1. Report Industry Investment Rating - No relevant content provided 2. Core Views of the Report - Global natural rubber producing areas are in the tapping season. In Yunnan, rainy weather persists, leading to a tight supply of raw materials and firm purchase prices. In Hainan, precipitation disrupts the tapping operations, resulting in limited fresh latex output. Local rubber processing plants face difficulties in raw material procurement [2]. - The total spot inventory at Qingdao ports continues to decline, with bonded warehouses accumulating inventory and general trade warehouses showing further de - stocking. Overseas arrivals are increasing, but tire manufacturers' purchasing enthusiasm has weakened, and most are focused on inventory digestion [2]. - Last week, the domestic tire capacity utilization rate fluctuated slightly. Some semi - steel tire enterprises had maintenance schedules, dragging down the overall capacity utilization rate. The resumption of work at full - steel tire maintenance enterprises drove up the full - steel tire capacity utilization rate. There is still room for a slight increase in capacity utilization as maintenance - affected enterprises resume work, but overall orders are average, and production control by enterprises will continue to limit the increase [2]. - The ru2601 contract is expected to fluctuate in the range of 15,600 - 16,200 in the short term, and the nr2510 contract is expected to fluctuate in the range of 12,600 - 13,000 in the short term [2]. 3. Summary by Related Catalogs 3.1 Futures Market - The closing price of the main Shanghai rubber contract is 15,875 yuan/ton, up 55 yuan; the closing price of the main 20 - number rubber contract is 12,690 yuan/ton, up 40 yuan [2]. - The 9 - 1 spread of Shanghai rubber is - 995 yuan/ton, up 40 yuan; the 9 - 10 spread of 20 - number rubber is - 60 yuan/ton, up 15 yuan [2]. - The spread between Shanghai rubber and 20 - number rubber is 3,185 yuan/ton, up 15 yuan. The trading volume of the main Shanghai rubber contract is 134,968 lots, up 1,513 lots; the trading volume of the main 20 - number rubber contract is 58,095 lots, down 399 lots [2]. - The net position of the top 20 in Shanghai rubber is - 38,237 lots, down 1,112 lots; the net position of the top 20 in 20 - number rubber is - 6,844 lots, up 1,087 lots [2]. - The exchange warehouse receipts of Shanghai rubber are 179,570 tons, down 20 tons; the exchange warehouse receipts of 20 - number rubber are 46,469 tons, unchanged [2]. 3.2 Spot Market - The price of state - owned whole latex in the Shanghai market is 14,850 yuan/ton, down 50 yuan; the price of Thai standard STR20 is 1,805 US dollars/ton, down 50 US dollars; the price of Vietnamese 3L in the Shanghai market is 14,850 yuan/ton, down 50 yuan; the price of Malaysian standard SMR20 is 1,805 US dollars/ton, down 10 US dollars [2]. - The price of Thai RMB mixed rubber is 14,600 yuan/ton, down 50 yuan; the price of Malaysian RMB mixed rubber is 14,550 yuan/ton, down 50 yuan [2]. - The price of Qilu Petrochemical's styrene - butadiene 1502 is 12,200 yuan/ton, unchanged; the price of Qilu Petrochemical's cis - butadiene BR9000 is 11,900 yuan/ton, up 100 yuan [2]. - The basis of Shanghai rubber is - 1,025 yuan/ton, down 105 yuan; the basis of non - standard products of the main Shanghai rubber contract is - 1,220 yuan/ton, up 35 yuan [2]. - The price of 20 - number rubber in the Qingdao market is 12,838 yuan/ton, down 80 yuan; the basis of the main 20 - number rubber contract is 148 yuan/ton, down 120 yuan [2]. 3.3 Upstream Situation - The market reference price of smoked sheets of Thai raw rubber is 61.28 Thai baht/kg, down 1.87 Thai baht; the market reference price of rubber sheets of Thai raw rubber is 59.25 Thai baht/kg, up 0.35 Thai baht [2]. - The market reference price of glue of Thai raw rubber is 54.2 Thai baht/kg, unchanged; the market reference price of cup lump of Thai raw rubber is 49.45 Thai baht/kg, down 0.35 Thai baht [2]. - The theoretical production profit of RSS3 is 215.8 US dollars/ton, up 22.8 US dollars; the theoretical production profit of STR20 is 33.2 US dollars/ton, down 8.8 US dollars [2]. - The monthly import volume of technically specified natural rubber is 12.09 million tons, down 2.73 million tons; the monthly import volume of mixed rubber is 28.08 million tons, up 5.85 million tons [2]. 3.4 Downstream Situation - The weekly operating rate of all - steel tires is 63.09%, up 2.09 percentage points; the weekly operating rate of semi - steel tires is 72.07%, down 2.28 percentage points [2]. - The inventory days of all - steel tires in Shandong at the end of the week is 39.51 days, up 0.14 days; the inventory days of semi - steel tires in Shandong at the end of the week is 46.73 days, up 0.28 days [2]. - The monthly output of all - steel tires is 12.75 million pieces, up 130,000 pieces; the monthly output of semi - steel tires is 56.97 million pieces, up 1.74 million pieces [2]. 3.5 Option Market - The 20 - day historical volatility of the underlying is 21.9%, up 0.09 percentage points; the 40 - day historical volatility of the underlying is 17.4%, down 0.47 percentage points [2]. - The implied volatility of at - the - money call options is 23.34%, up 0.15 percentage points; the implied volatility of at - the - money put options is 23.36%, up 0.17 percentage points [2]. 3.6 Industry News - From August 17 - 23, 2025, rainfall in the main natural rubber producing areas in Southeast Asia decreased compared to the previous period. In the northern hemisphere, the red - marked areas with heavy rainfall are mainly in southern Myanmar and southern Cambodia, and the rainfall in most other areas is low, reducing the impact on tapping. In the southern hemisphere, the red - marked areas are mainly in eastern Malaysia and eastern Indonesia, and the rainfall in most other areas is moderate, also reducing the impact on tapping [2]. - As of August 17, 2025, the total inventory of natural rubber in bonded and general trade in Qingdao is 616,700 tons, down 3,100 tons or 0.50% from the previous period. The bonded area inventory is 76,900 tons, up 2.12%, and the general trade inventory is 539,800 tons, down 0.87% [2]. - As of August 14, the capacity utilization rate of Chinese semi - steel tire sample enterprises is 69.11%, down 0.60 percentage points month - on - month and 10.55 percentage points year - on - year; the capacity utilization rate of Chinese all - steel tire sample enterprises is 62.62%, up 2.56 percentage points month - on - month and 3.69 percentage points year - on - year [2].