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Midday movers: Wynn Resorts, Chevron, Crocs & more

Wall Street subway station NYSE
Scott Mlyn | CNBC

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

Wynn Resorts - The casino operator rose after Morgan Stanley upgraded the stock to overweight from equal weight.

Norwegian Cruise Line Holdings - The cruise operator declined after it named a new president and CEO, saying the previous one decided to leave.

Chevron - The oil producer and others such as Exxon Mobil, Hess, Anadarko Petroleum and ConocoPhillips fell with crude.

JPMorgan Chase - The bank dropped after Reuters cited a source in saying it would pay roughly $500 million to settle litigation.

Regeneron Pharmaceuticals - rose as an experimental drug it is developing with Sanofi was found to be effective in monthly dosages.

Polaris Industries - The maker of off-road vehicles fell after being downgraded to market perform from outperform at BMO Capital.

Gilead Sciences - The drug developer rose on an accord with Anthem in which its hepatitis C drug will be the health insurer's primary treatment for hepatitis C.

Staples - The office-supplies retailer fell after Credit Suisse cut its rating to neutral from outperform.

Starwood Hotels & Resorts Worldwide - The lodging company dropped after JPMorgan downgraded the stock to neutral from overweight.

Acuity Brands - The supplier of industrial and residential LED lighting gained on better-than-expected first-quarter results.

Nuance Communications - The voice recognition software maker declined after Goldman Sachs cut its rating to sell from neutral.

Portola Pharmaceuticals - The drug maker rose after saying its experimental drug reversed the effect of an anticoagulant drug in a late-stage study.

Argos Therapeutics - The drug developer lost ground after saying its experimental drug to treat HIV failed to meet its goal in a mid-stage study.

Crocs - The maker of plastic footwear fell after Piper Jaffray downgraded the stock to neutral from overweight.

(See CNBC's Market Insider Blog)

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