SoftBank Group CEO Masayoshi Son. The Japanese conglomerate's fortunes are tied to those of some of China's biggest tech companies. © Reuters TAIZO WADA, Nikkei staff writer July 30, 2021 03:30 JST | China Copy Copied TOKYO -- China's salvos of regulation aimed at its tech industry have caught SoftBank Group in the crossfire, deflating the value of stocks in its Vision Fund in a trend that raises questions for its investment strategy. U.S.-listed Chinese tech stocks are among the most visible benchmarks for billionaire SoftBank founder and CEO Masayoshi Son's stock-picking prowess. Their performance over the past few weeks...