沪指低开高走跌0.19%，关注A500ETF易方达（159361）、沪深300ETF易方达（510310）等产品投资机会

Market Overview - The A-share market opened significantly lower but rebounded, with the Shanghai Composite Index closing down by 0.19% [1] - The CSI A500 Index and the CSI 300 Index both fell by 0.5%, while the ChiNext Index dropped by 1.1% [1] - The STAR Market 50 Index increased by 1.4%, and the Hang Seng China Enterprises Index declined by 1.5% [1] Sector Performance - Sectors that performed well included metals, rare earth permanent magnets, photolithography machines, semiconductors, military equipment, banking, and port shipping [1] - Sectors that underperformed included automotive parts, consumer electronics, gaming, weight loss drugs, and liquor [1] - In the Hong Kong market, pharmaceutical and technology stocks weakened, while energy stocks rose [1] Index Performance - The CSI 300 Index consists of 300 large-cap stocks with good liquidity, showing a price-to-earnings ratio of 14.2 times and a valuation percentile of 65.9% since its inception in 2005 [2] - The CSI A500 Index includes 500 stocks with good liquidity, with a price-to-earnings ratio of 16.9 times and a valuation percentile of 73.4% since its inception in 2004 [2] - The ChiNext Index, which tracks 100 large-cap stocks in emerging industries, has a price-to-earnings ratio of 43.8 times and a valuation percentile of 42.6% since its inception in 2010 [2] - The STAR Market 50 Index, consisting of 50 large-cap stocks, has a price-to-earnings ratio of 185.4 times and a valuation percentile of 99.3% since its inception in 2020 [2] - The Hang Seng China Enterprises Index, tracking 50 large-cap stocks listed in Hong Kong, has a price-to-earnings ratio of 10.7 times and a valuation percentile of 65.5% since its inception in 2002 [2]