The stock market on September 19, 2025
September 19, 2025, a Friday. The S&P 500 rose 0.49% to close at 6664.36. Of 3,532 US stocks that traded, 1,007 rose and 2,445 fell.
The S&P 500+0.49%closed at 6664.36
How big a move#12,648of 24,799 trading days since 1928
$100 in the index since$116price only, to September 24, 2026
Stocks that rose1,007of 3,532; 2,445 fell
Biggest companyNvidiaby market value that day
Biggest rises among the 500 largest companies
| Oklo Inc. (OKLO) | +28.8% |
| Joby Aviation (JOBY) | +13.3% |
| Paramount Global (PARA) | +5.8% |
Biggest falls among the 500 largest companies
| Dexcom (DXCM) | -11.0% |
| Cognizant (CTSH) | -4.7% |
| Humana (HUM) | -4.6% |
Stock moves count dividends; the index is price only. Market values after 2024 are estimates.
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Ask the Lab what came after a day like thisHistory, not advice. How these numbers are made.