NYSE Euronext : Program Trading Averaged 44.3 Percent of NYSE Volume during Dec. 17-21

Program Trading Averaged 44.3 Percent of NYSE Volume during Dec. 17-21

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NEW YORK, Dec. 28, 2012 -- The New York Stock Exchange, a subsidiary of NYSE Euronext (NYX), today released its weekly program-trading data compiled from member firms' executed volume from NYSE's orders database.The report includes trading on the NYSE for Dec. 17-21.

The data indicated that during Dec. 17-21, program trading amounted to 44.3 percent of NYSE average daily volume of 2,095.2 million shares1, or 928.1 million program shares traded per day.This included program trading associated with the December 21 quarterly expiration of stock-index options, futures and options on index futures.

Program trading encompasses a wide range of portfolio-trading strategies involving the purchase or sale of a basket of at least 15 stocks.

1 The NYSE calculates program trading as the sum of shares bought, sold and sold short in program trades.The total of these shares is divided by the sum of shares bought, sold and sold short on the NYSE including its crossing sessions.

The data contained in this press release are owned by NYSE Euronext, its affiliated companies and other disseminating parties, as applicable, and are protected by U.S. and international copyright and other laws.NYSE Euronext grants the recipient of this press release the non-exclusive limited right to use, distribute or reproduce the data contained herein in connection with news reporting and related endeavors.Any other use of the data is expressly prohibited without the express written permission of NYSE Euronext.

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