The stock market on April 21, 1980
April 21, 1980, a Monday. The S&P 500 fell 0.75% to close at 99.80. Of 4,529 US stocks that traded, 593 rose and 1,939 fell.
The S&P 500-0.75%closed at 99.80
How big a move#8,692of 24,799 trading days since 1928
$100 in the index since$7,720price only, to September 24, 2026
Stocks that rose593of 4,529; 1,939 fell
Biggest companyAT&T Corporationby market value that day
Biggest rises among the 500 largest companies
| Placer Dome Inc (PDG) | +4.4% |
| Mobil Corporation (MOB) | +4.3% |
| Ameren (AEE) | +3.3% |
Biggest falls among the 500 largest companies
| Armco Inc (AS.) | -7.9% |
| Freeport-McMoran (FTX) | -7.8% |
Stock moves count dividends; the index is price only. Market values after 2024 are estimates.
‹ April 18, 1980 · Every April 21 · April 22, 1980 ›
Ask the Lab what came after a day like thisHistory, not advice. How these numbers are made.