China's tech index worst-performing globally, down 40% in 6 months

China's Nasdaq-style Star50 Index has tumbled nearly 40% in the current half-year, becoming the world's worst-performing major tech gauge. Chipmakers MetaX Integrated Circuits Shanghai and Moore Threads Technology have each lost around half their value, while the hardware-focused ChiNext index has fallen 36%. The declines come as the global AI trade loses momentum and investor sentiment weakens.