Moscow, 2016-Jul-22 — /EPR Retail News/ — O’KEY Group S.A. (LSE: OKEY), one of the largest food retailers in Russia, announces operating results for the Second Quarter and the First Half of 2016. All materials published by the Group are available on its website www.okeyinvestors.ru. Key highlights for Q2 2016:  Group net retail revenue increased by 5.8%…