The stock market on August 20, 1987
August 20, 1987, a Thursday. The S&P 500 rose 1.52% to close at 334.84. Of 6,326 US stocks that traded, 2,701 rose and 1,400 fell.
The S&P 500+1.52%closed at 334.84
How big a move#3,010of 24,799 trading days since 1928
$100 in the index since$2,301price only, to September 24, 2026
Stocks that rose2,701of 6,326; 1,400 fell
Biggest companyInternational Business Machines Corporationby market value that day
Biggest rises among the 500 largest companies
| Viacom Inc (VIA) | +8.6% |
| Mca Inc. (MCA) | +6.8% |
Biggest falls among the 500 largest companies
| Mallinckrodt (MKG) | -4.3% |
| Newmont Mining (NEM) | -4.1% |
| Seagate Technology (SEG) | -2.9% |
Stock moves count dividends; the index is price only. Market values after 2024 are estimates.
‹ August 19, 1987 · Every August 20 · August 21, 1987 ›
Ask the Lab what came after a day like thisHistory, not advice. How these numbers are made.