The stock market on September 17, 2026
September 17, 2026, a Thursday. The S&P 500 rose 1.14% to close at 7637.76. Of 3,326 US stocks that traded, 1,909 rose and 1,311 fell.
The S&P 500+1.14%closed at 7637.76
How big a move#4,931of 24,799 trading days since 1928
$100 in the index since$101price only, to September 24, 2026
Stocks that rose1,909of 3,326; 1,311 fell
Biggest companyNvidiaby market value that day
Biggest rises among the 500 largest companies
| Generac (GNRC) | +18.3% |
| Tempus AI, Inc. (TEM) | +14.8% |
| Supermicro (SMCI) | +9.5% |
Biggest falls among the 500 largest companies
| Mastec Inc (MTZ) | -7.9% |
| T-Mobile US (TMUS) | -5.6% |
| DaVita (DVA) | -5.6% |
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.