The stock market on September 18, 1984
September 18, 1984, a Tuesday. The S&P 500 fell 0.72% to close at 167.65. Of 5,792 US stocks that traded, 1,329 rose and 1,898 fell.
The S&P 500-0.72%closed at 167.65
How big a move#8,985of 24,799 trading days since 1928
$100 in the index since$4,595price only, to September 24, 2026
Stocks that rose1,329of 5,792; 1,898 fell
Biggest companyInternational Business Machines Corporationby market value that day
Last day of trading for4stocks
Biggest rises among the 500 largest companies
| KeySpan (KSE) | +6.1% |
| Ltv Corp (LTVCQ) | +4.5% |
| Northrop Grumman (NOC) | +4.4% |
Biggest falls among the 500 largest companies
| Unisys (UIS) | -6.4% |
| Humana (HUM) | -6.3% |
| Ncr Corp. (NCR) | -6.0% |
Stock moves count dividends; the index is price only. Market values after 2024 are estimates.
‹ September 17, 1984 · Every September 18 · September 19, 1984 ›
Ask the Lab what came after a day like thisHistory, not advice. How these numbers are made.