Underfolio

Every trading day › 1978

The stock market on March 31, 1978

March 31, 1978, a Friday. The S&P 500 fell 0.22% to close at 89.21. Of 4,556 US stocks that traded, 1,140 rose and 1,153 fell.

The S&P 500-0.22%closed at 89.21
How big a move#18,415of 24,799 trading days since 1928
$100 in the index since$8,636price only, to September 24, 2026
Stocks that rose1,140of 4,556; 1,153 fell
Biggest companyAT&T Corporationby market value that day
Last day of trading for4stocks

Biggest rises among the 500 largest companies

Airco Inc (AN)+5.5%
Time Warner (TWX)+3.5%
Primerica, Inc. (PRI)+3.5%

Biggest falls among the 500 largest companies

Hanna (M A) Co (MAH)-3.9%
Intel (INTC)-3.4%
Lubrizol (LZ)-3.0%

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

‹ March 30, 1978 · Every March 31 · April 3, 1978 ›

Ask the Lab what came after a day like this

History, not advice. How these numbers are made.