The Philadelphia Semiconductor Index declined 1% intraday as weakness spread across major semiconductor stocks. GlobalFoundries led the losses with a drop of nearly 10%, while Qualcomm fell more than 6%. Intel lost over 3% and Arm slipped nearly 2%. By contrast, Micron and TSMC (Taiwan Semiconductor Manufacturing Company, major chipmaker) remained higher by more than 2%, but those gains were not enough to prevent the broader index from moving lower. The moves point to uneven sentiment across the semiconductor sector, where declines in large constituents can outweigh advances elsewhere.