The stock market on October 21, 1985
October 21, 1985, a Monday. The S&P 500 fell 0.04% to close at 186.96. Of 5,728 US stocks that traded, 1,519 rose and 1,992 fell.
The S&P 500-0.04%closed at 186.96
How big a move#23,514of 24,799 trading days since 1928
$100 in the index since$4,121price only, to September 24, 2026
Stocks that rose1,519of 5,728; 1,992 fell
Biggest companyInternational Business Machines Corporationby market value that day
Last day of trading for1stock
Biggest rises among the 500 largest companies
| Macy (R H) & Co | +34.2% |
| Southland Royalty Co (SRO) | +14.1% |
| BP p.l.c. (BP) | +6.3% |
Biggest falls among the 500 largest companies
| Wendy's International Inc (WEN) | -7.6% |
| Viacomcbs Inc (VIAC) | -6.2% |
| Shared Medical Systems (SMS) | -5.5% |
Stock moves count dividends; the index is price only. Market values after 2024 are estimates.
‹ October 18, 1985 · Every October 21 · October 22, 1985 ›
Ask the Lab what came after a day like thisHistory, not advice. How these numbers are made.