The stock market on October 18, 2021
October 18, 2021, a Monday. The S&P 500 rose 0.34% to close at 4486.46. Of 4,366 US stocks that traded, 1,942 rose and 2,258 fell.
The S&P 500+0.34%closed at 4486.46
How big a move#15,665of 24,799 trading days since 1928
$100 in the index since$172price only, to September 24, 2026
Stocks that rose1,942of 4,366; 2,258 fell
Biggest companyAppleby market value that day
Last day of trading for1stock
Biggest rises among the 500 largest companies
| Cloudflare, Inc. (NET) | +7.8% |
| Sofi Tech (SOFI) | +7.6% |
| Affirm Holdings (AFRM) | +7.2% |
Biggest falls among the 500 largest companies
| Zillow Group, Inc. - Class C Capital Stock (Z) | -9.4% |
| NetApp (NTAP) | -4.3% |
| Biogen (BIIB) | -4.1% |
Stock moves count dividends; the index is price only. Market values after 2024 are estimates.
‹ October 15, 2021 · Every October 18 · October 19, 2021 ›
Ask the Lab what came after a day like thisHistory, not advice. How these numbers are made.