Regional lender PNC Financial (NYSE:PNC) reports earnings on Jan. 17. In the following video, Motley Fool contributing writer John Maxfield discusses the four most important metrics investors should watch for when it does.  

John Maxfield owns shares of Bank of America. The Motley Fool recommends Wells Fargo and owns shares of Bank of America, Citigroup, JPMorgan Chase, PNC Financial Services, and Wells Fargo. Try any of our Foolish newsletter services free for 30 days. We Fools don't 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.