A500指数本周涨0.8%，机构称春季行情有望延续，A500ETF易方达（159361）助力布局A股核心资产

Group 1 - The core viewpoint of the article indicates that the recent A-share spring market is undergoing a phase adjustment, primarily driven by internal factors with external factors acting as catalysts. However, external disturbances have not caused substantial impacts on China's industrial fundamentals, and the concentrated cooling operations have ended, suggesting that market sentiment has been fully released. A continuation of the spring market after the Spring Festival is anticipated, and holding stocks during the holiday is recommended [1][3]. Group 2 - The weekly performance of the indices shows that the CSI A500 index increased by 0.8%, the CSI A100 index rose by 0.5%, while the CSI A50 index decreased by 0.4% [1][3]. - The rolling price-to-earnings (P/E) ratios for the indices are as follows: CSI A500 at 17.4 times, CSI A100 at 17.6 times, and CSI A50 at 18.3 times [3]. - The CSI A500 index consists of 500 securities with large market capitalization and good liquidity, covering 89 of the 93 three-level industries. The CSI A100 index includes 100 representative securities, covering 46 three-level industries, while the CSI A50 index comprises the 50 largest stocks from leading companies across 50 industries [4].