盘点近十年数据，沪深300有明显的节后上涨效应

Core Insights - The article highlights the "Spring Festival Effect" observed in the CSI 300 Index over the past decade, indicating a neutral performance before the festival and a significant upward trend afterward [1] Group 1: Pre-Festival Performance - In the ten years analyzed, the CSI 300 Index experienced an increase in five years and a decrease in five years before the Spring Festival, with an average change of -0.145%, suggesting a relatively neutral performance [1] Group 2: Post-Festival Performance - After the Spring Festival, the CSI 300 Index showed a positive trend, with seven years of increases and three years of decreases, resulting in an average increase of 1.952%, indicating a clear post-festival upward effect [1] Group 3: Future Outlook - The article suggests that the release of selling pressure before the festival in 2026 will facilitate a smoother start after the festival, with upcoming political and economic catalysts such as the National People's Congress and the implementation of the "14th Five-Year Plan" likely to enhance the chances of a strong post-festival performance in the A-share market [1] Group 4: ETF Insights - There are currently 30 ETFs tracking the CSI 300 Index, with the lowest management fee being 0.15% per year for the Huaxia CSI 300 ETF (510330.SH) [1]