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, 2006

                               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- ..............)




                      HSBC ISSUANCE OF SUBORDINATED NOTES

On 23 August 2006, HSBC Holdings plc issued US$400,000,000 of 6.5% Subordinated
Notes due 2036 (the "New Notes"). The New Notes form a part of the same series
as, and are fungible with, the outstanding US$900,000,000 6.5% Subordinated
Notes due 2036 issued by HSBC Holdings plc on 3 May 2006 (the "Existing Notes"
and, together with the New Notes, the "Notes").

The aggregate principal amount of Notes of this series now outstanding is
US$1,300,000,000. The Existing Notes are listed on the New York Stock Exchange.
Application has been made to list the New Notes issued on 23 August 2006 on the
New York Stock Exchange.


                                    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:  25 August 2006