Underfolio

Every trading day › 1980

The stock market on September 15, 1980

September 15, 1980, a Monday. The S&P 500 rose 0.10% to close at 125.67. Of 4,580 US stocks that traded, 1,556 rose and 1,426 fell.

The S&P 500+0.10%closed at 125.67
How big a move#21,729of 24,799 trading days since 1928
$100 in the index since$6,130price only, to September 24, 2026
Stocks that rose1,556of 4,580; 1,426 fell
Biggest companyInternational Business Machines Corporationby market value that day

Biggest rises among the 500 largest companies

Computervision Corp -old (CVN)+7.5%
Be Holdings Inc -cl A+7.3%
RadioShack (TAN)+7.2%

Biggest falls among the 500 largest companies

Campbell Red Lake Mines (CRK)-7.2%
Asarco Inc (AR)-6.7%
Cabot Corporation (CBT)-6.3%

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

‹ September 12, 1980 · Every September 15 · September 16, 1980 ›

Ask the Lab what came after a day like this

History, not advice. How these numbers are made.