Reasons? Besides the quality and speculation issues, it's possible that KC-wheat has less protein than normal because of the crop stress. That gets discounted in the market. I don't know the contract specifications for KC but I believe they do allow a wide range of protein content for eligible delivery. Lesser protein content grain tends to depress the price. Regarding the spread between WK8 and KWK8, May is a "swing month" in wheat. It can trade all over the place. The locals can push it around easier at this stage of its listing. I hope some of that helps.