Underfolio

Every trading day › 1979

The stock market on September 27, 1979

September 27, 1979, a Thursday. The S&P 500 rose 0.23% to close at 110.21. Of 4,503 US stocks that traded, 1,130 rose and 1,183 fell.

The S&P 500+0.23%closed at 110.21
How big a move#18,317of 24,799 trading days since 1928
$100 in the index since$6,990price only, to September 24, 2026
Stocks that rose1,130of 4,503; 1,183 fell
Biggest companyInternational Business Machines Corporationby market value that day
Last day of trading for1stock

Biggest rises among the 500 largest companies

Ocean Drilling & Exploration (ODR)+9.8%
Pan Am Corp+9.3%
Asarco Inc (AR)+8.3%

Biggest falls among the 500 largest companies

Olin (OLN)-5.4%
Molson Coors Brewing (RKY)-5.1%
Armco Inc (AS.)-5.1%

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

‹ September 26, 1979 · Every September 27 · September 28, 1979 ›

Ask the Lab what came after a day like this

History, not advice. How these numbers are made.