大盘回调，沪指仍维持3900点，关注A500ETF易方达（159361）、沪深300ETF易方达（510310）等配置价值

Market Overview - The A-share market experienced a collective decline across the three major indices, with the Shanghai Composite Index remaining above 3900 points [1] - The CSI 600 index fell by 1.6%, the CSI 300 index decreased by 1.3%, the ChiNext index dropped by 3.4%, and the STAR Market 50 index declined by 4.6% [1] - The Hang Seng China Enterprises Index decreased by 1.2% [1] Sector Performance - Sectors showing gains included gas, textile manufacturing, electric grid equipment, and coal [1] - Popular sectors such as precious metals, solid-state batteries, photovoltaic equipment, and computing hardware saw declines [1] - In the Hong Kong market, the entertainment and beverage sectors performed well, while the metals and mining sectors faced losses [1] Index Details - The CSI 300 index consists of 300 stocks with good liquidity and large market capitalization, covering 11 primary industries, with a rolling P/E ratio of 14.4 times [3] - The CSI 500 index includes 500 stocks from various industries, covering 91 out of 93 tertiary industries, with a rolling P/E ratio of 17.1 times [3] - The ChiNext index is composed of 100 stocks with high market capitalization and liquidity, primarily in strategic emerging industries, with a rolling P/E ratio of 45.8 times [3] - The STAR Market 50 index includes 50 stocks with significant market capitalization and liquidity, heavily weighted towards "hard technology," particularly semiconductors, with a rolling P/E ratio of 197.0 times [3] - The Hang Seng China Enterprises Index includes 50 large-cap, actively traded stocks from mainland China listed in Hong Kong, with a rolling P/E ratio of 10.9 times [3]