JPMorgan Chase & Co bears the highest potential hazard to the financial system if it were to fail, a staff study released by a U.S. government research agency showed, providing a first-of-its-kind numerical risk ranking of U.S. banks. The bank had a “systemic risk score” of 5.05 percent for 2013 in a group of 33 large U.S. bank holding companies, the study by staffers at the Treasury Department’s Office of Financial Research (OFR) said. The scores are based on metrics such as size, interconnectedness, complexity and cross-border activities, OFR said.