Underfolio

Every trading day › 1979

The stock market on August 23, 1979

August 23, 1979, a Thursday. The S&P 500 fell 0.33% to close at 108.63. Of 4,512 US stocks that traded, 1,211 rose and 1,272 fell.

The S&P 500-0.33%closed at 108.63
How big a move#15,839of 24,799 trading days since 1928
$100 in the index since$7,092price only, to September 24, 2026
Stocks that rose1,211of 4,512; 1,272 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)+7.0%
Olin (OLN)+4.9%
Mgic Investment Corp (MGI)+4.8%

Biggest falls among the 500 largest companies

Dome Petroleum Ltd (DMP)-6.4%
Pennzoil (PZE)-5.5%
McDonnell Douglas (MD)-4.3%

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

‹ August 22, 1979 · Every August 23 · August 24, 1979 ›

Ask the Lab what came after a day like this

History, not advice. How these numbers are made.