Underfolio

Every trading day › 1987

The stock market on July 13, 1987

July 13, 1987, a Monday. The S&P 500 fell 0.24% to close at 307.63. Of 6,273 US stocks that traded, 1,784 rose and 2,168 fell.

The S&P 500-0.24%closed at 307.63
How big a move#17,981of 24,799 trading days since 1928
$100 in the index since$2,504price only, to September 24, 2026
Stocks that rose1,784of 6,273; 2,168 fell
Biggest companyInternational Business Machines Corporationby market value that day
Last day of trading for1stock

Biggest rises among the 500 largest companies

Tandem Computers Inc (TDM.)+7.9%
Seagate Technology (SEG)+7.6%
Apple (AAPL)+6.6%

Biggest falls among the 500 largest companies

Entergy (ETR)-3.5%
Supervalu (SVU)-3.4%
U.S. Bancorp (USB)-3.4%

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

‹ July 10, 1987 · Every July 13 · July 14, 1987 ›

Ask the Lab what came after a day like this

History, not advice. How these numbers are made.