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Traders wearing masks work inside posts, on the first day of in-person trading since the closure during the outbreak of the coronavirus disease (COVID-19) on the floor at the New York Stock Exchange (NYSE) in New York, U.S., May 26, 2020.Brendan McDermid | Reuters

Here's what happened to the stock market on Wednesday

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Dow Jones Industrial Average jumps 439 points

The Dow rallied 439.58 points, or 1.6%, to close at 27,940.47. The S&P 500 jumped 2% to 3,398.96. The Nasdaq Composite advanced 2.7% to 11,141.56. Tech shares rebounded, helping the broader market recover from a tough three-day stretch. 

Tech bounces back

Tesla shares rallied 10.9% a day after their biggest one-day sell-off on record. Apple advanced 4% to lead the Dow higher. Facebook, Amazon, Alphabet and Microsoft were also higher. "We were due for a bounce," said one trader. "We had three days of decent selling and these things tend to get a little overextended."

Druckenmiller urges caution

Despite Wednesday's sharp gains, Stanley Druckenmiller thinks investors need to be careful around this market. "Right now, we're in an absolute raging mania," he said on CNBC's "Squawk Box." "Everybody loves a party ... but, inevitably, after a big party there's a hangover."

What happens next?

Weekly jobless claims numbers are set for release Thursday. 

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