A top bank executive delivered some bad news at a conference.JPMorgan Chase's (JPM +0.38%) has been enjoying a solid 2025, with the share price up an impressive 31% this year through Monday of this week (Dec. 8). But on Tuesday, the bank's shares tumbled almost 4%, a steep drop in just one trading day.The plunge was the result of remarks made by Marianne Lake, JPMorgan's CEO of Consumer & Community Banking and a member of the bank's Operating Committee, at a financial services conference hosted by rival Gol ...