Citigroup

MasterCard and Visa said Friday that they had notified issuers of its credit cards of a potential breach of the security of customer accounts. Visa blamed a third company for the error.

Mobile banking lets consumers easily manage their financial lives from anywhere, anytime, but plenty of people are a little wary about giving it a shot. Let DailyFinance help: Here's our primer on the mobile banking basics.

Wall Street's bad bonus year did not extend to Citigroup's c-suite. CEO Vikram Pandit, who said he'd take a salary of $1 until Citi returned to profitability, pulled in nearly $14.9 million this year, and his fellow top officers took home big raises too.

Aftershocks from the financial crisis are still hitting U.S. banks: They're getting sued over everything from bonds stuffed with fraudulent home loans to improper foreclosures to credit card fees. Here are the five banks with the most to lose from those lawsuits.

Impressed by the speed and accuracy with which Watson churned out answers (or rather, "questions") in its winning performance in the Jeopardy! Challenge last year? Citigroup was, too -- so much so that it has hired the supercomputer to assist its human financial professionals.

A surge in earnings by the biggest banks at the end of last year made 2011 the most profitable time for the industry in five years. More earnings and fewer troubled banks suggest the industry has healed since the 2008 financial crisis.

Tens of millions of Americans take to the Web regularly to do our most important financial business. As we do, the company Corporate Insight is tracking which institutions are offering customers the best new online innovations. Here's what CI found: