The stock market on March 18, 2026
March 18, 2026, a Wednesday. The S&P 500 fell 1.36% to close at 6624.70. Of 3,455 US stocks that traded, 639 rose and 2,732 fell.
The S&P 500-1.36%closed at 6624.70
How big a move#3,718of 24,799 trading days since 1928
$100 in the index since$116price only, to September 24, 2026
Stocks that rose639of 3,455; 2,732 fell
Biggest companyNvidiaby market value that day
Biggest rises among the 500 largest companies
| Lumentum Holdings Inc (LITE) | +7.9% |
| Cloudflare Inc (NET) | +6.6% |
| Cheniere Energy Inc (LNG) | +5.9% |
Biggest falls among the 500 largest companies
| Rocket Lab USA (RKLB) | -11.6% |
| Otis Worldwide (OTIS) | -6.7% |
| Affirm Holdings (AFRM) | -6.6% |
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.