The stock market on May 12, 1980
May 12, 1980, a Monday. The S&P 500 rose 0.06% to close at 104.78. Of 4,536 US stocks that traded, 1,143 rose and 1,262 fell.
The S&P 500+0.06%closed at 104.78
How big a move#23,158of 24,799 trading days since 1928
$100 in the index since$7,353price only, to September 24, 2026
Stocks that rose1,143of 4,536; 1,262 fell
Biggest companyAT&T Corporationby market value that day
Last day of trading for2stocks
Biggest rises among the 500 largest companies
| Diamond International (DN) | +17.2% |
| Molson Coors Brewing (RKY) | +9.2% |
| Iu International Corp (IU) | +8.6% |
Biggest falls among the 500 largest companies
| Placer Dome Inc (PDG) | -7.9% |
| Pillsbury Co | -7.3% |
| Koppers (KOP) | -5.7% |
Stock moves count dividends; the index is price only. Market values after 2024 are estimates.
‹ May 9, 1980 · Every May 12 · May 13, 1980 ›
Ask the Lab what came after a day like thisHistory, not advice. How these numbers are made.