Futu and UP Fintech's Tiger Brokers face a regulatory threat to their core mainland Chinese business. China's CSRC and seven other government departments launched a crackdown on illegal cross-border securities, futures and fund business, opening investigations and issuing advance penalty notices against Futu, Tiger Brokers and Longbridge. They are accused of providing brokerage, margin financing, fund sales and futures services to mainland investors without approval. x.com