沪指半日涨0.27%，超3500只个股飘红，A500ETF易方达（159361）、沪深300ETF易方达（510310）助力布局A股核心资产

Group 1 - The A-share market showed mixed performance on January 23, with the Shanghai Composite Index rising by 0.27% and over 3,500 stocks in the market gaining [1] - The photovoltaic, satellite internet, and commercial aerospace sectors led the gains, while CPO, GPU, and insurance sectors lagged behind [1] - The Hong Kong stock market opened higher but retreated, with consumer and pharmaceutical stocks performing well, while technology stocks showed mixed results [1] Group 2 - The CSI 500 Index increased by 0.2%, while the CSI 300 Index and the ChiNext Index both decreased by 0.4% and 0.2% respectively [1] - The Shanghai Stock Exchange Science and Technology Innovation Board 50 Index fell by 0.4%, while the Hang Seng China Enterprises Index rose by 0.3% [1] Group 3 - The CSI 300 Index consists of 300 stocks with good liquidity, covering 11 first-level industries, and had a rolling P/E ratio of 14.2 times [3] - The CSI 500 Index, comprising 500 stocks with good liquidity, covers 89 of 93 third-level industries and had a rolling P/E ratio of 17.3 times [3] - The ChiNext Index includes 100 stocks with high liquidity, primarily in strategic emerging industries, and had a rolling P/E ratio of 42.6 times [4]