What UBS' Art Cashin is watching in the markets right now

U.S. stocks rose slightly on Thursday morning as investors gear up for the second half of 2021. The Dow Jones Industrial Average was higher by about 46 points, while the S&P 500 added 0.2% and set a new intraday record high. The tech-heavy Nasdaq Composite ticked up 0.1%. CNBC's "Squawk on the Street" team discusses what's driving the moves with Art Cashin of UBS.