Stocks making the biggest moves midday: SpaceX, Roku, Tripadvisor, Ferrari & more

Check out the companies making the biggest moves in midday trading: SpaceX — Shares were up 9% in the company's second day of trading on Monday. SpaceX in its debut at the Nasdaq on Friday rose 19% from its IPO price of $135 per share. The company raised a total of $85.7 billion including the underwriters' "greenshoe" overallotment. Ferrari — The luxury carmaker's stock jumped 5% after Morgan Stanley upgraded it to overweight from equal weight with a price target of $438. …