Capital One (NYSE: COF) will be reporting earnings this Thursday, and in this video, Motley Fool financial analyst Matt Koppenheffer tells us what to watch for. With banking fees being less of a revenue driver for Capital One, the income it makes on its interest is going to be the most important number to watch. And while its interest margin is wider than most, it's still being influenced by the interest margin squeeze affecting the entire sector. 

Fool contributor Matt Koppenheffer has no position in any stocks mentioned, and neither does The Motley Fool. Try any of our Foolish newsletter services free for 30 days. We Fools may not all hold the same opinions, but we all believe that considering a diverse range of insights makes us better investors. The Motley Fool has a disclosure policy.