Underfolio

Every trading day › 1981

The stock market on April 20, 1981

April 20, 1981, a Monday. The S&P 500 rose 0.56% to close at 135.45. Of 4,782 US stocks that traded, 1,725 rose and 1,402 fell.

The S&P 500+0.56%closed at 135.45
How big a move#11,470of 24,799 trading days since 1928
$100 in the index since$5,688price only, to September 24, 2026
Stocks that rose1,725of 4,782; 1,402 fell
Biggest companyAT&T Corporationby market value that day

Biggest rises among the 500 largest companies

Archer Daniels Midland (ADM)+9.4%
Scientific-Atlanta (SFA)+8.6%
M/a-com (MAI)+8.1%

Biggest falls among the 500 largest companies

Phoenix Resource Cos (PHN)-7.7%
Crystal Gas Storage Inc (COR)-5.9%
Southland Royalty Co (SRO)-5.9%

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

‹ April 16, 1981 · Every April 20 · April 21, 1981 ›

Ask the Lab what came after a day like this

History, not advice. How these numbers are made.