John At The Center

The moves by NYSE and Nasdaq OMX come at a time when the exchanges are seeking to generate as much revenue as possible from market data, which now makes up for a larger share of revenue than equities trading. At Nasdaq, market data generates 20 percent of revenue, while at NYSE, the figure is 14 percent.At Nasdaq, market data generates 20 percent of revenue, while at NYSE, the figure is 14 percent.

Link