Underfolio

Every trading day › 2025

The stock market on December 16, 2025

December 16, 2025, a Tuesday. The S&P 500 fell 0.24% to close at 6800.26. Of 3,526 US stocks that traded, 1,421 rose and 1,992 fell.

The S&P 500-0.24%closed at 6800.26
How big a move#18,018of 24,799 trading days since 1928
$100 in the index since$113price only, to September 24, 2026
Stocks that rose1,421of 3,526; 1,992 fell
Biggest companyNvidiaby market value that day

Biggest rises among the 500 largest companies

Affirm Holdings (AFRM)+11.8%
Talen Energy Corp (TLN)+5.3%
United Continental Holdings (UAL)+4.4%

Biggest falls among the 500 largest companies

Phillips 66 (PSX)-6.9%
Humana (HUM)-6.0%
Lumentum Holdings Inc (LITE)-5.5%

Stock moves count dividends; the index is price only. Market values after 2024 are estimates.

‹ December 15, 2025 · Every December 16 · December 17, 2025 ›

Ask the Lab what came after a day like this

History, not advice. How these numbers are made.