Underfolio

Every trading day › 1987

The stock market on May 20, 1987

May 20, 1987, a Wednesday. The S&P 500 fell 0.50% to close at 278.21. Of 6,183 US stocks that traded, 1,345 rose and 2,703 fell.

The S&P 500-0.50%closed at 278.21
How big a move#12,370of 24,799 trading days since 1928
$100 in the index since$2,769price only, to September 24, 2026
Stocks that rose1,345of 6,183; 2,703 fell
Biggest companyInternational Business Machines Corporationby market value that day
Last day of trading for1stock

Biggest rises among the 500 largest companies

Alexander & Alexander (AAL)+13.3%
FMC Corporation (FMC)+5.4%
Kraft General Foods+5.0%

Biggest falls among the 500 largest companies

Parker-Hannifin (PH)-8.9%
Usg Corp. (USG)-8.6%
Sysco (SYY)-7.7%

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

‹ May 19, 1987 · Every May 20 · May 21, 1987 ›

Ask the Lab what came after a day like this

History, not advice. How these numbers are made.