(Reuters) – TCS Group Holding, which runs Russian online bank Tinkoff, on Thursday said it was introducing a 3% commission on incoming SWIFT transfers in dollars, euros and pounds and setting a minimum amount for outgoing transfers at $20,000. With their already limited cash holdings of hard currency, Russian banks have few options for investing foreign currencies because of capital controls in Russia and the risk of funds abroad being frozen as a result of Western sanctions, causing some to introduce fees. “The minimum sum for SWIFT transfers will be $20,000,” Tinkoff said on its Telegram cha…