The logo of Russian gas giant Gazprom is seen on a board at the St. Petersburg International Economic Forum (SPIEF), Russia, June 6, 2019. REUTERS/Maxim Shemetov/File Photo MOSCOW, June 16 (Reuters) – Russian gas giant Gazprom (GAZP.MM) said on Wednesday it expects its 2021 core earnings, or EBITDA, to rise by […]