Banks will need to prove in their quarterly results that they've justified their stocks' massive post-election gains.
"The market has rewarded the stocks very well in the fourth quarter," said Ken Leon, senior equity analyst at CFRA Research. "The question is, can they really catch up with the euphoria of having a Trump administration?"
The fourth-quarter reporting season kicks off in earnest Friday with results from BlackRock, Bank of America, JPMorgan Chase, Wells Fargo and PNC Financial. Morgan Stanley, Citigroup and Goldman Sachs report early next week after Monday's Martin Luther King Jr. holiday.