John W. Henry & Company, based in Boca Raton, Florida, was the top performing currency fund manager in April with returns of 11.77% for its US dollar programme, according to the Parker FX Index.

Overall, the Parker FX Index, made up of 45 currency programmes, is up 1.31% for April, with 67% of the programmes reporting positive results. The 45 programmes are managed by 36 firms and have $7.5bn (€8bn) in currency assets.