FICC日报：权重托底，上证50反弹-20251017

Report Summary 1. Report Industry Investment Rating No relevant content provided. 2. Core Views - The Sino-US relationship is currently in a stage of game, and attention should be paid to the leaders' meeting at the end of the month. The market is supported by funds actively propping up heavyweight stocks, leading to a rebound in the broader market index. In the short term, the trends of large and small-cap indexes are differentiated, and the small and medium-cap indexes may continue to fluctuate and digest [1][2]. 3. Summary by Directory Market Analysis - Regarding the Sino-US relationship, the Chinese Ministry of Commerce responded to multiple hot issues, expressing an open attitude towards equal consultations on the basis of mutual respect. The US Treasury Secretary mentioned possible extensions of tariff exemptions and a potential meeting between leaders. In the spot market, A-share indexes closed in the red, with the Shanghai Composite Index up 0.10% to 3916.23 points and the ChiNext Index up 0.38%. The trading volume in the Shanghai and Shenzhen markets dropped below 2 trillion yuan to 1.93 trillion yuan. Overseas, the three major US stock indexes closed down, with the Dow Jones Industrial Average down 0.65% to 45952.24 points. In the futures market, the basis of the current-month contract converged upon expiration, and the trading volume and open interest of the IH contract increased [1]. Strategy - The Sino-US relationship is in a game stage, and attention should be paid to the leaders' meeting at the end of the month. In the market, funds are actively supporting heavyweight stocks, driving the broader market index to rebound. In the short term, the trends of large and small-cap indexes are differentiated, and the small and medium-cap indexes may continue to fluctuate and digest [2]. Macro - Economic Charts - The report includes charts showing the relationship between the US dollar index and A-share trends, US Treasury yields and A-share trends, RMB exchange rate and A-share trends, US Treasury yields and A-share style trends [5][10]. Spot Market Tracking Charts - The daily performance of major domestic stock indexes on October 16, 2025, shows that the Shanghai Composite Index rose 0.10%, the Shenzhen Component Index fell 0.25%, the ChiNext Index rose 0.38%, the CSI 300 Index rose 0.26%, the SSE 50 Index rose 0.59%, the CSI 500 Index fell 0.86%, and the CSI 1000 Index fell 1.09%. There are also charts on the trading volume of the Shanghai and Shenzhen markets and the margin trading balance [12]. Futures Market Tracking Charts - The trading volume and open interest data of IF, IH, IC, and IM contracts are provided. For example, the trading volume of the IH contract increased by 5009, and the open interest increased by 6373. The basis data of different contracts in different periods (current month, next month, current quarter, and next quarter) are also presented, as well as the inter - period spreads between different contracts [16][38].