By Harry Robertson LONDON (Reuters) -Euro zone bond yields posted their largest one-day fall so far this month on Wednesday ahead of U.S. inflation data due out Thursday, and the results of the U.S. midterm elections. Yields, which move inversely to prices, have soared this year as the European Central Bank (ECB) followed the U.S. Federal Reserve in hiking interest rates to try to cool inflation. Central banks have dropped hints they might moderate the pace of their aggressive rate hikes as economies start to slow, but bond yields have not strayed far from multi-year highs. The yield on the 10…