Core Viewpoint - The recent decline in the AH premium index, approaching a 10-year low, has raised concerns among investors regarding the significant price differences of the same companies listed in both A-shares and H-shares markets [1][3]. Group 1: AH Premium Performance - The AH premium index has dropped from 134 in May to 117, marking the lowest level since 2018, leading to widespread market confusion about the reasons behind this decline [1][3]. - Historical data indicates that the AH premium does not exhibit a tendency for short-term rapid mean reversion, with average premiums varying significantly over different periods [3][4]. Group 2: Fundamental Reasons for AH Premium - The fundamental reason for the AH premium lies in the differing valuations by investors in the two markets, as there is no sufficient arbitrage mechanism allowing for easy conversion between A-shares and H-shares [4][6]. - The differences in investor structure and trading systems between the two markets contribute to the observed price discrepancies, with foreign capital playing a larger role in the H-share market [6][7]. Group 3: Quantitative Analysis of Factors - The impact of dividend tax on the price difference is estimated to be around 5%, contrary to the common belief of 25%, indicating a more nuanced understanding of the factors affecting the AH premium [7][10]. - A comprehensive analysis suggests that the long-term theoretical center for the AH price difference may be around 26% to 27%, but this is subject to significant variability due to the lack of effective short-term theoretical centers [10][12]. Group 4: Future Outlook on AH Premium - The current trading dynamics suggest that while the AH premium may remain low, it does not guarantee a reversal opportunity, as external factors like the strength of the US dollar and market trends play a crucial role [10][12]. - Predictions indicate that if the US dollar weakens and the Hang Seng Index valuation rises, the AH premium could potentially decline further to below 15% [10][12]. Group 5: Investment Strategy - In investment decisions, it is essential to consider both capital gains and dividend returns, with capital gains being significantly more impactful than dividend yields [11][12]. - The assessment of AH premium trends is critical for stock selection between A-shares and H-shares, as the dividend yield advantage of H-shares may not compensate for capital gains from A-shares if the AH premium expands [12][13].

Group 1 - The core viewpoint is that building a unified market in China is essential for modernizing the economy, and reducing transaction costs is key to achieving this goal [2][5][6] - Transaction costs are identified as the main barrier to market unification, with administrative divisions and local protectionism being significant contributors [2][5][6] - The concept of a unified market is linked to economic efficiency, emphasizing the importance of specialization and division of labor to enhance productivity [4][5] Group 2 - The article highlights that the transition from a planned economy to a market economy has shifted the role of local governments from direct producers to indirect tax collectors, impacting transaction costs [10] - It suggests that the focus of reducing transaction costs should shift from downstream product markets to upstream factor markets in the context of building a unified market [9][10] - The relationship between central and local governments is crucial in addressing transaction costs, as local governments often create barriers that hinder market integration [8][10]