Key TakeawaysThe S&P 500 ended 0.2% higher on Monday, Jan. 13, 2025, ahead of this week's inflation data and the first wave of earnings reports from the nation's biggest banks.Moderna shares plummeted after the biotech firm slashed its 2025 revenue guidance, citing uncertain vaccine demand.Shares of managed care companies moved higher following the U.S. government's proposal to raise Medicare Advantage reimbursement rates next year. Major U.S. equities indexes were mixed to start a new trading week ahead of ...