Underfolio

Every trading day › 2021

The stock market on April 21, 2021

April 21, 2021, a Wednesday. The S&P 500 rose 0.93% to close at 4173.42. Of 4,114 US stocks that traded, 3,330 rose and 663 fell.

The S&P 500+0.93%closed at 4173.42
How big a move#6,672of 24,799 trading days since 1928
$100 in the index since$185price only, to September 24, 2026
Stocks that rose3,330of 4,114; 663 fell
Biggest companyAppleby market value that day
Last day of trading for2stocks

Biggest rises among the 500 largest companies

Intuitive Surgical, Inc. (ISRG)+9.9%
Signature Bank (SBNY)+9.1%
Moderna, Inc. (MRNA)+8.1%

Biggest falls among the 500 largest companies

Netflix (NFLX)-7.4%
Peloton Interactive, Inc. (PTON)-6.2%
Halliburton (HAL)-3.6%

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

‹ April 20, 2021 · Every April 21 · April 22, 2021 ›

Ask the Lab what came after a day like this

History, not advice. How these numbers are made.