You can't always sell at 46, buy at 45, especially since prices are steadily rising. You may end up selling at 46 and buying at 47. Also, if you have cash on hand from selling tech or just in general, you can already put out SOs for the cheap food. I don't see a reason to attempt something like Bobby's example in Primary. To make a noteworthy profit you'd have to shuffle 10s of millions of bushels and there definitely haven't been 10s of millions of bushels selling under $60, for example, because I've had SOs out and haven't got them.