(Bloomberg) — US-listed Chinese stocks plunged Thursday, poised for their biggest weekly losses since May, as a report that Alibaba Group Holding Ltd. Facing an investigation in China into a data theft case, regulators in general have renewed concerns. Most read by Bloomberg The Nasdaq Golden Dragon China Index fell about 2%, led by Alibaba, which fell a whopping 7.7% in a five-day losing streak. Technology colleagues Baidu Inc. and JD.com Inc. were down 2.5% and 0.5%, respectively, while Nio Inc.’s share of electric vehicles. 0.3% lost. Executives of Alibaba Group’s cloud division have been called to talks by authorities...