Aruba Networks plunged after the tech company reported fiscal third-quarter earnings and revenues that missed expectations. The network equipment maker also forecast fourth-quarter earnings below consensus on increased competition from Cisco. A slew of analyst downgrades and lowered price targets followed Aruba's quarterly results and outlook.
Newmont Mining hit another 52-week low as the price of gold continued to slide.
Royal Bank of Scotland traded higher after the largely state-owned financial firm announced plans to cut jobs as part of a restructuring. UBS also added RBS to its "Key Call" list.
Pandora traded lower after MKM Partners initiated the stock with a "sell" rating, with a price target of $10 per share.
Northrop Grumman, Master Card and Johnson & Johnson were among companies that hit historic highs. Meanwhile, Ford, Halliburton and Boeing hit new 52-week highs.
—By CNBC's Lori Spechler
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