Underfolio

Every trading day › 1971

The stock market on October 11, 1971

October 11, 1971, a Monday. The S&P 500 fell 0.15% to close at 99.21. Of 2,364 US stocks that traded, 786 rose and 1,052 fell.

The S&P 500-0.15%closed at 99.21
How big a move#20,454of 24,799 trading days since 1928
$100 in the index since$7,765price only, to September 24, 2026
Stocks that rose786of 2,364; 1,052 fell
Biggest companyInternational Business Machines Corporationby market value that day

Biggest rises among the 500 largest companies

Braniff International Corp (BNF)+5.2%
Eckerd (ECK)+4.2%
Flagstar Corp+3.5%

Biggest falls among the 500 largest companies

Winnebago Industries, Inc. (WGO)-6.9%
Lubrizol (LZ)-4.4%
American Broadcasting (ABC)-3.8%

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

‹ October 8, 1971 · Every October 11 · October 12, 1971 ›

Ask the Lab what came after a day like this

History, not advice. How these numbers are made.