Underfolio

Every trading day › 1980

The stock market on March 21, 1980

March 21, 1980, a Friday. The S&P 500 fell 0.79% to close at 102.31. Of 4,543 US stocks that traded, 812 rose and 1,691 fell.

The S&P 500-0.79%closed at 102.31
How big a move#8,188of 24,799 trading days since 1928
$100 in the index since$7,530price only, to September 24, 2026
Stocks that rose812of 4,543; 1,691 fell
Biggest companyInternational Business Machines Corporationby market value that day
Last day of trading for1stock

Biggest rises among the 500 largest companies

Continental Bank Corp (CBK)+4.5%
Homestake Mining (HM)+3.9%
Providian Corp (PVN)+3.9%

Biggest falls among the 500 largest companies

Mcgraw Edison (MGR)-5.9%
Avnet (AVT)-5.7%
Superior Oil (SOC)-5.3%

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

‹ March 20, 1980 · Every March 21 · March 24, 1980 ›

Ask the Lab what came after a day like this

History, not advice. How these numbers are made.