U.S. stocks posted their best day of the year on Wednesday and strategist John Spallanzani thinks the rally is just getting started.

The Dow Jones industrial average advanced about 300 points, closing above 21,000 for the first time. The climbed 1.4 percent to 2,395.96 after briefly breaking 2,400 for the first time.

"Going forward, I think really things are in place for the Trump rally to continue," the chief macro strategist for GFI Group said in an interview with "Closing Bell."

For one, interest rates are low and if banking regulations are eased even a little bit, there would be much more money for banks to lend, he pointed out.

"I think there's so much liquidity out there that we haven't really seen it go into, one, the market and two, the economy," Spallanzani said. "There's a lot more good news to come, especially if Trump is able to get GDP to 3 percent, 4 percent."

Saira Malik, head of global equity research at TIAA Global Asset Management, is banking on the fundamentals pushing the market higher.

"Earnings growth is going to be what continues to drive the S&P 500 higher from here and that is supported by the strong economic data you've been seeing since mid-2016."

There has also been a lot of participation by individual investors, said Danielle Hughes, CEO of Divine Capital Markets.

"We're going to see that through. I think that this kind of a rally today will incite people to participate more," she told "Closing Bell."

"The markets want to fly. They've been held back for a while."