Underfolio

Every trading day › 1977

The stock market on August 31, 1977

August 31, 1977, a Wednesday. The S&P 500 rose 0.40% to close at 96.77. Of 4,652 US stocks that traded, 1,048 rose and 1,208 fell.

The S&P 500+0.40%closed at 96.77
How big a move#14,261of 24,799 trading days since 1928
$100 in the index since$7,961price only, to September 24, 2026
Stocks that rose1,048of 4,652; 1,208 fell
Biggest companyInternational Business Machines Corporationby market value that day
Last day of trading for3stocks

Biggest rises among the 500 largest companies

Amax Inc. (AMX)+9.9%
Supron Energy Corp (SUE)+5.0%
Be Holdings Inc -cl A+3.9%

Biggest falls among the 500 largest companies

Zenith Electronics (ZE)-4.2%
Goodrich (GR)-3.7%
Searle G D & (SRL)-3.3%

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

‹ August 30, 1977 · Every August 31 · September 1, 1977 ›

Ask the Lab what came after a day like this

History, not advice. How these numbers are made.