Woofun AI data shows that US pre-market trading on July 16 featured broad declines across semiconductor, storage, and optical communication sectors. Western Digital fell 7.13%, leading storage losses alongside SK Hynix ADR down 6.66% and SanDisk down 6.69%. Semiconductor stocks also retreated, with Arm dropping 4.70%, TSMC down 4.52%, Marvell Technology down 3.77%, AMD down 3.25%, Qualcomm down 3.12%, and NVIDIA down 1.62%. Optical communication equities weakened collectively, including Astera Labs down 4.45%, Coherent down 4.43%, Corning down 4.19%, Applied Optoelectronics down 3.98%, Nokia down 3.82%, and Credo down 3.61%.