The Hong Kong IPO market is currently experiencing a significant surge. This year alone, over 60 companies have completed listings, with average returns far exceeding historical norms. However, in this heated environment, identifying which new listings can sustain outperformance and how to navigate the selling pressure from post-lockup expiries are critical questions for every market participant.
Research from Goldman Sachs analysts, including Kevin Wang, published a report on June 14th titled "Capturing Alpha in HK IPOs," which examines the return patterns, lockup expiry risks, and index inclusion opportunities in the Hong Kong IPO market. Data shows that since 2025, the average first-day gain for new Hong Kong listings is 45%, rising to 49% after one month and reaching 67% after three months. However, performance diverges dramatically—the best performer surged over 10 times within six months, while the weakest declined by 74%. Five key characteristics are identified as core signals for market outperformance: large market capitalization, standalone Hong Kong listing, high retail oversubscription, cornerstone holdings between 30%-50%, and high-growth "new economy" status.
Over the next 12 months, approximately $274 billion worth of shares currently under lockup agreements are scheduled to be released. Historical data indicates a median share price decline of 4% three months post-unlock and a 7% decline after six months.
Speed Does Not Equal Stability: Five Key Variables Determining Post-IPO Performance
For companies newly listed on the Hong Kong Main Board since 2025, the average gains are impressive: 45% on day one, 49% after one month, and 67% after three months. Yet, the dispersion is extreme, with the top performer gaining over 10x in six months and the worst losing 74%.
What determines this divergence? A multi-factor regression analysis of Hong Kong listings since September 2024 identifies five statistically significant variables:
1. Market Cap and Listing Structure: Larger companies conducting a standalone listing in Hong Kong systematically outperform smaller companies and those conducting simultaneous A+H listings. A dual listing implies pricing has already been fully contested in the A-share market, leaving limited room for premium in Hong Kong.
2. Cornerstone Investor Holdings: A holding ratio between 30% and 50% represents a "sweet spot"—providing institutional endorsement without overly restricting liquidity due to a small free float. Holdings exceeding 52% can actually suppress post-listing trading activity and performance.
3. Retail Oversubscription Multiple: Higher oversubscription correlates with stronger first-week gains. However, this effect is transient, with momentum fading quickly as initial enthusiasm wanes.
4. New Economy vs. Traditional Sectors: High-growth new economy companies (in tech, biopharma, AI) significantly outperform traditional sectors post-listing. The key insight: even unprofitable companies can be well-received by the market if their revenue growth is sufficiently high.
5. Valuation is Not a Primary Driver: The price-to-sales (P/S) ratio at listing does not significantly impact subsequent performance. In other words, expensive doesn't guarantee a fall, and cheap doesn't guarantee a rise—growth expectations are the core pricing factor.
An additional "spillover effect" is noteworthy: when a new company lists in a specific sector, existing stocks in the same sector often outperform the broader market in the following week. This is particularly evident in healthcare and technology. Similar patterns are observed in Hong Kong stocks following large US IPOs in the same industry.
Can the Market Absorb the $274 Billion Unlock Pressure?
This represents one of the largest potential risks currently facing the Hong Kong market.
The estimated $274 billion in shares set to be unlocked over the next year accounts for approximately 4.4% of Hong Kong's total market capitalization. This record-high volume stems from low public float percentages at IPO, coupled with substantial post-listing gains, which have inflated the locked-up share value.
Historical data shows a median price decline post-unlock, but individual stock performance varies widely.
The determinants of post-unlock performance operate in two phases:
Short-term (First week post-unlock): The proportion of unlocked shares relative to total share capital is the most critical variable—a larger release typically leads to heavier short-term selling pressure.
Medium-term (3-6 months post-unlock): The post-unlock free float ratio and the stock's cumulative gain prior to the unlock are the main drivers. The greater the pre-unlock rally, the stronger the profit-taking pressure afterward.
Additionally, companies with high holdings by domestic cornerstone investors often face greater selling pressure upon unlock.
Can the market digest this potential $274 billion supply? Estimates suggest potential demand for Hong Kong equity assets could exceed $400 billion, sourced from: corporate dividends and buybacks (~$180 billion), reallocation by global long-term institutional funds ($200-300 billion), potential southbound inflows (~$200 billion), and retail buying. This provides a buffer between supply and demand, but it does not guarantee every stock will navigate the unlock period unscathed.
Index Inclusion and Stock Connect: Two Cards to Counter Unlock Pressure
The unlock pressure is not insurmountable. For eligible newly listed companies, inclusion in major indices and the Hong Kong Stock Connect scheme are two structural catalysts that can consistently introduce incremental capital.
Regarding Index Inclusion:
Both MSCI and the Hang Seng Index offer "fast entry" channels. New listings meeting market cap and liquidity thresholds can be considered for inclusion in as few as 10 trading days. Currently, passive assets tracking MSCI indexes that include Chinese stocks total approximately $134 billion. The tracking assets for the Hang Seng Index (HSI) and the Hang Seng Tech Index (HSTECH) are about $28 billion and $24 billion, respectively. Upon inclusion, passive fund buying is systematic and sustained.
Historical data shows that price reactions around HSI and HSTECH constituent changes (additions/removals) are significantly stronger than for the Hang Seng China Enterprises Index (HSCEI).
Regarding Stock Connect:
Secondary-listed companies are typically ineligible for the Stock Connect. However, companies with a primary listing in Hong Kong that meet the market cap and liquidity requirements can be included. Historical data indicates that after inclusion, southbound holdings as a percentage of shares typically rise by an average of 1 percentage point in the first two days and accumulate a 5 percentage point increase over three months, with buying momentum lasting for months. Since 2025, new Hong Kong listings have attracted cumulative net southbound buying of approximately $10 billion.
Three Screening Approaches for Investor Consideration
Based on this framework, Goldman Sachs identifies three categories of stocks for investors to monitor:
Approach 1: New Listings with Potential for Sustained Outperformance
Screening Criteria: Listed this year, cornerstone holdings between 30%-50%, revenue growth exceeding 20%, market cap over $1 billion. This screen yields 13 stocks, with average cornerstone holdings of 44%, an average oversubscription multiple of 2628x, and average expected revenue growth of 85%.
Approach 2: Stocks Facing Significant Unlock Pressure
Screening Criteria: Unlock volume over the next 12 months exceeding 30% of total shares, post-listing gain over 50%, market cap over $1 billion. This screen yields 40 stocks, with an average unlock ratio of 73% and an average post-listing gain of 175%.
Approach 3: Potential Stock Connect Inclusion Candidates
Screening Criteria: Listed within the past year, market cap exceeding the Stock Connect inclusion threshold (HK$5 billion), not yet included. This screen yields 34 stocks, with an average market cap of HK$17.9 billion.
For fundamentally sound new listings, a viable strategy could involve holding initially, closely monitoring the unlock window, and then systematically adding to positions after the majority of shares are unlocked, the free float has sufficiently expanded, and the stock is included in the Stock Connect.
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