JPMorgan Chase (NYSE:JPM) is home to the famous "fortress balance sheet," right? 

It's that balance sheet that powered JPMorgan through the financial crisis, gobbling up assets and market share while the competition was backed into a corner, fighting for survival. CEO Jamie Dimon has been preaching this philosophy for years.

But today, six years later, Citigroup (NYSE:C) may be beating Jamie Dimon at his own game. In the video below, Motley Fool contributor Jay Jenkins argues just that, and he's got the numbers to back it up.