Forget "sell in May and go away"—investment strategist Carmine Grigoli told CNBC Friday that he expects the market to "explode to the upside" over the next couple of months.
"Interest rates are falling, profit growth is accelerating … and M&A activity is soaring," he told CNBC's "Power Lunch."
Grigoli, chief investment strategist at Mizuho Securities, thinks that adds up to a 10 percent to 12 percent rally by year's end.
Historically, May through September tend to be the weakest months for the market.
Although Jim McDonald, chief investment strategist at Northern Trust, sees "acceptable value" in the market, he isn't as bullish as Grigoli.
"There has got to be better evidence the U.S. can break out of this 2 to 2.5 percent growth pace," he said. "We're seeing some positive signs on credit creation but the housing market is going nowhere fast, so we're not that excited about the upside potential."