European shares closed lower on Friday amid concerns of higher interest rates and inflation, prompted by central bank policy decisions throughout the week. The STOXX 600 index fell 0.3%, with the index having lost 2.9% for the week, its worst weekly performance in over three months. Siemens Energy's shares plummeted 37.3% after the company withdrew its annual profit outlook, citing quality problems at its Siemens Gamesa wind turbine unit. The basic resources index fell for the seventh straight session, posting weekly declines of 7.9%, the worst performer of the week. GSK's shares rose 4.9% after it reached a confidential settlement in a US litigation.