Micron Technology climbed $58.67, or 6.04%, on Monday as growing confidence in AI spending and expectations of tighter U.S. pressure on Chinese memory suppliers lifted semiconductor shares. Investors focused on comments from U.S. Commerce Secretary Howard Lutnick that the Trump administration does not support Apple buying memory chips from China, a stance the market read as supportive for Taiwanese, South Korean and U.S. memory makers, while Anthropic reportedly posted second-quarter revenue above $11.5 billion, underscoring the pace of AI infrastructure investment. The Philadelphia Semiconductor Index rose 325.36 points, or 2.62%, the Nasdaq Composite edged up 8.25 points, or 0.03%, and TSMC ADR gained $8.54, or 2.00%, even as the Dow Jones Industrial Average fell 144.78 points and the S&P 500 slipped 12.62 points; oil also moved higher after the U.S.-Iran ceasefire expired and negotiations stalled. Softer retail sales and tame inflation shifted attention from the risk of a Federal Reserve hike next month toward potential rate cuts, with Federal Reserve minutes due Wednesday. In Taiwan, foreign investors extended spot-market net buying to five sessions and the benchmark index stayed above major moving averages, though futures settlement and net short positions of more than 85,000 contracts pointed to the risk of sharper swings.