Market Performance - The CSI A500 index increased by 1.3%, the CSI A100 index rose by 1.1%, and the CSI A50 index grew by 0.6% this week [1][3] - The A500 ETF from E Fund (159361) saw a net inflow of over 500 million yuan this week, bringing its total scale to 17.6 billion yuan [1] Credit Rating - S&P Global Ratings maintained China's sovereign credit rating at "A+" with a stable outlook, reflecting confidence in China's economic resilience and debt management effectiveness [1] Index Composition - The CSI A500 index consists of 500 securities with large market capitalization and good liquidity, covering 91 out of 93 sub-industries [4] - The CSI A100 index includes 100 representative securities, covering 46 sub-industries, reflecting the overall performance of major listed companies [4] - The CSI A50 index comprises the 50 largest stocks from leading companies across 50 sub-industries, highlighting a large-cap style [4] Valuation Metrics - The rolling P/E ratios for the indices are as follows: CSI A500 at 15.4x, CSI A100 at 15.2x, and CSI A50 at 16.9x [3] - The percentile ranks for the rolling P/E ratios indicate that the CSI A500 is at 57.2%, the CSI A100 at 79.4%, and the CSI A50 is not yet analyzed due to insufficient data [3][5] Historical Performance - Year-to-date performance shows the CSI A500 index up by 5.3%, the CSI A100 up by 4.3%, and the CSI A50 up by 2.3% [7] - Over the past year, the CSI A500 index has increased by 25.7%, while the CSI A100 and A50 indices have risen by 22.4% and 22.0%, respectively [7]