As of August 20, 2026, the phthalic anhydride market saw some companies in China raise their quotes, with low inventory levels supporting prices; the average difference indicator shows that the market is in a slightly bullish oscillation pattern, and prices are at a high point in the 1-year cycle, leaving relatively limited room for further increases.
I. Table of Mean Difference Changes
| Average Difference Type | Today's Value (2026-08-20) | Yesterday's Value (2026-08-19) | Direction of Change |
|---|---|---|---|
| 5-day Average Difference (D5) | 35 | 30 | + |
| 10-day Average Difference (D10) | 56.67 | 56.67 | Flat |
| 20-day Average Difference (D20) | -20 | -41.67 | + |
II. Signal State Determination
Due to the inconsistency in the direction of the three average differences (D5 is trending upwards, D10 is stable, and D20 is trending upwards), combined with the overall trend being bullish, it is determined that the current signal is strong consolidation (bullish).
III. Conclusions on Trend Directions
The price trend is oscillating (with a bullish bias). Reason: The 5-day and 20-day average differences have increased compared to yesterday, while the 10-day average difference remains stable. The directions of these changes are not entirely consistent, which fits the characteristics of oscillation. At the same time, most of the average differences are trending upwards, indicating a strong market consolidation with a bullish bias.
4. Spatial Reference
Phthalic anhydride prices are in the 5th tier (high) of a 1-year cycle, with limited room for further increases. Subsequent attention should be paid to the marginal changes in the market under high pressure.
V. Trend Chart Display
Six, Supplementary Market Dynamics
Enterprise quotes: On August 20, Zhenjiang Liancheng’s phthalic anhydride quote remained stable at 9,300 CNY/ton; Shijiazhuang Bailong’s quote was 9,100 CNY/ton, up 100 CNY/ton from the previous day; Changzhou Xinyang’s quote was 9,350 CNY/ton, up 100 CNY/ton from the previous day, with orders accepted only within limited quantities.
Facilities and Inventory: Some enterprises are operating their facilities at normal capacity. The utilization rate of the Changzhou Xinyang facility is around 50%. Several companies have low inventory levels or limited supply sources. The tight supply situation is providing support for prices.
Risk Warning
The above analysis is for reference only and does not constitute trading advice.
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