The technology sector rose as investors swooped to buy during a selloff related to the coronavirus scare.
Shares of high-momentum companies such as Tesla added to recent gains.
"It's also pretty clear right now that the mentality of market participants is to buy on the dip, and so that tends to be positive for stocks," said Oliver Pursche, chief market strategist at broker-dealer Bruderman Brothers.
Intel shares rose after-hours as demand from personal-computer makers and data centers boosted the chip maker's earnings. Xerox Holdings said it plans to nominate 11 independent candidates to replace HP's board at the computer and printer maker's annual shareholder meeting this summer.
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