Underfolio

Every trading day › 1977

The stock market on March 21, 1977

March 21, 1977, a Monday. The S&P 500 fell 0.54% to close at 101.31. Of 4,663 US stocks that traded, 998 rose and 1,450 fell.

The S&P 500-0.54%closed at 101.31
How big a move#11,761of 24,799 trading days since 1928
$100 in the index since$7,605price only, to September 24, 2026
Stocks that rose998of 4,663; 1,450 fell
Biggest companyInternational Business Machines Corporationby market value that day
Last day of trading for1stock

Biggest rises among the 500 largest companies

Houston Oil & Minerals (HOI)+4.5%
Southland Royalty Co (SRO)+3.8%
Mead (MEA)+3.4%

Biggest falls among the 500 largest companies

Dana (DAN)-4.1%
Pioneer Hi-Bred International, Inc. (PHB)-4.0%
Data General Corp (DGN.)-3.9%

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

‹ March 18, 1977 · Every March 21 · March 22, 1977 ›

Ask the Lab what came after a day like this

History, not advice. How these numbers are made.