Underfolio

Every trading day › 2021

The stock market on May 17, 2021

May 17, 2021, a Monday. The S&P 500 fell 0.25% to close at 4163.29. Of 4,197 US stocks that traded, 2,089 rose and 1,970 fell.

The S&P 500-0.25%closed at 4163.29
How big a move#17,645of 24,799 trading days since 1928
$100 in the index since$185price only, to September 24, 2026
Stocks that rose2,089of 4,197; 1,970 fell
Biggest companyAppleby market value that day

Biggest rises among the 500 largest companies

Applovin (APP)+9.0%
Roblox (RBLX)+8.4%
Western Digital (WDC)+6.3%

Biggest falls among the 500 largest companies

Airbnb (ABNB)-6.2%
Comcast (CMCSA)-5.5%
Doordash (DASH)-5.2%

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

‹ May 14, 2021 · Every May 17 · May 18, 2021 ›

Ask the Lab what came after a day like this

History, not advice. How these numbers are made.