* Gain Capital announces monthly metrics for june 2017

* Gain Capital Holdings - OTC trading volume for retail segment in June 2017 $241.8 billion versus $231.7 billion in june 2016

* Gain Capital Holdings - OTC average daily volume for retail segment in June 2017 $11.0 billion versus $10.5 billion in june 2016 Source text for Eikon: Further company coverage: