Among the stock activity stories for Monday, Sept. 17, from AP Business News:
— Shares of electric car maker Tesla Motors jumped after Morgan Stanley upgraded the stock.
— Shares of high-speed networking technology company Ciena Corp. fell after an analyst said that he lacks confidence in the company's ability to achieve its financial targets in 201
— Shares of Gilead Sciences Inc. rose after a JPMorgan analyst increased his price target on the stock and forecast higher sales of Stribild, Gilead's newest HIV pill.
