High-profile fund manager Milford Asset Management has confirmed it is being investigated by the Financial Markets Authority over alleged market manipulation.
"The investigation concerns an individual trader employed by the firm and certain specific trades," the company said.
"Milford and the trader concerned are co-operating fully with the FMA."
The company said the investigation does not have implications for client funds and has no impact on day-to-day operations at Milford.
"Milford looks forward to completion of the investigation," the firm said.