Yass, the boss of Susquehanna, is actually a China expert. Back in 2009, he invested in Zhang Yiming's real estate search project 99Fang, and in 2012, he participated in ByteDance's first round of financing, taking a 15% stake. He might be the person on Wall Street who understands the 'China information gap' the best. Got burned by insider trading tied to Chinese regulators, then went to file a complaint with the SEC Now it’s up to the SEC to see if they have the ability to gather evidence on leaks within the Chinese regulatory system