FORM 6-K

                       SECURITIES AND EXCHANGE COMMISSION

                             Washington, D.C. 20549

                        Report of Foreign Private Issuer
                    Pursuant to Rule 13a - 16 or 15d - 16 of
                      the Securities Exchange Act of 1934

                          For the month of August, 2005

                               HSBC Holdings plc

                              42nd Floor, 8 Canada
                        Square, London E14 5HQ, England


(Indicate by check mark whether the registrant files or will file annual
reports under cover of Form 20-F or Form 40-F).

                          Form 20-F X Form 40-F ......

(Indicate by check mark whether the registrant by furnishing the information
contained in this Form is also thereby furnishing the information to the
Commission pursuant to Rule 12g3-2(b) under the Securities Exchange Act of
1934).

                                Yes....... No X


(If "Yes" is marked, indicate below the file number assigned to the registrant
in connection with Rule 12g3-2(b): 82- ..............)







                                                                    Exhibit 32.0

Certification of Chief Executive Officer and Chief Financial Officer pursuant to
Section 906 of the Sarbanes-Oxley Act of 2002.
--------------------------------------------------------------------------------

Pursuant to section 906 of the Sarbanes-Oxley Act of 2002 (subsections (a) and
(b) of section 1350, chapter 63 of title 18, United States Code), each of the
undersigned officers of HSBC USA Inc., a Maryland corporation (HUSI), does
hereby certify, to such officer's knowledge, that:

The Quarterly Report on Form 10-Q for the quarter ended June 30, 2005 (the Form
10-Q) of HUSI fully complies with the requirements of section 13(a) or 15(d) of
the Securities Exchange Act of 1934 and information contained in the Form 10-Q
fairly presents, in all material respects, the financial condition and results
of operations of HUSI.


Date: August 1, 2005                     /s/ Martin J. G. Glynn
                                         ---------------------------------------
                                         Martin J. G. Glynn
                                         President and Chief Executive Officer


Date:  August 1, 2005                    /s/ Roger K. McGregor
                                         ---------------------------------------
                                         Roger K. McGregor
                                         Senior Executive Vice President and
                                         Chief Financial Officer

The foregoing certification is being furnished solely pursuant to section 906 of
the Sarbanes-Oxley Act of 2002 (subsections (a) and (b) of section 1350, chapter
63 of title 18, United States Code) and is not being filed as part of the Form
10-Q or as a separate disclosure document.

A signed original of this written statement required by Section 906, or other
document authenticating, acknowledging, or otherwise adopting the signature that
appears in typed form within the electronic version of this written statement
required by Section 906, has been provided to HSBC USA Inc. and will be retained
by HSBC USA Inc. and furnished to the United States Securities and Exchange
Commission or its staff upon request.


                                       55


                                    SIGNATURE

Pursuant to the requirements of the Securities Exchange Act of 1934, the
registrant has duly caused this report to be signed on its behalf by the
undersigned, thereunto duly authorized.

                               HSBC Holdings plc

                                                By:
                                                Name:  P A Stafford
                                                Title: Assistant Group Secretary
                                                Date:  01 August 2005