Today, the DOP spot price continues to rise, with the average difference indicator releasing a clear signal of an increase. Major manufacturers in China have collectively raised their quotes. The current price is in the high range of the 1-year cycle, and the subsequent upward space may be constrained by the high position. It is necessary to closely monitor the changes in supply and demand in the industry chain.
I. Table of Mean Difference Changes
| Average Difference Type | Today's Value (2026-08-18) | Yesterday's Value (2026-08-17) | Direction of Change |
|---|---|---|---|
| 5-day Average Difference (D5) | 75 | 30 | + |
| 10-day Average Difference (D10) | 67.5 | 62.5 | + |
| 20-day Average Difference (D20) | 50 | 34.17 | + |
II. Signal Status Determination
Three deviations all changed in the same positive direction compared to the previous day, which is a clear signal of an increase.
III. Trend Direction Conclusions
The price trend is clearly upward. Reason: According to the mean difference method, the 5-day, 10-day, and 20-day mean differences are all positive, and their directions are completely consistent, meeting the criteria for a clear upward trend; at the same time, on August 18th, major Chinese manufacturers collectively raised their DOP quotes by 100-150 CNY/ton, with actual transaction prices also increasing, supporting the upward trend in market transactions.
4. Spatial Reference
The DOP price has been in the mid-to-high range over the 1-year cycle and is currently at a high level within the 60-day cycle. The mid-to-high range indicates that the current price is approaching the upper end of the cycle’s price band, and further upside potential may be constrained by these high levels. If the supply-demand dynamics in the industrial chain lack sustained positive support, the upward momentum of prices could gradually weaken.
V. Trend Chart Display
VI. Supplement to Market Dynamics
August 18 Manufacturer Quotes: Shandong Shengfeng Chemical’s DOP quoted price is 9,105 CNY/ton, up 100 CNY/ton; Dongying Yimide Chemical’s quoted price is 8,950 CNY/ton, up 150 CNY/ton; Zhenjiang Liancheng Chemical’s quoted price is 9,200 CNY/ton, up 100 CNY/ton; Zhejiang Hongbo New Materials’ quoted price is 9,300 CNY/ton, up 100 CNY/ton. Actual transaction prices have risen accordingly across the board.
The upstream of the DOP industrial chain involves 2-ethylhexanol, phthalic anhydride, and isooctanol, while the downstream is PVC plasticizers. The supply and demand changes in the upstream and downstream of the industrial chain will continue to affect the price trend of DOP in China.
Risk Warning
The above analysis is for reference only and does not constitute trading advice.
(Source: China)
