Midday movers: BP, Starbucks, Tesla Motors & more

Wall Street New York Stock Exchange NYSE
Scott Mlyn | CNBC

Take a look at some of Friday's midday movers:

Ambarella - The maker of video-processing chips rose after reporting better-than-expected second-quarter earnings.

BP - The oil producer rose after Citigroup upgraded its shares to a buy from neutral.

Family Dollar Stores - The discount retailer declined after rejecting an improved bid from competitor Dollar General.

Finisar - The network-equipment maker slid after a slew of brokerage firms cut their ratings on the company.

Gap - The clothing retailer fell after posting disappointing same-store sales in August.

Gilead Sciences - The biotechnology company fell after Bloomberg News reported it was nearing a deal with generic drug manufacturers to bring less-expensive versions of its hepatitis C drug to developing nations.

Golar LNG - The shipper fell after its chairman said it would sell up to a 34 percent stake in the company.

Jazz Pharmaceuticals - The drug developer gained after Dealreporter said Allergan might be looking to acquire the company.

Keryx Biopharmaceuticals - The drug developer fell after winning approval from the U.S. Food and Drug Administration for its drug to lower phosphate levels in people with chronic kidney disease.

Priceline Group - The travel site dropped after Evercore downgraded its shares to equal weight.

SanDisk - The data-storage provider rose after Morgan Stanley upgraded its shares to overweight from equal weight.

Starbucks - The coffee-shop operator edged higher after saying it would test an express store in New York next year.

Taser International - The company known for its electric-shock weapons rose on news New York City's police department would begin equipping a small number of its officers with video cameras made by the company.

Tesla Motors - The electric-car maker dropped after CEO Elon Musk described the electronic-car company's stock price as "kind of high right now," at least while viewed in the short term.

Wynn Resorts - The casino operator declined after being downgraded to hold from buy at Argus Research.

(See CNBC's Market Insider Blog)

—By CNBC's Rich Fisherman.

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