JP Morgan headquarters on Park Avenue in New York.

JPMorgan Chase won a court victory today that may have saved it $769 million dollars. The case could also let other banks off the hook in future fraud suits related to mortgage-backed securities.

FSA Asset Management and subsidiaries of the French bank Dexia sought damages of $774 million for fraud in 65 mortgage-backed securities sold by Bear Stearns, JPMorgan, or Washington Mutual, according to court documents.