A new bill in Congress threatens to make life hard for the nation's big banks. With JPMorgan (JPM 0.03%), Bank of America (BAC -0.27%), Wells Fargo (WFC -0.46%), and Citigroup (C 0.78%) all clocking in with assets over $400 billion, the new law would hit them hardest where it counts -- capital reserves.

In the video below, Motley Fool contributor Jessica Alling discusses the proposed legislature, how it would effect the banks, and what investors should look out for.