Changes to Basel III "endgame" rules could remove an overhang from this bank stock. Regulators have been working on proposed bank changes, called Basel III endgame, which they argue would help strengthen the financial system by requiring banks to hold more capital on their balance sheets. Banks pushed back against these rules, arguing they are well capitalized, and further capital requirements could limit them and their ability to lend to their customers. U.S. Bancorp (USB -0.44%) was one bank facing big qu ...