On what date did the S&P 500 reach its 2020 COVID-19 crash low?

The S&P 500 reached its 2020 COVID-19 crash low on March 23, 2020.

The index had fallen rapidly from its record closing high on February 19 as the coronavirus spread internationally. Governments introduced travel restrictions, business closures, and other measures, while investors assessed the likely economic shock.

The March 23 low followed several exceptionally volatile sessions and marked a decline of about 34% from the February peak. Massive monetary and fiscal support, along with changing expectations about the pandemic and reopening, helped U.S. equities begin a powerful rebound afterward.

The episode is often called the COVID-19 crash, but its effects were global. Equity markets, energy prices, credit markets, and labor markets all experienced severe disruption during the first months of the pandemic.