https://www.reuters.com/article/us-minmetals-alibaba/chinas-market-regulator-investigates-alibaba-minmetals-jv-idUSKBN2C61CJ >BEIJING (Reuters) -China's market regulator is investigating a joint venture between e-commerce giant Alibaba Group and Minmetals Development, Minmetals said on Monday, amid a broad antitrust clampdown on internet firms.