化工迎政策窗口期，推动能源期货普涨；化工指数录得4连阳，资金连续4日加仓化工行业ETF易方达（516570）

Group 1 - The China Petroleum and Chemical Industry Index (H11057) rose by 1.88%, marking a four-day winning streak, with significant gains from major stocks such as China Petroleum up 1.5% and China Petrochemical up 4.19% [1] - The E Fund Chemical Industry ETF (516570), which tracks the China Petroleum and Chemical Industry Index, has seen a net inflow of over 64 million in the last four days and nearly 200 million in the past 60 days, indicating strong investor interest [1] - The Ministry of Finance announced the cancellation of export tax rebates for 249 chemical products starting April 1, prompting overseas customers to place concentrated orders in the first quarter, benefiting the chemical sector [3] Group 2 - Energy and chemical futures experienced a broad increase, with butadiene rubber and ethylene glycol both rising over 4%, while pure benzene and asphalt increased by more than 2% [3] - According to GF Securities, the chemical industry is a typical cyclical sector that usually follows a five-year cycle, and the current phase is seen as a "dawn" period for the industry, supported by factors such as negative capital expenditure growth and improved demand expectations [3] - The E Fund Chemical Industry ETF offers a low-cost investment opportunity in traditional energy sectors, with a combined management and custody fee of only 0.2% per year [4]