PTA: The price of PTA dropped sharply yesterday, but the spot market has a heavy volume. The spot basis of the day has strengthened to around 25-30 yuan/ton, and the 9-1 spread has not changed much. In general, under the expectation of the peak season for polyester production, the enthusiasm of polyester factories for stocking has increased, PTA prices have fallen less than oil prices, and processing fees have remained stable. Under the correction of crude oil prices, the cost of PTA was frustrated. After entering the verification period for the peak season, pay attention to the start of polyester production and the changes in profit inventory levels. PTA recommends 9-1 positive set operations.