TSMC is trading 3.09% lower now at $430.09 as semiconductor shares face pressure from Chinese chip competition and concerns about returns on AI investment. - Semiconductors are down 2.51%; Morningstar says CXMT’s memory-technology progress intensified competitive concerns. - Hotter-than-expected U.S. inflation is pressuring technology stocks, while investors position ahead of TSMC’s October 15 earnings and investor conference. - Taiwan market reports cite profit-taking and caution ahead of the conference, not a new company-specific negative announcement.