Take a look at some of Monday midday movers:
Gilead Sciences - Shares fell after Rep. Henry Waxman, D-Calif., questioned the price of its Hepatitis C drug Sovaldi.
Alexion Pharmaceuticals - Shares fell on thinking its only approved drug, Soliris, could fall under congressional scrutiny due to its high cost.
Bon-Ton Stores - The department-store operator rose after Buckingham Research said it was an attractive takeover target.
Stratasys - The maker of 3D printers rose after JPMorgan upgraded it to overweight from neutral.
Palo Alto Networks - Shares of the provider of security software fell after it agreed to pay about $200 million for Cyvera, an Israeli cybersecurity company.
Schlumberger - Shares of the provider of oilfield services rose after it projected first-quarter earnings to be higher than a year ago.
Madison Square Garden - Shares fell after the sports-and-entertainment company agreed to acquire a 50 percent stake in Tribeca Enterprises, a film company co-founded by Robert De Niro.
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—By CNBC's Rich Fisherman.
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