IntercontinentalExchange in Talks to Buy NYSE Euronext: Reports

NEW YORK ( TheStreet) -- NYSE Euronext ( NYX), the operator of the New York Stock Exchange, is in talks to sell itself to rival IntercontinentalExchange ( ICE), according to reports.

People close to the discussions told The Wall Street Journal an announcement could come as early as Thursday.

Under a deal, ICE would value NYSE at $33 a share, a 37% premium to its closing price on Wednesday, according to a report from CNBC.

NYSE closed Wednesday at $24.05 and soared more than 20% in after-hours trading.

Spokespeople for both companies wouldn't comment.

-- Written by Joseph Woelfel

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