Shanghai-based chip firm MetaX Integrated Circuits has emerged as the latest star in mainland China’s stock market, with the graphics processing unit (GPU) maker proving to be even more popular among retail investors than peer Moore Threads ahead of its trading debut. MetaX attracted 5.17 million retail investors for its online subscription, giving it a final allotment rate of 0.033 per cent, according to a stock exchange filing on Monday. Beijing-based Moore Threads drew 4.82 million retail...