对二甲苯：商品市场整体走弱，月差回落，PTA：趋势偏弱，月差关注正套，MEG：单边趋势仍偏弱，月差反套

Report Summary 1) Investment Rating The report does not provide an overall industry investment rating. 2) Core Views - PX: The commodity market is weakening, and PX long - positions are being reduced. Suggest going long PX and short PTA01 contracts, and shorting PXN on rallies. The supply is marginally decreasing, but the cost side is strengthening, so PXN should be shorted on highs [1][8]. - PTA: The trend is weak. Consider basis reverse arbitrage and focus on long - short positive arbitrage for the monthly spread. The supply pressure is increasing, and the basis remains suitable for reverse arbitrage. With potential changes in device operations in August, the 9 - 1 monthly spread positive arbitrage can be considered. The polyester start - up may bottom out in the short term, and the processing fee of the 01 contract is trending down [1][8][9]. - MEG: The unilateral trend is still weak. Consider basis positive arbitrage and monthly spread reverse arbitrage. Supply pressure from non - mainstream warehouse receipts is a concern. The port inventory is falling, but the monthly spread is weak due to delivery pressure. The spread between ethylene glycol and plastics/styrene is at a high level, so consider shorting ethylene glycol and going long L. The supply is relatively loose, and some ethylene oxide devices may switch to produce ethylene glycol [1][9][10]. 3) Summary by Related Catalogs Market Overview - PX: Concerns about the lack of progress in Sino - US trade negotiations are increasing, pressuring the spot market. Supply tightness in August and September is expected to ease, and the PX - naphtha spread is weakening. The PX start - up rate in China is about 80.5%, and the PX price fell on July 31 [3][5]. - PTA: A 1.5 - million - ton PTA device in East China has a temporary shutdown, and some other devices have reduced loads. The PTA start - up rate is about 81.2%, and the capacity base has been adjusted to 8851.5 million tons since July 1, 2025 [5]. - MEG: A 300,000 - ton/year synthetic gas - to - ethylene glycol device in Inner Mongolia has a temporary shutdown, and a 400,000 - ton/year device in Xinjiang has restarted. The overall start - up load of ethylene glycol in mainland China is 69% (up 0.65% from the previous period), and the capacity base has been adjusted to 2917.5 million tons since June 1, 2025 [6]. - Polyester: Two polyester devices are under maintenance, and a new 300,000 - ton polyester device in Anhui has been put into production. The overall polyester load is fluctuating, and the start - up load of domestic polyester industrial yarn has dropped to about 67%. The sales of polyester filaments in Jiangsu and Zhejiang on July 31 were weak, and the average sales of direct - spun polyester staple fibers were 53% [6][7]. Trend Intensity - The trend intensity of PX, PTA, and MEG is - 1, indicating a weak trend [8]. Futures and Spot Data | Futures | PX | PTA | MEG | PF | SC | | --- | --- | --- | --- | --- | --- | | Yesterday's closing price | 6928 | 4808 | 4414 | 6464 | 531.3 | | Change | - 64 | - 48 | - 36 | - 36 | 2.7 | | Change rate | - 0.80% | - 0.99% | - 0.81% | - 0.55% | 0.51% | | Monthly spread (yesterday's closing price) | 64 | - 32 | - 27 | - 58 | 5.2 | | Monthly spread (change) | - 42 | - 34 | 1 | - 4 | - 1.9 | | Spot price (yesterday) | 859.33 (USD/ton) | 4826 (CNY/ton) | 4492 | 611 | 72.7 (USD/barrel) | | Spot price (change) | - 7 | - 32 | - 33 | 2.75 | - 0.85 | | Spot processing fee (yesterday) | 292.5 | 192.67 | 84.81 | - 22.45 | - 6.01 | | Spot processing fee (change) | 12.96 | - 5.64 | - 30.82 | 6.34 | 0 | [2]