With Thanksgiving nearly upon us, it is time to see if the "turkey trend" holds true once again. As WPI's Bob Kohlmeyer once described (WPI 21 November 2006), a seasonal market trend is the strong tendency for soybean futures to close higher on the days before and after Thanksgiving. I made the mistake of asking a veteran trader why soybeans always seemed to act this way. He scowled at me for a second as though I were dumb, and then said, "Because sellers take long holiday weekends and buyers don't." I never asked again. However, the fact is that over the last three decades January soybeans have closed higher on the day before Thanksgiving more than 75 percent of the time. That is an extraordinarily high correlation...