone
allocates how much of a Fund's assets are managed by each Sub-Advisor.
Touchstone may change these allocations from time to time, often based upon the
results of the evaluations of the Fund Sub-Advisors.
 
Each Fund pays Touchstone a fee for its services.  Out of this fee Touchstone
pays each Fund Sub-Advisor a fee for its services.
<PAGE>   45
 
  THE FUNDS' MANAGEMENT
 
45
 
                        [ICON]TOUCHSTONE FAMILY OF FUNDS
 
   
The fee paid to Touchstone by each Fund is shown in the table below:
    
 
<TABLE>
<CAPTION>
                                                       FEE TO TOUCHSTONE
                                                       (AS % OF AVERAGE
                                                       DAILY NET ASSETS)
<S>                                                    <C>               <C>
                                 EMERGING GROWTH FUND        0.80%
- ----------------------------------------------------------------------------
                            INTERNATIONAL EQUITY FUND        0.95%
- ----------------------------------------------------------------------------
                              INCOME OPPORTUNITY FUND        0.65%
- ----------------------------------------------------------------------------
                                      VALUE PLUS FUND        0.75%
- ----------------------------------------------------------------------------
                                 GROWTH & INCOME FUND        0.80%
- ----------------------------------------------------------------------------
                                        BALANCED FUND        0.80%
- ----------------------------------------------------------------------------
                                            BOND FUND        0.55%
- ----------------------------------------------------------------------------
                                  STANDBY INCOME FUND        0.25%
- ----------------------------------------------------------------------------
</TABLE>
 
Fund Sub-Advisors
 
The Fund Sub-Advisors make the day-to-day decisions regarding buying and selling
specific securities for a Fund. Each Fund Sub-Advisor manages the investments
held by the Fund it serves according to the applicable investment goals and
strategies.
 
David L. Babson & Company, Inc. (Babson)
 
One Memorial Drive, Cambridge, MA 02142-1300
 
     Fund Sub-Advisor to the Emerging Growth Fund
 
Babson has been registered as an investment advisor under the Advisers Act since
1940. Babson provides investment advisory services to individual and
institutional clients. As of June 30, 1998, Babson and affiliates had assets
under management of $21.1 billion. Babson has been managing the Emerging Growth
Fund since the Fund's inception.
 
Dennis J. Scannell , Peter C. Schliemann and Lance F. James have primary
responsibility for the day-to-day management of the Fund. Mr. Scannell has been
with the firm since 1993, Mr. Schliemann has been with Babson since 1979, and
Mr. James has been with the firm since 1986.
 
Westfield Capital Management Company, Inc. (Westfield)
 
One Financial Center, Boston, MA 02111
 
     Fund Sub-Advisor to the Emerging Growth Fund
 
Westfield has been registered as an investment advisor under the Advisers Act
since 1989. Westfield provides investment advisory services to individual and
institutional clients. As of June 30, 1998, Westfield had assets under
management of $1.5 billion. Westfield has been managing the Emerging Growth Fund
since the Fund's inception.
 
Michael J. Chapman has managed the portion of the Emerging Growth Fund's assets
allocated to Westfield by the Advisor since October, 1994. Mr. Chapman (CFA) has
been with Westfield since 1990.
<PAGE>   46
 
  THE FUNDS' MANAGEMENT
 
                                                                              46
 
                        [ICON]TOUCHSTONE FAMILY OF FUNDS
 
   
Credit Suisse Asset Management (Credit Suisse)
    
 
One Citicorp Center, 153 East 53rd Street, New York, NY 10022
     Fund Sub-Advisor to the International Equity Fund
 
   
Credit Suisse has been registered as an investment advisor under the Advisers
Act since 1968. Credit Suisse provides investment advisory services to
individual and institutional clients. As of June 30, 1998, Credit Suisse had
assets under management of $35.6 billion. Credit Suisse has been managing the
International Equity Fund since the Fund's inception.
    
 
   
The Fund is managed by the Credit Suisse International Equity Management Team.
The team consists of William Sterling, Richard Watt, Steven D. Bleiberg, Susan
Boland, Emily Alejos and Robert B. Hrabchak.
    
 
Alliance Capital Management L.P. (Alliance)
 
1345 Avenue of the Americas, New York, NY 10105
 
     Fund Sub-Advisor to the Income Opportunity Fund
 
Alliance has been registered as an investment advisor under the Advisers Act
since 1971. Alliance provides investment advisory services to individual and
institutional clients. As of June 30, 1998, Alliance had assets under management
of $263 billion. Alliance has been managing the Income Opportunity Fund since
the Fund's inception.
 
Wayne Lyski and Vicki Fuller have primary responsibility for the day-to-day
management of the Fund. Mr. Lyski has been with Alliance since 1983. Ms. Fuller
(CPA) has been with Alliance, and its predecessors, since 1985.
 
Fort Washington Investment Advisors, Inc. (Fort Washington)
 
420 East Fourth Street, Cincinnati, OH 45202
 
     Fund Sub-Advisor to the Value Plus Fund, Bond Fund, and Standby Income Fund
 
Fort Washington has been registered as an investment advisor under the Advisers
Act since 1990. Fort Washington provides investment advisory services to
individual and institutional clients. As of June 30, 1998, Fort Washington had
assets under management of $9.8 billion. Fort Washington has been managing the
Value Plus Fund, the Bond Fund and the Standby Income Fund since each Fund's
inception.
 
VALUE PLUS FUND: John C. Holden has managed the Value Plus Fund since May 1998.
Mr. Holden (CFA) joined Fort Washington in May 1997 and is Vice President and
Senior Portfolio Manager. Mr. Holden previously served as senior portfolio
manager with Mellon Private Asset Management in Pittsburgh, senior portfolio
manager and investment analyst for Star Bank's Stellar Performance Group in
Cincinnati, and senior employee benefit portfolio manager for First Kentucky
Trust Company in Louisville.
 
BOND FUND: Roger Lanham and Brendan White have managed the Bond Fund since
October, 1994. Mr. Lanham is a CFA and has been with Fort Washington since 1980.
Mr. White is a CFA and has been with Fort Washington since 1993.
<PAGE>   47
 
  THE FUNDS' MANAGEMENT
 
47
 
                        [ICON]TOUCHSTONE FAMILY OF FUNDS
 
STANDBY INCOME FUND: Christopher J. Mahony has managed the Standby Income Fund
since October 1994. Mr. Mahony joined Fort Washington in 1994 after eight years
of investment experience with Neuberger & Berman.
 
Fort Washington is an affiliate of Touchstone. Therefore, Touchstone may have a
conflict of interest when making decisions to keep Fort Washington as a Fund
Sub-Advisor. The Board of Trustees reviews all of Touchstone's decisions to
reduce the possibility of a conflict of interest situation.
 
Scudder Kemper Investments, Inc. (Scudder Kemper)
 
   
345 Park Avenue, New York, NY 10154
    
 
   
     Fund Sub-Advisor to the Growth & Income Fund
    
 
Scudder Kemper and its predecessors have provided investment advisory services
to mutual fund investors, retirement and pension plans, institutional and
corporate clients, insurance companies, and private family and individual
accounts since 1943. As of June 30, 1998, Scudder Kemper had assets under
management of $235 billion. Scudder Kemper has been managing the Growth & Income
Fund since June 1997.
 
Robert T. Hoffman, Lori Ensinger, Benjamin W. Thorndike and Kathleen T. Millard
have primary responsibility for the day-to-day management of the Fund. Mr.
Hoffman, Lead Product Manager, joined Scudder in 1990. He has 13 years of
experience in the investment industry, including several years of pension fund
management experience. Lori Ensinger, Lead Portfolio Manager, focuses on stock
selection and investment strategy. She has been a portfolio manager since 1983
and joined Scudder in 1993. Benjamin W. Thorndike, Portfolio Manager, is the
Fund's chief analyst and strategist for convertible securities. Mr. Thorndike,
who has 18 years of investment experience, joined Scudder in 1983. Kathleen T.
Millard, Portfolio Manager, has worked as a portfolio manager since 1986. Ms.
Millard, who joined Scudder in 1991, focuses on strategy and stock selection.
 
OpCap Advisors (OpCap)
 
Oppenheimer Tower, One World Financial Center, New York, NY 10281
 
     Fund Sub-Advisor to the Balanced Fund
 
OpCap is a subsidiary of Oppenheimer Capital. Oppenheimer Capital has been
registered as an investment advisor under the Advisers Act since 1968 and its
employees perform all investment advisory services provided to the Fund. As of
June 30, 1998, Oppenheimer Capital and its subsidiaries had assets under
management of $67.3 billion. OpCap has been managing the Balanced Fund since May
1997.
 
   
Alan Gutmann has managed the equity portion of the Balanced Fund since 1997.
Robert J. Bluestone and Matthew Greenwald have managed the fixed-income portion
of the Balanced Fund since 1997. Mr. Gutmann joined Oppenheimer Capital in 1991
and is Vice President. Mr. Bluestone joined Oppenheimer Capital in 1986 and is
Managing Director. Mr. Greenwald joined Oppenheimer Capital in 1989 and is Vice
President.
    
<PAGE>   48
 
  INVESTING WITH TOUCHSTONE
 
                                                                              48
 
                        [ICON]TOUCHSTONE FAMILY OF FUNDS
                   INVESTING WITH TOUCHSTONE
 
                   Opening An Account
 
   
                   CHOOSING THE APPROPRIATE FUNDS TO MATCH YOUR
                   GOALS.  Investing well requires a plan. We recommend that you
                   meet with your financial advisor to plan a strategy that will
                   best meet your financial goals.
    
 
   
                   You should read this Prospectus carefully and then determine
                   how much you want to invest. Check below to find the minimum
                   investment amount required for each Class of shares as well
                   as to learn about the various ways you can purchase your
                   shares:
    
 
<TABLE>
<CAPTION>
                                                                CLASS A                   CLASS C
                                                         INITIAL     ADDITIONAL    INITIAL     ADDITIONAL
                                                        INVESTMENT   INVESTMENT   INVESTMENT   INVESTMENT
<S>                                                     <C>          <C>          <C>          <C>
                                       REGULAR ACCOUNT     $500         $50         $1,000        $50
- ---------------------------------------------------------------------------------------------------------
  RETIREMENT PLAN ACCOUNT OR CUSTODIAL ACCOUNT UNDER A
       UNIFORM GIFTS/TRANSFERS TO MINORS ACT ("UGTMA")     $250         $50         $  250        $50
- ---------------------------------------------------------------------------------------------------------
     INVESTMENTS THROUGH THE AUTOMATIC INVESTMENT PLAN
                    OR THROUGH THE DIRECT DEPOSIT PLAN     $ 50         $50         $   50        $50
- ---------------------------------------------------------------------------------------------------------
</TABLE>
 
   
                        O Investor Alert: Touchstone could change these initial
                          and additional investment minimums at any time.
    
 
   
                   Investing in the Funds
    
 
   
                   You can contact your financial advisor to purchase shares of
                   the Funds.
    
 
   
                   You may also purchase shares of any Fund directly from
                   Touchstone. In any event, you must complete a New Account
                   Application Form. You may obtain account applications from
                   Touchstone or your financial advisor.
    
 
   
                        O Investor Alert: Touchstone may choose to refuse any
                          purchase order.
    
 
   
                   Pricing of Fund Shares
    
 
   
                   Each Fund's share price, also called net asset value (NAV),
                   is determined as of the close of trading (normally 4:00 p.m.
                   Eastern time) every day the New York Stock Exchange (NYSE) is
                   open. The fund calculates the NAV per share, generally using
                   market prices, by dividing the total value of each class' net
                   assets by the number of the class shares outstanding. Shares
                   are purchased at the next offering price determined after
                   your purchase or sale order is received in proper form by
                   Touchstone. The offering price is the NAV plus a sales
                   charge, if applicable.
    
<PAGE>   49
 
  INVESTING WITH TOUCHSTONE
 
49
 
                        [ICON]TOUCHSTONE FAMILY OF FUNDS
 
The Fund's investments are valued based on market value or, if no market value
is available, based on fair value as determined by the Board of Trustees (or
under their direction). All assets and liabilities initially expressed in
foreign currency values will be converted into U.S. dollar values. Some specific
pricing strategies follow:
 
     O All short-term dollar-denominated investments that mature in 60 days or
       less are valued on the basis of amortized cost which the Board of
       Trustees has determined represents fair value.
 
     O Securities mainly traded on a U.S. exchange are valued at the last sale
       price on that exchange or, if no sales occurred during the day, at the
       current quoted bid price.
 
     O Securities mainly traded on a non-U.S. exchange are generally valued
       according to the preceding closing values on that exchange. However, if
       an event which may change the value of a security occurs after the time
       that the closing value on the non-U.S. exchange was determined, the Board
       of Trustees might decide to value the security based on fair value. This
       may cause the value of the security on the books of the fund to be
       significantly different from the closing value on the non-U.S. exchange
       and may affect the calculation of the NAV.
 
     O Because portfolio securities that are primarily listed on a non-U.S.
       exchange may trade on weekends or other days when a Fund does not price
       its shares, a Fund's NAV may change on days when shareholders will not be
       able to buy or sell shares.
 
Choosing a Class of Shares
 
Each of the Funds (other than the Standby Income Fund) offers Class A shares and
Class C shares. Each class of shares charges different sales charges and
distribution or service fees. The amount of sales charges and other fees you pay
will depend on which class of shares you decide to purchase.
 
Each Fund also offers Class Y shares. Class Y shares are only available for
purchase by pension plans.
 
The Standby Income Fund does not have share classes and it does not charge sales
charges, distribution fees or service fees. The Standby Income Fund may be
purchased by all investors.
 
Class A Shares
 
The offering price of each Class A share of a Fund is equal to its NAV plus a
front-end sales charge that you pay when you buy your shares. The front-end
sales charge is generally deducted from the amount of your investment.
 
The following tables show the amounts of the front-end sales charge you will pay
on purchases of Class A shares of each Fund as a percentage of (1) offering
price and (2) the net amount invested after the charge has been
<PAGE>   50
 
  INVESTING WITH TOUCHSTONE
 
                                                                              50
 
                        [ICON]TOUCHSTONE FAMILY OF FUNDS
 
subtracted. Note that the front-end sales charge gets lower as your investment
amount gets larger.
For Emerging Growth Fund, International Equity Fund, Value Plus Fund, Growth &
Income Fund and Balanced Fund
 
<TABLE>
<CAPTION>
                                   SALES CHARGE AS % OF     SALES CHARGE AS % OF
   AMOUNT OF YOUR INVESTMENT          OFFERING PRICE        NET AMOUNT INVESTED
<S>                                <C>                    <C>
                   UNDER $50,000           5.75%                    6.10%
- ----------------------------------------------------------------------------------
  $50,000 BUT LESS THAN $100,000           4.50%                    4.71%
- ----------------------------------------------------------------------------------
 $100,000 BUT LESS THAN $250,000           3.50%                    3.63%
- ----------------------------------------------------------------------------------
 $250,000 BUT LESS THAN $500,000           2.50%                    2.56%
- ----------------------------------------------------------------------------------
       $500,000 BUT LESS THAN $1
                         MILLION           2.00%                    2.04%
- ----------------------------------------------------------------------------------
              $1 MILLION OR MORE           0.00%                    0.00%
- ----------------------------------------------------------------------------------
</TABLE>
 
For Income Opportunity Fund and Bond Fund
 
<TABLE>
<CAPTION>
                                   SALES CHARGE AS % OF     SALES CHARGE AS % OF
   AMOUNT OF YOUR INVESTMENT          OFFERING PRICE        NET AMOUNT INVESTED
<S>                                <C>                    <C>
                   UNDER $25,000           4.75%                    4.99%
- ----------------------------------------------------------------------------------
   $25,000 BUT LESS THAN $50,000           4.50%                    4.71%
- ----------------------------------------------------------------------------------
  $50,000 BUT LESS THAN $100,000           4.00%                    4.17%
- ----------------------------------------------------------------------------------
 $100,000 BUT LESS THAN $250,000           3.50%                    3.63%
- ----------------------------------------------------------------------------------
 $250,000 BUT LESS THAN $500,000           2.50%                    2.56%
- ----------------------------------------------------------------------------------
       $500,000 BUT LESS THAN $1
                         MILLION           2.00%                    2.04%
- ----------------------------------------------------------------------------------
              $1 MILLION OR MORE           0.00%                    0.00%
- ----------------------------------------------------------------------------------
</TABLE>
 
There is no front-end sales charge if you invest $1 million or more in the
Funds. This includes large total purchases made through programs such as
Aggregation, Concurrent Purchases, Letters of Intent and Rights of Accumulation.
These programs are described more fully in the Statement of Additional
Information (SAI). In addition, there is no front-end sales charge on purchases
by certain persons related to the Fund or its service providers and certain
other persons listed in the Statement of Additional Information.
 
If you redeem shares that you purchased as part of the $1 million purchase
within one year, you will pay a contingent deferred sales charge (a sales charge
you pay when you redeem your shares) of 1% on the shares redeemed.
 
Each Fund (other than the Standby Income Fund) has adopted a distribution and
service plan under Rule 12b-1 of the Investment Company Act of 1940, as amended
(the 1940 Act) for its Class A shares. This plan allows each
<PAGE>   51
 
  INVESTING WITH TOUCHSTONE
 
51
 
                        [ICON]TOUCHSTONE FAMILY OF FUNDS
 
Fund to pay distribution and other fees for the sale and distribution of its
Class A shares and for services provided to holders of Class A shares.
Under the plan, each Fund pays an annual fee of up to 0.25% of the average daily
net assets of the Fund that are attributable to Class A shares. Because these
fees are paid out of the Fund's assets on an ongoing basis, these fees will
increase the cost of your investment.
 
Class C Shares
 
The offering price of each Class C share is equal to its NAV. No front-end sales
charge is applied at the time of purchase. All of your investment money goes to
work for you immediately. However, a contingent deferred sales charge of 1% of
the offering price will be charged on shares redeemed within one year after you
purchased them.
 
No contingent deferred sales charge is applied if:
 
     O The shares which you redeem were acquired through the reinvestment of
       dividends or capital gains distributions
 
     O The amount redeemed resulted from increases in the value of the account
       above the amount of the total purchase payments
 
When we determine whether a contingent deferred sales charge is payable on a
redemption, we assume that:
 
     O The redemption is made first from amounts free of any contingent deferred
       sales charge; then
 
     O From the earliest purchase payments(s) that remain invested in the Funds
 
When we determine if amounts are available for redemption free of any contingent
deferred sales charge, we:
 
     O Add together all of your original purchase payments
 
     O Subtract any amounts previously withdrawn; then
 
     O Check if there is any remaining amount free of any contingent deferred
       sales charge that can be applied to the total of the current value of the
       shares you have asked to redeem
 
There is no contingent deferred sales charge on purchases by certain persons
related to the Fund or its service providers and certain other parties.
 
Each Fund (other than the Standby Income Fund) has adopted a distribution and
service plan under Rule 12b-1 of the 1940 Act for its Class C shares. This plan
allows each Fund to pay distribution and other fees for the sale and
distribution of its Class C shares and for services provided to holders of Class
C shares.
 
Under the plan, each Fund pays an annual fee of up to 1.00% of the average daily
net assets of the Fund that are attributable to Class C shares. Because these
fees are paid out of the Fund's assets on an ongoing basis, these fees will
increase the cost of your investment and over time may cost you more than paying
other types of sales charges.
<PAGE>   52
 
  INVESTING WITH TOUCHSTONE
 
                                                                              52
 
                        [ICON]TOUCHSTONE FAMILY OF FUNDS
 
                   Purchasing Your Shares
 
                   You can invest in the Fund shares in the following ways:
 
   
<TABLE>
<CAPTION>
                                                     OPENING AN ACCOUNT
<C>                             <S>
                                - Please make your check (in U.S. dollars) payable to the
                                Touchstone Family of Funds.
                                - Send your check with the completed account application to
                                the address shown on the application or to your financial
                                  advisor. Your application will be processed subject to
                    BY CHECK      your check clearing.
    
   
- ----------------------------
                                - First, telephone Touchstone at 800.669.2796 (PRESS 1)
                                between the hours of 8:00 a.m. and 4:00 p.m. Eastern time on
                                  a day when the NYSE is open for regular trading. When you
                                  call, you will receive an account number.
                                - Instruct your bank to transfer funds by wire to Touchstone
                                at the following address: Touchstone Family of Funds, c/o
                                  State Street Bank and Trust Company, P.O. Box 8518,
                                  Boston, Massachusetts 02266-8518, ABA Number 011000028,
                                  DDA Number 9905-036-1, Attention: Mutual Funds Division.
                                - Specify in the wire: (1) the name of the Fund, (2) the
                                account number which Touchstone assigned to you, and (3)
                                  your name. If Touchstone receives the federal funds before
                                  the close of regular trading of the NYSE on a day the NYSE
                                  is open for regular trading, you may purchase Fund shares
                     BY WIRE      as of that day.
    
   
- ----------------------------
                                - First, you should follow the procedures under "By Check"
                                or "By Wire" in order to get an account number for Fund(s)
                                  which you do not currently own shares of, but which you
                                  desire to exchange shares into.
                                - You may exchange your Fund shares for shares of the same
                                Class of another Fund (or of the Standby Income Fund)
                                  described in this Prospectus at their respective NAVs.
                                - You do not have to pay any exchange fee for these
                                exchanges.
                                - You should review the disclosure provided in this
                                Prospectus relating to the exchanged-for shares carefully
                 BY EXCHANGE      before making an exchange of your Fund shares.
    
   
- ----------------------------
                                You can begin the process of purchasing shares by wire or
                                arrange for an exchange of shares by calling Touchstone
                                In-Touch, Touchstone's automated response system, at
                                1.800.669.2796 and speaking to a customer service
                                representative (PRESS 1,1,3).
                                Touchstone In-Touch can also provide you with other
                BY TELEPHONE    information about the Funds such as daily share prices.
    
   
- ----------------------------
    
   
                                - You may invest in each Fund through various Retirement
                                Plans. The Funds' shares are designed for use with certain
                                  types of tax qualified retirement plans including defined
                                  benefit and defined contribution plans.
                                - For further information about any of the plans,
                                agreements, applications and annual fees, contact Touchstone
    THROUGH RETIREMENT PLANS      or your financial advisor.
    
   
- ----------------------------
</TABLE>
    
<PAGE>   53
 
  INVESTING WITH TOUCHSTONE
 
53
 
                        [ICON]TOUCHSTONE FAMILY OF FUNDS
 
   
<TABLE>
<CAPTION>
                                                   ADDING TO YOUR ACCOUNT
<C>                             <S>
                                - Complete the investment form provided at the bottom of a
                                recent account statement.
                                - Make your check payable to the Touchstone Family of Funds.
                                - Write your account number and asset allocation model
                                number, if applicable, on the check.
                                - Either: (1) Mail the check with the investment form in the
                                envelope provided with your account statement; or (2) Mail
                                  your check directly to your financial advisor at the
                                  address printed on your account statement. Your financial
                                  advisor is responsible for forwarding payment promptly to
                    BY CHECK      Touchstone.
    
   
- ----------------------------
                                - Refer to wire instructions for opening an account.
                                - Specify in the wire: (1) the name of the Fund, (2) the
                                account number which Touchstone assigned to you, and (3)
                                  your name. If Touchstone receives the federal funds before
                                  the close of regular trading of the New York Stock
                                  Exchange (NYSE) on a day the NYSE is open for regular
                     BY WIRE      trading, you may purchase Fund shares as of that day.
    
   
- ----------------------------
                                - You may exchange your Fund shares for shares of the same
                                Class of another Fund (or of the Standby Income Fund)
                                  described in this Prospectus at their respective NAVs.
                                - You do not have to pay any exchange fee for these
                                exchanges.
                                - You should review the disclosure provided in this
                                Prospectus relating to the exchanged-for shares carefully
                 BY EXCHANGE      before making an exchange of your Fund shares.
    
   
- ----------------------------
                                You can arrange for an exchange of shares by calling
                                Touchstone In-Touch, Touchstone's automated response system,
                                at 1.800.669.2796 and speaking to a customer service
                                representative (PRESS 1,1,3).
                                Touchstone In-Touch can also provide you with other
                BY TELEPHONE    information about the Funds such as daily share prices.
    
   
- ----------------------------
    
   
                                - You may add to your account in each Fund through various
                                Retirement Plans. For further information contact Touchstone
    THROUGH RETIREMENT PLANS      or your financial advisor.
    
   
- ----------------------------
</TABLE>
    
 
   
More Information About Wire Transfers.
    
 
   
You may invest in the Funds directly by wire transfers.
Contact your bank and request it to wire federal funds to
Touchstone. Banks may charge a fee for handling wire
transfers. You should contact Touchstone or your financial
advisor for further instructions.
    
<PAGE>   54
 
  INVESTING WITH TOUCHSTONE
 
                                                                              54
 
                        [ICON]TOUCHSTONE FAMILY OF FUNDS
   
???SPECIAL TAX CONSIDERATION
    
- ---------------------------
For federal income tax purposes, an exchange of shares is treated as a sale
of the shares and a purchase of the shares you receive in exchange.
Therefore, you may incur a taxable gain or loss in connection with the
exchange.
   
???SPECIAL TAX CONSIDERATION
    
- ---------------------------
To determine which type of Retirement Plan is appropriate for you, please
contact your tax advisor.
 
   
More Information About Exchanges.
    
 
For exchanges from the Standby Income Fund, which has no sales charge associated
with it, the applicable sales charges on the Fund being purchased will apply.
The exception would be if those Standby Income Fund shares were acquired by an
exchange from a Fund which does have a sales charge or by reinvestment or
cross-reinvestment of dividends or capital gains distributions.
 
   
More Information About Retirement Plans.
    
 
Retirement Plans may include the following:
 
Individual Retirement Plans
 
     O Traditional Individual Retirement Accounts (IRAs)
 
     O Savings Incentive Match Plan for Employees (SIMPLE) IRAs
 
     O Roth Individual Retirement Accounts (Roth IRAs)
 
     O Education Individual Retirement Accounts (Education IRAs)
 
     O Simplified Employee Pension Plan (SEP IRAs)
 
     O 403(b) Tax Sheltered Accounts that employ as custodian a bank acceptable
       to the Distributor
 
Employer Sponsored Retirement Plans
 
     O Defined benefit plans
 
     O Defined contribution plans (including 401K plans, profit sharing plans
       and money purchase plans)
     O 457 Plans
Automatic Investment Options
The various ways that you can invest in the Funds are outlined below. Touchstone
does not charge any fees for these services.
AUTOMATIC INVESTMENT PLAN.  You can pre-authorize monthly or quarterly
investments of $50 or more in each Fund to be processed electronically from a
checking or savings account. You will need to complete the appropriate forms to
do this. See the account application for further details about this service or
call Touchstone at 800.669.2796 (press 1).
REINVESTMENT/CROSS REINVESTMENT.  Dividends and capital gains can be
automatically reinvested in the Fund that pays them or another Fund within the
same class of shares without a fee or sales charge. Dividends and capital gains
will be reinvested in the Fund that pays them, unless you indicate otherwise on
your account application. You may also choose to have your dividends or capital
gains paid to you in cash.
<PAGE>   55
 
  INVESTING WITH TOUCHSTONE
 
55
 
                        [ICON]TOUCHSTONE FAMILY OF FUNDS
 
   
DIRECT DEPOSIT PURCHASE PLAN.  You may automatically invest Social Security
checks, private payroll checks, pension payouts or any other pre-authorized
government or private recurring payments in our Funds. This occurs on a monthly
basis and the minimum investment is $50.
    
 
   
DOLLAR COST AVERAGING.  Touchstone's Dollar Cost Averaging program allows you to
diversify your investments by investing the same amount on a regular basis. You
can set up periodic automatic transfers of at least $50 from one Touchstone Fund
to any other. The applicable sales charge, if any, will be assessed.
    
 
   
PROCESSING ORGANIZATIONS.  You may also purchase shares of the Funds through a
"Processing Organization", (e.g. a mutual fund supermarket) which is a
broker-dealer, bank or other financial institution that purchases shares for its
customers. Some of the Funds have authorized certain Processing Organizations to
receive purchase and sales orders on their behalf. Before investing in the Funds
through a Processing Organization, you should read any materials provided by the
Processing Organization in conjunction with this Prospectus.
    
 
When shares are purchased this way, there may be various differences. The
Processing Organization may:
 
   
     O Charge a fee for its services
    
 
   
     O Act as the shareholder of record of the shares
    
 
   
     O Set different minimum initial and additional investment requirements
    
 
   
     O Impose other charges and restrictions
    
 
   
     O Designate intermediaries to accept purchase and sales orders on the
       Funds' behalf
    
 
  Touchstone considers a purchase or sales order as received when an authorized
  Processing Organization, or its authorized designee, receives the order in
  proper form. These orders will be priced based on the Fund's NAV next computed
  after such order is received in proper form.
 
  Shares held through a Processing Organization may be transferred into your
  name following procedures established by your Processing Organization and
  Touchstone. Certain Processing Organizations may receive compensation from the
  Funds, Touchstone, the Advisor or their affiliates.
<PAGE>   56
 
  INVESTING WITH TOUCHSTONE
 
                                                                              56
 
                        [ICON]TOUCHSTONE FAMILY OF FUNDS
 
Selling Your Shares
 
You may sell some or all of your Fund shares on any day that the Fund calculates
its NAV. If your request is received in proper form before the close of regular
trading on the NYSE, you will receive a price based on that day's NAV for the
shares you sell. Otherwise, the price you receive will be based on the NAV that
is next calculated.
 
   
<TABLE>
<C>                <S>                                               <C>
 
                   - You can sell or exchange your shares over the
                     telephone, unless you have specifically
                     declined this option. If you do not wish to
                     have this ability, you must mark the
                     appropriate section of the New Account
                     Application Form.
                   - To sell your Fund shares by telephone call
                   Touchstone at 800.669.2796 (PRESS 1) or, from
                     outside the United States, 617.483.5000 ext.
                     6518. You can also send us a fax at
                     617.483.2354 between the hours of 8:00 a.m. and
                     4:00 p.m. Eastern time on a day when the NYSE
     BY TELEPHONE    is open for regular trading.
- ------------------------------------------------------------------------
                   - Write to Touchstone.
                   - Specify the name of the Fund.
                   - Indicate the number of shares or dollar amount
                   to be sold.
          BY MAIL  - Include your name and account number.
- ------------------------------------------------------------------------
                   - Complete the appropriate information on the New
                     Account Application Form or fill out a
                     Touchstone Wire Transfer Form.
                   - If your proceeds are $1,000 or more, you may
                   request that the Transfer Agent wire them to your
                     bank account.
                   - You may also request wire transfer of your
                   proceeds in writing. Written requests should
                     include the name, location and ABA or bank
                     routing number (if known) of your designated
          BY WIRE    bank and your account number.
- ------------------------------------------------------------------------
                   - If a corporation, partnership, trust or
                   fiduciary requests the sale of shares, Touchstone
                     will require proof of their authority before
 BY A THIRD PARTY    shares are sold.
- ------------------------------------------------------------------------
    
   
                   - You may also sell shares by contacting your
                   financial advisor, who may charge you a fee for
                     this service. Shares held in street name must
     THROUGH YOUR    be sold through your financial advisor or, if
FINANCIAL ADVISOR    applicable, the Processing Organization.
    
   
- -----------------
</TABLE>
    
<PAGE>   57
 
  INVESTING WITH TOUCHSTONE
 
57
                        [ICON]TOUCHSTONE FAMILY OF FUNDS
   
???SPECIAL TAX CONSIDERATION
    
- ---------------------------
Selling your shares may cause you to incur a taxable gain or loss.
 
   
     O INVESTOR ALERT:  Unless otherwise specified, proceeds will be sent to the
       record owner at the address shown on Touchstone's records.
    
 
   
SIGNATURE GUARANTEES.  Some circumstances require that the request for the sale
of shares have a signature guarantee. A signature guarantee helps protect you
against fraud. You can obtain one from most banks or securities dealers, but not
from a notary public. Some circumstances requiring a signature guarantee
include:
    
 
     O Proceeds from the sale of shares that exceeds $50,000
 
     O Proceeds to be paid to a person other than the record owner
 
     O Proceeds to be sent to an address other than the address on the Transfer
       Agent's records
 
     O Proceeds to be paid to a corporation, partnership, trust or fiduciary
 
   
TELEPHONE SALES.  If we receive your share sale request before 4:00 p.m. Eastern
Time on a day when the NYSE is open for regular trading, the sale of your shares
will be processed that day. Otherwise it will occur on the next business day.
    
 
Interruptions in telephone service could prevent you from selling your shares in
this manner when you want to. When you have difficulty making telephone sales,
you should mail (or send by overnight delivery) a written request for sale of
your shares to Touchstone.
 
In order to protect your investment assets, Touchstone intends to only follow
instructions received by telephone that it reasonably believes to be genuine.
However, there is no guarantee that the instructions relied upon will always be
genuine and the Trust will not be liable for those cases. The Trust has certain
procedures to confirm that telephone instructions are genuine. If it does not
follow such procedures in a particular case it may be liable for any losses due
to unauthorized or fraudulent instructions. Some of these procedures include:
 
     O Requiring personal identification
 
     O Making checks payable only to the owner(s) of the account shown on the
       Trust's records
 
     O Mailing checks only to the account address shown on the Trust's records
 
     O Directing wires only to the bank account shown on the Trust's records
 
     O Providing written confirmation for transactions requested by telephone
 
     O Tape recording instructions received by telephone
 
   
SYSTEMATIC WITHDRAWAL PLAN.  You may elect to receive or send to a third party
monthly, quarterly or annual withdrawals of $50 or more if your account value is
at least $5,000. There is no special fee for this service and no minimum value
is required for retirement plans.
    
<PAGE>   58
 
  INVESTING WITH TOUCHSTONE
 
                                                                              58
                        [ICON]TOUCHSTONE FAMILY OF FUNDS
   
???SPECIAL TAX CONSIDERATION
    
- ---------------------------
If you exercise the Reinstatement Privilege, you should contact your tax
advisor.
   
???SPECIAL TAX CONSIDERATION
    
- ---------------------------
Involuntary sales may result in the sale of your Fund shares at a loss or may
result in taxable investment gains.
 
   
REINSTATEMENT PRIVILEGE.  You may reinvest proceeds from a sale of Fund shares
or a dividend or capital gain distribution on Fund shares without a sales charge
in any of the Funds. You may do so by sending a written request and a check to
Touchstone within 90 days after the date of the sale, dividend or distribution.
Reinvestment will be at the next NAV calculated after Touchstone receives your
request.
    
 
   
Low Account Balances
    
 
Touchstone may sell your Fund shares if your account balance falls below $500 as
a result of redemptions that you have made (as opposed to a reduction from
market changes). This involuntary sale does not apply to retirement accounts or
custodian accounts under the Uniform Gift to Minors Act (UGTMA). Touchstone will
let you know that your shares are about to be sold and you will have 30 days to
increase your account balance to more than $500.
 
   
Receiving Sale Proceeds
    
 
Touchstone will forward the proceeds of your sale to you (or to your financial
advisor) within seven days.
 
   
Proceeds Sent to Financial Advisors
    
 
Proceeds which are sent to your financial advisor will not usually be re-
invested for you unless you provide specific instructions to do so. Therefore,
the financial advisor may benefit from the use of your money.
 
   
Fund Shares Purchased by Check
    
 
If you purchase Fund shares by personal check, the proceeds of a sale of those
shares will not be sent to you until the check has cleared, which may take up to
15 days. If you may need your money more quickly, you should purchase shares by
federal funds, bank wire, or with a certified or cashier's check.
It is possible that the payments of your sale proceeds could be postponed or
your right to sell your shares could be suspended during certain circumstances.
These circumstances can occur:
     O When the NYSE is closed for other than customary weekends and holidays
     O When trading on the NYSE is restricted
     O When an emergency situation causes a Fund Sub-Advisor to not be
       reasonably able to dispose of certain securities or to fairly determine
       the value of its net assets
   
     O During any other time when the SEC, by order, permits.
    
<PAGE>   59
 
  INVESTING WITH TOUCHSTONE
 
59
 
                        [ICON]TOUCHSTONE FAMILY OF FUNDS
 
   
Check Writing -- Standby Income Fund Only
    
 
You may establish check writing privileges from your investment in the Standby
Income Fund. To do so, complete the New Account Application Form and pay the $5
fee per checkbook. You will then receive checks that you may use to draw against
your account. You will be charged $1 for each check presented for payment.
 
Checks may be payable to anyone you designate in the amount of $500 or more.
Checks must be signed as indicated on your Checking Account Signature Card
contained in the account application. You cannot write a check for an amount
larger than the value of your account (at the time the check is written).
Otherwise your check will be returned. You will continue to earn monthly
dividends on the funds until the check is presented for payment.
 
Checks cannot be presented in person to Touchstone. When a check is presented
for payment, Touchstone will sell a sufficient number of shares in your account
to cover the amount of the check. The check writing option can provide you with
easy access to your money, but it is not meant to be used as a regular checking
account.
 
   
  O SPECIAL TAX CONSIDERATION:  Since the share price of the Standby Income Fund
    may fluctuate daily, use of the check writing privilege can result in the
    sale of your shares at a profit or a loss from the time of your purchase.
    These sales of your Fund share may be considered a taxable event.
    
 
  O INVESTOR ALERT:  You should use the telephone or mail redemption procedures,
    rather than a check, to close your account.
 
  O INVESTOR ALERT:  The check writing privilege may be modified or terminated
    at any time by the Trust or Transfer Agent upon notice to shareholders.
<PAGE>   60
 
  DISTRIBUTIONS AND TAXES
 
                                                                              60
 
DISTRIBUTIONS AND TAXES [ICON]TOUCHSTONE FAMILY OF FUNDS
   
???SPECIAL TAX CONSIDERATION
    
- ---------------------------
You should consult with your tax advisor to address your own tax situation.
 
Each Touchstone Fund intends to distribute to its shareholders substantially all
of its income and capital gains. The table below outlines when dividends are
declared and paid for each Fund:
 
<TABLE>
<CAPTION>
                                         DIVIDENDS DECLARED   DIVIDENDS PAID
                                         ------------------   --------------
<S>                                      <C>                  <C>
                    STANDBY INCOME FUND      Daily              Monthly
- ----------------------------------------------------------------------------
                  GROWTH & INCOME FUND,
                INCOME OPPORTUNITY FUND
                          AND BOND FUND     Monthly             Monthly
- ----------------------------------------------------------------------------
                        VALUE PLUS FUND
                      AND BALANCED FUND    Quarterly           Quarterly
- ----------------------------------------------------------------------------
                   EMERGING GROWTH FUND
          AND INTERNATIONAL EQUITY FUND    Annually            Annually
- ----------------------------------------------------------------------------
</TABLE>
 
Distributions of any capital gains earned by a Fund will be made at least
annually.
 
Tax Information
 
   
DISTRIBUTIONS.  Each Fund will make distributions that may be taxed as ordinary
income or capital gains (which may be taxed at different rates depending on the
length of time a Fund holds its assets). Each Fund's distributions may be
subject to federal income tax whether you reinvest such dividends in additional
shares of a Fund or choose to receive cash.
    
 
   
ORDINARY INCOME.  Income and short-term capital gains that are distributed to
you are taxable as ordinary income for federal income tax purposes regardless of
how long you have held your Fund shares.
    
 
   
LONG-TERM CAPITAL GAINS.  Long-term capital gains distributed to you are taxable
as long-term capital gains for federal income tax purposes regardless of how
long you have held your Fund shares.
    
 
   
STATEMENTS AND NOTICES.  You will receive an annual statement outlining the tax
status of your distributions. You will also receive written notices of certain
foreign taxes paid by the Funds and certain distributions paid by the Funds
during the prior taxable year.
    
<PAGE>   61
 
  FINANCIAL HIGHLIGHTS
 
61
 
FINANCIAL HIGHLIGHTS    [ICON]TOUCHSTONE FAMILY OF FUNDS
 
These financial highlights tables are intended to help you
understand the Funds' financial performance for the past 5 years
or, if shorter, the period of a Fund's operations. Certain
information reflects financial results for a single Fund share.
The total returns in the table represent the rate that an investor
would have earned or lost on an investment in the Fund (assuming
reinvestment of all dividends and distributions). This information
has been audited by PricewaterhouseCoopers LLP, whose report,
along with the Fund's financial statements, are incorporated by
reference in the Statement of Additional Information, which is
available upon request.
 
 The Emerging Growth Fund -- Class A
 
   
<TABLE>
<CAPTION>
                                                                                             FOR THE SIX
                                                                                            MONTHS ENDED
                                                                                            JUNE 30, 1998
               PERIOD ENDED                  12/31/94(A)   12/31/95   12/31/96   12/31/97    (UNAUDITED)
<S>                                          <C>           <C>        <C>        <C>        <C>
 Per Share Operating Performance
- -------------------------------------------
 Net Asset Value, Beginning of Period          $10.00       $10.11     $11.52     $11.55       $13.85
- -------------------------------------------
 Income From Investment Operations
- -------------------------------------------
 Net Investment Income                           0.16        (0.01)      0.01      (0.03)       (0.02)
- -------------------------------------------
 Net Gains or Losses on Securities (both
  realized and unrealized)                       0.11         2.29       1.20       3.71         0.73
- -------------------------------------------
 Total from Investment Operations                0.27         2.28       1.21       3.68         0.71
- -------------------------------------------
 Less Distributions
- -------------------------------------------
 Dividends (from net investment income)         (0.15)       (0.03)     (0.01)        --           --
- -------------------------------------------
 Distributions (from capital gains)             (0.01)       (0.84)     (1.17)     (1.38)          --
- -------------------------------------------
 Total Distributions                            (0.16)       (0.87)     (1.18)     (1.38)          --
- -------------------------------------------
 Net Asset Value, End of Period                $10.11       $11.52     $11.55     $13.85       $14.56
- -------------------------------------------
 Total Return (b)                                2.72%       22.56%     10.56%     32.20%        5.13%
- -------------------------------------------
 Ratios/Supplemental Data
 Net Assets, End of Period (000s)              $1,038       $2,520     $2,873     $4,949       $8,842
- -------------------------------------------
 Ratio of Expenses to Average Net Assets
  (c)                                            1.75%(e)     1.50%      1.50%      1.50%        1.50%(e)
- -------------------------------------------
 Ratio of Net Income to Average Net Assets
  (c)                                            6.10%(e)    (0.05%)    (0.12%)    (0.30%)      (0.36%)(e)
- -------------------------------------------
 Portfolio Turnover Rate                          150%         109%       117%       101%          33%
- -------------------------------------------
</TABLE>
    
<PAGE>   62
 
  FINANCIAL HIGHLIGHTS
 
                                                                              62
 
                        [ICON]TOUCHSTONE FAMILY OF FUNDS
 
   
 The International Equity Fund -- Class A
    
 
   
<TABLE>
<CAPTION>
                                                                                             FOR THE SIX
                                                                                            MONTHS ENDED
                                                                                            JUNE 30, 1998
               PERIOD ENDED                  12/31/94(A)   12/31/95   12/31/96   12/31/97    (UNAUDITED)
<S>                                          <C>           <C>        <C>        <C>        <C>
 Per Share Operating Performance
- -------------------------------------------
 Net Asset Value, Beginning of Period          $10.00       $ 9.12     $ 9.58     $10.63       $11.41
- -------------------------------------------
 Income From Investment Operations
- -------------------------------------------
 Net Investment Income                             --         0.21       0.05       0.02         0.05
- -------------------------------------------
 Net Gains or Losses on Securities (both
  realized and unrealized)                      (0.88)        0.47       1.06       1.64         2.59
- -------------------------------------------
 Total from Investment Operations               (0.88)        0.68       1.11       1.66         2.64
- -------------------------------------------
 Less Distributions
- -------------------------------------------
 Dividends (from net investment income)            --        (0.22)     (0.06)     (0.02)          --
- -------------------------------------------
 Distributions (from capital gains)                --           --         --      (0.86)          --
- -------------------------------------------
 Total Distributions                               --        (0.22)     (0.06)     (0.88)          --
- -------------------------------------------
 Net Asset Value, End of Period                $ 9.12       $ 9.58     $10.63     $11.41       $14.05
- -------------------------------------------
 Total Return (b)                               (8.80%)       5.29%     11.61%     15.57%       23.14%
- -------------------------------------------
 Ratios/Supplemental Data
- -------------------------------------------
 Net Assets, End of Period                     $2,282       $2,617     $3,449     $4,761       $6,663
- -------------------------------------------
 Ratio of Expenses to Average Net Assets
  (c)                                            1.85%(e)     1.60%      1.60%      1.60%        1.60%(e)
- -------------------------------------------
 Ratio of Net Income to Average Net Assets
  (c)                                           (0.36%)(e)    0.11%      0.42%      0.17%        0.74%(e)
- -------------------------------------------
 Portfolio Turnover Rate                            7%          90%        86%       151%          55%
- -------------------------------------------
</TABLE>
    
 
   
 The Income Opportunity Fund -- Class A
    
 
   
<TABLE>
<CAPTION>
                                                                                             FOR THE SIX
                                                                                            MONTHS ENDED
                                                                                            JUNE 30, 1998
               PERIOD ENDED                  12/31/94(A)   12/31/95   12/31/96   12/31/97    (UNAUDITED)
<S>                                          <C>           <C>        <C>        <C>        <C>
 Per Share Operating Performance
- -------------------------------------------
 Net Asset Value, Beginning of Period          $10.00       $ 9.08     $ 9.83     $10.90       $ 9.89
- -------------------------------------------
 Income From Investment Operations
- -------------------------------------------
 Net Investment Income                           0.22         1.19       1.12       1.24         0.51
- -------------------------------------------
 Net Gains or Losses on Securities (both
  realized and unrealized)                      (0.94)        0.77       1.38      (0.23)       (0.47)
- -------------------------------------------
 Total from Investment Operations               (0.72)        1.96       2.50       1.01         0.04
- -------------------------------------------
 Less Distributions
- -------------------------------------------
 Dividends (from net investment income)         (0.20)       (1.21)     (1.12)     (1.22)       (0.47)
- -------------------------------------------
 Distributions (from capital gains)                --           --      (0.31)     (0.80)          --
- -------------------------------------------
 Total Distributions                            (0.20)       (1.21)     (1.43)     (2.02)       (0.47)
- -------------------------------------------
 Net Asset Value, End of Period                $ 9.08       $ 9.83     $10.90     $ 9.89       $ 9.46
- -------------------------------------------
 Total Return (b)                               (7.20%)      23.19%     26.66%      9.49%        0.33%
- -------------------------------------------
 Ratios/Supplemental Data
- -------------------------------------------
 Net Assets, End of Period (000s)              $  926       $1,369     $4,579     $7,009       $7,475
- -------------------------------------------
 Ratio of Expenses to Average Net Assets
  (c)                                            1.45%(e)     1.20%      1.20%      1.20%        1.20%(e)
- -------------------------------------------
 Ratio of Net Income to Average Net Assets
  (c)                                            8.60%(e)    12.42%     11.29%     11.19%       10.60%(e)
- -------------------------------------------
 Portfolio Turnover Rate                          144%         120%       222%       270%         184%
- -------------------------------------------
</TABLE>
    
<PAGE>   63
 
  FINANCIAL HIGHLIGHTS
 
63
 
                        [ICON]TOUCHSTONE FAMILY OF FUNDS
 
 The Value Plus Fund -- Class A
 
   
<TABLE>
<CAPTION>
                                                               FOR THE PERIOD
                                                                   ENDED
                                                                  JUNE 30,
                                                                  1998(f)
                        PERIOD ENDED                            (UNAUDITED)
<S>                                                            <C>
 Per Share Operating Performance
- ------------------------------------------------------------
 Net Asset Value, Beginning of Period                             $ 10.00
- ------------------------------------------------------------
 Income From Investment Operations
- ------------------------------------------------------------
 Net Investment Income                                                 --
- ------------------------------------------------------------
 Net Gains or Losses on Securities (both realized and
  unrealized)                                                       (0.13)
- ------------------------------------------------------------
 Total from Investment Operations                                   (0.13)
- ------------------------------------------------------------
 Less Distributions
- ------------------------------------------------------------
 Dividends (from net investment income)                                --
- ------------------------------------------------------------
 Distributions (from capital gains)                                    --
- ------------------------------------------------------------
 Total Distributions                                                   --
- ------------------------------------------------------------
 Net Asset Value, End of Period                                   $  9.87
- ------------------------------------------------------------
 Total Return (b)                                                   (1.30)%
- ------------------------------------------------------------
 Ratios/Supplemental Data
- ------------------------------------------------------------
 Net Assets, End of Period                                        $24,932
- ------------------------------------------------------------
 Ratio of Expenses to Average Net Assets (c)                         1.30%(e)
- ------------------------------------------------------------
 Ratio of Net Income to Average Net Assets (c)                       0.48%(e)
- ------------------------------------------------------------
 Portfolio Turnover Rate                                                7%
- ------------------------------------------------------------
</TABLE>
    
 
   
 The Growth & Income Fund -- Class A
    
 
   
<TABLE>
<CAPTION>
                                                                                                 FOR THE SIX
                                                                                                MONTHS ENDED
                                                                                                JUNE 30, 1998
                PERIOD ENDED                  12/31/94(A)   12/31/95(D)   12/31/96   12/31/97    (UNAUDITED)
<S>                                           <C>           <C>           <C>        <C>        <C>
 Per Share Operating Performance
- --------------------------------------------
 Net Asset Value, Beginning of Period           $10.00        $10.02       $13.14     $14.03       $15.06
- --------------------------------------------
 Income From Investment Operations
- --------------------------------------------
 Net Investment Income                            0.86          0.05         0.12       0.09         0.09
- --------------------------------------------
 Net Gains or Losses on Securities (both
  realized and unrealized)                       (0.84)         3.46         2.12       2.78         1.39
- --------------------------------------------
 Total from Investment Operations                 0.02          3.51         2.24       2.87         1.48
- --------------------------------------------
 Less Distributions
- --------------------------------------------
 Dividends (from net investment income)             --         (0.16)       (0.12)     (0.11)       (0.10)
- --------------------------------------------
 Distributions (from capital gains)                 --         (0.23)       (1.23)     (1.73)          --
- --------------------------------------------
 Total Distributions                                --         (0.39)       (1.35)     (1.84)       (0.10)
- --------------------------------------------
 Net Asset Value, End of Period                 $10.02        $13.14       $14.03     $15.06       $16.44
- --------------------------------------------
 Total Return (b)                                 0.20%        35.14%       16.95%     20.70%        9.79%
- --------------------------------------------
 Ratios/Supplemental Data
- --------------------------------------------
 Net Assets, End of Period (000s)               $   20        $1,500       $3,659     $5,980       $15,664
- --------------------------------------------
 Ratio of Expenses to Average Net Assets (c)      1.55%(e)      1.30%        1.30%      1.30%        1.30%(e)
- --------------------------------------------
 Ratio of Net Income to Average Net Assets
  (c)                                             0.56%(e)      0.56%        0.55%      0.67%        1.48%(e)
- --------------------------------------------
 Portfolio Turnover Rate                            10%          102%          92%       170%          31%
- --------------------------------------------
</TABLE>
    
<PAGE>   64
 
  FINANCIAL HIGHLIGHTS
 
                                                                              64
 
                        [ICON]TOUCHSTONE FAMILY OF FUNDS
 
   
 The Balanced Fund -- Class A
    
 
   
<TABLE>
<CAPTION>
                                                                                             FOR THE SIX
                                                                                            MONTHS ENDED
                                                                                            JUNE 30, 1998
               PERIOD ENDED                  12/31/94(A)   12/31/95   12/31/96   12/31/97    (UNAUDITED)
<S>                                          <C>           <C>        <C>        <C>        <C>
 Per Share Operating Performance
- -------------------------------------------
 Net Asset Value, Beginning of Period          $10.00       $ 9.97     $11.34     $12.48       $12.42
- -------------------------------------------
 Income From Investment Operations
- -------------------------------------------
 Net Investment Income                           0.08         0.31       0.30       0.27         0.13
- -------------------------------------------
 Net Gains or Losses on Securities (both
  realized and unrealized)                      (0.05)        1.99       1.59       2.09         0.79
- -------------------------------------------
 Total from Investment Operations                0.03         2.30       1.89       2.36         0.92
- -------------------------------------------
 Less Distributions
- -------------------------------------------
 Dividends (from net investment income)         (0.06)       (0.33)     (0.30)     (0.30)       (0.10)
- -------------------------------------------
 Distributions (from capital gains)                --        (0.60)     (0.45)     (2.12)          --
- -------------------------------------------
 Total Distributions                            (0.06)       (0.93)     (0.75)     (2.42)       (0.10)
- -------------------------------------------
 Net Asset Value, End of Period                $ 9.97       $11.34     $12.48     $12.42       $13.24
- -------------------------------------------
 Total Return (b)                               (0.30%)      23.24%     16.86%     19.25%        7.41%
- -------------------------------------------
 Ratios/Supplemental Data
- -------------------------------------------
 Net Assets, End of Period                     $1,001       $1,502     $2,085     $3,316       $4,452
- -------------------------------------------
 Ratio of Expenses to Average Net Assets
  (c)                                            1.60%(e)     1.35%      1.35%      1.35%        1.35%(e)
- -------------------------------------------
 Ratio of Net Income to Average Net Assets
  (c)                                            2.75%(e)     2.39%      2.19%      2.07%        2.26%(e)
- -------------------------------------------
 Portfolio Turnover Rate                            7%         121%        88%       120%          21%
- -------------------------------------------
</TABLE>
    
<PAGE>   65
 
  FINANCIAL HIGHLIGHTS
 
65
 
                        [ICON]TOUCHSTONE FAMILY OF FUNDS
 
   
 The Bond Fund -- Class A
    
 
   
<TABLE>
<CAPTION>
                                                                                                FOR THE SIX
                                                                                               MONTHS ENDED
                                                                                               JUNE 30, 1998
               PERIOD ENDED                  12/31/94(A)   12/31/95(D)   12/31/96   12/31/97    (UNAUDITED)
<S>                                          <C>           <C>           <C>        <C>        <C>
 Per Share Operating Performance
- -------------------------------------------
 Net Asset Value, Beginning of Period          $10.00        $ 9.88       $10.61     $10.17       $10.22
- -------------------------------------------
 Income From Investment Operations
- -------------------------------------------
 Net Investment Income                           1.15          0.56         0.71       0.61         0.27
- -------------------------------------------
 Net Gains or Losses on Securities (both
  realized and unrealized)                      (1.12)         1.07        (0.43)      0.11         0.16
- -------------------------------------------
 Total from Investment Operations                0.03          1.63         0.28       0.72         0.43
- -------------------------------------------
 Less Distributions
- -------------------------------------------
 Dividends (from net investment income)         (0.15)        (0.86)       (0.70)     (0.66)       (0.24)
- -------------------------------------------
 Distributions (from capital gains)                --         (0.04)       (0.02)     (0.01)          --
- -------------------------------------------
 Total Distributions                            (0.15)        (0.90)       (0.72)     (0.67)       (0.24)
- -------------------------------------------
 Net Asset Value, End of Period                $ 9.88        $10.61       $10.17     $10.22       $10.41
- -------------------------------------------
 Total Return (b)                                0.28%        16.95%        2.85%      7.30%        4.25%
- -------------------------------------------
 Ratios/Supplemental Data
- -------------------------------------------
 Net Assets, End of Period (000s)              $   16        $  523       $  821     $1,685       $4,267
- -------------------------------------------
 Ratio of Expenses to Average Net Assets
  (c)                                            1.15%(e)      0.90%        0.90%      0.90%        0.90%(e)
- -------------------------------------------
 Ratio of Net Income to Average Net Assets
  (c)                                            5.58%(e)      6.21%        6.01%      6.08%        5.82%(e)
- -------------------------------------------
 Portfolio Turnover Rate                           11%           78%          64%        88%          76%
- -------------------------------------------
</TABLE>
    
<PAGE>   66
 
  FINANCIAL HIGHLIGHTS
 
                                                                              66
 
                        [ICON]TOUCHSTONE FAMILY OF FUNDS
 
   
 The Standby Income Fund
    
 
   
<TABLE>
<CAPTION>
                                                                                             FOR THE SIX
                                                                                            MONTHS ENDED
                                                                                            JUNE 30, 1998
               PERIOD ENDED                  12/31/94(a)   12/31/95   12/31/96   12/31/97    (UNAUDITED)
<S>                                          <C>           <C>        <C>        <C>        <C>
 Per Share Operating Performance
- -------------------------------------------
 Net Asset Value, Beginning of Period          $10.00       $10.03     $10.01     $ 9.98       $ 9.57
- -------------------------------------------
 Income From Investment Operations
- -------------------------------------------
 Net Investment Income                           0.11         0.55       0.46       0.51         0.25
- -------------------------------------------
 Net Gains or Losses on Securities (both
  realized and unrealized)                       0.03        (0.02)      0.01      (0.00)        0.01
- -------------------------------------------
 Total from Investment Operations                0.14         0.53       0.47       0.51         0.26
- -------------------------------------------
 Less Distributions
- -------------------------------------------
 Dividends (from net investment income)         (0.11)       (0.55)     (0.50)     (0.52)       (0.26)
- -------------------------------------------
 Net Asset Value, End of Period                $10.03       $10.01     $ 9.98     $ 9.97       $ 9.97
- -------------------------------------------
 Total Return (b)                                1.40%        5.71%      4.80%      5.21%        2.63%
- -------------------------------------------
 Ratios/Supplemental Data
- -------------------------------------------
 Net Assets, End of Period                     $5,048       $5,910     $6,456     $8,603       $11,585
- -------------------------------------------
 Ratio of Expenses to Average Net Assets
  (g)                                            1.00%(e)     0.75%      0.75%      0.75%        0.75%(e)
- -------------------------------------------
 Ratio of Net Income to Average Net Assets       4.54%(e)     5.32%      4.88%      5.14%        5.12%(e)
- -------------------------------------------
 Portfolio Turnover Rate                            0%         142%        20%       285%         583%
- -------------------------------------------
</TABLE>
    
 
<TABLE>
<C>  <S>                                                 <C>
  *  The outstanding shares of each series of Touchstone Series Trust (formerly named Select Advisors
                       Trust A), other than the Standby Income Fund, were redesignated as Class A shares
     effective at the close of business on December 31, 1998.
(a)  The Fund commenced operations on October 3, 1994.
(b)  Total return is calculated without the effects of a sales charge. Total returns would have been
     lower had certain expenses not been reimbursed or waived during the periods shown. Total return
     figures are not annualized.
(c)  Includes the Fund's proportionate share of the corresponding Portfolio's expenses. If the waiver and
     reimbursement had not been in place for the periods listed and after consideration of state expense
     limitations, the ratios of expenses to average net assets would have been higher.
(d)  Per share amounts have been calculated using the average share method.
(e)  Ratios are annualized.
(f)  The Fund commenced operations on May 1, 1998.
(g)  If the waiver and reimbursement had not been in place for the periods listed, the ratios of expenses
     to average net assets would have been higher.
</TABLE>
<PAGE>   67
 
   
                                    [THIS PAGE INTENTIONALLY LEFT BLANK]
 
67
    
 
                        [ICON]TOUCHSTONE FAMILY OF FUNDS
<PAGE>   68
 
  FOR MORE INFORMATION
 
                                                                              68
 
FOR MORE INFORMATION    [ICON]TOUCHSTONE FAMILY OF FUNDS
 
For investors who want more
information about the Funds, the
following documents are available
free upon request:
STATEMENT OF ADDITIONAL INFORMATION
(SAI): The SAI provides more
detailed information about the Funds
and is legally a part of this
prospectus.
 
ANNUAL/SEMI-ANNUAL REPORTS: The
Funds' annual and semi-annual
reports provide additional
information about the Funds'
investments. In each Fund's annual
report, you will find a discussion
of the market conditions and
investment strategies that
significantly affected the Fund's
performance during its last fiscal
year.
You can get free copies of the SAI,
the reports, other information and
answers to your questions about the
Funds by contacting your financial
advisor, or the Funds at:
 
     Touchstone Family of Funds
          311 Pike Street
       Cincinnati, Ohio 45202
       800.669.2796 (Press 3)
   http://www.touchstonefunds.com
 
You can view the Funds' SAI and the
reports at the Public Reference Room
of the Securities and Exchange
Commission.
 
   
For a fee, you can get text-only
copies by writing to the Public
Reference Room of the SEC, 450 Fifth
Street N.W., Washington, D.C.
20549-6009. You can also call
1.800.SEC.0330.
    
 
   
You can also view the SAI and the
reports free from the SEC's Internet
website at http://www.sec.gov.
    
 
Investment Company Act file no.  811-8380
                                                   TOUCHSTONE FAMILY OF FUNDS
                                                     O TOUCHSTONE EMERGING
                                                          GROWTH FUND
                                                   O TOUCHSTONE INTERNATIONAL
                                                          EQUITY FUND
                                                      O TOUCHSTONE INCOME
                                                        OPPORTUNITY FUND
                                                       O TOUCHSTONE VALUE
                                                           PLUS FUND
                                                     O TOUCHSTONE GROWTH &
                                                          INCOME FUND
                                                   O TOUCHSTONE BALANCED FUND
                                                     O TOUCHSTONE BOND FUND
                                                      O TOUCHSTONE STANDBY
                                                          INCOME FUND
                                                      Class A and Class C
                                                     Shares are Offered by
                                                        this Prospectus
<PAGE>   69
                           TOUCHSTONE FAMILY OF FUNDS

   
                                   PROSPECTUS
                                 JANUARY 4, 1999
    




                         TOUCHSTONE EMERGING GROWTH FUND

                      TOUCHSTONE INTERNATIONAL EQUITY FUND

                       TOUCHSTONE INCOME OPPORTUNITY FUND

                           TOUCHSTONE VALUE PLUS FUND

                         TOUCHSTONE GROWTH & INCOME FUND

                            TOUCHSTONE BALANCED FUND

                              TOUCHSTONE BOND FUND

                         TOUCHSTONE STANDBY INCOME FUND




Neither the Securities and Exchange Commission nor any state securities
commission has approved any Fund's shares as an investment or determined whether
this prospectus is accurate or complete. Anyone who tells you otherwise is
committing a crime.
<PAGE>   70
   
                           TOUCHSTONE FAMILY OF FUNDS
    

   
The Touchstone Family of Funds is a group of mutual funds. Each Fund has a
different investment goal and risk level and is a part of the Touchstone Series
Trust (the Trust).
    

                                       2


<PAGE>   71
   
Table of Contents                                      Page
- -----------------                                      ----

Touchstone Emerging Growth Fund

Touchstone International Equity Fund

Touchstone Income Opportunity Fund

Touchstone Value Plus Fund

Touchstone Growth & Income Fund

Touchstone Balance Fund

Touchstone Bond Fund

Touchstone Standby Income Fund

Investment Strategies And Risks

The Funds' Management

Investing With Touchstone

Distributions and Taxes

For More Information
    



                                       3
<PAGE>   72
                         TOUCHSTONE EMERGING GROWTH FUND

THE FUND'S INVESTMENT GOAL

The Emerging Growth Fund seeks to increase the value of Fund shares as a primary
goal and to earn income as a secondary goal.

   
As with any mutual fund, there is no guarantee that the Fund will achieve its 
goal.
    

ITS PRINCIPAL INVESTMENT STRATEGIES

   
The Fund invests primarily (at least 65% of total assets) in the common stocks
of smaller, rapidly growing (emerging growth) companies. In selecting its
investments, the portfolio managers focus on those companies they believe will
grow faster than the U.S. economy in general. They also choose companies they
believe are priced lower in the market than their true value.
    

When the portfolio managers believe the following securities offer a good
potential for capital growth or income, up to 35% of the Fund's assets may be
invested in:

   
         Larger company stocks
         Preferred stocks
         Convertible bonds
         Other debt securities, including:
                  collateralized mortgage obligations (CMOs), stripped U.S. 
                  government securities (Strips) and mortgage-related
                  securities, all of which will be rated investment grade
    

The Fund may also invest in:

         - Securities of foreign companies traded mainly outside the U.S. (up to
         20%) 

         - American Depositary Receipts (ADRs) (up to 20%) 

   
         - Emerging market securities (up to 10%).
    

   
    
                                        4
<PAGE>   73
   
    
THE KEY RISKS

   
The Fund's share price will fluctuate and you could lose money on your
investment in the Fund. The Fund could also return less than other investments:
    

   
- - If the stock market as a whole goes down.
    

   
    
   
- - Because securities of small cap companies may be more thinly traded and may
  have more frequent and larger price changes than securities of larger cap
  companies.

    
   
- - If the market continually values the stocks in the Fund's portfolio lower than
  the portfolio managers believe they should be valued.
    

   
- - If the stocks in the Fund's portfolio are not undervalued as expected.
    

   
- - If the companies in which the Fund invests do not grow as rapidly as expected.
    

   
- - If interest rates go up, causing the value of any debt securities held by the
  Fund to decline.
    

   
- - Because CMOs, Strips and mortgage-related securities may lose more value due
  to changes in interest rates than other debt securities and are subject to
  prepayment.
    

   
- - Because investments in foreign securities may have more frequent and larger
  price changes than U.S. securities and may lose value due to changes in
  currency exchange rates and other factors.
    

   
- - Because emerging market securities involve unique risks, such as exposure to
  economies less diverse and mature than that of the U.S. and economic or
  political changes may cause larger price changes in emerging market 
  securities than other foreign securities.
    

   
An investment in the Fund is not a bank deposit and is not insured or guaranteed
by the FDIC or any other government entity.
    

   
    

   
You can find more information about certain securities in which the Fund may 
invest and a more detailed description of risks under the heading Investment 
Strategies and Risks later in this Prospectus.
    

                                        5
<PAGE>   74
WHO MAY WANT TO INVEST

   
This Fund is most appropriate for you if you are an aggressive investor and are
willing to assume a relatively high amount of risk. You should be comfortable
with extreme levels of volatility, and safety of principal in the short term
should not be a high priority for you. This Fund's approach may be appropriate
for you if you are many years from retirement and are comfortable with wide
market fluctuations.
    


                                        6
<PAGE>   75
   
THE FUND'S PERFORMANCE
    

The bar chart shown below indicates the risks of investing in the Emerging
Growth Fund. It shows changes in the performance of the Fund's Class A shares
from year to year since the Fund started. The chart does not reflect any sales
charges. Sales charges will reduce return.

   
The Fund's past performance does not necessarily indicate how it will perform in
the future.
    

The return for other classes of shares offered by the Fund will differ from the
Class A returns shown in the bar chart, depending on the expenses of that class.

                                  [BAR GRAPH]
                 EMERGING GROWTH FUND -- CLASS A PERFORMANCE(1)

   
<TABLE>
<CAPTION>
                           YEARS        TOTAL RETURN
                           -----        ------------
                          <S>             <C>
                           1995            22.56%
                           1996            10.56%
                           1997            32.20%
</TABLE>
    

   
    

         During the period shown in the Bar Chart, the highest quarterly return
         was 17.69% (for the quarter ended June 30, 1997) and the lowest
         quarterly return was -4.07% (for the quarter ended March 31, 1997).

         (1) The returns shown are for Class A shares. Class A shares are not
         offered in this Prospectus. Class Y shares would have substantially
         similar annual returns because the shares are invested in the same
         portfolio of securities. The annual returns would differ only to the
         extent that the Classes do not have the same expenses.

   
The table below shows how the Fund's average annual returns for the periods
shown compare to those of the Russell 2000 Index and to the Wiesenberger Small
Cap - MF. The Russell 2000 Index is a widely recognized unmanaged index of small
cap stock performance. The Wiesenberger Small Cap - MF is a composite index of
the annual returns of mutual funds that have an investment style similar to that
of the Emerging Growth Fund. The table shows the effect of the Class A sales
charge.
    

For the periods ended December 31, 1997

   
<TABLE>
<CAPTION>
                                        Past 12 Months        Since Fund Started
- --------------------------------------------------------------------------------
<S>                                     <C>                   <C>
Emerging Growth Fund -- Class A*            24.7%                18.5%
- --------------------------------------------------------------------------------
Russell 2000 Index                          22.4%                19.8%
- --------------------------------------------------------------------------------
Wiesenberger Small Cap - MF                 21.6%                22.2%
- --------------------------------------------------------------------------------
</TABLE>
    

   
* The table shows performance for the Fund's Class A shares because the Class Y
  shares have not yet been in existence for a full calendar year.
    

                                        7
<PAGE>   76
THE FUND'S FEES AND EXPENSES

   
This table describes the fees and expenses that you may pay if you buy and hold
shares of the Fund:
    

   
<TABLE>
<CAPTION>
- --------------------------------------------------------------------------------
SHAREHOLDER FEES (FEES PAID DIRECTLY FROM                   Class Y Shares
YOUR INVESTMENT)                                           
- --------------------------------------------------------------------------------
<S>                                                         <C>
Maximum Sales Charge (Load) Imposed on                     
Purchases (as a percentage of offering                           None
price)
- --------------------------------------------------------------------------------
Maximum Deferred Sales Charge (Load) (as a                 
percentage of amount redeemed)                                   None
- --------------------------------------------------------------------------------
                                                           
- --------------------------------------------------------------------------------
ANNUAL FUND OPERATING EXPENSES (EXPENSES                   
THAT ARE DEDUCTED FROM FUND ASSETS)                        
- --------------------------------------------------------------------------------
Management Fees                                                  0.80%
- --------------------------------------------------------------------------------
Distribution (12b-1) Fees                                        None
- --------------------------------------------------------------------------------
Other Expenses                                                   3.15%
- --------------------------------------------------------------------------------
Total Annual Fund Operating Expenses                             3.95%
- --------------------------------------------------------------------------------
Fee Waiver and/or Expense Reimbursement(1)                       2.70%            
- --------------------------------------------------------------------------------
Net Expenses                                                     1.25%
- --------------------------------------------------------------------------------
</TABLE>
    
   
    
   
- ---------------------
(1) Touchstone Advisors has contractually agreed to waive or reimburse certain
    of the Total Annual Fund Operating Expenses of each Class of the Fund (the
    "Sponsor Agreement"). The Sponsor Agreement will remain in place until at
    least December 31, 1999.
    


The following example should help you compare the cost of investing in the
Emerging Growth Fund with the cost of investing in other mutual funds. The
example assumes that you invest $10,000 in the Fund for the time periods
indicated and then sell all of your shares at the end of those periods. The
example also assumes that your investment has a 5% return each year and that the
Fund's operating expenses remain the same. Although your actual costs may be
higher or lower, based on these assumptions your costs would be:

<TABLE>
<CAPTION>
- ----------------------------------------------
                             Class Y Shares
- ----------------------------------------------
<S>                      <C>
1 Year                   $  127
- ----------------------------------------------
3 Years                  $  397
- ----------------------------------------------
5 Years                  $  686
- ----------------------------------------------
10 Years                 $1,511
- ----------------------------------------------
</TABLE>

- - The example for the 3, 5 and 10-year periods is calculated using the Total
  Fund Operating Expenses before the limits agreed to under the Sponsor 
  Agreement for periods after year 1.


                                        8
<PAGE>   77
                      TOUCHSTONE INTERNATIONAL EQUITY FUND

THE FUND'S INVESTMENT GOAL

The International Equity Fund seeks to increase the value of Fund shares over
the long-term.

   
As with any mutual fund, there is no guarantee that the Fund will achieve its
goal.
    

ITS PRINCIPAL INVESTMENT STRATEGIES

   
The Fund invests primarily (at least 80% of total assets) in equity securities
of foreign companies and will invest in at least three countries outside the
United States. A large portion of those non-U.S. equity securities may be issued
by companies active in emerging market countries (up to 40% of total assets).
    

   
    

The Fund may also invest in certain debt securities issued by U.S. and non-U.S.
entities (up to 20%), including non-investment grade debt securities rated as
low as B.

   
The portfolio manager uses a growth oriented style to choose investments for the
Fund. This includes the use of both qualitative and quantitative analysis to
identify markets and companies that offer solid growth prospects at reasonable
prices. The portfolio manager's investment process seeks to add value by making
good regional and country allocations as well as by selecting individual stocks
within a region.
    

   
    

THE KEY RISKS

   
The Fund's share price will fluctuate and you could lose money on your
investment in the Fund. The Fund could also return less than other investments:
    

   
- - If the stock market as a whole goes down.
    

   
- - Because investments in foreign securities may have more frequent and larger
  price changes than U.S. securities and may lose value due to changes in
  currency exchange rates and other factors.
    

   
- - Because emerging market securities involve unique risks, such as exposure to
  economies less diverse and mature than that of the U.S. and economic or
  political changes may cause larger price changes in emerging market securities
  than other foreign securities.
    

   
- - If the stocks in the Fund's portfolio do not grow over the long term as
  expected.
    

   
- - If interest rates go up, causing the value of any debt securities held by the
  Fund to decline.
    

   

- - Because issuers of non-investment grade securities held by the Fund are more
  likely to be unable to make timely payments of interest or principal. 
    

   
An investment in the Fund is not a bank deposit and is not insured or guaranteed
by the FDIC or any other government entity.
    

   
You can find more information about certain securities in which the Fund may 
invest and a more detailed description of risks under the heading Investment 
Strategies and Risks later in this Prospectus.
    

WHO MAY WANT TO INVEST

   
This Fund is most appropriate for you if you are an aggressive investor and are
willing to assume a relatively high amount of risk. You should be comfortable
with extreme levels of volatility, and safety of principal in the short term
should not be a high priority for you. This Fund's approach may be appropriate
for you if you are many years from retirement and are comfortable with wide
market fluctuations.
    


                                       9
<PAGE>   78
   
THE FUND'S PERFORMANCE
    

   
The bar chart shown below indicates the risk of investing in the International
Equity Fund. It shows changes in the performance of the Fund's Class A shares
from year to year since the Fund started. The chart does not reflect any sales
charges. Sales charges will reduce return.
    

   
The Fund's past performance does not necessarily indicate how it will perform 
in the future.
    

   
The return for other classes of shares offered by the Fund will differ from the
Class A returns shown in the bar chart, depending on the expenses of that class.
    

   
              INTERNATIONAL EQUITY FUND -- CLASS A PERFORMANCE(1)
    
   
    

   
<TABLE>
<CAPTION>
                           YEARS          TOTAL RETURN
                           -----          ------------ 
                           <C>              <C>
                            1995              5.29% 
                            1996             11.61% 
                            1997             15.57% 
</TABLE>
    
   
    

   
         During the period shown in the Bar Chart, the highest quarterly return
         was 11.96% (for the quarter ended June 30, 1997) and the lowest
         quarterly return was -3.95% (for the quarter ended March 31, 1995).
    

         (1) The returns shown are for Class A shares. Class A shares are not
         offered in this Prospectus. Class Y shares would have substantially
         similar annual returns because the shares are invested in the same
         portfolio of securities. The annual returns would differ only to the
         extent that the Classes do not have the same expenses.

   
The table below shows how the Fund's average annual returns for the periods
shown compare to those of the MSCI EAFE Index and the Wiesenberger Non-US Equity
- - MF index. The MSCI EAFE Index is a Morgan Stanley index that includes stocks
traded on 16 exchanges in Europe, Australia and the Far East. The Wiesenberger
Non-US Equity - MF is a composite index of the annual returns of mutual funds
that have an investment style similar to that of the International Equity Fund.
The table shows the effect of the Class A sales charge.
    


For the periods ended December 31, 1997

   
<TABLE>
<CAPTION>
- --------------------------------------------------------------------------------
                                          Past 12 Months      Since Fund Started
- --------------------------------------------------------------------------------
<S>                                       <C>                 <C>
International Equity Fund - Class A*           8.9%                    4.9%
- --------------------------------------------------------------------------------
MSCI EAFE Index                                2.1%                    5.8%
- --------------------------------------------------------------------------------
Wiesenberger Non-US Equity - MF               -2.0%                    3.2%
- --------------------------------------------------------------------------------
</TABLE>
    

   
* The table shows performance for the Fund's Class A shares because the Class Y
  shares have not yet been in existence for a full calendar year.
    

                                       10
<PAGE>   79
THE FUND'S FEES AND EXPENSES

   
This table describes the fees and expenses that you may pay if you buy and hold
shares of the Fund:
    

   
<TABLE>
<CAPTION>
- --------------------------------------------------------------------------------
SHAREHOLDER FEES (FEES PAID DIRECTLY FROM YOUR              Class Y Shares
INVESTMENT)                                             
- --------------------------------------------------------------------------------
<S>                                                         <C>
Maximum Sales Charge (Load) Imposed on                  
Purchases (as a percentage of offering price)                    None
- --------------------------------------------------------------------------------
Maximum Deferred Sales Charge (Load) (as a              
percentage of amount redeemed)                                   None
- --------------------------------------------------------------------------------
                                                        
- --------------------------------------------------------------------------------
ANNUAL FUND OPERATING EXPENSES (EXPENSES THAT           
ARE DEDUCTED FROM FUND ASSETS)                          
- --------------------------------------------------------------------------------
Management Fees                                                  0.95%
- --------------------------------------------------------------------------------
Distribution (12b-1) Fees                                        None
- --------------------------------------------------------------------------------
Other Expenses                                                   2.63%
- --------------------------------------------------------------------------------
Total Annual Fund Operating Expenses                             3.58%
- --------------------------------------------------------------------------------
Fee Waiver and/or Expense Reimbursement(1)                       2.23%
- --------------------------------------------------------------------------------
Net Expenses                                                     1.35%
- --------------------------------------------------------------------------------
</TABLE>
    
                                                     
   
    
   
(1) Touchstone Advisors has contractually agreed to waive or reimburse certain
    of the Total Annual Fund Operating Expenses of each Class of the Fund (the
    "Sponsor Agreement"). The Sponsor Agreement will remain in place until at
    least December 31, 1999.
    


The following example should help you compare the cost of investing in the
International Equity Fund with the cost of investing in other mutual funds. The
example assumes that you invest $10,000 in the Fund for the time periods
indicated and then sell all of your shares at the end of those periods. The
example also assumes that your investment has a 5% return each year and that the
Fund's operating expenses remain the same. Although your actual costs may be
higher or lower, based on these assumptions your costs would be:

   
<TABLE>
<CAPTION>
- -------------------------------------------
                        Class Y Shares
- -------------------------------------------
<S>               <C>
1 Year            $  137
- -------------------------------------------
3 Years           $  428
- -------------------------------------------
5 Years           $  739
- -------------------------------------------
10 Years          $1,624
- -------------------------------------------
</TABLE>

- - The example for the 3, 5 and 10-year periods is calculated using the Total 
  Fund Operating Expenses before the limits agreed to under the Sponsor 
  Agreement for periods after year 1.
    


                                       11
<PAGE>   80
                       TOUCHSTONE INCOME OPPORTUNITY FUND

THE FUND'S INVESTMENT GOAL

The Income Opportunity Fund seeks to achieve a high level of current income as
its main goal. The Fund may also seek to increase the value of Fund shares, if
consistent with its main goal.

   
As with any mutual fund, there is no guarantee that the Fund will achieve its 
goal.
    

ITS PRINCIPAL INVESTMENT STRATEGIES

   
The Fund invests primarily in debt securities. These debt securities will
generally be more risky non-investment grade corporate and government securities
(up to 100% of total assets). Non-investment grade debt securities are often
referred to as "junk bonds" and are considered speculative.
    

The Fund's investments may include:

         - Securities of foreign companies (up to 100%), but only up to 30% of
           its assets in securities of foreign companies that are denominated in
           a currency other than the U.S. dollar.

         - Debt securities that are emerging market securities (up to 65%).

   
         - Mortgage-related securities and loans and loan participations.
    

         - Currency futures and option contracts.

   
    
THE KEY RISKS

   
The Fund's share price will fluctuate and you could lose money on your
investment in the Fund. The Fund could also return less than other investments:
    

   
- - If interest rates go up, causing the value of any debt securities held by the
  Fund to decline.
    

   
    
   
- - Because issuers of non-investment grade securities held by the Fund are more
  likely to be unable to make timely payments of interest or principal.
    

   
- - Because investments in foreign securities may have more frequent and larger
  price changes than U.S. securities and may lose value due to changes in
  currency exchange rates and other factors.
    

   
- - Because emerging market securities involve unique risks, such as exposure to
  economies less diverse and mature than that of the U.S. and economic or
  political changes may cause larger price changes in emerging market securities
  than other foreign securities.
    

   
- - Because mortgage-related securities may lose more value due to changes in
  interest rates than other debt securities and are subject to prepayment. 
    

   
- - Because loans and loan participations may be more difficult to sell than other
  investments and are subject to the risk of borrower default.
    

   
- - If the stock market as a whole goes down.
    

   
An investment in the Fund is not a bank deposit and is not insured or 
guaranteed by the FDIC or by any other government entity.
    

   
You can find more information about certain securities in which the Fund may
invest and a more detailed description of risks under the heading Investment
Strategies and Risks later in this Prospectus.
    

WHO MAY WANT TO INVEST

   
This Fund is most appropriate for you if you are an aggressive investor and are
willing to assume a relatively high amount of risk. You should be comfortable
with extreme levels of volatility, and safety of principal in the short term
should not be a high priority for you. This Fund's approach may be appropriate
for you if you are many years from retirement and are comfortable with wide
market fluctuations.
    


                                       12
<PAGE>   81
   
THE FUND'S PERFORMANCE
    

The bar chart shown below indicates the risks of investing in the Income
Opportunity Fund. It shows changes in the performance of the Fund's Class A
shares from year to year since the Fund started. The chart does not reflect any
sales charges. Sales charges will reduce return.

   
The Fund's past performance does not necessarily indicate how it will perform in
the future.
    

The return for other classes of shares offered by the Fund will differ from the
Class A returns shown in the bar chart, depending on the expenses of that class.

                                  [BAR CHART]
               INCOME OPPORTUNITY FUND -- CLASS A PERFORMANCE(1)
   
<TABLE>
<CAPTION>
                           YEARS          TOTAL RETURN
                           -----          ------------
                          <S>               <C>
                           1995              23.19%
                           1996              26.66%
                           1997               9.49%
</TABLE>
    
   
    


   
         During the period shown in the Bar Chart, the highest quarterly return
         was 16.15% (for the quarter ended June 30, 1995) and the lowest
         quarterly return was -5.44% (for the quarter ended March 31, 1995).
    

         (1) The returns shown are for Class A shares. Class A shares are not
         offered in this Prospectus. Class Y shares would have substantially
         similar annual returns because the shares are invested in the same
         portfolio of securities. The annual returns would differ only to the
         extent that the Classes do not have the same expenses.

   
The table below shows how the Fund's average annual returns for the periods
shown compare to those of the Lehman Brothers Corporate Bond Index, the
Wiesenberger Corp - High Yield - MF and the Wiesenberger Global Income - MF. The
Lehman Brothers Corporate Bond Index is based on all publicly issued
intermediate fixed-rate, non-convertible investment grade domestic corporate
debt. The Wiesenberger Corp - High Yield - MF index and the Wiesenberger Global
Income - MF index are composite indexes of the annual returns of mutual funds
that have an investment style similar to the Income Opportunity Fund. The table
shows the effect of the Class A sales charge.
    

For the periods ended December 31, 1997

   
<TABLE>
<CAPTION>
- --------------------------------------------------------------------------------
                                            Past 12 Months    Since Fund Started
- --------------------------------------------------------------------------------
<S>                                         <C>               <C>
Income Opportunity Fund - Class A*                4.3%                13.5%
- --------------------------------------------------------------------------------
Lehman Brothers Corporate Bond Index             10.2%                10.9%
- --------------------------------------------------------------------------------
Wiesenberger Corp - High Yield - MF              12.6%                12.5%
- --------------------------------------------------------------------------------
Wiesenberger Global Income - MF                   3.3%                 8.3%
- --------------------------------------------------------------------------------
</TABLE>
    

   
* The table shows performance for the Fund's Class A shares because the Class Y
  shares have not yet been in existence for a full calendar year.
    



                                       13
<PAGE>   82
THE FUND'S FEES AND EXPENSES

   
These tables describe the fees and expenses that you may pay if you buy and hold
shares of the Fund:
    

   
<TABLE>
<CAPTION>
- --------------------------------------------------------------------------------
SHAREHOLDER FEES (FEES PAID DIRECTLY FROM YOUR INVESTMENT)       Class Y Shares
- --------------------------------------------------------------------------------
<S>                                                              <C>
Maximum Sales Charge (Load) Imposed on Purchases (as a
percentage of offering price)                                         None
- --------------------------------------------------------------------------------
Maximum Deferred Sales Charge (Load) (as a percentage of
amount redeemed)                                                      None
- --------------------------------------------------------------------------------

- --------------------------------------------------------------------------------
ANNUAL FUND OPERATING EXPENSES (EXPENSES THAT ARE DEDUCTED
FROM FUND ASSETS)
- --------------------------------------------------------------------------------
Management Fees                                                       0.65%
- --------------------------------------------------------------------------------
Distribution (12b-1) Fees                                             None
- --------------------------------------------------------------------------------
Other Expenses                                                        2.43%
- --------------------------------------------------------------------------------
Total Annual Fund Operating Expenses                                  3.08%
- --------------------------------------------------------------------------------
Fee Waiver and/or Expense Reimbursement(1)                            2.13%
- --------------------------------------------------------------------------------
Net Expenses                                                          0.95%
- --------------------------------------------------------------------------------
</TABLE>
    
   
    

   
(1) Touchstone Advisors has contractually agreed to waive or reimburse certain
    of the Total Annual Fund Operating Expenses of each Class of the Fund (the
    "Sponsor Agreement"). The Sponsor Agreement will remain in place until at
    least December 31, 1999.
    


The following example should help you compare the cost of investing in the
Income Opportunity Fund with the cost of investing in other mutual funds. The
example assumes that you invest $10,000 in the Fund for the time periods
indicated and then sell all of your shares at the end of those periods. The
example also assumes that your investment has a 5% return each year and that the
Fund's operating expenses remain the same. Although your actual costs may be
higher or lower, based on these assumptions your costs would be:


   
<TABLE>
<CAPTION>
- -----------------------------------
                     Class Y Shares
- -----------------------------------
<S>                  <C>
1 Year               $   97
- -----------------------------------
3 Years              $  303
- -----------------------------------
5 Years              $  525
- -----------------------------------
10 Years             $1,166
- -----------------------------------
</TABLE>
    

   
- - The example for the 3, 5 and 10-year periods is calculated using the Total 
  Fund Operating Expenses before the limits agreed to under the Sponsor 
  Agreement for periods after year 1.
    


                                       14
<PAGE>   83
                           TOUCHSTONE VALUE PLUS FUND

THE FUND'S INVESTMENT GOAL

The Value Plus Fund seeks to increase the value of Fund shares over the
long-term. 

   
As with any mutual fund, there is no guarantee that the Fund will achieve its 
goal.
    

ITS PRINCIPAL INVESTMENT STRATEGIES

   
The Fund invests primarily (at least 65% of total assets) in common stock of
larger companies that the portfolio manager believes are undervalued. In
choosing undervalued stocks, the portfolio manager looks for companies that have
proven management and unique features or advantages but are believed to be
priced lower than their true value. These companies may not pay dividends. The
Fund may also invest in common stocks of rapidly growing companies to enhance
the Fund's return and vary its investments to avoid having too much of the
Fund's assets subject to risks specific to undervalued stocks.
    

Up to 70% of total assets may be invested in large-cap companies and up to 30%
may be invested in mid-cap companies.

The Fund may invest in:

         - Preferred stocks (up to 35%)

         - Investment grade debt securities

         - Convertible securities.

   
In addition, the Fund may invest in:
    

         - Cash equivalent investments (up to 10%)

         - Short-term debt securities.

   
    

                                       15
<PAGE>   84
   
THE KEY RISKS
    

   
The Fund's share price could fluctuate and you could lose money on your 
investment in the Fund. The Fund could also return less than other investments:
    

   
- - If the stock market as a whole goes down.
    

   
- - If the market continually values the stocks in the Fund's portfolio lower than
  the portfolio manager believes they should be valued.
    

   
- - If the stocks in the Fund's portfolio are not undervalued as expected.
    

   
- - If interest rates go up, causing the value of any debt securities held by the
  Fund to decline.
    

   
An investment in the Fund is not a bank deposit and is not insured or guaranteed
by the FDIC or any other government entity.
    

   
You can find more information about certain securities in which the Fund may 
invest and a more detailed description of risks under the heading Investment 
Strategies and Risks later in this Prospectus.
    


WHO MAY WANT TO INVEST
   
This Fund will be most appealing to you if you are a moderate, or risk tolerant
investor. You should be comfortable with a fair degree of volatility. Capital
appreciation may be important to you, but you may not want to take extreme risks
in order to achieve it. This Fund's approach may be most appropriate for you if
you are many years from retirement and are comfortable with a moderate level of
risk.
    


PERFORMANCE NOTE

Performance information is only shown for those Funds which have had a full
calendar year of operations. Since the Value Plus Fund started on May 1, 1998,
there is no performance information included in this Prospectus.



                                       16
<PAGE>   85
THE FUND'S FEES AND EXPENSES

   
These tables describe the fees and expenses that you may pay if you buy and hold
shares of the Fund:
    

   
<TABLE>
<CAPTION>
- --------------------------------------------------------------------------------
SHAREHOLDER FEES (FEES PAID DIRECTLY FROM YOUR                Class Y Shares
INVESTMENT)                                                 
- --------------------------------------------------------------------------------
<S>                                                           <C>
Maximum Sales Charge (Load) Imposed on Purchases (as        
a percentage of offering price)                                    None
- --------------------------------------------------------------------------------
Maximum Deferred Sales Charge (Load) (as a percentage       
of amount redeemed)                                                None
- --------------------------------------------------------------------------------
                                                            
- --------------------------------------------------------------------------------
ANNUAL FUND OPERATING EXPENSES (EXPENSES THAT ARE           
DEDUCTED FROM FUND ASSETS)                                  
- --------------------------------------------------------------------------------
Management Fees                                                   0.75%
- --------------------------------------------------------------------------------
Distribution (12b-1) Fees                                          None
- --------------------------------------------------------------------------------
Other Expenses                                                    1.14%
- --------------------------------------------------------------------------------
Total Annual Fund Operating Expenses                              1.89%
- --------------------------------------------------------------------------------
Fee Waiver and/or Expense Reimbursement(1)                        0.84%
- --------------------------------------------------------------------------------
Net Expenses                                                      1.05%
- --------------------------------------------------------------------------------
</TABLE>
    

   
    
                                                        
   
(1) Touchstone Advisors has contractually agreed to waive or reimburse certain
    of the Total Annual Fund Operating Expenses of each Class of the Fund (the
    "Sponsor Agreement"). The Sponsor Agreement will remain in place until at
    least December 31, 1999.
    


The following examples should help you compare the cost of investing in the
Value Plus Fund with the cost of investing in other mutual funds. The example
assumes that you invest $10,000 in the Fund for the time periods indicated and
then sell all of your shares at the end of those periods. The example also
assumes that your investment has a 5% return each year and that the Fund's
operating expenses remain the same. Although your actual costs may be higher or
lower, based on these assumptions your costs would be:


   
<TABLE>
<CAPTION>
- ---------------------------------
                   Class Y Shares
- ---------------------------------
<S>                <C>
1 Year             $107
- ---------------------------------
3 Years            $334
- ---------------------------------
</TABLE>
    


- - The example for the 3-year period is calculated using the Total Fund Operating
  Expenses before the limits agreed to under the Sponsor Agreement for periods 
  after year 1.


                                       17
<PAGE>   86
                         TOUCHSTONE GROWTH & INCOME FUND

THE FUND'S INVESTMENT GOAL

The Growth & Income Fund seeks to increase the value of Fund shares over the
long-term, while receiving dividend income.

   
As with any mutual fund, there is no guarantee that the Fund will achieve its 
goal.
    

ITS PRINCIPAL INVESTMENT STRATEGIES

   
The Fund invests primarily (at least 65% of total assets) in dividend-paying
common stocks, preferred stocks and convertible securities in a variety of
industries. The portfolio manager may choose to purchase securities which do not
pay dividends (up to 35%) but which are expected to increase in value or produce
high income payments in the future.
    

   
In choosing securities for the Fund, the portfolio manager will follow a value
oriented style, generally buying securities with yields that are at least 20%
higher than the average yield of companies in the S&P 500. The portfolio manager
focuses on investing in companies that have a market capitalization of at least
$1 billion, but may invest in companies of any size.
    

The Fund may also invest up to 20% of its total assets in debt securities - and
within this 20% limitation, the Fund may invest the full 20% in investment grade
debt securities or up to 5% in non-convertible non-investment grade debt
securities.

The Fund may also invest in:

         - Securities of foreign companies including American Depository
           Receipts (ADRs) (up to 20%).

   
         - Real estate investment trusts (REITs) (up to 10%).
    

   
    

THE KEY RISKS

   
The fund's share price will fluctuate and you could lose money on your
investment in the Fund. The Fund could also return less than other investments: 
    

   
- - If the stock market as a whole goes down.
    

   
- - If any of the stocks in the Fund's portfolio do not increase in value as
  expected.
    

   
- - If earnings of companies the Fund invests in are not achieved and income
  available for interest or dividend payments is reduced.
    

   
- - If interest rates go up, causing the value of any debt securities held by the
  Fund to decline.
    

   
- - Because investments in foreign securities may have more frequent and larger
  price changes than U.S. securities and may lose value due to changes in
  currency exchange rates and other factors.
    

   
- - Because investments in REITs are more sensitive to changes in interest rates
  and other factors that affect real estate values.
    

   
An investment in the Fund is not a bank deposit and is not insured or
guaranteed by the FDIC or any other government entity.
    

   
You can find more information about certain securities in which the Fund may 
invest and a more detailed description of risks under the heading Investment 
Strategies and Risks later in this Prospectus.
    


                                       18
<PAGE>   87
WHO MAY WANT TO INVEST
   
This Fund will be most appealing to you if you are a moderate or risk tolerant
investor. You should be comfortable with a fair degree of volatility. Capital
appreciation of your investment capital may be important to you, however, you 
may be uncomfortable taking extreme risk in order to achieve it. This Fund's 
approach may be most appropriate for you if you are many years from retirement
and are comfortable with a moderate level of risk.
    


                                       19
<PAGE>   88
   
THE FUND'S PERFORMANCE
    

The bar chart shown below indicates the risks of investing in the Growth &
Income Fund. It shows changes in the performance of the Fund's Class A shares
from year to year since the Fund started. The chart does not reflect any sales
charges. Sales charges will reduce return.

   
The Fund's past performance does not necessarily indicate how it will perform in
the future.
    

The return for other classes of shares offered by the Fund will differ from the
Class A returns shown in the bar chart, depending on the expenses of that class.

                                  [BAR CHART]
                 GROWTH & INCOME FUND -- CLASS A PERFORMANCE(1)
   
<TABLE>
<CAPTION>
                         YEARS           TOTAL RETURN
                         -----           ------------
                        <S>                <C>
                         1995               35.14%
                         1996               16.95%
                         1997               20.70%
</TABLE>
    

   
    

         During the period shown in the bar chart, the highest quarterly return
         was 11.77% (for the quarter ended June 30, 1997) and the lowest
         quarterly return was -4.35% (for the quarter ended March 31, 1997).

         (1) The returns shown are for Class A shares. Class A shares are not
         offered in this Prospectus. Class Y shares would have substantially
         similar annual returns because the shares are invested in the same
         portfolio of securities. The annual returns would differ only to the
         extent that the Classes do not have the same expenses.

   
The table below shows how the Fund's average annual returns for the periods
shown compare to those of the S&P 500 Index and to the Wiesenberger Growth &
Income - MF Index. The S&P 500 Index is a widely recognized unmanaged index of
stock performance. The Wiesenberger Growth & Income - MF Index is a composite
index of the annual returns of mutual funds that have an investment style
similar to the Growth & Income Fund. The table shows the effect of the Class A
sales charge.
    


For the periods ended December 31, 1997

   
<TABLE>
<CAPTION>
- --------------------------------------------------------------------------------
                                            Past 12 Months    Since Fund Started
- --------------------------------------------------------------------------------
<S>                                         <C>               <C>
Growth & Income Fund -- Class A*                 13.7%                 19.9%
- --------------------------------------------------------------------------------
S&P 500 Index                                    33.4%                 28.4%
- --------------------------------------------------------------------------------
Wiesenberger Growth & Income - MF                26.4%                 22.8%
- --------------------------------------------------------------------------------
</TABLE>
    

   
* The table shows performance for the Fund's Class A shares because the Class Y
  shares have not yet been in existence for a full calendar year.
    


                                       20
<PAGE>   89
THE FUND'S FEES AND EXPENSES

   
These tables describe the fees and expenses that you may pay if you buy and hold
shares of the Fund:
    

   
<TABLE>
<CAPTION>
- --------------------------------------------------------------------------------
SHAREHOLDER FEES (FEES PAID DIRECTLY FROM YOUR               Class Y Shares
INVESTMENT)                                                
- --------------------------------------------------------------------------------
<S>                                                          <C>
Maximum Sales Charge (Load) Imposed on Purchases           
(as a percentage of offering price)                               None
- --------------------------------------------------------------------------------
Maximum Deferred Sales Charge (Load) (as a                 
percentage of amount redeemed)                                    None
- --------------------------------------------------------------------------------
                                                           
- --------------------------------------------------------------------------------
ANNUAL FUND OPERATING EXPENSES (EXPENSES THAT ARE          
DEDUCTED FROM FUND ASSETS)                                 
- --------------------------------------------------------------------------------
Management Fees                                                  0.80%
- --------------------------------------------------------------------------------
Distribution (12b-1) Fees                                         None
- --------------------------------------------------------------------------------
Other Expenses                                                   1.40%
- --------------------------------------------------------------------------------
Total Annual Fund Operating Expenses                             2.20%
- --------------------------------------------------------------------------------
Fee Waiver and/or Expense Reimbursement(1)                       1.15%
- --------------------------------------------------------------------------------
Net Expenses                                                     1.05%
- --------------------------------------------------------------------------------
</TABLE>
    
                                                          
   
    

   
(1) Touchstone Advisors has contractually agreed to waive or reimburse certain
    of the Total Annual Fund Operating Expenses of each Class of the Fund (the
    "Sponsor Agreement"). The Sponsor Agreement will remain in place until at
    least December 31, 1999.
    

The following example should help you compare the cost of investing in the
Growth & Income Fund with the cost of investing in other mutual funds. The
example assumes that you invest $10,000 in the Fund for the time periods
indicated and then sell all of your shares at the end of those periods. The
example also assumes that your investment has a 5% return each year and that the
Fund's operating expenses remain the same. Although your actual costs may be
higher or lower, based on these assumptions your costs would be:


   
<TABLE>
<CAPTION>
- -------------------------------
                 Class Y Shares
- -------------------------------
<S>              <C>
1 Year           $  107
- -------------------------------
3 Years          $  334
- -------------------------------
5 Years          $  579
- -------------------------------
10 Years         $1,283
- -------------------------------
</TABLE>
    

   
The example for the 3, 5 and 10-year periods is calculated using the Total Fund
Operating Expenses before the limits agreed to under the Sponsor Agreement for 
periods after year 1.
    


                                       21
<PAGE>   90
                            TOUCHSTONE BALANCED FUND

THE FUND'S INVESTMENT GOAL

The Balanced Fund seeks to achieve both an increase in the value of Fund shares
and current income.

   
As with any mutual fund, there is no guarantee that the Fund will achieve its 
goal.
    

   
    

ITS PRINCIPAL INVESTMENT STRATEGIES

   
The Fund invests in both equity securities (generally about 60% of total assets)
and debt securities (generally about 40%, but at least 25%). The debt securities
will be rated investment grade or at the highest level of non-investment grade.
    

The Fund may invest in:

         - Warrants

         - Preferred stocks

         - Convertible securities.

   
The Fund may also invest up to one-third of its assets in securities of foreign
companies, and up to 15% in emerging market securities.
    

   
In choosing equity securities for the Fund, the portfolio manager will seek out
companies that are in a strong position within their industry, are owned in part
by management and are selling at a price lower than the company's intrinsic
value. Debt securities are also chosen using a value style. The portfolio
manager will focus on higher yielding securities, but will also consider
expected movements in interest rates and industry position.
    

THE KEY RISKS

   
The Fund's share price will fluctuate and you could lose money on your
investment in the Fund. The Fund could also return less than other investments:
    

   
- - If the stock market as a whole goes down.
    

   
    

   
- - If the stocks in the Fund's portfolio do not increase in value as expected.
    

   
- - If earnings of companies the Fund invests in are not achieved and income
  available for interest or dividend payments is reduced.
    

   
    

   
- - If interest rates go up, causing the value of any debt securities held by the
  Fund to decline.
    

   
- - Because investments in foreign securities may have more frequent and larger
  price changes than U.S. securities and may lose value due to changes in
  currency exchange rates and other factors.
    

   
- - Because emerging market securities involve unique risks, such as exposure to
  economies less diverse and mature than that of the U.S. and economic or
  political changes may cause larger price changes in emerging market securities
  than other foreign securities.
    

   
An investment in the Fund is not a bank deposit and is not insured or guaranteed
by the FDIC or any other government entity.
    

   
You can find more information about certain securities in which the Fund may
invest and a more detailed description of risks under the heading Investment
Strategies and Risks later in this Prospectus.
    

WHO MAY WANT TO INVEST

   
This Fund is most appropriate for you if you are a risk neutral or moderately
conservative investor. You may typically take a relatively low risk approach to
investing and may be comfortable with a low level of volatility in your
investments. While safety may be important to you, you may also value
appreciation of your investments. If you invest in this Fund, you should be
willing to accept some risk. This Fund's approach may be appropriate for you if
you are several years from retirement.
    


                                       22
<PAGE>   91
   
THE FUND'S PERFORMANCE
    

The bar chart shown below indicates the risks of investing in the Balanced Fund.
It shows changes in the performance of the Fund's Class A shares from year to
year since the Fund started. The chart does not reflect any sales charges. Sales
charges will reduce return.

   
The Fund's past performance does not necessarily indicate how it will perform in
the future.
    

The return for other classes of shares offered by the Fund will differ from the
Class A returns shown in the bar chart, depending on the expenses of that class.

                                  [BAR CHART]
                    BALANCED FUND -- CLASS A PERFORMANCE(1)
   
<TABLE>
<CAPTION>
                         YEARS          TOTAL RETURN
                         -----          ------------
                        <S>                <C>
                         1995               23.24%
                         1996               16.88%
                         1997               19.25%
</TABLE>
    
   
    


         During the period shown in the bar chart, the highest quarterly return
         was 10.71% (for the quarter ended June 30, 1997) and the lowest
         quarterly return was -0.32% (for the quarter ended March 31, 1997).

         (1) The returns shown are for Class A shares. Class A shares are not
         offered in this Prospectus. Class Y shares would have substantially
         similar annual returns because the shares are invested in the same
         portfolio of securities. The annual returns would differ only to the
         extent that the Classes do not have the same expenses.

   
The table below shows how the Fund's average annual returns for the periods
shown compare to those of the Standard & Poor's Composite Index of 500 Stocks,
the Lehman Brothers Government/Corporate Index and to the Wiesenberger Balanced
Domestic - MF index. The Lehman Brothers Government/Corporate Index is composed
of 5,400 publicly issued corporate and U.S. government debt rated Baa or better
with at least one year to maturity and at least $25 million par outstanding. The
Wiesenberger Balanced Domestic - MF index is a composite index of the annual
returns of mutual funds that have an investment style similar to the Balanced
Fund. The table shows the effect of the Class A sales charge.
    


For the periods ended December 31, 1997

   
<TABLE>
<CAPTION>
- --------------------------------------------------------------------------------
                                             Past 12 Months   Since Fund Started
- --------------------------------------------------------------------------------
<S>                                          <C>              <C>
Balanced Fund - Class A*                          12.4%               16.1%
- --------------------------------------------------------------------------------
S&P 500 Index                                     33.4%               28.4%
- --------------------------------------------------------------------------------
Lehman Brothers Government/Corporate Index         9.8%                9.7%
- --------------------------------------------------------------------------------
Wiesenberger Balanced Domestic - MF               18.6%               16.8%
- --------------------------------------------------------------------------------
</TABLE>
    
                                                            
   
* The table shows performance for the Fund's Class A shares because the Class Y
  shares have not yet been in existence for a full calendar year.
    


                                       23
<PAGE>   92
THE FUND'S FEES AND EXPENSES

   
These tables describe the fees and expenses that you may pay if you buy and hold
shares of a Fund:
    

   
<TABLE>
<CAPTION>
- --------------------------------------------------------------------------------
<S>                                                       <C>
SHAREHOLDER FEES (FEES PAID DIRECTLY FROM YOUR            Class Y Shares
INVESTMENT)
- --------------------------------------------------------------------------------
Maximum Sales Charge (Load) Imposed on Purchases (as a
percentage of offering price)                                      None
- --------------------------------------------------------------------------------
Maximum Deferred Sales Charge (Load) (as a percentage
of amount redeemed)                                                None
- --------------------------------------------------------------------------------
ANNUAL FUND OPERATING EXPENSES (EXPENSES THAT ARE
DEDUCTED FROM FUND ASSETS)
- --------------------------------------------------------------------------------
Management Fees                                                   0.80%
- --------------------------------------------------------------------------------
Distribution (12b-1) Fees                                          None
- --------------------------------------------------------------------------------
Other Expenses                                                    3.62%
- --------------------------------------------------------------------------------
Total Annual Fund Operating Expenses                              4.42%
- --------------------------------------------------------------------------------
Fee Waiver and/or Expense Reimbursement(1)                        3.32%
- --------------------------------------------------------------------------------
Net Expenses                                                      1.10%
- --------------------------------------------------------------------------------
</TABLE>
    
   
    

   
(1) Touchstone Advisors has contractually agreed to waive or reimburse certain
    of the Total Annual Fund Operating Expenses of each Class of the Fund (the
    "Sponsor Agreement"). The Sponsor Agreement will remain in place until at
    least December 31, 1999.
    


The following example should help you compare the cost of investing in the
Balanced Fund with the cost of investing in other mutual funds. The example
assumes that you invest $10,000 in the Fund for the time periods indicated and
then sell all of your shares at the end of those periods. The example also
assumes that your investment has a 5% return each year and that the Fund's
operating expenses remain the same. Although your actual costs may be higher or
lower, based on these assumptions your costs would be:


   
<TABLE>
<CAPTION>
- ------------------------------
                Class Y Shares
- ------------------------------
<S>             <C>
1 Year          $  112
- ------------------------------
3 Years         $  350
- ------------------------------
5 Years         $  606
- ------------------------------
10 Years        $1,340
- ------------------------------
</TABLE>
    

   
- - The example for the 3, 5 and 10-year periods is calculated using the Total 
  Fund Operating Expenses before the limits agreed to under the Sponsor 
  Agreement for periods after year 1.
    


                                       24
<PAGE>   93
                              TOUCHSTONE BOND FUND

THE FUND'S INVESTMENT GOAL

The Bond Fund seeks to provide a high level of current income.

   
As with any mutual fund, there is no guarantee that the Fund will achieve its 
goal.
    

   
    

ITS PRINCIPAL INVESTMENT STRATEGIES

   
The Fund invests primarily in higher quality investment grade debt securities
(at least 65% of total assets). The Fund's investment in debt securities may be
determined by the direction in which interest rates are expected to move because
the value of these securities generally moves in the opposite direction from
interest rates. The Fund expects to have an average maturity between five and
fifteen years.
    

The Fund invests in:

         - Mortgage-related securities

         - Asset-backed securities

         - Preferred stocks.

The Fund also invests in U.S. or foreign debt securities which are rated
non-investment grade (up to 35%).

In addition, the Fund may invest in :

         - Debt securities denominated in foreign currencies (20% or less)

   
    
THE KEY RISKS

   
The Fund's share price will fluctuate and you could lose money on your
investment in the Fund. The Fund could also return less than other investments:
    

   
- - If interest rates go up, causing the value of any debt securities held by the
  Fund to decline.
    

   
- - Because investments in foreign securities may have more frequent and larger
  price changes than U.S. securities and may lose value due to changes in
  currency exchange rates and other factors.
    

   
- - Because issuers of non-investment grade securities held by the Fund are more
  likely to be unable to make timely payments of interest or principal.
    

   
- - Because mortgage-related securities and asset-backed securities may lose more
  value due to changes in interest rates than other debt securities and are
  subject to prepayment.
    

   
An investment in the Fund is not a bank deposit and is not insured or guaranteed
by the FDIC or any other government entity.
    

   
You can find more information about certain securities in which the Fund may 
invest and a more detailed description of risks under the heading Investment 
Strategies and Risks later in this Prospectus.
    

WHO MAY WANT TO INVEST

This Fund is most appropriate for you if you prefer to take a relatively low
risk approach to investing. Safety of your investment may be the most important
factor to you. You may be willing to accept potentially lower returns in order
to maintain a lower, more tolerable level of risk. This Fund's approach may be
most appropriate for you if you are nearing retirement.


                                       25
<PAGE>   94
   
THE FUND'S PERFORMANCE
    

The bar chart shown below indicates the risks of investing in the Bond Fund. It
shows changes in the performance of the Fund's Class A shares from year to year
since the Fund's inception. The chart does not reflect any sales charges. Sales
charges will reduce return.

   
The Fund's past performance does not necessarily indicate how it will perform in
the future.
    

The return for other classes of shares offered by the Fund will differ from the
Class A returns shown in the bar chart, depending on the expenses of that class.

                                  [BAR GRAPH]
                      BOND FUND -- CLASS A PERFORMANCE(1)
   
<TABLE>
<CAPTION>
                              YEARS          TOTAL RETURN
                              -----          ------------
                             <S>                <C> 
                              1995               16.95%
                              1996                2.85%
                              1997                7.30%
</TABLE>
    

   
    

         During the period shown in the bar chart, the highest quarterly return
         was 5.21% (for the quarter ended December 31, 1997) and the lowest
         quarterly return was -2.10% (for the quarter ended March 31, 1997).

         (1) The returns shown are for Class A shares. Class A shares are not
         offered in this Prospectus. Class Y shares would have substantially
         similar annual returns because the shares are invested in the same
         portfolio of securities. The annual returns would differ only to the
         extent that the Classes do not have the same expenses.


   
The table below shows how the Fund's average annual returns for the periods
shown compare to those of the Lehman Brothers Aggregate Index and to the
Wiesenberger Corp - Investment Grade - MF index. The Lehman Brothers Aggregate
Index is comprised of approximately 6000 publicly traded bonds with an average
maturity of about 10 years. The Wiesenberger Corp - Investment Grade - MF index
is a composite index of the annual returns of mutual funds that have an
investment style similar to the Bond Fund. The table shows the effect of the
Class A sales charge.
    


For the periods ended December 31, 1997

   
<TABLE>
<CAPTION>
- --------------------------------------------------------------------------------
                                             Past 12 Months   Since Fund Started
- --------------------------------------------------------------------------------
<S>                                          <C>              <C>
Bond Fund - Class A*                              2.2%                6.7%
- --------------------------------------------------------------------------------
Lehman Brothers Aggregate Index                   9.7%                9.7%
- --------------------------------------------------------------------------------
Wiesenberger Corp - Investment Grade -            8.9%                9.2%
MF
- --------------------------------------------------------------------------------
</TABLE>
    

   
* The table shows performance for the Fund's Class A shares because the Class Y
  shares have not yet been in existence for a full calendar year.
    


                                       26
<PAGE>   95
THE FUND'S FEES AND EXPENSES

   
These tables describe the fees and expenses that you may pay if you buy and hold
shares of the Fund:
    

   
<TABLE>
<CAPTION>
- --------------------------------------------------------------------------------
SHAREHOLDER FEES (FEES PAID DIRECTLY FROM YOUR                  CLASS Y SHARES
INVESTMENT)                                                  
- --------------------------------------------------------------------------------
<S>                                                             <C>
Maximum Sales Charge (Load) Imposed on Purchases (as         
a percentage of offering price)                                     None
- --------------------------------------------------------------------------------
Maximum Deferred Sales Charge (Load) (as a                   
percentage of amount redeemed)                                      None
- --------------------------------------------------------------------------------
                                                             
- --------------------------------------------------------------------------------
ANNUAL FUND OPERATING EXPENSES (EXPENSES THAT ARE            
DEDUCTED FROM FUND ASSETS)                                   
- --------------------------------------------------------------------------------
Management Fees                                                    0.55%
- --------------------------------------------------------------------------------
Distribution (12b-1) Fees                                           None
- --------------------------------------------------------------------------------
Other Expenses                                                     1.49%
- --------------------------------------------------------------------------------
Total Annual Fund Operating Expenses                               2.04%
- --------------------------------------------------------------------------------
Fee Waiver and/or Expense Reimbursement(1)                         1.39% 
- --------------------------------------------------------------------------------
Net Expenses                                                       0.65%
- --------------------------------------------------------------------------------
</TABLE>
    

   
    
   
(1) Touchstone Advisors has contractually agreed to waive or reimburse certain
    of the Total Annual Fund Operating Expenses of each Class of the Fund (the
    "Sponsor Agreement"). The Sponsor Agreement will remain in place until at
    least December 31, 1999.
    


The following example should help you compare the cost of investing in the Bond
Fund with the cost of investing in other mutual funds. The example assumes that
you invest $10,000 in the Fund for the time periods indicated and then sell all
of your shares at the end of those periods. The example also assumes that your
investment has a 5% return each year and that the Fund's operating expenses
remain the same. Although your actual costs may be higher or lower, based on
these assumptions your costs would be:

   
<TABLE>
<CAPTION>
- ----------------------------------
                    Class Y Shares
- ----------------------------------
<S>                 <C>
1 Year              $ 66
- ----------------------------------
3 Years             $208
- ----------------------------------
5 Years             $362
- ----------------------------------
10 Years            $810
- ----------------------------------
</TABLE>
    

   
- - The example for the 3, 5 and 10-year periods is calculated using the Total 
  Fund Operating Expenses before the limits agreed to under the Sponsor 
  Agreement for periods after year 1.
    


                                       27
<PAGE>   96

                         TOUCHSTONE STANDBY INCOME FUND

THE FUND'S INVESTMENT GOAL

   
The Standby Income Fund seeks to provide a higher level of current income than a
money market fund, while also seeking to prevent large fluctuations in the value
of your initial investment. The Fund does not try to keep a constant $1.00 per
share net asset value.
    

   
As with any mutual fund, there is no guarantee that the Fund will achieve its
goal.
    


ITS PRINCIPAL INVESTMENT STRATEGIES

The Fund invests mostly in various types of money market instruments. All
investments will be rated at least investment grade. On average, the securities
held by the Fund will mature in less than one year.

   
The Fund's investments may include:
    

          - Short-term government securities

          - Mortgage-related securities

          - Asset-backed securities

          - Repurchase agreements.

   
The Fund may invest up to 50% of total assets in:
    

          - Securities denominated in U.S. dollars and issued in the U.S. by
            foreign issuers (known as Yankee bonds),

          - Eurodollar Certificates of Deposit.

   
In addition, the Fund may invest in:
    

          - Debt securities denominated in foreign currencies (up to 20%).

          - Corporate bonds, commercial paper, certificates of deposit, and
            bankers' acceptances.

   
    

THE KEY RISKS

   
The Fund's share price will fluctuate and you could lose money on your
investment in the Fund. The Fund could also return less than other investments:
    

   
- - If interest rates go up, causing the value of any debt securities to decline.
    


   
- - Because mortgage-related securities and asset-backed securities may lose more
  value due to changes in interest rates than other debt securities and are
  subject to prepayment.
    

   
- - Because investments in foreign securities may have more frequent and larger
  price changes than U.S. securities and may lose value due to changes in
  currency exchange rates and other factors.
    

   
An investment in the Fund is not a bank deposit and is not insured or
guaranteed by the FDIC or any other government entity.
    

   
You can find more information about certain securities in which the Fund may 
invest and a more detailed description of risks under the heading Investment 
Strategies and Risks later in this Prospectus.
    

WHO MAY WANT TO INVEST

This Fund is most appropriate for you if you take a relatively low risk approach
to investing. Safety of your investment is of key importance to you.
Additionally, you are willing to accept potentially lower returns in order to
maintain a lower, more tolerable level of risk. This Fund's approach may be most
appropriate for you if you are nearing retirement, or if you have a longer time
horizon, but nevertheless, have a lower risk tolerance. This Fund is also
appropriate for you if you want the added convenience of writing checks directly
from your account.



                                       28
<PAGE>   97
   
THE FUND'S PERFORMANCE
    

The bar chart shown below indicates the risks of investing in the Standby Income
Fund. It shows changes in the performance of the Fund's shares from year to year
since the Fund's inception.

   
The Fund's past performance does not necessarily indicate how it will perform in
the future.
    

                                  [BAR GRAPH]
   
                       STANDBY INCOME FUND PERFORMANCE
    
   
<TABLE>
<CAPTION>
                          YEARS          TOTAL RETURN
                          -----          ------------
                          <S>               <C>
                           1995              5.71%
                           1996              4.83%
                           1997              5.21%
</TABLE>
    

   
    

         During the period shown in the bar chart, the highest quarterly return
         was 1.57% (for the quarter ended December 31, 1995) and the lowest
         quarterly return was 1.07% (for the quarter ended March 31, 1996).

   
    

The table below shows how the Fund's average annual returns for the periods
shown compare to those of the Merrill Lynch 91-Day Treasury Index and to the
30-Day Money Market Yield Index. The Merrill Lynch 91-Day Treasury Index
consists of short-term U.S. Treasury securities, maturing in 91 days. The 30-Day
Money Market Yield Index is an index of money market funds based on 30-day
yields.

For the periods ended December 31, 1997

   
<TABLE>
<CAPTION>
- -------------------------------------------------- --------------------------- ----------------------------
                                                        Past 12 Months             Since Fund Started
- -------------------------------------------------- --------------------------- ----------------------------
<S>                                                <C>                         <C>  
Standby Income Fund                                           5.2%                        5.2%
- -------------------------------------------------- --------------------------- ----------------------------
Merrill Lynch 91-Day Treasury Index                           5.3%                        5.5%
- -------------------------------------------------- --------------------------- ----------------------------
30-Day Money Market Yield Index                               5.1%                        5.1%
- -------------------------------------------------- --------------------------- ----------------------------
</TABLE>
    



                                       29
<PAGE>   98
   
THE FUND'S FEES AND EXPENSES
    

   
These tables describe the fees and expenses that you may pay if you buy and hold
shares of the Fund:
    

- ------------------------------------------------------------ -------------------
SHAREHOLDER FEES (FEES PAID DIRECTLY FROM YOUR INVESTMENT)
- ------------------------------------------------------------ -------------------
Maximum Sales Charge (Load) Imposed on Purchases (as a
percentage of offering price)                                          None
- ------------------------------------------------------------ -------------------
Maximum Deferred Sales Charge (Load) (as a percentage of
amount redeemed)                                                       None
- ------------------------------------------------------------ -------------------

- ------------------------------------------------------------ -------------------
ANNUAL FUND OPERATING EXPENSES (EXPENSES THAT ARE DEDUCTED
FROM FUND ASSETS)
- ------------------------------------------------------------ -------------------
Management Fees                                                       0.25%
- ------------------------------------------------------------ -------------------
Distribution (12b-1) Fees                                              None
- ------------------------------------------------------------ -------------------
Other Expenses                                                        3.26%
- ------------------------------------------------------------ -------------------
Total Annual Fund Operating Expenses                                  3.51%
- ------------------------------------------------------------ -------------------
Fee Waiver and/or Expense Reimbursement(1)                            2.76%
- ------------------------------------------------------------ -------------------
Net Expenses                                                          0.75%
- ------------------------------------------------------------ -------------------
   
(1) Touchstone Advisors has contractually agreed to waive or reimburse certain
    of the Total Annual Fund Operating Expenses of the Fund (the "Sponsor
    Agreement"). The Sponsor Agreement will remain in place until at least
    December 31, 1999.
    



The following example should help you compare the cost of investing in the
Standby Income Fund with the cost of investing in other mutual funds. The
example assumes that you invest $10,000 in the Fund for the time periods
indicated and then sell all of your shares at the end of those periods. The
example also assumes that your investment has a 5% return each year and that the
Fund's operating expenses remain the same. Although your actual costs may be
higher or lower, based on these assumptions your costs would be:

   
<TABLE>
             ---------------------------------------- ----------------------
<S>                                                   <C>
             1 Year                                   $   77
             ---------------------------------------- ----------------------
             3 Years                                  $  819
             ---------------------------------------- ----------------------
             5 Years                                  $1,584
             ---------------------------------------- ----------------------
             10 Years                                 $3,599
             ---------------------------------------- ----------------------
</TABLE>
    

   
   The example for the 3, 5 and 10-year periods is calculated using the Total
   Fund Operating Expenses before the limits agreed to under the Sponsor
   Agreement for periods after year 1.
    



                                       30
<PAGE>   99
                         INVESTMENT STRATEGIES AND RISKS

CAN A FUND DEPART FROM ITS NORMAL STRATEGIES?

   
Each Fund may depart from its investment strategies by taking temporary
defensive positions in response to adverse market, economic or political
conditions. During these times, a Fund may not achieve its investment goals.
    

DO THE FUNDS ENGAGE IN ACTIVE TRADING OF SECURITIES?

   
The International Equity Fund, Income Opportunity Fund and Bond Fund may engage
in active trading to achieve their investment goals. This may cause the Fund to
realize higher capital gains which would be passed on to you. Higher capital
gains could increase your tax liability. Frequent trading also increases
transactions costs, which would lower the Fund's performance.
    

   
CAN A FUND CHANGE ITS INVESTMENT GOAL?
    

   
A Fund's investment goal(s) may be changed by a vote of the Board of Trustees
without shareholder approval. You would be notified at least 30 days before any
such change took effect.
    

YEAR 2000 RISK.

Touchstone has implemented steps intended to assure that its major computer
systems and processes are capable of Year 2000 processing. We are also examining
the third parties with whom we work to assess their readiness and are developing
contingency plans to assure that any problems in their systems will not
materially affect Touchstone's operations.

Companies or governmental entities in which Touchstone Funds invest could also
be affected by the Year 2000 issue, but at this time the Funds cannot predict
the degree of impact.

Computer systems failure of Touchstone, a Fund Sub-Advisor or that of any Fund
service provider could impair Fund services and have a negative impact on a
Fund's operations and returns.

THE FUNDS AT A GLANCE.

The following two tables can give you a quick basic understanding of the types
of securities a Fund tends to invest in and some of the risks associated with a
Fund's investments. You should read all of the information about a Fund and its
risks before deciding to invest.


                                       31
<PAGE>   100
HOW CAN I TELL, AT A GLANCE, WHICH TYPES OF SECURITIES A FUND MIGHT INVEST IN?

   
         The following table show the main types of securities in which each
Fund generally will invest. Some of the Funds' investments are described in 
detail below.
    

<TABLE>
<CAPTION>
- ----------------------------------------- -------- ------------- ----------- ---------- ----------- ------------- --------- --------
                                          EMERGING INTERNATIONAL INCOME      VALUE PLUS GROWTH &    BALANCED FUND BOND FUND STANDBY
                                          GROWTH   EQUITY FUND   OPPORTUNITY FUND       INCOME FUND                         INCOME 
                                          FUND                   FUND                                                       FUND
- ----------------------------------------- -------- ------------- ----------- ---------- ----------- ------------- --------- --------
<S>                                       <C>      <C>           <C>         <C>        <C>         <C>           <C>       <C> 
FINANCIAL INSTRUMENTS
- ----------------------------------------- -------- ------------- ----------- ---------- ----------- ------------- --------- --------
   INVESTS IN U.S. STOCKS                     o         o                         o          o             o
- ----------------------------------------- -------- ------------- ----------- ---------- ----------- ------------- --------- --------
   INVESTS IN FOREIGN STOCKS                  o         o                                    o             o
- ----------------------------------------- -------- ------------- ----------- ---------- ----------- ------------- --------- --------
   INVESTS IN INVESTMENT GRADE DEBT           o         o             o           o          o             o          o           o
   SECURITIES
- ----------------------------------------- -------- ------------- ----------- ---------- ----------- ------------- --------- --------
   INVESTS IN NON-INVESTMENT GRADE DEBT                 o             o                      o             o          o
   SECURITIES
- ----------------------------------------- -------- ------------- ----------- ---------- ----------- ------------- --------- --------
   INVESTS IN FOREIGN DEBT SECURITIES                   o             o                      o             o          o           o
- ----------------------------------------- -------- ------------- ----------- ---------- ----------- ------------- --------- --------
   INVESTS IN FUTURES CONTRACTS
- ----------------------------------------- -------- ------------- ----------- ---------- ----------- ------------- --------- --------
   INVESTS IN FORWARD CURRENCY CONTRACTS                              o
- ----------------------------------------- -------- ------------- ----------- ---------- ----------- ------------- --------- --------
   INVESTS IN ASSET-BACKED SECURITIES                                                                                 o           o
- ----------------------------------------- -------- ------------- ----------- ---------- ----------- ------------- --------- --------
   INVESTS IN MORTGAGE-RELATED SECURITIES     o                       o                                               o           o
- ----------------------------------------- -------- ------------- ----------- ---------- ----------- ------------- --------- --------
   INVESTS IN REAL ESTATE INVESTMENT                                                         o
   TRUSTS (REITS)
- ----------------------------------------- -------- ------------- ----------- ---------- ----------- ------------- --------- --------
INVESTMENT TECHNIQUES
- ----------------------------------------- -------- ------------- ----------- ---------- ----------- ------------- --------- --------
   EMPHASIZES SECURITIES OF SMALL CAP         o
   COMPANIES
- ----------------------------------------- -------- ------------- ----------- ---------- ----------- ------------- --------- --------
   EMPHASIZES SECURITIES OF MID CAP                                               o
   COMPANIES
- ----------------------------------------- -------- ------------- ----------- ---------- ----------- ------------- --------- --------
   EMPHASIZES SECURITIES OF LARGE CAP                                             o          o             o
   COMPANIES
- ----------------------------------------- -------- ------------- ----------- ---------- ----------- ------------- --------- --------
   EMPHASIZES UNDERVALUED STOCKS              o                                   o          o
- ----------------------------------------- -------- ------------- ----------- ---------- ----------- ------------- --------- --------
   INVESTS IN SECURITIES OF EMERGING          o         o             o                      o             o
   MARKETS COUNTRIES
- ----------------------------------------- -------- ------------- ----------- ---------- ----------- ------------- --------- --------
   EMPHASIZES DIVIDEND-PAYING COMMON                                                         o
  STOCKS
- ----------------------------------------- -------- ------------- ----------- ---------- ----------- ------------- --------- --------
   INVESTS IN SHORT-TERM DEBT SECURITIES                                          o                                               o
- ----------------------------------------- -------- ------------- ----------- ---------- ----------- ------------- --------- --------
</TABLE>

   
ADDITIONAL INFORMATION ABOUT FUND INVESTMENTS
    

   
FOREIGN COMPANIES
    

   
A foreign company is organized under the laws of a foreign country and: 
    

   
- - Has the principal trading market for its stock in a foreign country 
    

   
- - Derives at least 50% of its revenues or profits from operations in foreign
  countries or has at least 50% of its assets located in foreign countries
    

   
ADRs
    

   
ADRs are securities that represent an ownership interest in a foreign security.
They are generally issued by a U.S. bank to U.S. buyers as a substitute for
direct ownership and are traded on U.S. exchanges
    

   
INVESTMENT GRADE SECURITIES
    

   
Investment grade securities are generally rated BBB or better by Standard &
Poor's Rating Service (S&P) or Baa or better by Moody's Investor Service, Inc.
(Moody's).
    

   
NON-INVESTMENT GRADE SECURITIES
    

   
Non-investment grade securities are higher risk, lower quality securities, often
referred to as "junk bonds" and are considered speculative. They are rated by
S&P as less than BBB or by Moody's as less than Baa.
    

   
ASSET-BACKED SECURITIES.
    

   
Asset-backed securities represent groups of other assets, for example credit 
card receivables, that are combined or pooled for sale to investors.
    

   
MORTGAGE-RELATED SECURITIES
    

   
Mortgage-related securities represent groups of mortgage loans that are combined
for sale to investors. The loans may be grouped together by:
    

   
- - the Government National Mortgage Association (GNMA)
    

   
- - the Federal National Mortgage Association (FNMA)
    

   
- - the Federal Home Loan Mortgage Corporation (FHLMC) 
    

   
- - commercial banks
    

   
- - savings and loan institutions
    

   
- - mortgage bankers
    

   
- - private mortgage insurance companies
    

 

   
REAL ESTATE INVESTMENT TRUSTS
    

   
Real estate investment trusts (REITs) pool investors' money to invest primarily
in income-producing real estate or real estate-related loans or interests.
    

   
"LARGE-CAP" AND "MID-CAP" COMPANIES
    

   
A large-cap company has a market capitalization of more than $5 billion. A
mid-cap company has a market capitalization of between $1 billion and $5
billion.
    

   
EMERGING GROWTH COMPANIES
    

   
Emerging Growth Companies are companies that have:
    

   
- - a total market capitalization less than that of the average of the companies 
in the Standard & Poor's 500 Composite Stock Price Index (S&P 500)
    

   
- - earnings that the portfolio managers believe may grow faster than the
U.S. economy in general due to new products, management changes at the company
or economic shocks such as high inflation or sudden increases or decreases in
interest rates.
    
 
   
EMERGING MARKET SECURITIES 
    

   
Emerging Market Securities are issued by a company that:
    

   
- - Is organized under the laws of an emerging market country (any country other
than Australia, Austria, Belgium, Canada, Denmark, Finland, France, Germany,
Holland, Italy, Japan, Luxembourg, New Zealand, Norway, Spain, Sweden,
Switzerland, the United Kingdom and the United States).
    

   
- - Has its principal trading market for its stock in an emerging market country
    

   
- - Derives at least 50% of its revenues or profits from operations within
emerging market countries or has at least 50% of its assets located in emerging
market countries.
    

   
UNDERVALUED STOCKS
    

   
A stock is considered undervalued if the portfolio manager believes it should be
trading at a higher price than it is at the time of purchase. Factors considered
are:
    

   
          - price relative to earnings
    

   
          - price relative to cash flow
    

   
          - price relative to financial strength
    


   
REPURCHASE AGREEMENTS
    

   
Repurchase Agreements are collateralized by obligations issued or guaranteed as 
to both principal and interest by the U.S. Government, its agencies, and 
instrumentalities. A repurchase agreement is a transaction in which a security 
is purchased with a simultaneous commitment to sell it back to the seller (a 
commercial bank or recognized securities dealer) at an agreed upon price on an 
agreed upon date. This date is usually not more than seven days from the date 
of purchase. The resale price reflects the purchase price plus an agreed upon 
market rate of interest, which is unrelated to the coupon rate or maturity of 
the purchased security.
    


HOW CAN I TELL, AT A GLANCE, A FUND'S KEY RISKS?

         The following table shows some of the main risks to which each Fund is
subject. Each risk is described in detail below.

   
<TABLE>
<CAPTION>
- ---------------------------------- ---------- ------------- ----------- ---------- ----------- -------------- ---------- -----------
                                   EMERGING   INTERNATIONAL INCOME      VALUE PLUS GROWTH &    BALANCED FUND  BOND FUND  STANDBY
                                   GROWTH     EQUITY FUND   OPPORTUNITY FUND       INCOME FUND                           INCOME FUND
                                   FUND                     FUND
- ---------------------------------- ---------- ------------- ----------- ---------- ----------- -------------- ---------- -----------
<S>                                <C>        <C>           <C>         <C>        <C>         <C>            <C>        <C>
MARKET RISK                            o           o                         o          o             o
- ---------------------------------- ---------- ------------- ----------- ---------- ----------- -------------- ---------- -----------
   EMERGING GROWTH COMPANIES           o           
- ---------------------------------- ---------- ------------- ----------- ---------- ----------- -------------- ---------- -----------
   REAL ESTATE INVESTMENT TRUSTS                                                        o
- ---------------------------------- ---------- ------------- ----------- ---------- ----------- -------------- ---------- -----------
INTEREST RATE RISK                     o           o             o           o          o             o           o            o
- ---------------------------------- ---------- ------------- ----------- ---------- ----------- -------------- ---------- -----------
   MORTGAGE-RELATED SECURITIES         o                         o                                                o            o
- ---------------------------------- ---------- ------------- ----------- ---------- ----------- -------------- ---------- -----------
CREDIT RISK                            o           o             o           o          o             o           o            o
- ---------------------------------- ---------- ------------- ----------- ---------- ----------- -------------- ---------- -----------
   NON-INVESTMENT GRADE SECURITIES                 o             o                      o             o           o
- ---------------------------------- ---------- ------------- ----------- ---------- ----------- -------------- ---------- -----------
FOREIGN INVESTING RISK                 o           o             o                      o             o           o            o
- ---------------------------------- ---------- ------------- ----------- ---------- ----------- -------------- ---------- -----------
   EMERGING MARKET RISK                o           o             o                      o             o
- ---------------------------------- ---------- ------------- ----------- ---------- ----------- -------------- ---------- -----------
   POLITICAL RISK                                  o             o
- ---------------------------------- ---------- ------------- ----------- ---------- ----------- -------------- ---------- -----------
</TABLE>
    


                                      32
<PAGE>   101
RISKS OF INVESTING IN THE FUNDS

Market Risk. A Fund that invests in common stocks is subject to stock market
risk. Stock prices in general may decline over short or even extended periods,
regardless of the success or failure of a particular company's operations. Stock
markets tend to run in cycles, with periods when stock prices generally go up
and periods when they generally go down. Common stock prices tend to go up and
down more than those of bonds.

  -      Emerging Growth Companies. Investment in Emerging Growth Companies is
         subject to enhanced risks because such companies generally have limited
         product lines, markets or financial resources and often exhibit a lack
         of management depth. The securities of such companies can be difficult
         to sell and are usually more volatile than securities of larger, more
         established companies.

   
   -     Real Estate Investment Trusts (REITs). Investment in REITs is subject
         to risks similar to those associated with the direct ownership of real
         estate (in addition to securities markets risks). REITs are sensitive
         to factors such as changes in real estate values and property taxes,
         interest rates, cash flow of underlying real estate assets, supply and
         demand, and the management skill and creditworthiness of the issuer.
         REITs may also lose value due to changes in tax or other regulatory
         requirements.
    

Interest Rate Risk. A Fund that invests in debt securities is subject to the
risk that the market value of the debt securities will decline because of rising
interest rates. The prices of debt securities are generally linked to the
prevailing market interest rates. In general, when interest rates rise, the
prices of debt securities fall, and when interest rates fall, the prices of debt
securities rise. The price volatility of a debt security also depends on its
maturity. Generally, the longer the maturity of a debt security the greater its
sensitivity to changes in interest rates. To compensate investors for this
higher risk, debt securities with longer maturities generally offer higher
yields than debt securities with shorter maturities.

   -     Mortgage-Related Securities. Payments from the pool of loans
         underlying a Mortgage-Related Security may not be enough to meet the
         monthly payments of the Mortgage-Related Security. If this occurs the
         Mortgage-Related Security will lose value. Also, prepayments of
         mortgages or mortgage foreclosures will shorten the life of the pool of
         mortgages underlying a Mortgage-Related Security and will affect the
         average life of the Mortgage-Related Securities held by a Fund.
         Mortgage prepayments vary based on several factors including the level
         of interest rates, general economic conditions, the location and age of
         the mortgage and other demographic conditions. In periods of falling
         interest rates, there are usually more prepayments. The reinvestment of
         cash received from prepayments will, therefore, usually be at a lower
         interest rate than the original investment, lowering a Fund's yield.
         Mortgage-Related Securities may be less likely to increase in value
         during periods of falling interest rates than other debt securities.

Credit Risk. The debt securities in a Fund's portfolio are subject to credit
risk. Credit risk is the possibility that an issuer will fail to make timely
payments of interest or principal. Securities rated in the lowest category of
Investment Grade securities have some risky characteristics and changes in
economic conditions are more likely to cause issuers of these securities to be
unable to make payments.


                                       33
<PAGE>   102
- -        Non-Investment Grade Securities. Non-Investment Grade securities are
         sometimes referred to as junk bonds and are very risky with respect to
         their issuers' ability to make payments of interest and principal.
         There is a high risk that a Fund which invests in Non-Investment Grade
         securities could suffer a loss caused by the default of an issuer of
         such securities. Part of the reason for this high risk is that, in the
         event of a default or bankruptcy, holders of Non-Investment Grade
         securities generally will not receive payments until the holders of all
         other debt have been paid. In addition, the market for Non-Investment
         Grade securities has, in the past, had more frequent and larger price
         changes than the markets for other securities. Non-Investment Grade
         securities can also be more difficult to sell for good value.

Foreign Investing. Investing in foreign securities poses unique risks such as
fluctuation in currency exchange rates, market illiquidity, price volatility,
high trading costs, difficulties in settlement, regulations on stock exchanges,
limits on foreign ownership, less stringent accounting, reporting and disclosure
requirements, and other considerations. In the past, equity and debt instruments
of foreign markets have had more frequent and larger price changes than those of
U.S. markets.

- -        Emerging Markets Risk. Investments in a country that is still
         relatively underdeveloped involves exposure to economic structures that
         are generally less diverse and mature than in the U.S. and to political
         and legal systems which may be less stable. In the past, markets of
         developing countries have had more frequent and larger price changes
         than those of developed countries.

   

- -        Political Risk. Political risk includes a greater potential for
         revolts, and the taking of assets by governments. For example, a Fund
         may invest in Eastern Europe and former states of the Soviet Union.
         These countries were under communist systems that took control of
         private industry. This could occur again in this region or others in
         which a Fund may invest, in which case the Fund may lose all or part of
         its investment in that country's issuers.
    


                                       34
<PAGE>   103
                              THE FUNDS' MANAGEMENT

INVESTMENT ADVISOR
   

Touchstone Advisors, Inc., (the Advisor or Touchstone Advisors) located at 311
Pike Street, Cincinnati, Ohio 45202 is the investment advisor of the Funds.
    

Touchstone Advisors has been registered as an investment advisor under the
Investment Advisers Act of 1940, as amended (the Advisers Act) since 1994. As of
June 30, 1998, Touchstone Advisors had $361 million in assets under management.

Touchstone Advisors is responsible for selecting Fund Sub-Advisors who have
shown good investment performance in their areas of expertise. The Board of
Trustees of the Trust reviews and must approve the Advisor's selections.
Touchstone considers various factors in evaluating Fund Sub-Advisors, including:

             -      level of knowledge and skill
             -      performance as compared to its peers or benchmark
             -      consistency of performance over five years or more 
             -      level of compliance with investment rules and strategies 
             -      employees, facilities and financial strength 
             -      quality of service

Touchstone will also continually monitor each Fund Sub-Advisor's performance
through various analyses and through in-person, telephone and written
consultations with the Fund Sub-Advisors.

Touchstone discusses its expectations for performance with each Fund
Sub-Advisor. Touchstone provides written evaluations and recommendations to the
Board of Trustees, including whether or not each Fund Sub-Advisor's contract
should be renewed, modified or terminated.

Touchstone is also responsible for running all of the operations of the Funds,
except for those that are subcontracted to the Fund Sub-Advisors, custodian,
transfer agent and administrator.

Two or more Fund Sub-Advisors may manage a Fund, with each managing a portion of
the Fund's assets. If a Fund has more than one Fund Sub-Advisor, Touchstone
allocates how much of a Fund's assets are managed by each Sub-Advisor.
Touchstone may change these allocations from time to time, often based upon the
results of the evaluations of the Fund Sub-Advisors.

Each Fund pays Touchstone a fee for its services. Out of this fee Touchstone
pays each Fund Sub-Advisor a fee for its services.

   
The fee paid to Touchstone by each Fund is shown in the table below.
    


                                       35
<PAGE>   104
      -------------------------------      ----------------------------
      FUND                                 FEE TO TOUCHSTONE
                                           (AS % OF AVERAGE DAILY NET
                                           ASSETS)
      -------------------------------      ----------------------------
      Emerging Growth Fund                 0.80%
      -------------------------------      ----------------------------
      International Equity Fund            0.95%
      -------------------------------      ----------------------------
      Income Opportunity Fund              0.65%
      -------------------------------      ----------------------------
      Value Plus Fund                      0.75%
      -------------------------------      ----------------------------
      Growth & Income Fund                 0.80%
      -------------------------------      ----------------------------
      Balanced Fund                        0.80%
      -------------------------------      ----------------------------
      Bond Fund                            0.55%
      -------------------------------      ----------------------------
      Standby Income Fund                  0.25%
      -------------------------------      ----------------------------
                                           
FUND SUB-ADVISORS                     

The Fund Sub-Advisors make the day-to-day decisions regarding buying and selling
specific securities for a Fund. Each Fund Sub-Advisor manages the investments
held by the Fund it serves according to the applicable investment goals and
strategies.

   
DAVID L. BABSON & COMPANY, INC. (Babson)
One Memorial Drive, Cambridge, Massachusetts 02142-1300
    

A FUND SUB-ADVISOR TO THE EMERGING GROWTH FUND

   
Babson has been registered as an investment advisor under the Advisers Act since
1940. Babson provides investment advisory services to individual and
institutional clients. As of June 30, 1998, Babson and affiliates had assets
under management of $21.1 billion. Babson has been managing the Emerging Growth
Fund since the Fund's inception.
    

Dennis J. Scannell , Peter C. Schliemann and Lance F. James have primary
responsibility for the day-to-day management of the Fund. Mr. Scannell has been
with the firm since 1993, Mr. Schliemann has been with Babson since 1979, and
Mr. James has been with the firm since 1986.

   
WESTFIELD CAPITAL MANAGEMENT COMPANY, INC. (Westfield)
One Financial Center, Boston, Massachusetts 02111
    

A FUND SUB-ADVISOR TO THE EMERGING GROWTH FUND

   
Westfield has been registered as an investment advisor under the Advisers Act
since 1989. Westfield provides investment advisory services to individual and
institutional clients. As of June 30, 1998, Westfield had assets under
management of $1.5 billion. Westfield has been managing the Emerging Growth Fund
since the Fund's inception.
    


   
Michael J. Chapman has managed the portion of the Emerging Growth Fund's assets
allocated to Westfield by the Advisor since October, 1994. Mr. Chapman (CFA) has
been with Westfield since 1990.
    


                                       36
<PAGE>   105
   
CREDIT SUISSE ASSET MANAGEMENT (Credit Suisse)
One Citicorp Center, 153 East 53rd Street, New York, New York 10022
    

FUND SUB-ADVISOR TO THE INTERNATIONAL EQUITY FUND

   
Credit Suisse has been registered as an investment advisor under the Advisers
Act since 1968. Credit Suisse provides investment advisory services to
individual and institutional clients. As of June 30, 1998, Credit Suisse had
assets under management of $35.6 billion. Credit Suisse has been managing the
International Equity Fund since the Fund's inception.
    

   
The Fund is managed by the Credit Suisse International Equity Management Team.
The team consists of William Sterling, Richard Watt, Steven D. Bleiberg, Susan
Boland, Emily Alejos and Robert B. Hrabchak.
    

   
ALLIANCE CAPITAL MANAGEMENT L.P. (Alliance)
1345 Avenue of the Americas, New York, New York 10105
    

FUND SUB-ADVISOR TO THE INCOME OPPORTUNITY FUND

   
Alliance has been registered as an investment advisor under the Advisers Act
since 1971. Alliance provides investment advisory services to individual and
institutional clients. As of June 30, 1998, Alliance had assets under management
of $263 billion. Alliance has been managing the Income Opportunity Fund since
the Fund's inception.
    

Wayne Lyski and Vicki Fuller have primary responsibility for the day-to-day
management of the Fund. Mr. Lyski has been with Alliance since 1983. Ms. Fuller
(CPA) has been with Alliance, and its predecessors, since 1985.

   
FORT WASHINGTON INVESTMENT ADVISORS, INC. (Fort Washington)
420 East Fourth Street, Cincinnati, Ohio 45202
    

FUND SUB-ADVISOR TO THE VALUE PLUS FUND, BOND FUND, AND STANDBY INCOME FUND

   
Fort Washington has been registered as an investment advisor under the Advisers
Act since 1990. Fort Washington provides investment advisory services to
individual and institutional clients. As of June 30, 1998, Fort Washington had
assets under management of $9.8 billion. Fort Washington has been managing the
Value Plus Fund, the Bond Fund and the Standby Income Fund since each Fund's
inception.
    

VALUE PLUS FUND: John C. Holden has managed the Value Plus Fund since May 1998.
Mr. Holden (CFA) joined Fort Washington in May 1997 and is Vice President and
Senior Portfolio Manager. Mr. Holden previously served as senior portfolio
manager with Mellon Private Asset Management in Pittsburgh, senior portfolio
manager and investment analyst for Star Bank's Stellar Performance Group in
Cincinnati, and senior employee benefit portfolio manager for First Kentucky
Trust Company in Louisville.

   
BOND FUND: Roger Lanham and Brendan White have managed the Bond Fund since
October, 1994. Mr. Lanham is a CFA and has been with Fort Washington since 1980.
Mr. White is a CFA and has been with Fort Washington since 1993.
    


                                       37
<PAGE>   106


   
STANDBY INCOME FUND: Christopher J. Mahony has managed the Standby Income Fund
since October, 1994. Mr. Mahony joined Fort Washington in 1994 after eight years
of investment experience with Neuberger & Berman.
    

   
Fort Washington is an affiliate of Touchstone. Therefore, Touchstone may have a
conflict of interest when making decisions to keep Fort Washington as a Fund
Sub-Advisor. The Board of Trustees reviews all of Touchstone's decisions to
reduce the possibility of a conflict of interest situation.
    

   
SCUDDER KEMPER INVESTMENTS, INC. (Scudder Kemper)
345 Park Avenue, New York, New York
    

FUND SUB-ADVISOR TO THE GROWTH & INCOME FUND

   
Scudder Kemper and its predecessors have provided investment advisory services
to mutual fund investors, retirement and pension plans, institutional and
corporate clients, insurance companies, and private family and individual
accounts since 1943. As of June 30, 1998, Scudder Kemper had assets under
management of $235 billion. Scudder Kemper has been managing the Growth &
Income Fund since June 1997.
    

Robert T. Hoffman, Lori Ensinger, Benjamin W. Thorndike and Kathleen T. Millard
have primary responsibility for the day-to-day management of the Fund. Mr.
Hoffman, Lead Product Manager, joined Scudder in 1990. He has 13 years of
experience in the investment industry, including several years of pension fund
management experience. Lori Ensinger, Lead Portfolio Manager, focuses on stock
selection and investment strategy. She has been a portfolio manager since 1983
and joined Scudder in 1993. Benjamin W. Thorndike, Portfolio Manager, is the
Fund's chief analyst and strategist for convertible securities. Mr. Thorndike
has 18 years of investment experience, joined Scudder in 1983. Kathleen T.
Millard, Portfolio Manager and has worked as a portfolio manager since 1986. Ms.
Millard, who joined Scudder in 1991, focuses on strategy and stock selection.

   
OPCAP ADVISORS (OpCap)
Oppenheimer Tower, One World Financial Center, New York, NY 10281
    

FUND SUB-ADVISOR TO THE BALANCED FUND

   
OpCap is a subsidiary of Oppenheimer Capital. Oppenheimer Capital has been
registered as an investment advisor under the Advisers Act since 1968 and its
employees perform all investment advisory services provided to the Fund. As of
June 30, 1998, Oppenheimer Capital and its subsidiaries had assets under
management of $67.3 billion. OpCap has been managing the Balanced Fund since May
1997.
    

   
Alan Gutmann has managed the equity portion of the Balanced Fund since June,
1997. Robert J. Bluestone and Matthew Greenwald have managed the fixed-income
portion of the Balanced Fund since June, 1997. Mr. Gutmann joined Oppenheimer
Capital in 1991 and is Vice President. Mr. Bluestone joined Oppenheimer Capital
in 1986 and is Managing Director. Mr. Greenwald joined Oppenheimer Capital in
1989 and is Vice President.
    


                                       38
<PAGE>   107
                            INVESTING WITH TOUCHSTONE


   
    


INVESTING IN THE FUNDS

   
    

   
Class Y shares of each Fund are currently offered only to The Western and 
Southern Life Insurance Company Separate Account A.
    


- - INVESTOR ALERT: Touchstone may choose to refuse any purchase order.

PRICING OF FUND SHARES

   
Each Fund's share price, also called net asset value (NAV), is determined as of
the close of trading (normally 4:00 p.m., Eastern time) every day the New York
Stock Exchange (NYSE) is open. The fund calculates the NAV per share, generally
using market prices, by dividing the total value of each class' net assets by
the number of the class shares outstanding. Shares are purchased at the next
offering price determined after your purchase or sale order is received in
proper form by Touchstone. The offering price is the NAV plus a sales charge, if
applicable.
    


                                       39
<PAGE>   108
The Fund's investments are valued based on market value or, if no market value
is available, based on fair value as determined by the Board of Trustees (or
under their direction). All assets and liabilities initially expressed in
foreign currency values will be converted into U.S. dollar values. Some specific
pricing strategies follow:

- - All short-term dollar-denominated investments that mature in 60 days or less
are valued on the basis of amortized cost which the Board of Trustees has
determined represents fair value.

- - Securities mainly traded on a U.S. exchange are valued at the last sale price
on that exchange or, if no sales occurred during the day, at the current quoted
bid price.

   
- - Securities mainly traded on a non-U.S. exchange are generally valued according
to the preceding closing values on that exchange. However, if an event which 
may change the value of a security occurs after the time that the closing value 
on the non-U.S. exchange was determined, the Board of Trustees might decide to 
value the security based on fair value. This may cause the value of the 
security on the books of the fund to be significantly different from the 
closing value on the non-U.S. exchange and may affect the calculation of NAV.
    


   
- - Because portfolio securities that are primarily listed on non-U.S. exchange
may trade on weekends or other days when a Fund does not price its shares, a
Fund's NAV may change on days when shareholders will not be able to buy or sell
shares.
    

CHOOSING A CLASS OF SHARES

Each of the Funds (other than the Standby Income Fund) offers three classes of
shares - Class A shares, Class C shares and Class Y shares. This Prospectus only
offers Class Y shares. Each class of shares charges different sales charges and
distribution or service fees. The amount of sales charges and other fees you pay
will depend on which class of shares you decide to purchase.

Class Y shares are only available for purchase by pension plans.

The Standby Income Fund does not have share classes and it does not charge sales
charges, distribution fees or service fees. The Standby Income Fund may be
purchased by all investors.

CLASS Y SHARES

The offering price of each Class Y share is equal to its NAV. No sales charge is
applied at any time.

No distribution or service fees are charged on Class Y Shares.

   
    



                                       40
<PAGE>   109

   
    

                             DISTRIBUTIONS AND TAXES

DISTRIBUTIONS

Each Touchstone Fund intends to distribute to its shareholders substantially all
of its income and capital gains. The table below outlines when dividends are
declared and paid for each Fund.


                                       41
<PAGE>   110
<TABLE>
<CAPTION>
- --------------------------------------------------------------------------------
                 FUND                       DIVIDENDS DECLARED    DIVIDENDS PAID
- --------------------------------------------------------------------------------
<S>                                         <C>                   <C>
Standby Income Fund                                Daily             Monthly
- --------------------------------------------------------------------------------
Growth & Income Fund, Income Opportunity          Monthly            Monthly
Fund and Bond Fund
- --------------------------------------------------------------------------------
Value Plus Fund and Balanced Fund                Quarterly          Quarterly
- --------------------------------------------------------------------------------
Emerging Growth Fund and International           Annually            Annually
Equity Fund
- --------------------------------------------------------------------------------
</TABLE>

Distributions of any capital gains earned by a Fund will be made at least
annually.

TAX INFORMATION

   
DISTRIBUTIONS: Each Fund will make distributions that may be taxed as ordinary
income or capital gains (which may be taxed at different rates depending on the
length of time a Fund holds its assets). Each Fund's distributions may be
subject to federal income tax whether reinvested in additional shares of a Fund 
or received in cash.
    


   
SPECIAL TAX CONSIDERATION: Selling your shares may cause you to incur a taxable 
gain or loss. 
    


                                       42
<PAGE>   111
   
FOR MORE INFORMATION
    

For investors who want more information about the Funds, the following documents
are available free upon request:

STATEMENT OF ADDITIONAL INFORMATION (SAI): The SAI provides more detailed
information about the Funds and is legally a part of this prospectus.

ANNUAL/SEMI-ANNUAL REPORTS: The Funds' annual and semi-annual reports provide
additional information about the Funds' investments. In each Fund's annual
report, you will find a discussion of the market conditions and investment
strategies that significantly affected the Fund's performance during its last
fiscal year.

You can get free copies of the SAI, the reports, other information and answers
to your questions about the Funds by contacting your financial advisor, or the
Funds at:

                           Touchstone Family of Funds
                                 311 Pike Street
                             Cincinnati, Ohio 45202
                            (800) 669-2796 (Press 3)
                         http://www.touchstonefunds.com

You can view the Funds' SAI and the reports at the Public Reference Room of the
Securities and Exchange Commission.

   
For a fee, you can get text-only copies by writing to the Public Reference Room
of the SEC, 450 Fifth Street N.W., Washington, D.C. 20549-6009. You can also
call 1-800-SEC-0330.
    

   
You can also view the SAI and the reports free from the SEC's Internet website
at http://www.sec.gov.
    


Investment Company Act file no. 811-8380




                           TOUCHSTONE FAMILY OF FUNDS


                         Touchstone Emerging Growth Fund

                      Touchstone International Equity Fund

                       Touchstone Income Opportunity Fund

                           Touchstone Value Plus Fund

                         Touchstone Growth & Income Fund

                            Touchstone Balanced Fund

                              Touchstone Bond Fund

                         Touchstone Standby Income Fund


                               Class Y Shares are
                                Offered by this
                                   Prospectus


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