According to the Commodity Market Analysis System of Shengyi Society, the domestic natural rubber spot market has been consolidating at a high level recently (8.25-9.1). As of September 1st, the spot rubber market in China’s natural rubber market was around 14958 yuan/ton, a decrease of 0.11% from 14975 yuan/ton on August 25th. Downstream tire production has fluctuated slightly, forming a strong demand support for Tianjian; On the other hand, the price of natural rubber raw materials remains strong, and the cost support of natural rubber continues; In addition, the slight decrease in domestic port inventory and the favorable market atmosphere have driven natural rubber prices to fluctuate and rise. As of September 1st, the mainstream price for 24 years of Guangken, Baodao, and Haibao latex in Qingdao area ranges from 14900 to 15150 yuan/ton.
As of September 1st, the price of Thai glue was 55.45 baht/kg, an increase of 0.36% from 55.25 baht/kg on August 25th. Recently, the main rubber production areas at home and abroad have been affected by rainfall and typhoons, resulting in lower than expected new rubber production and high raw material prices.
Recently (8.25-9.1), natural rubber inventories have continued to decrease slightly, and the market atmosphere has improved. As of August 31, 2025, the total inventory of Tianjiao bonded and general trade in Qingdao area was 602000 tons, a decrease of 0.4 million tons or 0.6% compared to the previous period.
Recently (8.25-9.1), there has been a slight consolidation in downstream tire production, providing strong support for the natural rubber market’s essential needs. As of August 29th, the construction of semi steel tires by domestic tire companies has slightly increased to around 7.5%; The production of all steel tires by tire companies in Shandong Province has slightly decreased to around 6.3%.
Market forecast: The current high domestic and international raw material prices, stable downstream tire production, and consolidation provide support for the Tianjin rubber market. The Tianjin rubber port inventory has slightly decreased, and with the arrival of the peak season, it is expected that the natural rubber market will fluctuate and rise in the later period.

According to the monitoring of the commodity market analysis system of Shengyi Society, the magnesium ingot market in Shaanxi Province slightly decreased this week (8.18-8.22), with an average market price of 17437 yuan/ton at the beginning of the week and 17400 yuan/ton at the end of the week, a decrease of 0.22%.
This week, the magnesium market experienced a brief and slight consolidation before gradually recovering, but overall prices have slightly decreased. The market supply and demand relationship is balanced, and the overall price remains stable.
Supply and demand side
In terms of supply, in the magnesium smelting industry, due to the current low inventory of enterprises, when magnesium prices experience a certain degree of decline, enterprises adopt different market response strategies. Among them, some companies choose to follow the market and ship in small quantities at current lower market prices to recoup funds or maintain market participation; On the other hand, some companies adhere to a pricing strategy based on optimistic expectations of future market trends or cost control considerations, choosing to stop shipping to avoid low-priced sales. The differentiation of this market behavior has led to significant resistance in the downward trend of magnesium prices, making it difficult to sustain the decline. At the same time, with the gradual increase in the number of market purchases, the supporting role of the demand side has become apparent, driving the rapid recovery of magnesium prices.
In terms of demand, the downstream market experienced a relatively concentrated procurement period last week, and the number of orders placed this week has decreased. The market trading atmosphere is slightly quiet, but as the weekend approaches, the market trading situation has rebounded.
Raw material end
Recently, the market has shown that coal prices have remained relatively stable, while orchid charcoal prices have slightly increased, silicon iron prices have remained stable, and overall costs have slightly decreased.
comprehensive analysis
During this year’s overseas summer break, the market continued to show a stable to strong trend, with prices gradually recovering to a relatively reasonable range and overall fluctuations being relatively small. This phenomenon indicates that the supply and demand pattern of the market has undergone fundamental changes, and the demand scale of the domestic market is sufficient to support the current market situation. Based on this, it is expected that the market will continue to maintain a stable tone and maintain a strong operating trend in the future.

The market price of butadiene rubber in August slightly increased. According to the commodity market analysis system of Shengyi Society, as of August 28th, the market price of butadiene rubber in East China was 12200 yuan/ton, an increase of 2.01% from 11960 yuan/ton at the beginning of the month. The price of raw material butadiene fluctuates and rises, causing the cost center of butadiene rubber to shift upwards; The production of butadiene rubber has fluctuated slightly, and there is not much pressure on the supply side; Downstream tire production has slightly increased, mainly supporting the demand for butadiene rubber. As of August 28th, the mainstream reports for Qilu, Daqing, Sichuan, and Yangtze Shunding in East China are 11900~12400 yuan/ton.
The price of butadiene fluctuated slightly higher in August, and the cost support of butadiene rubber strengthened. According to the Commodity Market Analysis System of Shengyi Society, as of August 28th, the price of butadiene was 9283 yuan/ton, an increase of 2.58% from 9050 yuan/ton at the beginning of the month.
In August, there was a slight fluctuation in the domestic butadiene rubber plant. As of the end of August, the domestic butadiene rubber production started at around 6.90%, and the supply pressure was not significant.
Demand side: Downstream tire production slightly increased in August, providing strong support for the demand in the butadiene rubber market. As of August 22, the construction of semi steel tires by domestic tire companies has slightly increased to around 7.40%; The construction of all steel tires by tire companies in Shandong Province has slightly increased to around 6.5%.
Market forecast: From a fundamental perspective, analysts from Shengyi Society believe that raw material prices have slightly increased, downstream tire production has slightly increased, and coupled with the arrival of the peak season, it is expected that butadiene rubber will continue to fluctuate and rise in the later period.

According to the Commodity Market Analysis System of Shengyi Society, the focus of polyester prices has been partially raised today. As of August 27th, the mainstream polyester filament factories in Jiangsu and Zhejiang, POY (150D/48F), quoted at 6800-6950 yuan/ton, polyester DTY (150D/48F low elasticity) at 8000-8150 yuan/ton, and polyester FDY (150D/96F) at 7000-7200 yuan/ton.
The price of polyester filament has shown a stable but rising trend recently, and many mainstream production enterprises have raised their quotations. Since the beginning of August, the polyester filament market has entered a continuous price increase mode. On August 11th, 12th, 13th, 20th, 21st, and 26th, mainstream enterprises announced a price increase of 50 yuan/ton, directly promoting the steady upward trend of market quotations.
Cost support: The main raw material PTA has been operating at a strong price recently, with current market prices around 4850-4870 yuan/ton. The strong price of PX provides support for PTA, while multiple PTA production companies have announced maintenance plans, and it is expected that supply will tighten. These have all supported the price of polyester filament from the cost side.
On the supply side: Previously, mainstream production enterprises had joint production cuts to maintain market order by regulating the supply scale, which to some extent eased the supply-demand contradiction and supported prices.
On the demand side: The downstream weaving start-up rate has slightly rebounded recently. At the same time, the traditional peak consumption season of “golden September and silver October” is approaching, and the market is looking forward to the recovery of demand in the future, especially in niche markets such as Oxford cloth and luggage cloth, which have performed well. In addition, the extension of the window period for some tariff rates imposed by the United States on China by 90 days has also boosted expectations for foreign trade exports to a certain extent. Mainstream production enterprises have a strong willingness to raise prices.
Inventory level: The inventory pressure in the industry has recently eased. As of recent data, POY inventory is around 22 days, FDY inventory is around 25 days, and DTY inventory is around 34 days, indicating an overall improvement in inventory structure compared to the previous period. The decrease in inventory has also provided some support for prices.
Business Society believes that cost support is expected to remain strong, coupled with traditional peak season demand expectations and enterprise willingness to raise prices. These factors may continue to drive prices upward, and there is a high possibility of strong fluctuations in polyester filament prices in the short term. It is still necessary to pay attention to the actual recovery of downstream demand.

Last week (August 18-24, 2025), the upstream raw material market for nylon filament showed a weak trend with a slight decline. The nylon PA6 slicing market was mainly consolidating, with insufficient cost support and high inventory levels in the market. The industry supply was sufficient, and there was no sign of improvement in downstream market demand. The probability of downstream enterprises opening up was not high, and they held onto rigid demand procurement in multiple aspects. The trading atmosphere in the market was not good, and many operators held a cautious and wait-and-see attitude. The nylon filament market was weak and stable, with prices remaining stable at a low level.
Nylon filament prices remain weak and stable
According to the Commodity Market Analysis System of Shengyi Society, last week (August 18-24, 2025), the price of nylon filament remained stable at a low level. As of August 17, 2025, DTY (premium product) of nylon filament in Jiangsu region; 70D/24F) quoted 14320 yuan/ton; Nylon POY (premium product; 86D/24F) quoted 12050 yuan/ton; The price of nylon FDY (premium: 40D/12F) is quoted at 14900 yuan/ton, which is the same as the previous period.
The raw material side has experienced a slight decline
In terms of cost: Last week (August 18-24, 2025), the spot market price of caprolactam remained weak and stable. The weekly closing price of caprolactam from Sinopec was 9575 yuan/ton (interest free for six-month acceptance). The nylon PA6 chip market was mainly weakly consolidated, with a weekly decline of 0.64%, indicating weak cost support. As of August 24, 2025, the benchmark price of caprolactam in Shengyi Society was 8986 yuan/ton, mainly due to weak price consolidation, with a weekly decline of 0.37%. During the week, the market price of high-speed spun nylon PA6 chips remained weak, stable, and fluctuating, with weak cost support being the main factor.
Supply and demand: During the week, the operating rate of some nylon filament manufacturers’ facilities decreased, and the overall market supply was sufficient. However, the industry inventory level still showed an increasing trend, and the supply side performance was poor; The demand in the end market is weak, and some downstream manufacturers have reduced production or switched production, resulting in a decrease in demand for nylon filament. It is difficult to find favorable support from the demand side, and many parties are following suit with rigid demand. Many industry players are adopting a cautious and wait-and-see attitude.
Future forecast
Cost aspect: In terms of caprolactam, the expectation for pure benzene is weak, and slice manufacturers have low enthusiasm for purchasing caprolactam. It is expected that the caprolactam market will be dominated by weak and low-level consolidation next week; In terms of PA6 slicing, cost support is limited, and the supply level of PA6 slicing market may continue to improve. Downstream market demand is weak, and it is expected that the market price of nylon PA6 slicing will weakly decline.
Supply and demand: August belongs to the off-season of traditional demand in the market, coupled with the lack of signs of improvement in terminal market demand and low purchasing enthusiasm in downstream markets. Therefore, it is expected that the demand for nylon filament market may decrease next month. If there is no significant improvement in demand, under the pressure of large inventory, some nylon filament manufacturers may have the possibility of reducing production capacity, while the industry continues to release new production capacity. Therefore, it is expected that the supply of nylon filament market will decrease next month.
Overall, both the upstream raw material caprolactam spot market and the nylon PA6 chip market may continue to decline, with a lack of cost support and difficulty in improving downstream market demand. The demand side is dragging down the market trend, and under the dual negative factors, analysts from Shengyi Society predict that the short-term nylon filament market will remain weak and stable, with weak price consolidation as the main focus.