This month marks five years since the covid market downturn.Though the initial downturn on March 9, 2020, was dramatic—the US stock market lost nearly 8% in one day—the US stock market ultimately recovered from that crash in just four months, making it the fastest recovery of any market crash over the past 150 years.Not even two years later, the stock market experienced a worse downturn: The market took 4 times as long (18 months) to recover from the crash of December 2021, spurred by the Russia...