Shutterstock (SSTK) was under heavy pressure Tuesday (-7.2%) after Morgan Stanley initiated coverage on the stock with an Underweight rating and a price target of $40. The company traded down 6.49% on Tuesday, hitting $52.33. About 6% (2,134,222 shares) of the company’s stock traded hands. Morgan Stanley analyst Dean Prissman said based on their proprietary AlphaWise study and bottom-up analysis, they believe Adobe's aggressive entry into Shutterstock's market is set to pressure growth.