UBS analyst Stephen Powers downgraded Keurig Green Mountain (GMCR) to Neutral saying the company is facing execution issues on three fronts, namely the transition to 2.0, reviving the K-Cup franchise and making KOLD more mass-market. Powers believes Keurig needs to be successful on all three fronts. He sees downside risk for shares below the $70 level if execution fails. The stock closed yesterday up 13c to $84.30. Powers cut his price target for Keurig to $86 from $114. He coupled today's downgrade with an upgrade of Monster Beverage (MNST) to Buy.