Inside Hong Kong’s $274 Billion Lock-Up Test: AI Weakness Meets a Record Supply Wave

Hong Kong's stock market is bracing for a historic liquidity test. Over the next 12 months, an estimated US$274 billion ($2.13 trillion HKD) in shares will be freed from post-IPO lock-up restrictions —a direct consequence of the city’s record-breaking fundraising boom in 2025, where total proceeds surged 218% year-over-year . While the unlocking itself is a mechanical event, its impact is being dangerously amplified by a structural shift: global and mainland Chinese capital is rotating out of Hong Kong and into markets with stronger, more direct AI exposure .

The Numbers Behind the Supply Shock

The precise scale of the lock-up wave varies by data provider. Wind data points to a total unlock volume of HK$1.55 trillion, almost triple the 2025 volume . Other estimates, like LiveReport, place it around HK$780 billion when focusing narrowly on cornerstone and pre-IPO investors , while Goldman Sachs' more expansive analysis estimates the potential new supply at US$274 billion—a record for any rolling 12-month period .

The pressure will not be evenly distributed. The single largest peak is set for July 2026, when at least HK$255 billion (US$32.5 billion) worth of stock will become tradable . September is projected to have the year's highest total volume, with over HK$410 billion in shares potentially entering the market . Key individual expiries include AI firm MiniMax in July, Chery Auto in September, and Zijin Gold International across several dates .

The AI Rot: Why Hong Kong Is Getting Left Behind

The supply wave is hitting a market already weakened by a thematic defection. While the Hang Seng Tech Index has fallen over 2% on pre-positioning, mainland China's ChiNext board has surged over 25% this year . Goldman Sachs cut H-shares from overweight to market-weight in early June, bluntly citing the "opportunity cost" of missing AI-linked growth .

Hong Kong’s technology exposure remains dominated by internet platforms like Meituan and Baidu, which benefit less directly from the AI infrastructure buildout compared to the semiconductor-heavy markets of Taiwan, Korea, and mainland China . This composition weakness is compounded by declining profits from price wars in domestic consumer sectors . The flow of funds has reversed sharply: Chinese investors are pulling record sums back onshore to capture growth from AI chipmakers like Moore Threads Technology .

A Historically Bearish Signal, with Wide Dispersion

Goldman Sachs’ historical analysis provides a useful, if imperfect, guide. Within three to six months after lock-up expiry, share prices typically decline by an average of 4% to 7% . However, the dispersion is wide. The bank notes that recent post-expiry performance has depended less on broad market sentiment and more on the proportion of unlocked shares relative to total shares outstanding, as well as the stock’s pre-expiry free float and price momentum .

This means there won’t be a single, systemic sell-off. Instead, investors should expect a series of stock-specific liquidity events concentrated in the July-to-September window. Companies with a high ratio of unlocking shares to existing free float are the most vulnerable to technical selling by early-stage and cornerstone investors who are purely seeking liquidity.

Buffers Against the Deluge

Several mechanisms could absorb some of the selling pressure, preventing a full-scale market dislocation:

• Passive Inflows and Index Rebalancing: Substantial passive demand from index funds—linked to the inclusion of new, large-cap stocks in the Hang Seng Index—acts as a natural buyer of freed shares .
• Share Buybacks: Corporations are expected to use buyback programs to support stock prices during their specific unlock periods, creating a floor for some companies .
• A New AI Pipeline: The narrative may slowly shift. In 2026, over 85% of Chinese AI-related companies (23 of 27) that went public chose Hong Kong’s exchange, partly driven by US outbound investment restrictions . This provides a future pipeline, but it is a structural fix that will take quarters to materialize.
• Southbound Flows and Foreign Capital: Goldman Sachs also points to continued southbound capital flows and returning foreign capital as significant liquidity buffers that could mitigate selling pressure .

How to Navigate the Next Six Months

For investors, this environment demands a shift from a top-down, index-level strategy to a highly selective, bottom-up approach. The key risk is not the lock-up wave itself, but a negative feedback loop: technical lock-up selling causes price weakness, which then triggers further outflows from growth investors frustrated by the lack of AI exposure—leading to sustained underperformance in Hong Kong relative to mainland A-shares .

The most acute risk period is July through September 2026. During these months, investors should watch for:

1. Unlock Ratios: Stocks where the value of unlocking shares is a high percentage of the average daily trading volume.
2. Pre-Expiry Momentum: Companies with negative price momentum before the unlock are at higher risk of a post-expiry decline .
3. Fundamental Insulation: The safest plays will be companies whose unlock events are largely technical—selling by venture capital or pre-IPO investors—but whose underlying earnings and sectoral positioning are on the right side of the AI divergence.

While the US$274 billion overhang is a formidable challenge, it also creates a valuation washout. For long-term investors, this period could offer entry points into fundamentally sound companies whose stock is temporarily impaired by a mechanical, rather than fundamental, supply event.