They agreed to take down most of their tariffs that economists warned could start a recession and create shortages on US store shelves.
The S&P 500 was 2.7 per cent higher in early trading on Monday (late Monday and early Tuesday AEST).
The Dow Jones Industrial Average jumped 981 points, or 2.4 per cent, and the Nasdaq composite was 3.7 per cent higher.
Crude oil prices jumped because a global economy less weakened by tariffs would be hungrier for fuel.
The value of the US dollar climbed against other currencies and Treasury yields rose.
