Underfolio

Every trading day › 1987

The stock market on September 23, 1987

September 23, 1987, a Wednesday. The S&P 500 rose 0.53% to close at 321.19. Of 6,380 US stocks that traded, 2,375 rose and 1,693 fell.

The S&P 500+0.53%closed at 321.19
How big a move#11,973of 24,799 trading days since 1928
$100 in the index since$2,399price only, to September 24, 2026
Stocks that rose2,375of 6,380; 1,693 fell
Biggest companyInternational Business Machines Corporationby market value that day
Last day of trading for3stocks

Biggest rises among the 500 largest companies

Lotus Development Corp (LOTS.)+10.8%
Aeroquip-Vickers (ANV)+10.3%
Tjx Companies Inc -old (TJX.)+7.1%

Biggest falls among the 500 largest companies

Hasbro (HAS)-6.8%
Dow Jones (DJ)-4.5%
Warner-Lambert (WLA)-4.2%

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

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

Ask the Lab what came after a day like this

History, not advice. How these numbers are made.