Take a look at some of Wednesday's midday movers:
J.C. Penney moved lower after its CFO made a bearish presentation on future earnings by cutting the retailer's fourth-quarter sales forecast.
Chimerix and Tekmira fell on news of the death of the first known eBola patient in the U.S., Thomas Eric Duncan. He was being treated with Chimerix experimental drug.
Monsanto moved a bit higher in a volatile morning of trading. The agrochemical company posted a larger-than-expected fourth-quarter loss, but revenues came in better than expected.
GoPro moved lower after hitting a record high on Tuesday. Piper Jaffray downgraded the active sports camera maker to "neutral" from "overweight" while maintaining a $90 price target.
Cogent Communications rose after Raymond James upgraded the stock to "outperform" from "market perform," with a $35 price target.
Greif moved higher after Wells Fargo upgraded the industrial packaging company to "outperform," citing its restructuring efforts.