Overnight trading saw corn and soybean futures prices edge lower, while wheat values firmed a few cents. In truth, there was nothing around to inspire trade in grain or soy futures, and certainly nothing to encourage potential buyers except perhaps a few shorts wishing to even up their positions. General Comments From a macro viewpoint, the minutes of the last Federal Reserve meeting released today indicate a growing discussion among Fed officials over when and how to raise interest rates and begin tightening its multi-year, easy money monetary policies. Many of the heads of the world's central banks are in Jackson Hole, Wyoming for their annual gathering. Analysts will scan all of the speeches and comments for clues as to how the Fed mig...