Advanced Micro Devices is trading 3.37% lower at $585.13 as semiconductor shares face concerns about Chinese competition and returns on heavy AI investment. - CXMT’s progress on a denser memory-chip design has heightened competition worries, while investors reassess AI valuations and infrastructure spending. - No clear company-specific catalyst was identified; the supplied sector context shows SOXX down 2.51%. - The reported nVent cooling partnership relates to the Helios platform but does not explain the drop; intraday volume data was unavailable.