BUZZ-AI-linked stocks slump after China upgrades low-cost, low-power AI model

Updates

** Shares of U.S. AI stocks fall in morning trade after surging popularity of Chinese discount AI model wobbles investors' faith in the technology's profitability

** Startup DeepSeek rolled out a free assistant it says uses lower-cost chips and less data, sparking worries about profits of rivals and the need for costly tech

** Nvidia NVDA.O hits near 4-month low, down 11.5%, AI server maker Super Micro SMCI.O down 8.3% and Dell DELL.N hits over 4-month low, down 7%

** Broadcom AVGO.O hits over 1-month low, down 12%

** Microsoft MSFT.O down 3.6%, Alphabet GOOGL.O down 3.5%, Meta META.O down 2.5%, and Oracle ORCL.N down 8.6%

** Chipmaker Marvell Technology MRVL.O and Advanced Micro Devices AMD.O falls to over 1-month low, down 14.9% and 4.6%, respectively

** Shares of chip-making equipment companies down; Applied Materials AMAT.O down 6%, Lam Research LRCX.O down 5.7% and KLA Corp KLAC.O down 5.3%

** Palantir Technologies PLTR.O falls 5.1%

** Smaller AI stocks C3.ai AI.N down 5% and BigBear.ai BBAI.N down 6.9%

** Vertiv Holdings VRT.N, which designs and builds data center infrastructure falls 22%

** Energy firms, which plan on powering AI data centers, fall: Vistra VST.N and Constellation Energy CEG.O down 19.5% and 16%, respectively

** U.S.-listed shares of Arm Holdings ARM.O down 8.3% and TSMC TSM.N fall 9.3%

** Philadelphia SE semiconductor index hits two-week low, down 6.4%