The stock market on September 18, 2025
September 18, 2025, a Thursday. The S&P 500 rose 0.48% to close at 6631.96. Of 3,532 US stocks that traded, 2,755 rose and 698 fell.
The S&P 500+0.48%closed at 6631.96
How big a move#12,818of 24,799 trading days since 1928
$100 in the index since$116price only, to September 24, 2026
Stocks that rose2,755of 3,532; 698 fell
Biggest companyNvidiaby market value that day
Biggest rises among the 500 largest companies
| Intel (INTC) | +22.8% |
| Synopsys (SNPS) | +12.9% |
| Oklo Inc. (OKLO) | +10.2% |
Biggest falls among the 500 largest companies
| Darden Restaurants (DRI) | -7.7% |
| Nucor (NUE) | -5.9% |
| Moody's Corp (MCO) | -5.8% |
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.