EuroMTS, the government bond trading platform, faces calls from bond brokers to end the rule making it compulsory for them to list prices for more than five hours a day.
The pressure comes in the wake of Citigroup's €15bn ($18bn) trade earlier this month when it sold €11bn of European government bonds on the MTS system and within minutes bought back €4bn at cheaper prices to make an estimated profit of €10m to €25m.