Tec,
You are right about the farmer taking a beating for the market. A loaf of bread rarely changes while the wheat farmer sees ridiculous swings in price.
When I was much younger I made some money by watching the feeder pig market. When the market bottomed I would stock up on replacement gilts and a boar. When their first pigs were ready for market the price was on an uptick, by the second or third farrowing the price was topped out, Then I would sell the whole herd and do something else. Did it twice, once the price stayed up for two more years, but I still doubled my money. Could have just as easily got skinned but I was blessed.