JP Morgan Chase, the largest bank of the US in terms of assets, acknowledged a massive data breach that affected 76 million households and 7 million small businesses. The bank disclosed the extent of the breach in a filing in early October with the Securities and Exchange Commission. The bank reported no unusual customer fraud had resulted from this breach. Hackers obtained personal information such as customer names, addresses, phone numbers and email addresses. However, JP Morgan Chase said that sensitive bank information–account numbers, passwords, social security numbers and birthdates–were not part of the breach. The breach occurred in June and July, and affected customers that used Chase web and mobile services.