Take a look at some of Wednesday's midday movers:
Infinity Pharmaceuticals soared on news the company said it would receive an upfront payment of $275 million from the drug research company Abbvie as part of a new collaboration to develop and commercialize a treatment for blood cancer.
Amazon fell on news that the e-commerce giant's chief financial officer, Thomas Szkutak, will retire in June 2015 amid growing investor concerns over the company's increased spending and lack of profit.
Verizon edged higher after the telecommunications firm agreed to pay $7.4 million to settle a consumer privacy investigation with the Federal Communications Commission.
Noble Corp rose as hedge fund Fir Tree Partners reported that it had raised its stake in the offshore driller to 9.6 percent from 5.7 percent.
China Mobile moved higher as the Asian telecommunications company began taking preorders for Apple's iPhone 6 in Beijing.
Tetraphase advanced on news the drugmaker's experimental drug to treat urinary tract infection was successful in a late stage study.
Zoetis gained ground after the animal health company received a conditional license from the U.S. Department of Agriculture for a vaccine against a deadly piglet virus.