Top 10 New York Stock Exchange-traded stocks posting largest volume increases

Markets Associated Press

A look at the 10 biggest volume gainers on New York Stock Exchange at the close of trading:

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AZZ Inc. : Approximately 677,700 shares changed hands, a 496.4 percent increase over its 65-day average volume. The shares rose $.19 or .5 percent to $41.96.

Briggs & Stratton Corp. : Approximately 1,730,900 shares changed hands, a 390.0 percent increase over its 65-day average volume. The shares fell $.75 or 4.2 percent to $17.27.

China Green Agriculture Inc. : Approximately 4,159,000 shares changed hands, a 642.1 percent increase over its 65-day average volume. The shares rose $.27 or 13.6 percent to $2.25.

Civeo Corp. : Approximately 7,779,000 shares changed hands, a 435.4 percent increase over its 65-day average volume. The shares rose $.91 or 7.8 percent to $12.52.

Clean Harbors Inc. : Approximately 2,747,700 shares changed hands, a 547.0 percent increase over its 65-day average volume. The shares fell $1.66 or 3.1 percent to $52.26.

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National Presto Industries Inc. : Approximately 214,300 shares changed hands, a 944.8 percent increase over its 65-day average volume. The shares fell $4.02 or 6.6 percent to $56.69.

Niska Gas Storage Partners LLC : Approximately 430,800 shares changed hands, a 390.5 percent increase over its 65-day average volume. The shares fell $.44 or 3.5 percent to $12.04.

Opower Inc. : Approximately 1,172,700 shares changed hands, a 1,138.8 percent increase over its 65-day average volume. The shares fell $.98 or 5.2 percent to $17.88.

Phillips 66 LP : Approximately 1,127,400 shares changed hands, a 881.1 percent increase over its 65-day average volume. The shares fell $.65 or 1.0 percent to $66.10.

SPX Corp. : Approximately 1,835,900 shares changed hands, a 469.2 percent increase over its 65-day average volume. The shares fell $3.98 or 4.2 percent to $89.95.