Five of the most valuable technology companies lost $321.6 billion in value March 9 during the worst date for U.S. stocks since the 2008 financial crisis, according to CNBC.
The market crash was set off by the spread of the coronavirus and tumbling oil prices. On March 7, Saudi Arabia cut official crude selling prices for April. At closing, only nine companies on the S&P 500 ended in the green.
Apple shares plunged 7.9 percent. Microsoft, Facebook and Alphabet each fell more than 6 percent while Amazon lost 5.3 percent. These companies have been the biggest contributors to the market's rally in February.