Jamie Dimon, ceo of JPMorgan Chase, says the largest lenders in the U.S. would unintentionally benefit the most from an exemption of rule under the Dodd-Frank Act requiring banks to retain 5% of the loans they securitize. The Federal Deposit Insurance Corp., Office of the Comptroller of the Currency and four other federal agencies have drafted rules that would exempt loans in which borrowers make at least a 20% down payment.