The stock market on September 8, 1980
September 8, 1980, a Monday. The S&P 500 fell 1.26% to close at 123.31. Of 4,585 US stocks that traded, 999 rose and 2,036 fell.
The S&P 500-1.26%closed at 123.31
How big a move#4,232of 24,799 trading days since 1928
$100 in the index since$6,248price only, to September 24, 2026
Stocks that rose999of 4,585; 2,036 fell
Biggest companyAT&T Corporationby market value that day
Last day of trading for3stocks
Biggest rises among the 500 largest companies
| Kennecott (KN) | +11.6% |
| Homestake Mining (HM) | +10.4% |
| Fina Inc -cl A (FI) | +9.4% |
Biggest falls among the 500 largest companies
| Data General Corp (DGN.) | -13.9% |
| National Semiconductor (NSM) | -5.6% |
| Harbinger Group Inc (HRG) | -5.3% |
Stock moves count dividends; the index is price only. Market values after 2024 are estimates.
‹ September 5, 1980 · Every September 8 · September 9, 1980 ›
Ask the Lab what came after a day like thisHistory, not advice. How these numbers are made.