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Basis offers were mostly unchanged in the US rail and truck markets, in slow trading ahead of Thursday's US Thanksgiving Day holiday. A soy processor in Frankfort, Indiana, rolled its truck offer to Chicago Board of Trade January futures from the December contract.
CBOT soymeal futures tumbled more than 3 percent, pressured in part by the unwinding of soymeal-soyoil spreads. CBOT December soymeal futures were down $9.60 at $315.30 per ton at 11:25 a.m. CST (1725 GMT).
Soyoil futures surged 7 percent, heading for their largest daily percentage gains since 2009, after the US Environmental Protection Agency boosted blending mandates for biodiesel in 2017.