US chipmakers climb as tariff impact seen as contained

** U.S. chipmakers' shares rise in premarket trading as several companies avoid Trump's latest tariffs

** Nvidia NVDA.O up about 1%, Advanced Micro Devices AMD.O and Intel INTC.O climb nearly 2%

** Micron Technology MU.O jumps 4%, Super Micro Computer SMCI.O gains about 1.5%

** Broadcom AVGO.O, Marvel Technology MRVL.O and Qualcomm QCOM.O adds between 0.5%-0.8%

** Philadelphia Semiconductor Index .SOX is up around 11.5% YTD

** "Given the complexity of the semiconductor supply chain, details on how, and on whom the tariffs will be applied are critical to fully assess their impact," UBS GWM says

** Adds, tariff impact appears "manageable" as most chips enter U.S. within systems, not as standalone components