Some of the largest investors of residential mortgage-backed securities originated by Option One Mortgage are pressing the firm to buy back loans they claim were improperly originated or documented and sold into securitization trusts. Option One, now known as Sand Canyon, is a subsidiary of H&R Block. Talcott Franklin, the law firm representing the investors, said its clients currently hold 25% of the voting rights in at least 74 trusts containing Option One loans.
