核心大盘宽基指数集体上涨，关注A500ETF易方达（159361）、沪深300ETF易方达（510310）投资价值

Market Overview - A-shares showed mixed performance in early trading, with total market turnover reaching 1.26 trillion yuan, an increase of nearly 100 billion yuan compared to the previous day [1] - The major indices saw the following changes at midday: the CSI 500 index rose by 0.4%, the CSI 300 index increased by 0.2%, the ChiNext index gained 0.6%, and the STAR Market 50 index was up by 0.7% [1] - The Hang Seng Index opened higher and continued to rise, with technology stocks leading the gains, and the Hang Seng China Enterprises Index up by 1.2% at midday [1] Index Performance - The CSI 300 index consists of 300 stocks from the Shanghai and Shenzhen markets, covering 11 primary industry sectors, with a rolling P/E ratio of 13.9 times [3] - The CSI 500 index includes 500 stocks with larger market capitalization and liquidity, covering 91 out of 93 tertiary industry sectors, with a rolling P/E ratio of 16.4 times [3] - The ChiNext index is composed of 100 stocks from the ChiNext board, with a significant representation from strategic emerging industries, particularly in power equipment, communication, and electronics, which together account for nearly 60% [3]