Underfolio

Every trading day › 1984

The stock market on September 6, 1984

September 6, 1984, a Thursday. The S&P 500 rose 0.83% to close at 165.65. Of 5,787 US stocks that traded, 2,021 rose and 1,197 fell.

The S&P 500+0.83%closed at 165.65
How big a move#7,713of 24,799 trading days since 1928
$100 in the index since$4,651price only, to September 24, 2026
Stocks that rose2,021of 5,787; 1,197 fell
Biggest companyInternational Business Machines Corporationby market value that day
Last day of trading for1stock

Biggest rises among the 500 largest companies

Stanley Black & Decker (SWK)+8.4%
Fannie Mae (FNMA)+6.9%
Micron Technology (MU)+6.1%

Biggest falls among the 500 largest companies

Entergy (ETR)-10.9%
Gould Inc (GLD)-8.6%
City Investing Co (CNV)-4.0%

Stock moves count dividends; the index is price only. Market values after 2024 are estimates.

‹ September 5, 1984 · Every September 6 · September 7, 1984 ›

Ask the Lab what came after a day like this

History, not advice. How these numbers are made.