(Reuters) - The multi-billion euro merger of two of Europe's big business consultancies capped losses for its major stock markets on Tuesday as Middle East tensions and doubts about the chances of progress in U.S-China trade talks this week weighed on sentiment. The pan-European STOXX 600 index dipped 0.13% in the first hour of trading, but the technology sector was up around half a percent on the back of Capgemini's purchase of smaller rival Altran for 3.6 billion euros.After three weeks of..