Exchange giant NYSE Euronext has become the first stock market to make plans to put price data from different trading venues on a single platform, a key demand from traders who fear they are losing out from the fragmentation of the market in recent years.

The transatlantic exchange intends to launch a service that collates trading data from European dark pools before the end of June. Dark pools enable brokers and asset managers to execute large, market-sensitive orders by hiding information about these trades from rivals.