Underfolio

Every trading day › 1981

The stock market on April 27, 1981

April 27, 1981, a Monday. The S&P 500 rose 0.25% to close at 135.48. Of 4,801 US stocks that traded, 1,601 rose and 1,518 fell.

The S&P 500+0.25%closed at 135.48
How big a move#17,673of 24,799 trading days since 1928
$100 in the index since$5,687price only, to September 24, 2026
Stocks that rose1,601of 4,801; 1,518 fell
Biggest companyAT&T Corporationby market value that day

Biggest rises among the 500 largest companies

Paradyne Corp (PDN)+6.7%
Sedco (SED)+6.3%
Mesa Inc (MXP.)+6.3%

Biggest falls among the 500 largest companies

Raychem Corp (RYC.)-5.4%
Scientific-Atlanta (SFA)-5.1%
American Homes 4 Rent (AMH)-4.2%

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

‹ April 24, 1981 · Every April 27 · April 28, 1981 ›

Ask the Lab what came after a day like this

History, not advice. How these numbers are made.