How unknown Chinese ‘insider traders’ cost Jeff Yass’ firm more than $70 million
Susquehanna Investment Group, led by Jeff Yass, won a New York federal court order freezing profits of up to 100 unnamed options traders it alleges used inside information tied to China’s May 22 crackdown on international trading platforms. The suit cites illegal profits over $100m, including $70m from Susquehanna, and targets options in Futu and UP Fintech; an SEC investigation is reported.
How this was made

The 30-second read
Why it matters
The case centers on suspiciously coordinated short-dated put purchases in Futu and UP Fintech ahead of the May 22 enforcement news; the SEC is reported to be investigating, and a July 10 hearing will determine whether assets are released.
Market read
Traders may need to reassess near-term volatility, options pricing, and regulatory-likelihood assumptions for US-listed China trading platforms tied to the crackdown narrative.
What to watch
The brokerages themselves are not accused; market may differentiate between platform operators and the alleged traders once identities and evidence are tested at the July 10 hearing.
Background
Susquehanna Investment Group obtained a temporary injunction freezing profits of up to 100 unidentified options traders, alleging illegal insider trading tied to China’s planned crackdown on international trading platforms.
Ticker impact
Susquehanna alleges unknown traders bought $12M of short-dated put options on Futu ahead of China’s May 22 crackdown, boosting profits by $100M+.
Near-term downside/volatility risk as enforcement headlines and litigation uncertainty persist.
The article ties the alleged insider-trading scheme to China’s enforcement action against Futu and notes SEC is investigating the case, which can amplify risk premia.
Susquehanna says traders bought $12M of short-dated put options on UP Fintech (TIGR) before China’s crackdown, with the stock later crashing >30%.
Choppy-to-down bias possible if regulators/litigation expand or market questions China platform exposure.
The text explicitly links the crackdown day to a >30% stock drop and frames the options bets as coordinated around inside knowledge.
Market effects
Raises perceived regulatory and litigation risk for China-linked online trading platforms and their options markets.
US-listed China fintechs may see higher volatility and wider spreads as enforcement narratives spread.
Could affect cross-border broker/fintech risk appetite and hedging demand for China exposure.
Counterpoint
The freeze targets unknown brokers and alleged trading patterns; absent named defendants or proven wrongdoing, equity impact may be limited beyond short-term volatility.
Key entities
- companySusquehanna Investment Group
Proprietary trading firm that sued and won a temporary injunction freezing alleged insider-trading profits.
- companyFutu
Online trading platform named in the complaint; alleged target of coordinated put-option bets before China’s crackdown.
- companyUP Fintech
Online trading platform named in the complaint; alleged target of coordinated put-option bets before China’s crackdown.
- regulatorSEC
Reportedly investigating the case, adding regulatory overhang.
- courtJudge Arun Subramanian
Manhattan federal judge who signed the asset-freeze order.



