Global Market: China stocks slide to one-week low as AI valuation concerns hit tech shares

Chinese blue-chip CSI300 index fell 2.3 percent to a one-week low while the Shanghai Composite dropped 1 percent to 3,820.52, driven by heavy selling in technology and semiconductor shares. The STAR 50 Index tumbled 4 percent, the CSI AI Index slumped 5.1 percent, and the semiconductor index fell 3.7 percent, reflecting investor concerns about stretched AI valuations. The selloff extended to South Korea and Japan, with markets awaiting US policy decisions and China's Politburo meeting for further direction.