ROKU is on track for its best day since November after a rare upgrade Roku Inc (NASDAQ:ROKU) is up 9.1% to trade at 67.44thismorning,ontrackforitsbestsingle−sessiongainsinceNovember.ThiscomesafterGuggenheimupgradedthestreamingstockto"buy"from"neutral"andsetitspriceobjectiveat75. The analyst in coverage highlighted several revenue drivers, including home screen ads and original content. The upgrade is notable because the brokerage bunch leans bearish, with 15 of the 24 analyst ...