[Advanced Knowledge of China's Regulatory Crackdown: Hundreds Short Sell Tiger and Futu, Facing Lawsuit] According to a report by Jinse Finance, one of the largest options market makers in the U.S., Susquehanna International Group (SIG), filed a lawsuit on June 29, 2026, in the U.S. Federal Court in Manhattan, New York. The lawsuit alleges that hundreds of individuals were suspected of obtaining advanced knowledge of China's regulatory action on May 22 to crack down on illegal cross-border stock trading. These individuals allegedly purchased an unusually large volume of put options for Tiger Brokers (NASDAQ: TIGR) and Futu Holdings (NASDAQ: FUTU), which were heavily penalized, profiting over $100 million. According to the latest report from Bloomberg, the judge of the Manhattan Federal Court has ordered the freezing of certain related accounts under three brokerage firms and has issued subpoenas to the firms to obtain the identity information of the account holders.