US stocks were mixed on August 17 as rising oil prices and a rebound in long-dated Treasury yields pressured broader sentiment, offsetting another rally in AI-related semiconductor shares. By 10:15 a.m. in New York, the S&P 500 was down 0.1%, the Dow Jones Industrial Average had fallen 0.2%, and the Nasdaq 100 rose 0.2%. The move came as West Texas Intermediate crude climbed 0.5% to $83 a barrel and Brent traded around $89, while the 10-year Treasury yield rose 1 basis point to 4.70%, moving back above the closely watched threshold. Chipmakers outperformed after Bloomberg reported that Anthropic posted $11.5 billion in second-quarter revenue, up 14-fold from a year earlier, and achieved its first quarterly operating profit, reinforcing optimism around AI infrastructure demand. Micron rose more than 4% to $1,017, SK Hynix ADRs (U.S.-listed shares) gained nearly 4% to $173, Sandisk advanced more than 6%, and Broadcom and Nvidia also traded higher. Investors were also monitoring geopolitical risk after President Donald Trump threatened to bomb Oman if it entered the conflict, while a senior Iranian official said tensions would escalate in the Strait of Hormuz if diplomacy fails. Although softer inflation and weak retail sales had recently reduced expectations of a Federal Reserve rate increase in September and helped lift the S&P 500 to a record high last week, strategists said higher oil and yields were again acting as a drag. The next market focus is likely to shift to the Federal Reserve minutes on August 19 and earnings from Home Depot, Lowe's, and Walmart.