Capital One Financial's (NYSE:COF) turned in mixed credit card metrics in June, according to an 8-K filing on Tuesday. Capital One's card delinquency rate rose to 3.92% in June from 3.85% in May. That ...

If you have both a miles-earning Capital One card and a cash-back Capital One card, you can combine your rewards to make them even more valuable. Here's how to do it.