股指周报（IF&IH&IC&IM)：关税摩擦扰动市场，股指下跌-20251020

Report Industry Investment Rating No relevant content provided. Core Viewpoints of the Report - Exports have performed better than expected. From January to September 2025, China's exports in RMB terms increased by 7.1% year-on-year, with a year-on-year growth rate of 8.4% in September, driven by the base effect and the strong performance of mechanical and electrical products [3]. - In September, the year-on-year declines in CPI and PPI both narrowed. The CPI decreased by 0.3% year-on-year, slightly up from -0.4% last month but still lower than the market expectation of -0.1%. The PPI was -2.3%, narrowing by 0.6 percentage points from last month [3]. - The growth rate of social financing has declined, but household deposits have become more active. At the end of September 2025, the stock of social financing scale was 437.08 trillion yuan, a year-on-year increase of 8.7%, 0.1 percentage point lower than the previous value. The acceleration of government bond issuance is the main factor supporting the high growth rate of social financing stock [3]. - Short - term policy expectations remain. From October 20 - 23, the Fourth Plenary Session of the 20th Central Committee of the Communist Party of China will be held to study suggestions on formulating the 15th Five - Year Plan for National Economic and Social Development, analyze and study the current economic situation, and deploy economic work for the second half of the year [3]. - Sino - US tariff policies have escalated, and the Sino - US equity markets have been severely hit. Since early October, the US has introduced a series of restrictive measures against China, and China has taken counter - measures [3]. - The market trading volume shrank last week. The daily trading volumes of A - shares last week were 21038 billion yuan, 23147 billion yuan, 18835 billion yuan, 17526 billion yuan, and 17598 billion yuan respectively, with the average daily trading volume decreasing by 1132.1 billion yuan compared to the previous week [3]. - In the short term, due to the uncertainty of Sino - US economic and trade policies, market risk appetite may fluctuate. As the adverse factors of trade frictions gradually ease, the stock index is expected to return to the upward channel. It is advisable to focus on risk avoidance in the short term, and the large - cap style may be more resilient. Stock index futures long investors can consider using options tools for risk hedging [3]. Summary by Sections 1. Stock Index Market Review - Last week, the CSI 300 fell 2.22% to 4514.2; the SSE 50 fell 0.24% to 2967.8; the CSI 500 fell 5.17% to 7016.1; the CSI 1000 fell 4.62% to 7185.5 [5]. - Among the Shenwan primary industry indices, only the banking (4.9%), food and beverage (0.9%), and transportation (0.4%) sectors rose last week, while the electronics (-7.1%), media (-6.3%), and other sectors led the decline [7]. - As of October 17, the monthly contracts expired. The annualized discounts of the next - month contracts IF2511, IH2511, IC2511, and IM2511 were 5.32%, 1.57%, 17.4%, and 15.51% respectively [11]. - The spread between the CSI 300 and the SSE 50 was at the 94.1% historical quantile level; the spread between the CSI 1000 and the CSI 500 was at the 34.7% historical quantile level [15]. 2. Stock Index Influencing Factors - Liquidity - This week, the central bank conducted 6331 billion yuan of reverse repurchase operations and 6000 billion yuan of 182 - day outright reverse repurchase operations in the open market. After deducting the maturity amount, a net回笼 (including treasury cash) of 6979 billion yuan was achieved this week. Next week, 7891 billion yuan of reverse repurchases will expire [20]. - As of October 16, the margin trading balance of A - shares was 24496.3 billion yuan, an increase of 153.3 billion yuan from the previous week. The proportion of margin - buying amount to the total market trading volume was 12.3%, at the 98.1% quantile level in the past decade [26]. 3. Stock Index Influencing Factors - Economic Fundamentals and Corporate Earnings - In September 2025, the manufacturing PMI was 49.8, up 0.4 from August; the new order index was 49.7, up 0.2; the new export order index was 47.8, up 0.6 [36]. - The year - on - year growth rates of the net profit attributable to the parent company of the CSI 300 in Q2 2025, Q1 2025, and Q4 2024 were 2.49%, 3.32%, and 2.78% respectively; the ROE (TTM) was 9.71%, 9.75%, and 10.09% respectively [40]. 4. Stock Index Influencing Factors - Policy Driven - In September, the Ministry of Commerce stated that relevant departments had introduced more than 30 policies to establish a "1 + N" policy system for service consumption and would introduce a series of targeted documents [45]. - From September 1, 2025, to August 31, 2026, residents using personal consumption loans for consumption can enjoy an interest - subsidy policy, with a subsidy ratio of 1 percentage point [47]. 5. Stock Index Influencing Factors - Overseas Factors - In September 2025, the US manufacturing PMI was 49.1%, up 0.4 percentage points from the previous value; the non - manufacturing PMI was 50%, down 2 percentage points from the previous value [55]. - In August 2025, the US PCE increased by 2.74% year - on - year, and the core PCE increased by 2.91% year - on - year; the CPI increased by 2.9% year - on - year, and the core CPI increased by 3.1% year - on - year [61]. - Trump has proposed a series of tariff increase measures against China, and China has taken corresponding counter - measures [63][65].