Turquoise, the equities trading platform, is due to announce plans for a pan-European share trading service linking “dark pools” operated by banks in the latest effort to combat the increasing fragmentation of liquidity across the region. The move also pits Turquoise, launched three months ago, against the London Stock Exchange for a second time in the competition for market share in trading blue-chip stocks, as the exchange plans to launch a dark pool of its own.
