Underfolio

Every trading day › 1984

The stock market on May 21, 1984

May 21, 1984, a Monday. The S&P 500 fell 0.67% to close at 154.73. Of 5,757 US stocks that traded, 1,091 rose and 2,156 fell.

The S&P 500-0.67%closed at 154.73
How big a move#9,636of 24,799 trading days since 1928
$100 in the index since$4,979price only, to September 24, 2026
Stocks that rose1,091of 5,757; 2,156 fell
Biggest companyInternational Business Machines Corporationby market value that day

Biggest rises among the 500 largest companies

Apple (AAPL)+7.1%
Telerate Inc (TLR)+6.9%
Ethyl (NEU)+6.8%

Biggest falls among the 500 largest companies

Electronic Data Systems (EDS.)-6.8%
First Chicago Corp (FNB.)-5.9%
Paccar (PCAR)-5.7%

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

‹ May 18, 1984 · Every May 21 · May 22, 1984 ›

Ask the Lab what came after a day like this

History, not advice. How these numbers are made.