Stocks that moved substantially or traded heavily Wednesday on the New York Stock Exchange and the Nasdaq Stock Market:
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Twitter Inc., up $7.71 to $46.30
The short messaging service reported stronger-than-expected quarterly profit as revenue more than doubled and its user base grew.
United States Steel Corp., up $5.36 to $33.03
The steelmaker narrowed its quarterly loss, beat Wall Street expectations and expects to see growth in its operating income.
Penn West Petroleum Ltd., down $1.30 to $7.85
The oil company said it is conducting an audit of its accounting practices and will have to restate certain financial statements.
Hess Corp., up $1.63 to $101.05
The energy company plans to spinoff some assets through a master limited partnership to support growth in North Dakota.
DreamWorks Animation SKG, down $2.67 to $19.98
The animation studio reported a second-quarter loss on a dip in revenue, with the results falling short of expectations.
Buffalo Wild Wings Inc., down $21.98 to $145.17
The restaurant chain reported better-than-expected quarterly results, but its outlook fell short of Wall Street expectations.
Taser International Inc., up $1.86 to $13.36
The electrical weapons maker reported better-than-expected quarterly profit on a boost in sales to law enforcement agencies.
NutriSystem Inc., down $2.08 to $15.86
The weight loss programs company reported a boost in quarterly profit, but its outlook fell short of Wall Street expectations.