China's New Broker Rules Cut Into Moomoo, Futu, and Tiger's Cash in the Register

China's crackdown looks more like a revenue shock than a one-off fine

China's latest crackdown has hit Moomoo and Tiger Brokers hard, with shares losing more than 30 per cent in pre-market trading after Beijing introduced its toughest measures yet against offshore trading platforms. The market's reaction suggests investors are worried not just about penalties, but about a meaningful squeeze on future revenue.

Under the new rules, mainland clients can still sell holdings and withdraw funds, but they can no longer buy new securities or transfer money into accounts. That means brokers may still earn from cash already in customer accounts, while new deposits and trading activity dry up. For a platform business, that is the core risk: lower activity can mean lower revenue, even before any fine or confiscation is counted.

Supporters of the stocks argue this is a restriction on mainland activity, not a collapse of the whole group, since the Singapore-based arms remain separately licensed. But critics say the bigger threat comes if regulators move against profits they made from mainland users. In that scenario, the damage would hit both ongoing revenue and balance-sheet strength at the same time.