Despite all the back and forth between Donald Trump and Xi Jinping's negotiating teams, the U.S. and China will ultimately come to a trade agreement, according to one investor.

When that happens, markets could soar 15% or more for the rest of the year, said Jackson Wong, associate director at Huarong International Securities.

"The rumor is (that by the) end of April, the deal would be 90 percent done. And, by end June, (the) deal would be signed," Wong told.

Wong's prediction follows the market rally that began at the beginning of this year, roughly coinciding with investors' increasing expectations that a U.S.-China trade deal could be inked.

"Now the investors in China or around the world are expecting a deal to be done. They have been expecting since the end of last year. So I think the market has been rallying from that point on," he said.