By Tharuniyaa Lakshmi and Niket Nishant July 10 (Reuters) – European shares ended a four-week winning streak on Friday, buffeted by an unwind in tech stocks and resurgent tensions in the Middle East that rattled oil markets. The pan-European STOXX 600 lost 1.8% during the week, as investors dialled back hopes that the energy supply shock would ease soon. The U.S. and Iran traded strikes, while Washington re-imposed sanctions on Iranian oil.