European shares ended slightly lower on Thursday, held back by a post-results slump for British insurer Aviva.
Asian shares were mixed on Thursday as investors shrugged off overnight gains in the U.S and turned attention to central bank meetings in Europe. Japan's Nikkei came off a four-and-a-half-year high but held onto most of its gains amid expectations for aggressive monetary easing.
Asian shares hit fresh highs on Wednesday, extending the previous day's rally after a record close for the Dow Jones stock index on upbeat U.S. economic news gave risk appetite a further boost.
U.S. stock index futures signaled a higher open on Tuesday, with the Dow Jones Industrial Average within reach of touching its all-time closing high, boosted by upbeat economic data from Europe and ahead of the service-sector report.
European shares were flat on Friday as talks over the "fiscal cliff" stalled.