Underfolio

Every trading day › 1971

The stock market on September 28, 1971

September 28, 1971, a Tuesday. The S&P 500 rose 0.27% to close at 97.88. Of 2,357 US stocks that traded, 910 rose and 874 fell.

The S&P 500+0.27%closed at 97.88
How big a move#17,308of 24,799 trading days since 1928
$100 in the index since$7,871price only, to September 24, 2026
Stocks that rose910of 2,357; 874 fell
Biggest companyInternational Business Machines Corporationby market value that day

Biggest rises among the 500 largest companies

Texas Oil & Gas (TXO)+5.2%
Sterling Drug (STY)+3.9%

Biggest falls among the 500 largest companies

Sperry (SY)-5.1%
Ncr Corp. (NCR)-4.6%
Foot Locker (Z)-4.5%

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

‹ September 27, 1971 · Every September 28 · September 29, 1971 ›

Ask the Lab what came after a day like this

History, not advice. How these numbers are made.