Underfolio

Every trading day › 1988

The stock market on May 23, 1988

May 23, 1988, a Monday. The S&P 500 fell 0.87% to close at 250.83. Of 6,223 US stocks that traded, 1,409 rose and 2,422 fell.

The S&P 500-0.87%closed at 250.83
How big a move#7,280of 24,799 trading days since 1928
$100 in the index since$3,071price only, to September 24, 2026
Stocks that rose1,409of 6,223; 2,422 fell
Biggest companyInternational Business Machines Corporationby market value that day
Last day of trading for5stocks

Biggest rises among the 500 largest companies

First Boston Inc (FBC)+6.2%
General Instrument (GIC)+4.1%
DirecTV (GMH)+3.6%

Biggest falls among the 500 largest companies

MCI Communications (MCIC.)-4.5%
Aflac (AFL)-4.3%
Conrail (CRR)-4.1%

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

‹ May 20, 1988 · Every May 23 · May 24, 1988 ›

Ask the Lab what came after a day like this

History, not advice. How these numbers are made.