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                                                                    (RIVERSOURCE
INVESTMENTS LOGO)
                    PROSPECTUS SUPPLEMENT -- MARCH 3, 2008*

                                                                                         
RiverSource Short Duration U.S. Government Fund (7/30/07)                                   S-6042-99 AD



The following replaces the Fees and Expenses section of the prospectus:

FEES AND EXPENSES

Fund investors pay various expenses. The table below describes the fees and
expenses that you may pay if you buy and hold shares of the Fund. Expenses are
based on the Fund's most recent fiscal year, adjusted to reflect current fees.

SHAREHOLDER FEES (FEES PAID DIRECTLY FROM YOUR INVESTMENT)




                                                                                                 CLASS I
                                                                                                  CLASS
                                                                                                  R4(b)
                                                                CLASS A    CLASS B    CLASS C    CLASS W
                                                                                     

 Maximum sales charge (load) imposed on purchases
 (as a percentage of offering price)                             3.00%(a)   None       None         None
 Maximum deferred sales charge (load) imposed on sales
 (as a percentage of offering price at time of purchase)          None        5%         1%         None


ANNUAL FUND OPERATING EXPENSES (EXPENSES THAT ARE DEDUCTED FROM FUND ASSETS)




AS A PERCENTAGE OF AVERAGE DAILY NET ASSETS:
                                                                CLASS A    CLASS B    CLASS C    CLASS W
                                                                                     

 Management fees                                                 0.48%      0.48%      0.48%      0.48%
 Distribution (12b-1) fees                                       0.25%      1.00%      1.00%      0.25%
 Other expenses(c)                                               0.30%      0.31%      0.32%      0.28%
 Total annual fund operating expenses                            1.03%      1.79%      1.80%      1.01%
 Fee waiver/expense reimbursement                                0.14%      0.14%      0.15%      0.05%
 Total annual (net) fund operating expenses(d)                   0.89%      1.65%      1.65%      0.96%





                                                                CLASS I    CLASS R4(b)
                                                                     

 Management fees                                                 0.48%        0.48%
 Distribution (12b-1) fees                                       0.00%        0.00%
 Other expenses(c)                                               0.11%        0.41%
 Total annual fund operating expenses                            0.59%        0.89%
 Fee waiver/expense reimbursement                                0.08%        0.13%
 Total annual (net) fund operating expenses(d)                   0.51%        0.76%


(a)  This charge may be reduced depending on the value of your total investments
     in RiverSource Funds. See "Sales Charges."
(b)  Effective Dec. 11, 2006, the following changes were implemented: renaming
     Class Y as Class R4, terminating the shareholder servicing agreement,
     revising the fee structure under the transfer agent agreement from
     account-based to asset-based, and adopting a plan administration services
     agreement.
(c)  Other expenses include an administrative services fee, a transfer agency
     fee, a custody fee, other nonadvisory expenses and, for Class R4, a plan
     administration services fee. Other expenses may also include fees and
     expenses of affiliated and unaffiliated funds (acquired funds) which the
     Fund indirectly bears when it invests in the acquired funds. Because
     acquired funds will have varied expense and fee levels and the Fund may own
     different proportions of acquired funds at different times, the amount of
     fees and expenses incurred by the Fund with respect to such investments
     will vary.
(d)  The investment manager and its affiliates have contractually agreed to
     waive certain fees and to absorb certain expenses until May 31, 2008,
     unless sooner terminated at the discretion of the Fund's Board. Any amounts
     waived will not be reimbursed by the Fund. Under this agreement, net fund
     expenses (excluding fees and expenses of acquired funds) will not exceed
     0.89% for Class A, 1.65% for Class B, 1.65% for Class C, 0.51% for Class I,
     0.76% for Class R4 and 0.96% for Class W.

- --------------------------------------------------------------------------------
S-6042-1 A (3/08)
* Valid until next prospectus update.


EXAMPLES

These examples are intended to help you compare the cost of investing in the
Fund with the cost of investing in other mutual funds.

These examples assume that you invest $10,000 in the Fund for the time periods
indicated and then redeem all of your shares at the end of those periods. These
examples also assume 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:



                                                                  1 YEAR      3 YEARS      5 YEARS      10 YEARS
                                                                                            

 Class A(a)                                                        $388        $605        $  839        $1,514
 Class B                                                           $668(b)     $950(b)     $1,158(b)     $1,898(c)
 Class C                                                           $268(b)     $552        $  962        $2,109
 Class I                                                           $ 52        $181        $  322        $  734
 Class R4                                                          $ 78        $271        $  481        $1,088
 Class W                                                           $ 98        $317        $  554        $1,236


(a)  Includes a 3.00% sales charge.
(b)  Includes the applicable CDSC.
(c)  Based on conversion of Class B shares to Class A shares in the ninth year
     of ownership.

You would pay the following expenses if you did not redeem your shares:



                                                                  1 YEAR      3 YEARS      5 YEARS      10 YEARS
                                                                                            

 Class A(a)                                                        $388        $605        $  839        $1,514
 Class B                                                           $168        $550        $  958        $1,898(b)
 Class C                                                           $168        $552        $  962        $2,109
 Class I                                                           $ 52        $181        $  322        $  734
 Class R4                                                          $ 78        $271        $  481        $1,088
 Class W                                                           $ 98        $317        $  554        $1,236


(a)  Includes a 3.00% sales charge.
(b)  Based on conversion of Class B shares to Class A shares in the ninth year
     of ownership.

S-6042-1 A (3/08)