The stock market on October 9, 1984
October 9, 1984, a Tuesday. The S&P 500 fell 0.28% to close at 161.67. Of 5,753 US stocks that traded, 1,355 rose and 1,710 fell.
The S&P 500-0.28%closed at 161.67
How big a move#16,914of 24,799 trading days since 1928
$100 in the index since$4,765price only, to September 24, 2026
Stocks that rose1,355of 5,753; 1,710 fell
Biggest companyInternational Business Machines Corporationby market value that day
Biggest rises among the 500 largest companies
| Pioneer Corp-Texas (PNA) | +4.9% |
| KeySpan (KSE) | +4.4% |
| First Chicago Corp (FNB.) | +3.7% |
Biggest falls among the 500 largest companies
| Homestake Mining (HM) | -5.7% |
| Motorola Solutions (MOT) | -4.2% |
| Ceridian Corp (CEN) | -4.1% |
Stock moves count dividends; the index is price only. Market values after 2024 are estimates.
‹ October 8, 1984 · Every October 9 · October 10, 1984 ›
Ask the Lab what came after a day like thisHistory, not advice. How these numbers are made.