Chief Executive Bob Greifeld recently called for regulators to clamp down on dark pools.

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Bob Greifeld, CEO of NASDAQ OMX, is also hopeful that listed markets will improve their reach to new companies.

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He sat next to his right-hand man at Goldman, Gary Cohn, and in the same section as the short-selling hedge fund manager Jim Chanos, Barclays chief executive Bob Diamond and Nasdaq head Bob Greifeld.

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