Mainland Investors Sell Hong Kong Stocks for First Time in Three Years

For nearly three years, mainland Chinese money flowed into Hong Kong equities with remarkable consistency. That streak has broken.

In May, mainland investors recorded a net sell-off of approximately HK$3.55 billion through the Southbound Stock Connect programs. This marks the first monthly net outflow since June 2023, following a first quarter that saw more than HK$220 billion pour into Hong Kong stocks.

Regulatory squeeze

The shift follows the China Securities Regulatory Commission's crackdown on three major offshore brokers, including Futu and Tiger Brokers. The new rules bar these platforms from facilitating new stock purchases, instituting a two-year transition period during which clients can only sell existing holdings or withdraw funds. These platforms had become go-to channels for mainland retail investors accessing Hong Kong and US markets.

Market implications

By late 2025, southbound trading accounted for roughly 23% of total Hong Kong equity turnover. When that flow reverses, even modestly, it thins the order book. Hong Kong's mid-cap and small-cap segments are particularly vulnerable. The CSRC's action may be a one-off enforcement or the opening move in a broader campaign to redirect cross-border investment through state-approved channels.