港股通的交易规则有哪些要点？

Core Viewpoint - The article discusses the key rules and mechanisms of the Hong Kong Stock Connect, emphasizing its importance for mainland investors to participate in the Hong Kong stock market while ensuring compliance and market order [1][2]. Group 1: Trading Rules - The trading targets of the Hong Kong Stock Connect are determined by the Hong Kong Stock Exchange and mainland exchanges, including large and medium-cap stocks from the Hang Seng Index and H-shares meeting specific market capitalization requirements [1]. - The trading range is subject to dynamic adjustments based on market conditions, highlighting the need for investors to stay informed about the latest eligible stocks [1]. Group 2: Trading Hours and Mechanisms - Trading days for the Hong Kong Stock Connect must coincide with trading days in both mainland and Hong Kong markets, with specific trading hours aligned with the Hong Kong Stock Exchange [2]. - The trading mechanism operates on a T+0 basis, allowing investors to sell stocks purchased on the same day, while funds settle on a T+2 basis [2]. - There are no price limits on stocks traded through the Hong Kong Stock Connect, with price fluctuations determined by market supply and demand [2]. Group 3: Transaction Costs - Transaction costs for the Hong Kong Stock Connect include commissions, stamp duty, transaction fees, and transfer fees, with specific rates determined by regulatory authorities [3]. - Investors are advised to understand the detailed fee structure before engaging in trading to avoid misunderstandings related to costs [3].