** Semiconductor firms' shares fall

** President Donald Trump said he would impose a 10% baseline tariff on all imports to the U.S. and higher duties on some of the country's biggest trading partners

** Tariffs raise concerns around higher costs and supply chain disruptions for semiconductor firms, potentially impacting their profitability and market position

** Nvidia NVDA.O falls 5.8%, Marvell Technology MRVL.O 8%, Intel INTC.O 1.5%

** Broadcom AVGO.O down 6% and Micron Technology MU.O 7.8%

** U.S.-listed shares ARM.O of British chip firm Arm Holdings fall 6.8%

** Advanced Micro Devices AMD.O down 4.3%, Qualcomm QCOM.O 4.8%

** For Nvidia and other chip players with significant exposure to China and Taiwan supply chains, the worry will be around pricing and margin impacts along with what this means for the global supply chain looking forward, Wedbush analysts said

** "One (small) solace is that semiconductors have been (for now) exempted from reciprocal tariffs (though they will presumably be hit by the 10% baseline duties)," Bernstein analysts said

** HSBC downgrades Nvidia's shares to "hold" from "buy" and cuts PT to $120 from $175

** Brokerage cites uncertainty about potential impact of a possible FY26 estimate for CSP (cloud service provider) capex peak or a possible slowdown in the long-term demand from DeepSeek

(Reporting by Harshita Mary Varghese in Bengaluru)

((HarshitaMary.Varghese@thomsonreuters.com))