Underfolio

Every trading day › 1988

The stock market on July 18, 1988

July 18, 1988, a Monday. The S&P 500 fell 0.57% to close at 270.51. Of 6,203 US stocks that traded, 1,722 rose and 2,033 fell.

The S&P 500-0.57%closed at 270.51
How big a move#11,309of 24,799 trading days since 1928
$100 in the index since$2,848price only, to September 24, 2026
Stocks that rose1,722of 6,203; 2,033 fell
Biggest companyInternational Business Machines Corporationby market value that day
Last day of trading for2stocks

Biggest rises among the 500 largest companies

MCI Communications (MCIC.)+7.8%
ConocoPhillips (P)+7.0%
Continental Telecom (CTC)+5.5%

Biggest falls among the 500 largest companies

Lotus Development Corp (LOTS.)-6.2%
Mallinckrodt (MKG)-4.9%
Stone Container (STO)-4.0%

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

‹ July 15, 1988 · Every July 18 · July 19, 1988 ›

Ask the Lab what came after a day like this

History, not advice. How these numbers are made.