The pan-European STOXX 600 index rose 0.4pc to a new closing high of 452.57, having earlier hit an all-time high of 452.71. It added 0.8pc for the week.
The S&P 500 opened lower by 1.06 points, or 0.03%, at 4,096.11, while the technology-heavy Nasdaq Composite dropped 42.30 points, or 0.31%, to 13,787.02 at the opening bell.
The Dow Jones Industrial Average rose 22.62 points, or 0.07%, at the open to 33,526.19.