JPMorgan Chase and BNY Mellon have restricted electronic information sharing with the Office of the Comptroller of the Currency (OCC) following a cyberattack that compromised over 100 email addresses. The OCC disclosed the breach earlier this month, prompting concerns among major U.S. banks regarding the security of sensitive financial information. This decision reflects a growing apprehension about potential security risks to their computer networks as the fallout from the OCC's email hack continues to unfold.