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A sharp sell-off in U.S. semiconductor stocks spilled into Asian markets on Tuesday, dragging down shares of SK Hynix and SoftBank. Nvidia and AMD shares also declined even after unveiling new AI hardware and software designs for future data centers, with analysts noting the revenue potential remains far out. Optical networking stocks such as Ciena and Lumentum were among the market's biggest losers, a move seen partly as a reaction to recent cautious commentary on AI spending.