Although the Dow Jones Industrial Average rose 0.1 percent, the broad S&P 500 and technology-heavy Nasdaq Composite fell 0.5 and 1.3 percent, respectively.
A barrel of North Sea oil now costs $104, after futures rose almost 4 percent.
The situation around the Persian Gulf, the fighting in Yemen, attacks on Saudi Arabia and a storm approaching oil platforms in the Gulf of Mexico are weighing on markets.
Furthermore, US market interest rates rose sharply on Thursday, the day after the Federal Reserve signaled its willingness to raise the key interest rate if necessary to curb inflation.
In addition, unexpectedly weak sales figures from OpenAI caused other AI companies, including Nvidia, Qualcomm, Marvell, AMD and Broadcom, to fall significantly.
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