Twitter, DreamWorks, Hess, Buffalo Wild Wings, and Penn West are big market movers

IndustriesAssociated Press

Stocks that moved substantially or traded heavily Wednesday on the New York Stock Exchange and the Nasdaq Stock Market:

NYSE

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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.

Nasdaq

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.