The stock market on September 27, 1984
September 27, 1984, a Thursday. The S&P 500 rose 0.41% to close at 166.96. Of 5,764 US stocks that traded, 1,653 rose and 1,387 fell.
The S&P 500+0.41%closed at 166.96
How big a move#14,165of 24,799 trading days since 1928
$100 in the index since$4,614price only, to September 24, 2026
Stocks that rose1,653of 5,764; 1,387 fell
Biggest companyInternational Business Machines Corporationby market value that day
Last day of trading for1stock
Biggest rises among the 500 largest companies
| Searle G D & (SRL) | +11.2% |
| Ceridian Corp (CEN) | +6.6% |
| MCI Communications (MCIC.) | +5.2% |
Biggest falls among the 500 largest companies
| Times Mirror Co -ser A (TMC) | -4.2% |
| Apollo Computer Inc (APCI.) | -4.0% |
| Transitional Hospitals Cp (THY) | -3.7% |
Stock moves count dividends; the index is price only. Market values after 2024 are estimates.
‹ September 26, 1984 · Every September 27 · September 28, 1984 ›
Ask the Lab what came after a day like thisHistory, not advice. How these numbers are made.