George Bailey ran his family’s co-op savings and loan. not a for-profit run bank.
the town ‘bank’ (and the town) was ‘run’ by the evil Mr. Potter, the proxy for corrupt and greedy big money and ‘new deal,’ big gov’t in the story.
and actually i think it was called the Bailey Bros. Building and Loan.
Which makes the “Lost Ending” of It’s a Wonderful Life even more satisfying.
https://www.youtube.com/watch?v=vw89o0afb2A