NEW YORK, Dec. 8, 2011 /PRNewswire/ -- Investment Technology Group, Inc. (NYSE: ITG), a leading agency research broker and financial technology firm, today announced that November 2011 US trading volume was 3.8 billion shares and average daily volume (ADV) was 183 million shares.  This compares to 4.1 billion shares and ADV of 196 million shares in October 2011 and 3.9 billion shares and ADV of 186 million shares in November 2010. There were 21 trading days in November 2011, October 2011 and November 2010. Although November 2011 trading volume was relatively strong based on overall market activity, the trading mix negatively impacted average revenue capture per share....
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