SAN FRANCISCO -- Moody's Investors Service on Monday revised the outlook on HSBC Holdings' Aa2 long-term senior debt rating to negative from stable and cut HSBC Bank's bank financial strength rating to C+ from B. The bank's debt and deposit ratings were also downgraded to Aa2 from Aa1. The change in outlook to negative on HSBC Holdings' long-term debt rating reflects increasing pressures on the profitability and capital of the group as the credit crunch develops into a global phenomenon, Moody's said. Still, the ratings agency considers HSBC Holdings to be one of the more resilient global banks, with the capacity to continue to generate capital over the medium term through earnings.