Euronext is to trial a new incentive scheme for proprietary trading firms that access its markets through a broker, in an unusual move to help boost the volumes across its four European stock exchanges.

The operator of markets in Paris, Amsterdam, Brussels and Lisbon issued a call on August 12 for non-member firms and their brokers to participate in a six-month pilot liquidity scheme that will begin in the fourth quarter of this year, subject to regulatory approval.