The losses accelerated in the last hour of trading as President Donald Trump advised Americans to avoid large gatherings. He also said he sees a chance of recession and promised help to the struggling airline industry.
The losses came as huge swaths of the economy come closer to a standstill due to the outbreak as businesses and travel shut down. On Monday: The S&P 500 index fell 324.89 points, or 12%, to 2,386.13.
The Dow Jones Industrial Average slid 2,997.10 points, or 12.9%, to 20,188.52. The Nasdaq dropped 970.28 points, or 12.3%, to 6,904.59. The Russell 2000 index of smaller company stocks lost 172.72 points, or 14.3%, to 1,037.42.
For the year: The S&P 500 is down 844.65 points, or 26.1%. The Dow is down 8,349.92 points, or 29.3%. The Nasdaq is down 2,068.01 points, or 23%. The Russell 2000 is down 631.05 points, or 37.8%.