Wells Fargo is up more than 15% this year — and a big catalyst is still on the horizon

Spencer Platt | Getty Images News | Getty Images

Wells Fargo shares jumped over the past year as the once-embattled bank continued to clear the regulatory hurdles put in place after the phony accounts scandal of 2016.

But one more milestone is still on the horizon, one that could move the stock even higher: lifting the Federal Reserve's $1.95 trillion asset cap.