On the first trading day of 2025, U.S. stocks faced notable volatility, with the S&P 500 down 0.2% and the Dow falling nearly half a percent amid investor uncertainty over changing political dynamics. Tesla shares plummeted over 6% due to underwhelming delivery numbers and a Cybertruck incident, while defensive sectors posted slight gains as markets grappled with rising yields and potential interest rate changes. Source and details of the news