Stock market today: S&P 500, Nasdaq, Dow slide to end 2025 as traders reset for 2026
The S&P 500 closed down 0.74% on New Year’s Eve, but ended 2025 up 16.39%. The Nasdaq gained 20.36% for the year, while the Dow rose 12.97%. Nvidia surged 39% in 2025 to become the first $5 trillion company. U.S. markets close Thursday for the holiday.