S&P 500 Gains and Losses Today: Tesla Stock Boosted by AI, Self-Driving Optimism

Key TakeawaysThe S&P 500 added 0.4% on Monday, Dec. 16, as tech stocks edged higher ahead of this week's Federal Reserve interest-rate announcement.Broadcom's shares built on last week's momentum after Wedbush analysts tapped the stock as a top semiconductor pick.Super Micro Computer shares fell following the stock's removal from the Nasdaq 100 and reports that the server maker could be planning to raise capital. Major U.S. equities indexes were mixed to launch the trading week ahead of Wednesday's key Fede ...