Today's phthalic anhydride spot market trend is based on the latest monitoring data from September 20, 2026. The analysis using the mean difference method shows that phthalic anhydride is currently in a clear downward trend, with prices already in the high range of a 1-year cycle. The upside potential is limited, and upstream and downstream practitioners can reasonably adjust their business plans according to the supply and demand dynamics.
The latest available phthalic anhydride data for China is up to September 20, 2026. It is recommended to refer to real-time data.
I. Table of Finite Differences
| Mean Difference Indicator | Value as of September 20, 2026 | Value as of September 19, 2026 | Direction of Change |
|---|---|---|---|
| 5-Day Mean Difference (D5) | 0 | 13.33 | - |
| 10-Day Mean Difference (D10) | 58.33 | 81.67 | - |
| 20-Day Mean Difference (D20) | 321.67 | 326.66 | - |
II. Signal Status Judgment
Clearly identify a downtrend signal
III. Conclusions on Trend Directions
Clear downtrend. Reason: The directional changes of the 5-day, 10-day, and 20-day moving averages are all negative, consistent with the criteria for identifying a clear downtrend under the moving-average method.
4. Location and Spatial Reference
Phthalic anhydride 60-day, 3-month, and 1-year cycle prices are all in the 5th tier (high), meaning the prices are in the highest 20% range within the cycle, with limited room for further increase.
V. Trend Chart Display
6. Reference for Upstream and Downstream of the Industry Chain
Upstream: Crystalline naphthalene, OX
Downstream: Diquat, phosmet, mancozeb, various phthalates, unsaturated resins, alkyd resins, etc.
VII. Risk Warning
The above analysis is for reference only and does not constitute trading advice.
(Source: )
