Wall Street has been abuzz with the proposed merger between the NYSE Euronext ( NYX) and Deutsche Boerse.

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Other competitors in the financial sector include: NYSE Euronext (NYX), IntercontinentalExchange (ICE), and CME Group (CME).

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Other competitors in the financial sector include: NYSE Euronext (NYX), Nasdaq OMX Group (NDAQ), and CME Group (CME).

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Other competitors in the financial sector include: NYSE Euronext (NYX), Nasdaq OMX Group (NDAQ), and CBOE Holdings, Inc (CBOE).

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To be sure, the bidding war for NYSE Euronext (NYX) could hardly be anything less than a riveting daily news saga.

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In the most recent ProShares filing, however, the trust notes that NYSE Arca, a trading venue of NYSE Euronext ( NYX) and the primary exchange for the vast majority of U.S.-listed ETPs, would be the venue of choice.

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His likely successor at NYSE Euronext (nyse: NYX - news - people ), Duncan Niederauer, is a fellow Goldman alum who has expressed disdain for floor brokers--another sign the ever-shrinking auction floor of the Big Board is giving way to NYSE's electronic systems.

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John Thain, former chief executive of NYSE Euronext (nyse: NYX - news - people ), talked to the Citi search committee, led by board member and interim Chairman Robert Rubin, but in the end he took the top job at Merrill Lynch (nyse: MER - news - people ).

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