Underfolio

Every trading day › 2025

The stock market on September 9, 2025

September 9, 2025, a Tuesday. The S&P 500 rose 0.27% to close at 6512.61. Of 3,532 US stocks that traded, 1,296 rose and 2,131 fell.

The S&P 500+0.27%closed at 6512.61
How big a move#17,237of 24,799 trading days since 1928
$100 in the index since$118price only, to September 24, 2026
Stocks that rose1,296of 3,532; 2,131 fell
Biggest companyNvidiaby market value that day

Biggest rises among the 500 largest companies

UnitedHealth Group (UNH)+8.6%
Centene Corporation (CNC)+7.7%
Supermicro (SMCI)+7.2%

Biggest falls among the 500 largest companies

Humana (HUM)-12.0%
21st Century Fox (FOX)-6.7%
21st Century Fox (FOXA)-6.2%

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

‹ September 8, 2025 · Every September 9 · September 10, 2025 ›

Ask the Lab what came after a day like this

History, not advice. How these numbers are made.