After a few minutes of trading, the Dow Jones Industrial Average was up 0.2 percent, the S&P 500 rose 1.1 percent and the tech-heavy Nasdaq Composite rose 1.6 percent.
Nvidia's stock is recovering after CEO Jensen Huang's infidelity scandal. The stock, which fell more than 4 percent on Monday and another 5.5 percent on Tuesday, was up 2.7 percent.
CoreWeave surged 15.9 percent after its quarterly report was released following the close of trading on Tuesday. The results also lifted many technology stocks in Asia and Europe.
The price of North Sea crude (Brent) futures rose 1.4 percent to $92.70 a barrel on Wednesday.
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