Stocks took a leg higher Friday afternoon on comments from the White House that President Donald Trump is “optimistic” China will seek a deal with the U.S.

The S&P 500 rallied 1.8%, after veering repeatedly between gains and losses, to cap a chaotic and historic week full of monstrous swings. The Dow Jones Industrial Average went from an early loss of nearly 340 points to a gain of 810 before settling at a rise of 619 points, or 1.6%, while the Nasdaq composite jumped 2.1%.

Trump has said Americans may feel “some pain” because of tariffs, but he has also said the long-term goals, including getting more manufacturing jobs back to the United States, are worth it.