The stock market on October 12, 1984
October 12, 1984, a Friday. The S&P 500 rose 0.86% to close at 164.18. Of 5,756 US stocks that traded, 1,999 rose and 1,096 fell.
The S&P 500+0.86%closed at 164.18
How big a move#7,343of 24,799 trading days since 1928
$100 in the index since$4,692price only, to September 24, 2026
Stocks that rose1,999of 5,756; 1,096 fell
Biggest companyInternational Business Machines Corporationby market value that day
Last day of trading for2stocks
Biggest rises among the 500 largest companies
| KeySpan (KSE) | +8.5% |
| Noram Energy Corp | +5.4% |
| Mesa Inc (MXP.) | +5.3% |
Biggest falls among the 500 largest companies
| Apple (AAPL) | -4.2% |
| Kimberly-Clark (KMB) | -2.8% |
| Gould Inc (GLD) | -2.6% |
Stock moves count dividends; the index is price only. Market values after 2024 are estimates.
‹ October 11, 1984 · Every October 12 · October 15, 1984 ›
Ask the Lab what came after a day like thisHistory, not advice. How these numbers are made.