春季躁动期间周期板块胜率较高，聚焦石化ETF（159731）布局价值

Group 1 - The core viewpoint of the article highlights the positive performance of the petrochemical sector, with specific stocks leading the gains and significant net inflows into related ETFs [1] - The Huatai Securities report indicates that the "spring rally" is a notable calendar effect in A-shares, driven by improved fundamental expectations, macro liquidity, and policy catalysts, suggesting a higher elasticity in market performance when multiple factors resonate [1] - The petrochemical ETF (159731) and its linked funds closely track the CSI Petrochemical Industry Index, with the basic chemical industry accounting for 60.39% and the oil and petrochemical industry for 32.71% of the index [1] Group 2 - The article notes that the new round of capacity expansion in the petrochemical industry is nearing its end, leading to a rebalancing of supply and demand, with expectations of gradual recovery in industry prosperity [1]