The stock market on September 17, 1984
September 17, 1984, a Monday. The S&P 500 rose 0.05% to close at 168.87. Of 5,791 US stocks that traded, 1,579 rose and 1,616 fell.
The S&P 500+0.05%closed at 168.87
How big a move#23,260of 24,799 trading days since 1928
$100 in the index since$4,562price only, to September 24, 2026
Stocks that rose1,579of 5,791; 1,616 fell
Biggest companyInternational Business Machines Corporationby market value that day
Last day of trading for2stocks
Biggest rises among the 500 largest companies
| Louisiana-Pacific (LPX) | +6.5% |
| First Republicbank Corp | +5.2% |
| Deluxe Corporation (DLX) | +4.1% |
Biggest falls among the 500 largest companies
| Dow Jones (DJ) | -8.8% |
| MCI Communications (MCIC.) | -8.3% |
| Ceridian Corp (CEN) | -7.4% |
Stock moves count dividends; the index is price only. Market values after 2024 are estimates.
‹ September 14, 1984 · Every September 17 · September 18, 1984 ›
Ask the Lab what came after a day like thisHistory, not advice. How these numbers are made.