[Most U.S. semiconductor stocks decline, Qualcomm drops over 7%] Odaily Planet Daily reports, according to MSX.COM data, most U.S. semiconductor stocks declined, with the Philadelphia Semiconductor Index down 1.5%. Among the components, ARM fell over 8%, Qualcomm dropped over 7%, Intel fell over 4%, Marvell Technology and AMD declined over 3%, Micron Technology dropped over 2%; Nvidia bucked the trend, rising over 3%.