Standard & Poors Ratings Services is adjusting the ratings on 37 of the world's largest financial institutions, including downgrading the biggest banks in the U.S.

Bank of America Corp. and its main subsidiaries were among those cut at least one notch on Tuesday, along with Citigroup Inc., Goldman Sachs Group Inc., JPMorgan Chase & Co., Morgan Stanley and Wells Fargo & Co.

S&P says the changes reflect its new ratings criteria for banks, which incorporate shifts in the worldwide financial industry and macroeconomic trends, including the role of governments and central banks in industry funding.

Top U.K. downgrades include Barclays, HSBC Holdings, Lloyds Banking Group and The Royal Bank of Scotland.

Ratings for several big European banks, including Credit Suisse, Deutsche Bank, ING and Societe Generale are unchanged.

(Copyright 2011 by The Associated Press.  All Rights Reserved.)

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