In a remarkable financial showing, JPMorgan Chase has posted its biggest-ever annual profit, driven by surging revenues in investment banking and robust trading activities. The bank reported a 50% increase in net income for the fourth quarter, exceeding estimates with profits surpassing $14 billion. Analysts noted the significant impact of strong consumer spending and a rebound in dealmaking, as Jamie Dimon highlighted potential economic threats amid these record figures. The momentum is echoed across major U.S. banks, with Goldman Sachs and others also reporting substantial gains, marking a successful end to the fiscal period as they navigate post-election volatility.