Instacart's (NASDAQ:CART) stock already reflects the intensifying competitive landscape in online grocery delivery, according to Goldman Sachs.The Instacart Analyst: Analyst Eric Sheridan reiterated a Buy rating and price target of $67. • CART stock is gaining positive traction. See what is driving the movement here.The Instacart Thesis: The company's stock has declined by 12% since September, after a series of announcements including Amazon.com Inc's (NASDAQ:AMZN) expansion of its grocery offering, Uber Te ...