EX-99.77B ACCT LTTR

                                                                     Exhibit 77B

            Report of Independent Registered Public Accounting Firm

To the Shareholders and Board of Directors
of the RiverSource Money Market Series, Inc.

In planning and performing our audit of the financial statements of the
RiverSource Cash Management Fund which comprises the RiverSource Money Market
Series, Inc. (the Fund) as of and for the year ended July 31, 2009, in
accordance with the standards of the Public Company Accounting Oversight Board
(United States), we considered the Fund's internal control over financial
reporting, including controls over safeguarding securities, as a basis for
designing our auditing procedures for the purpose of expressing our opinion on
the financial statements and to comply with the requirements of Form N-SAR, but
not for the purpose of expressing an opinion on the effectiveness of the Fund's
internal control over financial reporting. Accordingly, we express no such
opinion.

The management of the Fund is responsible for establishing and maintaining
effective internal control over financial reporting. In fulfilling this
responsibility, estimates and judgments by management are required to assess the
expected benefits and related costs of controls. A fund's internal control over
financial reporting is a process designed to provide reasonable assurance
regarding the reliability of financial reporting and the preparation of
financial statements for external purposes in accordance with generally accepted
accounting principles. A fund's internal control over financial reporting
includes those policies and procedures that (1) pertain to the maintenance of
records that, in reasonable detail, accurately and fairly reflect the
transactions and dispositions of the assets of the fund; (2) provide reasonable
assurance that transactions are recorded as necessary to permit preparation of
financial statements in accordance with generally accepted accounting
principles, and that receipts and expenditures of the fund are being made only
in accordance with authorizations of management and directors of the fund; and
(3) provide reasonable assurance regarding prevention or timely detection of
unauthorized acquisition, use or disposition of a fund's assets that could have
a material effect on the financial statements.

Because of its inherent limitations, internal control over financial reporting
may not prevent or detect misstatements. Also, projections of any evaluation of
effectiveness to future periods are subject to the risk that controls may become
inadequate because of changes in conditions, or that the degree of compliance
with the policies or procedures may deteriorate.

A deficiency in internal control over financial reporting exists when the design
or operation of a control does not allow management or employees, in the normal
course of performing their assigned functions, to prevent or detect
misstatements on a timely basis. A material weakness is a deficiency, or a
combination of deficiencies, in internal control over financial reporting, such
that there is a reasonable possibility that a material misstatement of the
fund's annual or interim financial statements will not be prevented or detected
on a timely basis.



Our consideration of the Fund's internal control over financial reporting was
for the limited purpose described in the first paragraph and would not
necessarily disclose all deficiencies in internal control that might be material
weaknesses under standards established by the Public Company Accounting
Oversight Board (United States). However, we noted no deficiencies in the Fund's
internal control over financial reporting and its operation, including controls
over safeguarding securities, that we consider to be a material weakness as
defined above as of July 31, 2009.

This report is intended solely for the information and use of management and the
Board of Directors of the RiverSource Money Market Series, Inc. and the
Securities and Exchange Commission and is not intended to be and should not be
used by anyone other than these specified parties.


                                      /s/ Ernst & Young LLP

Minneapolis, MN
September 21, 2009

EX-99.77E LEGAL

                                                                     EXHIBIT 77E

LEGAL PROCEEDINGS. Ameriprise Financial and certain of its affiliates have
historically been involved in a number of legal, arbitration and regulatory
proceedings, including routine litigation, class actions, and governmental
actions, concerning matters arising in connection with the conduct of their
business activities. Ameriprise Financial believes that the fund is not
currently the subject of, and that neither Ameriprise Financial nor any of its
affiliates are the subject of, any pending legal, arbitration or regulatory
proceedings that are likely to have a material adverse effect on the fund or the
ability of Ameriprise Financial or its affiliates to perform under their
contracts with the fund. Information regarding certain pending and settled legal
proceedings may be found in the Fund's shareholder reports and in the SAI.
Additionally, Ameriprise Financial is required to make 10-Q, 10-K and, as
necessary, 8-K filings with the Securities and Exchange Commission on legal and
regulatory matters that relate to Ameriprise Financial and its affiliates.
Copies of these filings may be obtained by accessing the SEC website at
www.sec.gov.

EX-99.77N RULE 2A-7

FOR RIVERSOURCE MONEY MARKET SERIES, INC.:

EXHIBIT 77N

RIVERSOURCE CASH MANAGEMENT FUND

WhistleJacket Capital LLC (WJC), a structured investment vehicle (SIV) owned by
the Fund, breached a financial covenant on Feb. 11, 2008 relating to the market
value of its underlying collateral, resulting in the occurrence of an
"enforcement event." This resulted in the appointment of receivers on Feb. 12,
2008. On Feb. 15, 2008 the receivers declared WJC to be insolvent. The Fund's
positions in WJC went into default as of their respective maturity dates. At a
meeting of the Executive Committee of the Fund's Board of Directors (the Board)
on Feb. 9, 2009, RiverSource Investments, LLC (RiverSource), the Fund's
investment manager, recommended and the Board approved based on the
recommendation and other factors, the purchase by Ameriprise Financial Inc.
(Ameriprise), the parent company of RiverSource, of a portion of the WJC
holdings from the Fund ($16 million), which occurred between March 6, 2009 and
April 21, 2009 for cash at a price equal to amortized cost plus accrued interest
in accordance with Rule 17a-9 of the Investment Company Act of 1940, as amended
(the 1940 Act). The Fund recorded $3.5 million as payments by an affiliate,
which is equal to the aggregate difference between the fair value of WJC and the
cash received from Ameriprise Financial on each purchase date.

From June 8, 2009 through July 31, 2009, due to realized losses of the Fund,
Ameriprise Financial has paid approximately $1.0 million to the Fund to provide
support to the Fund's $1.00 net asset value per share. These amounts are
recorded as increase from payments by affiliate on the Statement of Operations.
Subsequent to July 31, 2009 and through September 21, 2009 (date of issuance of
the Fund's financial statements), additional support payments have been made by
Ameriprise Financial amounting to approximately $8.2 million.

Pursuant to the Fund's pricing procedures, securities are valued utilizing the
amortized cost method permitted in accordance with Rule 2a-7 under the 1940 Act.
Rule 2a-7 also requires periodic monitoring (Shadow Pricing) of the deviation
between the net asset value per share of the Fund using the amortized cost
method and the net asset value per share determined based on fair value to
ensure that the amortized cost method continues to provide an appropriate net
asset value per share for the Fund in accordance with Rule 2a-7.

For the year ended July 31, 2009, all investments held by the Fund, including
WJC, were valued at amortized cost in compliance with Rule 2a-7 procedures. In
addition, for the same time period the deviations resulting from the Shadow
Pricing procedures were not material to the Fund's $1.00 net asset value per
share.

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