Last week, I wrote about how algorithms led to the fastest bear market in history. I explained that what’s driving the speed and severity of the bear market is the escalation of algorithmic trading, which is more prevalent than it was during the Great Recession in 2008.
March 2020 holds the record for how quickly stock prices dropped into a bear market — only 16 days after the S&P 500 Index hit its last closing high Feb. 19. The second-fastest bear market was the notorious 1929 crash that set off the Great Depression, followed by the elevator drop of 1987’s Black Monday.
Americans invested in stocks through 401(k)s and other retirement accounts may be unaware that they are part of a small minority of investors who are in it for the long run. Guy De Blonay, a fund manager at Jupiter Asset Management, said 80% of the stock market was controlled by machines during the selloff in 2018’s fourth quarter. In 2017, analysts at J.P. Morgan said “fundamental discretionary traders” accounted for only 10% of stock trading volume.
The “flash crash” on May 6, 2010, caused the Dow Jones Industrial Average DJIA, -4.44% to drop 998.5 points (about 9%) within minutes, only to recover a large part of the decline later in the day.
