Market Movers Today: Amentum Holdings, Humana, Nvidia, Tesla, and More

Amentum Holdings (AMTM) saw the steepest decline in the S&P 500 after company executives stated in their earnings call that they expect fiscal 2025 growth to be impacted by a reduction in certain government programs.
Shares of health insurers such as Humana (HUM) and UnitedHealth Group (UNH) took a hit after President-elect Donald Trump expressed plans to eliminate the "middle man" in health insurance.
Nvidia (NVDA) continued its downward trend, with shares falling further after the semiconductor company's stock entered correction territory.
Pfizer (PFE) saw its stock rise after providing 2025 guidance that met analysts' expectations, despite anticipating a $1 billion hit due to changes in the Medicare Part D prescription drug program.
Tesla (TSLA) shares surged to another record high following an upgrade from Mizuho, which, along with other analysts, predicted that the electric vehicle maker would benefit from the policies of the incoming Trump administration.
SolarEdge Technologies (SEDG) experienced a significant jump in its stock price after a double upgrade from Goldman Sachs, which forecast a turnaround for the solar power company in 2025.
Oil and gold futures dropped, while the yield on the 10-year Treasury note also declined. The U.S. dollar strengthened against the euro but weakened against the pound and yen. Bitcoin, although down from its record high of $108,000, remained higher overall.