On the London Exchange, the big gainers of the day were Inmarsat ( ISAT ), Old Mutual (OML) and Tesco ( TSCO ), which ended Friday's session up 5.2%, 5.2% and 4.3% respectively. European markets ended Friday with gains as the Bank of Japan surprised investors by deciding to introduce negative interest rates in an attempt to spur inflation. Reports coming out of the U.K. Friday show at that total exports of services (excluding travel, transport and banking) in current prices rose 2.1% between 2013 and 2014.