MYOK

Tuesday's top analyst upgrades and downgrades included Alexion Pharmaceuticals, Bill.com, Boeing, Costco, Dicks Sporting Goods, Generac, Proofpoint, Regeneron Pharmaceuticals and Shopify.
MyoKardia shares hit an all-time high early on Monday after it was announced that Bristol-Myers Squibb would be acquiring the company.
MyoKardia shares made an incredible gain on Monday after the company announced positive results from its late-stage pivotal clinical trial of mavacamten.