Take a look at some of Wednesday's midday movers:
Alpha Natural Resources - The coal producer advanced after reporting a smaller-than-expected second-quarter loss.
AOL - The provider of online media gained after reporting second-quarter revenue that beat estimates.
Apollo Global Management - The private-equity company fell after posting weaker-than-expected second-quarter earnings.
Bank of America - The bank climbed after hiking its dividend for the first time in seven years.
Cerner - The provider of heath-care IT services rose after Wells Fargo upgraded the stock to outperform on news it's buying Siemens' hospital-IT business for $1.3 billion.
Cognizant Technology Solutions - The provider of IT services dropped after projecting slower growth.
Dish Network - The satellite-TV company rose after losing fewer-than-expected pay-TV subscribers in its second quarter.
HollyFrontier - The refiner gained after posting better-than-expected quarterly earnings.
Jazz Pharmaceuticals - The drug developer climbed after reporting better-than-expected quarterly earnings and raising its revenue guidance.
Mondelez International - The maker of Cadbury chocolate and Oreo cookies declined after trimming its sales target.
Molson Coors Brewing - The beer maker climbed after posting better-than-expected second-quarter results.
Nu Skin Enterprises - The direct seller of skin and nutritional products dropped after reporting a 73 percent decline in quarterly profit.
Ralph Lauren - The clothing brand edged higher after reporting first-quarter results.
Tim Hortons - The Canadian coffee chain rose after reporting a 9.3 percent rise in quarterly revenue.
Visteon - The auto-parts maker gained after reporting an 11 percent rise in quarterly revenue.
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—By CNBC's Rich Fisherman.
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