After we saw Wells Fargo (WFC 1.13%) report last week, it gave investors some key metrics to watch as the other banks begin reporting their earnings. The net interest margin is going to be a big number to watch with Bank of America (BAC 1.40%) as we saw Wells Fargo's compressing, a trend that may be industrywide at the moment. In this video, Motley Fool financial analyst Matt Koppenheffer also tells us how important the mortgage pipeline is going to be to watch, and how we'll need to keep an eye on anything at BAC concerning lawsuits after its big settlement with Fannie Mae.