Underfolio

Every trading day › 1987

The stock market on October 19, 1987

October 19, 1987, a Monday. Black Monday: the biggest one-day fall in the S&P 500's history. The S&P 500 fell 20.47% to close at 224.84. Of 6,388 US stocks that traded, 165 rose and 5,388 fell.

The S&P 500-20.47%closed at 224.84
How big a move#1of 24,799 trading days since 1928
$100 in the index since$3,426price only, to September 24, 2026
Stocks that rose165of 6,388; 5,388 fell
Biggest companyInternational Business Machines Corporationby market value that day

Biggest rises among the 500 largest companies

Newmont Gold Co (NGC)+10.5%
Supervalu (SVU)+2.5%

Biggest falls among the 500 largest companies

Telerate Inc (TLR)-42.1%
Brunswick (BC)-40.0%
TJX Companies, Inc. (The) (TJX)-36.9%

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

‹ October 16, 1987 · Every October 19 · October 20, 1987 ›

Ask the Lab what came after a day like this

History, not advice. How these numbers are made.