https://www.reuters.com/article/us-china-ant-group-investors/chinas-revamp-of-ant-dents-investor-appetite-for-ipo-revival-idUSKBN2C00GL >BOSTON/NEW YORK (Reuters) -China's regulatory-imposed revamp of Jack Ma's Ant Group, transforming the hot fintech into a financial holding company, appears to have dented some investor appetite for any plans to revive what would have been the world's biggest IPO.