NEW YORK--(BUSINESS WIRE)--Now that the Fed has maintained its near-zero target rate, most U.S. banks will remain very attentive to their cost structures given the expectation of flat to lower asset yields going forward, says Fitch Ratings. Moreover, Fitch expects many highly asset-sensitive banks to trim their asset sensitivity in order to potentially protect net interest income from further downward pressure. With the Fed's decision yesterday to maintain a target range of 0% to 0.25%, we beli