The stock market on September 21, 1984
September 21, 1984, a Friday. The S&P 500 fell 1.07% to close at 165.67. Of 5,786 US stocks that traded, 1,571 rose and 1,671 fell.
The S&P 500-1.07%closed at 165.67
How big a move#5,433of 24,799 trading days since 1928
$100 in the index since$4,650price only, to September 24, 2026
Stocks that rose1,571of 5,786; 1,671 fell
Biggest companyInternational Business Machines Corporationby market value that day
Last day of trading for3stocks
Biggest rises among the 500 largest companies
| Northwest Industries (NWT) | +21.4% |
| Sonat Inc. (SNT) | +7.5% |
| Homestake Mining (HM) | +5.3% |
Biggest falls among the 500 largest companies
| Northrop Grumman (NOC) | -8.0% |
| FedEx (FDX) | -7.9% |
| CVS Health (CVS) | -6.4% |
Stock moves count dividends; the index is price only. Market values after 2024 are estimates.
‹ September 20, 1984 · Every September 21 · September 24, 1984 ›
Ask the Lab what came after a day like thisHistory, not advice. How these numbers are made.