Here is a comprehensive summary of the article, formatted as requested:

The 2020 stock market crash occurred from 20 February to 7 April 2020, abruptly ending a decade of global prosperity as the COVID-19 pandemic triggered a financial panic. Before the crash, warning signs included a U.S. Treasury yield curve inversion throughout 2019 and an IMF-reported "synchronized slowdown," with economists like Campbell Harvey predicting a recession, while others dismissed the signal as unreliable. The turmoil featured dramatic sell-offs, including Black Monday I (9 March), Black Thursday (12 March), and the worst drop, Black Monday II (16 March), when global markets fell 12–13%, prompting central banks to slash interest rates. This crash formally initiated the COVID-19 recession, following a period of record-low unemployment, but was worsened by supply disruptions, panic buying, and pre-existing vulnerabilities like Brexit and the U.S.-China trade war. The market briefly entered a bear market before rebounding to a bull market in April 2020, though U.S. indices did not regain their January 2020 highs until November 2020.