市场震荡回调，关注A500ETF易方达（159361）、沪深300ETF易方达（510310）等布局机会

Market Overview - A-shares experienced a collective adjustment in the morning session, with the banking, insurance, coal mining, and electric grid equipment sectors leading in gains, while precious metals, robotics, weight loss drugs, wind power equipment, and battery sectors saw declines [1] - The Hang Seng Index showed a mixed performance, with banking and insurance stocks rising, while most technology stocks retreated [1] Index Performance - As of the midday close, the CSI 4500 index fell by 0.7%, the CSI 300 index decreased by 0.4%, the ChiNext index dropped by 1.5%, and the STAR Market 50 index declined by 0.2%. In contrast, the Hang Seng China Enterprises Index rose by 0.2% [1] - The CSI 300 index consists of 300 stocks with good liquidity and large market capitalization, covering 11 primary industry sectors, with a rolling P/E ratio of 14.2 times [3] - The CSI A500 index, which includes 500 securities from various industries, covers 91 out of 93 tertiary industries, with a rolling P/E ratio of 14.2 times and an increase of 0.7% [3] - The ChiNext index, composed of 100 stocks with high market capitalization and liquidity, has a rolling P/E ratio of 41.2 times and decreased by 1.5% [3] - The STAR Market 50 index, featuring 50 stocks with significant liquidity, has a rolling P/E ratio of 159.3 times and fell by 0.2% [4] - The Hang Seng China Enterprises Index, which tracks 50 large-cap and actively traded stocks listed in Hong Kong, has a rolling P/E ratio of 10.6 times and increased by 0.2% [4]