That came after short-seller Hindenburg Research revealed last month it had taken a short position in the company, citing "fresh evidence of accounting manipulation." Cassava Sciences — The biotech company fell 11% after agreeing to pay $40 million to settle a case with the Securities and Exchange Commission. Wynn Resorts — The stock rose about 6% thanks to an upgrade to overweight from equal weight at Morgan Stanley. Amgen — The biotech's shares rose 2% after Cantor Fitzgerald initiated research coverage with an overweight rating. — The aerospace and defense stock added 16% following a price target increase from KeyBanc Capital Markets, which retained an overweight investment rating.

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Persons: Bristol Myers, Hindenburg, Morgan Stanley, Amgen, Cantor Fitzgerald, Olivia Brayer, Michael Leshock, — CNBC's Sean Conlon, Alex Harring, Yun Li, Hakyung Kim, Samantha Subin, Pia Singh Organizations: Bristol Myers Squibb, Food and Drug Administration, Bristol, Nordisk —, JPMorgan, Wall, Costco Wholesale, Revenue, Wall Street Journal, Justice Department, Hindenburg Research, Securities and Exchange Commission, Wynn Resorts, UAE, HP Inc, Bank of America, KeyBanc Locations: Nordisk — U.S, Danish, Las Vegas