In the case of dark pools, "large investors … would be wary of real-time reporting that could reveal their activity to other traders," Adam Sussman, partner at the Tabb Group, said in a Tabb Forum article in May. In addition, how dark pool volume is collected might distort the final numbers and some see it as an internal company matter and trade secret not to be divulged outside the firm. Exchanges Lobbying for More Market Share In the meantime, traditional stock exchanges are reacting to the threat dark pools pose to their businesses. The chief executives of the three largest U.S. exchanges, Duncan Niederauer of the New York Stock Exchange Euronext (NYX), Robert Greifeld of the Nasdaq OMX Group (NDAQ), and Joe Ratterman of Bats Global Markets Inc. (BATS), joined forces in an effort to improve the competitive environment and restrict dark pool operators.