Haiguang Xinzheng (海光芯正) jumped nearly 40 percent in late Hong Kong trading on Sept. 8 after Stock Connect inclusion effective Sept. 7 opened the shares to mainland Chinese investors, with turnover reaching nearly HK$400 million. The surge reflects initial demand from newly accessible southbound capital following the stock's addition to the eligible securities list.
A late-session buying frenzy pushed Haiguang Xinzheng (海光芯正) up nearly 40 percent on Sept. 8, one day after the Hong Kong-listed stock became tradable by mainland Chinese investors through the Stock Connect program.
Turnover reached nearly HK$400 million as southbound buying accelerated through the afternoon session. The stock was added to the eligible securities list under the Stock Connect program effective Sept. 7, according to exchange announcements.
The inclusion follows a broader wave of Stock Connect additions effective the same date. Baidu (9888.HK) and Ascletis Pharma (1672.HK) both announced their inclusion in the Shanghai-Hong Kong and Shenzhen-Hong Kong Stock Connect programs on Sept. 7, expanding mainland investor access to their Hong Kong-listed shares. For Baidu, the inclusion followed its conversion from a secondary listing to a dual-primary listing on the Hong Kong Stock Exchange in August, a prerequisite for Stock Connect eligibility.
Historical data from comparable Chinese tech firms that entered Stock Connect after dual-primary listing conversions shows a 15-20 percent average increase in southbound shareholding within 30 days of inclusion, according to Crypto Briefing's analysis of prior inclusions. Alibaba (9988.HK) received similar southbound trading access in September 2024, providing a reference point for how mainland capital flows can reshape a stock's trading profile.
For Haiguang Xinzheng, the inclusion represents a structural shift in its shareholder base. Mainland investors now have a direct channel to trade the stock, potentially diversifying ownership beyond the current Hong Kong and international investor pool. The near-40 percent single-day surge reflects the initial demand shock from newly accessible capital, though moves of this magnitude carry pullback risk as early buyers take profits.
The stock's eligibility will be reviewed periodically by the exchanges, and maintaining inclusion requires meeting ongoing market capitalization and liquidity thresholds. Whether the initial surge translates into sustained southbound accumulation will depend on the stock's fundamentals and trading profile in the weeks ahead. Stock Connect inclusion, while positive for liquidity, does not fundamentally alter earnings projections for the company.
This article is for informational purposes only and does not constitute investment advice.
