Medical officers spray Indonesian nationals with antiseptic as they arrive from Wuhan, China's center of the coronavirus epidemic, and before transferring them to the Natuna Islands military base to be quarantined, at Hang Nadim Airport in Batam, Riau Islands, Indonesia, February 2, 2020.

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4:01 pm: Dow ends the day up 480 points

The Dow finished the session about 483 points higher, building on solid gains on Tuesday. As of Wednesday's close, the 30-stock index has added more than 1,000 points this week as investors shake off fears that the coronavirus will slow down the global economy. The S&P 500 scored a new record close, fully erasing any coronavirus-related losses. Tesla ended the day down 17% for its second-worst drop ever.  —Li