Rivalry between Paris and London could jeopardise Europe’s competitiveness in the vast “over-the-counter” derivatives markets, France’s stock market regulator has warned.
Jean-Pierre Jouyet, chairman of the Autorité des Marchés Financiers, the French regulator, told the FT that disagreement between the two countries over how to regulate trading in these complex products could hinder a European solution and drive business to the US.



