Take a look at some of Wednesday's midday movers:
Altera gained after the chipmaker topped earnings expectations and projected a sequential increase in current-quarter sales. The company's results come a day after Broadcom also posted better-than-expected earnings.
Wellpoint moved lower after its earnings miss and downbeat 2012 guidance. Other health-care stocks followed, including United Healthcare, Healthnet, Aetna and Cigna.
Ralph Lauren was lower after some negative analyst comments on its European operations.
Lumber Liquidators rose after it reported better-than-expected earnings as revenue increased by nearly 20 percent from a year ago.
Baxter gained ground after it boosted its by dividend 34 percent and approved a new $2-billion buyback.
Regeneron moved higher after it boosted its 2012 sales forecast for its new eye drug Eylea for the third time this year.
International Game Technology fell after its quarterly results fell short of Wall Street estimates due to increased competition and higher costs for its gaming operations.
Polycom also lost ground after the video-conferencing company warned of continued weakness in its European operations.
Sanofi rose after the world’s first vaccine against dengue fever beat three virus strains in a clinical trial.
Corning fell after it reported a 39 percent drop in second-quarter profit on weak sales.
Seadrill hit a new high after the Norwegian offshore oil rig operator won a potential $4-billion deal for three of its drillships in the Gulf of Mexico.
Natural Grocers rose 20 percent in its debut on Wall Street.
US Airways took off after it said strong passenger demand helped produce its highest quarterly profit in company history.
Eli Lilly moved higher after its quarterly earnings beat Wall Street expectations. The drug maker also raised its 2012 outlook because of the stronger dollar.
Teck Resources fell after its second-quarter earnings miss. Teck is a coal, copper and zinc miner.
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