Mortgage-backed securities holders are pushing for a resolution of a 50-state probe of foreclosure practices, attorneys general in Iowa and Arizona said as talks with lenders and servicers expand to include investors. “The mortgage backed securities are worth pennies on the dollar, so any kind of recovery would be better,” Arizona Attorney General Terry Goddard said in an interview. Owners of mortgage-backed securities are “one of the players urging a resolution,” he said. State officials have begun informal talks with some investors, Iowa Attorney General Tom Miller said. All 50 U.S. states are investigating whether banks and loan servicers used false documents and signatures to justify hundreds of thousands of foreclosures. The probe, announced Oct. 13, came after JPMorgan Chase & Co. and Ally Financial Inc.’s GMAC mortgage unit said they would stop repossessions in 23 states where courts supervise home seizures and Bank of America Corp., the largest U.S. lender, froze foreclosures nationwide.