With the fall harvests essentially completed and something of a hiatus in fresh inputs from USDA until 12 January when it releases final production estimates, we find ourselves starting to wonder how, why and when the next fundamentally-driven bull market might occur.We suppose that bear markets and bull markets in grains have a number of things in common, but the most basic commonality is that they both inevitably come to an end of their own making – the old rule about the best cure for high/low prices is high/low prices. A classic example of this was seen when the multi-year bull market that began in mid-2010 came to a crashing stop. The precise end of the latest bull market varies by grain, and the timing is subject to some debate. We wo...