The Federal Home Loan Bank of San Francisco sued nine securities dealers alleging they misled it about the credit quality and risks of loans behind $19.1 billion in private-label residential mortgage-backed securities.

Units of Credit Suisse Group AG, Deutsche Bank AG, JPMorgan Chase & Co. and Bank of America Corp. were among the defendants named in two securities complaints filed yesterday in state court in San Francisco, according to the court’s Web site. The bank is seeking to rescind its purchases of the securities, which were rated AAA “based on the information provided by the securities dealers,” the Federal Home Loan Bank said in a statement on its Web site.

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