The stock market on October 20, 2021
October 20, 2021, a Wednesday. The S&P 500 rose 0.37% to close at 4536.19. Of 4,367 US stocks that traded, 2,590 rose and 1,572 fell.
The S&P 500+0.37%closed at 4536.19
How big a move#15,069of 24,799 trading days since 1928
$100 in the index since$170price only, to September 24, 2026
Stocks that rose2,590of 4,367; 1,572 fell
Biggest companyAppleby market value that day
Last day of trading for1stock
Biggest rises among the 500 largest companies
| Pinterest, Inc. (PINS) | +12.8% |
| Anthem (ANTM) | +7.7% |
| M&T Bank Corp. (MTB) | +5.8% |
Biggest falls among the 500 largest companies
| Ginkgo Bioworks (DNA) | -7.0% |
| Baker Hughes (BKR) | -5.7% |
| Affirm Holdings (AFRM) | -5.0% |
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.