Underfolio

Every trading day › 1986

The stock market on July 23, 1986

July 23, 1986, a Wednesday. The S&P 500 rose 0.21% to close at 238.67. Of 5,899 US stocks that traded, 1,890 rose and 1,870 fell.

The S&P 500+0.21%closed at 238.67
How big a move#18,872of 24,799 trading days since 1928
$100 in the index since$3,228price only, to September 24, 2026
Stocks that rose1,890of 5,899; 1,870 fell
Biggest companyInternational Business Machines Corporationby market value that day
Last day of trading for2stocks

Biggest rises among the 500 largest companies

Enron (ENRNQ)+8.6%
Tandem Computers Inc (TDM.)+7.1%
Metaldyne Corp+7.1%

Biggest falls among the 500 largest companies

Reebok International (RBK)-6.1%
American Medical Int'l (AMI)-5.6%
Humana (HUM)-5.5%

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

‹ July 22, 1986 · Every July 23 · July 24, 1986 ›

Ask the Lab what came after a day like this

History, not advice. How these numbers are made.