I see that sugar trades as SB and YO? What's the Difference? Why are there two? I know that NYMEX handles YO and NYBOT handles SB. But what why would a person trade YO as opposed to SB? I get the feeling that SB has greater volume. Then WHO trades YO? Growers? I'm also trying to get my hands around why there are so many ways to trade a single commodity (i.e. mid am corn, national corn, mini corn, and plain old corn! etc.) Feel free to recomend, articles, books, other sites, etc.) Thanks to all who help! B "learning about this stuff"