Among stocks making big moves:
Microsoft plunged 3 percent after it announced the departure of Steven Sinofsky, who ran its Windows division. The unexpected move comes just weeks after Microsoft launched Windows 8, its first major overhaul in years of the operating system used on most of the world's computers. Microsoft fell 90 cents to $27.09.
Weatherford International dropped 15.9 percent after the oilfield services company reported revenue that was lower than analysts had been expecting. The company did not report full results because of accounting problems that have led it to revise its results from numerous periods. The stock fell $1.73 to $9.15.
Apparel chain operator TJX Cos., the parent of TJ Maxx and Marshalls, rose 2.7 percent after raising its full-year earnings forecast and reporting third-quarter revenue that exceeded analysts' expectations. The stock added $1.09 to $42.06.
Daniel Wagner can be reached at www.twitter.com/wagnerreports .
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