The S&P 500 sank more than 2% in early trading Thursday as the market swung back to fear about the effects of a fast-spreading virus in its latest yo-yo move. Just a day earlier, the index had soared 4.2%, in part on hopes that more aggressive moves by governments and central banks around the world could help contain the economic fallout.
Get used to these kinds of swings, which will likely continue as long as the number of new infections continues to accelerate, many analysts and professional investors say.