RIN credit prices for corn ethanol (D6) and biomass-based diesel (D4) hit all-time daily highs on May 18, 2021, at $1.90 and $2.00 per gallon. As of May 28, D6 RINs were up 129% year to date and D4 RINs up 96%.
EIA attributes the rise mainly to higher agricultural feedstock costs, not regulatory changes.
Surging biofuel margins and RIN values signal strong demand for corn and soybean oil feedstocks, supporting those prices. Higher compliance costs also pressure refiners and blending economics.
After 318 past bullish policy events, CORN moved a median -0.1% over 5 sessions (48% higher; middle half -1.4% to +1.5%), and -0.2% over 20.
After 842 past bullish policy events, SBO moved a median +0.2% over 5 sessions (52% higher; middle half -1.6% to +2.1%), and -0.5% over 20.
After 356 past bullish policy events, SOY moved a median +0.1% over 5 sessions (53% higher; middle half -1.2% to +2.3%), and -0.9% over 20.
Moves of each commodity's benchmark from the last close before the event. Historical reads pool past events of the same kind; they describe what happened, not what will. Not investment advice.