Now that the largest six U.S. banks have reported their fourth-quarter results, it is clear that investors are continuing to celebrate the group’s performance. And although the banks have varying business models,

JPMorgan Chase reported fourth-quarter results Wednesday that came in above analysts' expectations as investment banking fees rose.

Big bank profits surged in the fourth quarter and Wall Street roared back to life, with net income rising 50% at JPMorgan Chase and more than doubling at Goldman Sachs.