We are now officially in earnings season, and some of the biggest names in banking are about to report. In this video, Motley Fool financial analyst Matt Koppenheffer discusses what we will probably see coming from these reports based on some of the information in Wells Fargo's (WFC 3.08%) report last week, including shrinking net interest margins that are most likely industrywide. Matt tells us to watch to see how other banks plan to deal with these shrinking margins, and to see if they are experiencing the same slowing in their mortgage pipeline that WFC is. Matt also gives us a preview of how the markets may react to these earnings reports.