大盘高开低走，关注A500ETF易方达（159361）、沪深300ETF易方达（510310）等投资价值

Market Overview - The A-share market opened high but closed lower, with the Shanghai Composite Index rising by 0.2% at midday. The sectors showing gains included cultivated diamonds, insurance, liquor, coal, photovoltaic equipment, banking, and precious metals, while sectors such as photolithography machines, semiconductors, CPO, PEEK materials, and consumer electronics saw declines [1] - The Hong Kong stock market experienced fluctuations, with the entertainment and home goods sectors performing well, while biotechnology and semiconductor products and equipment sectors faced declines. As of the midday close, the CSI A500 index fell by 0.5%, the CSI 300 index decreased by 0.1%, the ChiNext index dropped by 2.2%, and the STAR Market 50 index declined by 2.8%. The Hang Seng China Enterprises Index increased by 0.1% [1] Index Performance - The CSI 300 index, which consists of 300 large-cap stocks from the A-share market, recorded a decline of 0.1% at midday, with a rolling P/E ratio of 14.2 times [3] - The CSI A500 index, comprising 500 mid-cap stocks, fell by 0.5% at midday, with a rolling P/E ratio of 16.8 times [3] - The ChiNext index, which includes 100 large-cap stocks from the ChiNext board, decreased by 2.2% at midday, with a rolling P/E ratio of 43.3 times [4] - The STAR Market 50 index, consisting of 50 large-cap stocks from the STAR Market, showed a decline, but specific performance data was not provided [4] - The Hang Seng China Enterprises Index, tracking 50 large-cap Chinese companies listed in Hong Kong, increased by 0.1% at midday, with a rolling P/E ratio of 10.6 times [6]