Underfolio

Every trading day › 1971

The stock market on April 1, 1971

April 1, 1971, a Thursday. The S&P 500 rose 0.08% to close at 100.39. Of 2,304 US stocks that traded, 835 rose and 998 fell.

The S&P 500+0.08%closed at 100.39
How big a move#22,478of 24,799 trading days since 1928
$100 in the index since$7,674price only, to September 24, 2026
Stocks that rose835of 2,304; 998 fell
Biggest companyInternational Business Machines Corporationby market value that day

Biggest rises among the 500 largest companies

Cyprus Mines (CYM)+7.3%
Owens Corning (OWC)+7.0%
Cummins (CUM)+5.9%

Biggest falls among the 500 largest companies

Genuine Parts (GPC)-4.3%
American Cyanamid (ACY)-3.8%
Maxxam Group Holdings Inc-3.7%

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

‹ March 31, 1971 · Every April 1 · April 2, 1971 ›

Ask the Lab what came after a day like this

History, not advice. How these numbers are made.