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 February, 2007

                               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 TRADING UPDATE - US MORTGAGE SERVICES

HSBC Holdings plc wishes to update the pre-close  trading  statement issued on 5
December 2006 in respect of a single matter.

That trading  statement  included comments on the challenges within the Mortgage
Services  operations of HSBC Finance  Corporation,  in particular in relation to
certain loans acquired in 2005 and 2006. Given these challenges, the Group Chief
Executive,  Michael Geoghegan is continuing to directly coordinate the necessary
actions to manage the Group's response.

The impact of slowing  house  price  growth is being  reflected  in  accelerated
delinquency trends across the US sub-prime mortgage market,  particularly in the
more recent loans, as the absence of equity appreciation is reducing refinancing
options.  Slower  prepayment  speeds are also  highlighting the likely impact on
delinquency  of  higher  contractual  payment  obligations  as  adjustable  rate
mortgages reset over the next few years from their original lower rates.

We have  reviewed  critically  the impact of these  factors in  determining  the
appropriate  level of  provisioning  at 31 December  2006  against the  Mortgage
Services  loan  book.  We have  taken  account  of the  most  recent  trends  in
delinquency  and loss severity and projected the probable  effects of re-setting
interest rates on adjustable rate mortgages,  in particular in respect of second
lien mortgages.  It is clear that the level of loan impairment  provisions to be
accounted for as at the end of 2006 in respect of Mortgage  Services  operations
will be higher than is reflected in current market estimates.

We now expect that the impact of increased provisioning in this area will be the
major factor in bringing  the  aggregate  of loan  impairment  charges and other
credit risk provisions to be reflected in the accounts of the Group for the year
ended 31 December 2006 above  consensus  estimates^ by some 20 per cent. This is
subject to final review and subject to external audit.

Generally,  apart from the Mortgage Services operations,  the performance of the
HSBC Group's businesses for 2006 was in line with our latest expectations.

Further  information  will be provided in the Group's 2006 results  announcement
and the annual  report and  accounts,  which are due to be  released  on 5 March
2007.


Footnote

^ Consensus  estimate based on the average for loan impairment charges and other
credit risk  provisions  of US$8.8  billion  from the most recent  reports of 11
analysts.

Note to editors:

HSBC Holdings plc

HSBC Holdings plc serves over 125 million customers worldwide through some 9,500
offices in 81 countries and territories in Europe, the Asia-Pacific  region, the
Americas, the Middle East and Africa. With assets of US$1,738 billion at 30 June
2006,  HSBC  is  one of the  world's  largest  banking  and  financial  services
organisations.


                                    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:  08 February 2007