Stocks gain as investors welcome preliminary U.S.-China trade deal

LONDON (Reuters) - World stock markets rose on Monday, trading a notch below a record high hit last week on the back of a preliminary trade deal agreed between the United States and China.European shares built on the previous week's gains. By midday in London, the pan-European STOXX 600 index was up by 1.2% and touched a record high. Germany's DAX rose 0.6%.Britain's FTSE 100 index was up 1.14%, moving in tandem with a buoyant pound that rose 0.3%, adding to gains last week on the back of a..