The stock market on September 5, 1984
September 5, 1984, a Wednesday. The S&P 500 fell 0.36% to close at 164.29. Of 5,790 US stocks that traded, 1,275 rose and 1,947 fell.
The S&P 500-0.36%closed at 164.29
How big a move#15,232of 24,799 trading days since 1928
$100 in the index since$4,689price only, to September 24, 2026
Stocks that rose1,275of 5,790; 1,947 fell
Biggest companyInternational Business Machines Corporationby market value that day
Last day of trading for3stocks
Biggest rises among the 500 largest companies
| KeySpan (KSE) | +10.4% |
| American Broadcasting (ABC) | +8.7% |
| Owens-Illinois (OI) | +6.4% |
Biggest falls among the 500 largest companies
| Materion Corporation (MTRN) | -5.1% |
| Big Three Industries | -4.4% |
| American Airlines Group (AMR) | -4.2% |
Stock moves count dividends; the index is price only. Market values after 2024 are estimates.
‹ September 4, 1984 · Every September 5 · September 6, 1984 ›
Ask the Lab what came after a day like thisHistory, not advice. How these numbers are made.