Morgan Stanley says President Donald Trump’s partial trade deal with China is an “uncertain” arrangement at best and there does not appear to be viable path to reduce existing tariffs at the moment. 

The U.S. agreed to suspend a tariff increase on at least $250 billion in Chinese goods to 30% from 25% set for Tuesday, but a tariff hike implemented in September was not rolled back and plans for another hike just before the the Christmas holiday on Dec. 15 remain in place.

Without a durable dispute settlement mechanism in place, another round of tariff increases cannot be ruled out, according to Morgan Stanley. 

“There is not yet a viable path to existing tariffs declining, and tariff escalation remains a meaningful risk,” the bank said in a note. “Thus, we do not yet expect a meaningful rebound in corporate behavior that would drive global growth expectations higher.”

The president said that the first phase of the trade deal will be written over the next three weeks. As part of phase one, China will purchase between $40 billion and $50 billion in U.S. agricultural products.