European shares edge up, optimism from U.S./Mexico deal fizzles

LONDON (Reuters) - European shares rose slightly at the open on Wednesday as optimism triggered by the U.S./Mexico deal gradually fizzled and uncertainty grew about a similar agreement with Canada and a lasting solution to the trade spat with China.At 0719 GMT, the STOXX 600 was up 0.2 percent with most bourses and sectors trading in positive territory. Germany's RTL posted the best performance of the pan-European index with a 6.2 percent rise after publishing forecast-beating growth in..