1. JPMorgan expects 2024 expenses to rise to $105 billion, exceeding estimates. 2. Marianne Lake cites inflation and growth-related costs as key factors for the increase. 3. JPMorgan shares fell 4% following the expense guidance announcement. 4. Investment banking fees may rise in low single digits; trading revenue could see higher growth. 5. Lake warns of a fragile economic environment with limited capacity for stress.