GCAP - GAIN Capital December OTC ADV rises 3.3% M/M January, 13 2020 05:02 PM GAIN Capital Holdings Inc. GAIN Capital Holdings (NYSE:GCAP) December OTC average daily volume of $6.2B rose 3.3% from November and fell 35% from December 2018.More news on: GAIN Capital Holdings, Inc., Financial stocks news, Read more ...