Underfolio

Every trading day › 1971

The stock market on August 11, 1971

August 11, 1971, a Wednesday. The S&P 500 rose 1.20% to close at 94.66. Of 2,331 US stocks that traded, 1,325 rose and 537 fell.

The S&P 500+1.20%closed at 94.66
How big a move#4,569of 24,799 trading days since 1928
$100 in the index since$8,139price only, to September 24, 2026
Stocks that rose1,325of 2,331; 537 fell
Biggest companyInternational Business Machines Corporationby market value that day

Biggest rises among the 500 largest companies

Winnebago Industries, Inc. (WGO)+9.6%
Multigraphics Inc (MTI)+9.1%
Flagstar Corp+8.9%

Biggest falls among the 500 largest companies

Hershey (HSY)-3.0%
KeySpan (KSE)-2.2%
Nch Corp (NCH)-2.0%

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

‹ August 10, 1971 · Every August 11 · August 12, 1971 ›

Ask the Lab what came after a day like this

History, not advice. How these numbers are made.