Underfolio

Every trading day › 1987

The stock market on July 23, 1987

July 23, 1987, a Thursday. The S&P 500 fell 0.21% to close at 307.81. Of 6,287 US stocks that traded, 1,711 rose and 2,257 fell.

The S&P 500-0.21%closed at 307.81
How big a move#18,651of 24,799 trading days since 1928
$100 in the index since$2,503price only, to September 24, 2026
Stocks that rose1,711of 6,287; 2,257 fell
Biggest companyInternational Business Machines Corporationby market value that day
Last day of trading for2stocks

Biggest rises among the 500 largest companies

Mead (MEA)+6.0%
Polaroid (PRDCQ)+5.8%
Harcourt General (H)+5.5%

Biggest falls among the 500 largest companies

Hasbro (HAS)-7.1%
Seagate Technology (SEG)-5.7%
Battle Mountain Gold Co (BMG)-5.2%

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

‹ July 22, 1987 · Every July 23 · July 24, 1987 ›

Ask the Lab what came after a day like this

History, not advice. How these numbers are made.