Underfolio

Every trading day › 1983

The stock market on October 21, 1983

October 21, 1983, a Friday. The S&P 500 fell 0.62% to close at 165.95. Of 5,442 US stocks that traded, 1,242 rose and 2,099 fell.

The S&P 500-0.62%closed at 165.95
How big a move#10,480of 24,799 trading days since 1928
$100 in the index since$4,642price only, to September 24, 2026
Stocks that rose1,242of 5,442; 2,099 fell
Biggest companyInternational Business Machines Corporationby market value that day
Last day of trading for1stock

Biggest rises among the 500 largest companies

Southland Royalty Co (SRO)+5.3%
Superior Oil (SOC)+5.1%
Cray Research (CYR)+4.3%

Biggest falls among the 500 largest companies

Citicorp-6.8%
New Valley Corp (NVAL.)-6.4%
Wells Fargo & Co. (WFC.Z)-6.3%

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

‹ October 20, 1983 · Every October 21 · October 24, 1983 ›

Ask the Lab what came after a day like this

History, not advice. How these numbers are made.