Though it has struggled to stay in positive territory, the S&P 500 could climb 10 percent by the end of the year, widely followed bull Tom Lee contended Tuesday.
The index has fallen about 0.4 percent this year, and ended slightly lower on Tuesday. Still, seasonal strength and solid economic data could bring a year-end surge, said Lee, managing partner and head of research at Fundstrat Global Advisors.
"I know it's a stretch, but it's a seasonally good period. I think the U.S. data has been, for the most part, very good," he told CNBC's "Power Lunch."