指数震荡调整，阶段性波动或将提供布局良机，关注A500ETF易方达（159361）等产品投资价值

Group 1 - The core viewpoint of the article indicates that the current market trend is in the mid-to-late stage of an upward movement, with potential for further growth as the fundamental conditions improve and retail investment increases, suggesting a favorable outlook for the A-share market in 2026 [1][4] - The A500 ETF managed by E Fund has a current scale exceeding 33 billion yuan, with a tracking error of only 0.34 percentage points for 2025 and an excess return of 2.86 percentage points, ranking first among similar products with over 10 billion yuan in scale [1][3] - The A100 ETF and A50 ETF also track their respective indices, with the A100 ETF covering 100 securities and the A50 ETF covering the largest 50 stocks, reflecting the overall performance of major listed companies in their sectors [3] Group 2 - The A500 index consists of 500 securities with large market capitalization and good liquidity, covering 89 out of 93 sub-industries [3] - The A100 index includes 100 representative securities from various industries, covering 46 sub-industries, while the A50 index is composed of the largest 50 stocks across 50 sub-industries, highlighting a balanced distribution among major sectors [3] - The current rolling price-to-earnings ratios for the A500, A100, and A50 indices are 17.6, 17.8, and 18.6 respectively, indicating the valuation levels of these indices [3]