Wall Street Leaderless in Rules Fight as Dimon Diminished

Wall Street, the global financial community reeling from public outrage and increased regulation, is proving incapable of finding a champion to replace sidelined JPMorgan Chase & Co. Chief Executive Officer Jamie Dimon.

Dimon, 56, one of the industry’s most forceful advocates, has lost stature as his bank, the largest in the U.S. by assets, juggles multiple investigations and a $5.8 billion trading loss on wrong-way bets on credit derivatives. His peers at other big lenders are hobbled by poor performance, tarnished reputations or a reluctance to step into the breach.