The stock market on August 31, 1984
August 31, 1984, a Friday. The S&P 500 rose 0.05% to close at 166.68. Of 5,798 US stocks that traded, 1,692 rose and 1,327 fell.
The S&P 500+0.05%closed at 166.68
How big a move#23,371of 24,799 trading days since 1928
$100 in the index since$4,622price only, to September 24, 2026
Stocks that rose1,692of 5,798; 1,327 fell
Biggest companyInternational Business Machines Corporationby market value that day
Last day of trading for10stocks
Biggest rises among the 500 largest companies
| KeySpan (KSE) | +6.7% |
| Dow Jones (DJ) | +5.1% |
| Household International (HI) | +4.7% |
Biggest falls among the 500 largest companies
| Noble Energy (NBL) | -3.6% |
| Amerada Hess (AHC) | -3.4% |
| Louisiana Land & Exploration (LLX.) | -3.4% |
Stock moves count dividends; the index is price only. Market values after 2024 are estimates.
‹ August 30, 1984 · Every August 31 · September 4, 1984 ›
Ask the Lab what came after a day like thisHistory, not advice. How these numbers are made.