March 2012 FIF Market Share And Market Dynamics Reports – Executive Summary

U.S. Equities Market Share

• Share volumes traded across Tape A, B, and C increased 5% monthly and decreased 15% annually to approximately 146 billion shares.
• In March 2012, off-exchange trading accounted for 33% of the shares traded in NMS Equity Securities.
• Share volume in NYSE-listed securities increased 7% monthly and decreased 12% annually to 84 billion shares.
• NASDAQ-listed securities share volume decreased 3% monthly and 16% annually to 37 billion shares.

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