Underfolio

Every trading day › 1986

The stock market on May 23, 1986

May 23, 1986, a Friday. The S&P 500 rose 0.51% to close at 241.35. Of 5,793 US stocks that traded, 2,236 rose and 1,444 fell.

The S&P 500+0.51%closed at 241.35
How big a move#12,246of 24,799 trading days since 1928
$100 in the index since$3,192price only, to September 24, 2026
Stocks that rose2,236of 5,793; 1,444 fell
Biggest companyInternational Business Machines Corporationby market value that day
Last day of trading for1stock

Biggest rises among the 500 largest companies

Lin Broadcasting (LINB)+6.5%
Safeway (SWY)+5.9%
Pharmacia (PNU)+5.8%

Biggest falls among the 500 largest companies

Telepictures Corp (TPIX)-5.1%
Tandem Computers Inc (TDM.)-4.9%

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

‹ May 22, 1986 · Every May 23 · May 27, 1986 ›

Ask the Lab what came after a day like this

History, not advice. How these numbers are made.