NEW YORK (TheStreet) -- The S&P 500 closed up 0.01% while the Dow Jones Industrial Average fell 0.19%. On CNBC's "Fast Money" TV show, Brian Kelly, founder of Brian Kelly Capital, said Twitter and Facebook do not face the type of competition Yelp does. He is looking to buy Twitter in the low-$40s. Pete Najarian, co-founder of optionmonster.com and trademonster.com, added that Twitter is growing both revenue and its user base.