Underfolio

Every trading day › 1978

The stock market on October 9, 1978

October 9, 1978, a Monday. The S&P 500 rose 1.03% to close at 104.59. Of 4,552 US stocks that traded, 1,671 rose and 836 fell.

The S&P 500+1.03%closed at 104.59
How big a move#5,751of 24,799 trading days since 1928
$100 in the index since$7,366price only, to September 24, 2026
Stocks that rose1,671of 4,552; 836 fell
Biggest companyAT&T Corporationby market value that day

Biggest rises among the 500 largest companies

National Semiconductor (NSM)+5.0%
Alcoa (AA)+4.9%
Studebaker-Worthington Inc (SKW)+4.8%

Biggest falls among the 500 largest companies

Mead (MEA)-3.8%
Masco (MAS)-3.1%
Petrie Stores Liquidation Tr-2.3%

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

‹ October 6, 1978 · Every October 9 · October 10, 1978 ›

Ask the Lab what came after a day like this

History, not advice. How these numbers are made.