券商板块早盘领涨，香港证券ETF易方达（513090）半日成交额近140亿元，居全市场股票型ETF第一

Group 1 - The index reflects the overall performance of the securities industry within the Hong Kong Stock Connect, including stocks from asset management, custodial banks, investment banks, and brokerage firms [2] - As of the midday close, the index has increased by 5.5% [2] - The index's price-to-book ratio (PB) stands at 1.0 times [2] Group 2 - The valuation metric used for the index is applicable to companies with significant fixed assets and stable book values, or those with strong profitability [4] - The historical price-to-book ratio of the index indicates that the current ratio is higher than the historical average, suggesting a potential overvaluation [4] - The index was first published on July 15, 2013, and has been used to track the performance of the securities sector [4]