Underfolio

Every trading day › 1986

The stock market on March 12, 1986

March 12, 1986, a Wednesday. The S&P 500 rose 0.37% to close at 232.54. Of 5,738 US stocks that traded, 2,307 rose and 1,526 fell.

The S&P 500+0.37%closed at 232.54
How big a move#15,063of 24,799 trading days since 1928
$100 in the index since$3,313price only, to September 24, 2026
Stocks that rose2,307of 5,738; 1,526 fell
Biggest companyInternational Business Machines Corporationby market value that day

Biggest rises among the 500 largest companies

Molex (MOLX)+8.1%
Maytag (MYG)+6.4%
Unocal Exploration Corp (UXC)+6.4%

Biggest falls among the 500 largest companies

Tribune (TRB)-4.2%
Data General Corp (DGN.)-3.9%
Illinois Tool Works (ITW)-3.6%

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

‹ March 11, 1986 · Every March 12 · March 13, 1986 ›

Ask the Lab what came after a day like this

History, not advice. How these numbers are made.