JPMorgan analyst Sterling Auty downgraded Carbon Black to Neutral from Overweight and lowered his price target for the shares to $15 from $30. The company's transition to the predictive security cloud, including the introduction of several new products, has proved "challenging to message clearly to customers and to effectively close business in a timely manner," Auty tells investors in a post-earnings research note partially titled "Cheap For a Reason." This resulted in disappointing bookings in Q4, adds the analyst. He believes Carbon Black will need to better part of 2019 to sort out these challenges.