Capital One misled customers about their savings account interest rates, "cheating" them out of over $2 billion in interest, the Consumer Financial Protection Bureau alleged in a Tuesday lawsuit. Why it matters: The agency alleged that millions of customers are affected.

A U.S. watchdog is suing Capital One for allegedly misleading consumers about its offerings for high-interest savings accounts — and "cheating" customers out of more than $2 billion in lost interest payments as a result.