European shares flat as optimism from U.S.-Mexico trade deal wanes

LONDON (Reuters) - European shares were little changed on Wednesday as optimism triggered by a U.S. trade deal with Mexico ebbed, and uncertainty grew about a similar agreement with Canada and a solution to Washington's spat with Beijing.At 0840 GMT, the STOXX 600 index was up 0.1 percent with most bourses and sectors broadly flat. The United States and Mexico agreed on Monday to overhaul the NAFTA trade association, boosting risk appetite that looked to be waning on Wednesday. Investors were..