UPDATE 1-Nasdaq adds 12 stocks to list of canceled trades

NEW YORK, May 9 (BestGrowthStock) – Nasdaq OMX Group Inc (NDAQ.O: )
said on Sunday it has added 12 stocks to the list of trades it
was canceling following Thursday’s sudden market plunge.

All but one of the stocks Nasdaq added are listed on an
exchange operated by rival NYSE Euronext (NYX.N: ).

The Dow Jones Industrial Average suffered a thus far
unexplained intraday plunge of nearly 1,000 points on Thursday
afternoon before paring much of that decline, prompting
exchanges to cancel trades that occurred on hundreds of stocks
during the market’s swoon.

Of the 12 stocks Nasdaq added on Sunday, 11 are listed
either on the New York Stock Exchange or its sister exchange
Arca, which like the Nasdaq Stock Market is all electronic.

NYSE and Nasdaq issued a joint statement on Sunday saying
they were “committed to working closely with each other” and
the U.S. Securities and Exchange Commission to find out what
caused Thursday’s plunge.

The statement comes after a sniping match on Friday betweenthe heads of the two exchange operators that included Nasdaq
OMX Chief Executive Robert Greifeld faulting an NYSE mechanism
that slows floor trading when prices move too sharply.
[ID:nN07263865]

The additions include the index-based IQ Hedge Macro
Strategy Tracker ETF (MCRO.P: ) and WisdomTree LargeCap Growth
Fund (ROI.P: ), which are both listed on Arca, and the
PowerShares S&P SmallCap Utilities Portfolio (XLUS.O: ) which
lists on Nasdaq.

Nasdaq is canceling all trades made between 2:40 p.m. EDT
and 3 p.m. EDT on Thursday that deviated more or less than 60
percent away from the consolidated last print in that security
at 2:40 p.m. or just before. Nasdaq said last week its decision
cannot be appealed.

An updated list of stocks affected by the cancellations
released by Nasdaq on Sunday included 236 stocks. To view the
list, please see:
http://media.globenewswire.com/cache/6948/file/8216.pdf.

Stock Trading

(Reporting by Phil Wahba, editing by Maureen Bavdek)

UPDATE 1-Nasdaq adds 12 stocks to list of canceled trades