white house tuesday deny president donald trump plan issue executive order change national biofuels program u.s. renewable fuel association rfa say trump team inform group order pending trade u.s. refinery share fuel futures corn price turbulent news pending order subsequent denial investors puzzle would mean price gasoline ethanol share company produce rfa issue statement early tuesday say member trump administration call inform group president intend sign executive order would shift onus combine biofuels gasoline away refiners order would require company supply chain retailers sell gasoline shoulder load refiners long request change say biofuels program hammer profit white house spokeswoman kelly love however say tuesday afternoon ethanol executive order work ethanol fuel retail group react quickly report trump regulation adviser billionaire investor carl icahn majority owner cvr energy cvi.n refine company would benefit change stock 80 percent since trump election november even white house denial rfa chief executive officer bob dinneen stick statement say certainly something work go confirm ready roll it decline identify trump administration contact association despite continue opposition move tell executive order negotiable dinneen say renewable fuel standard require fuel company use increase amount biofuel blend gasoline diesel former u.s. president barack obama expand rule start predecessor george w. bush gasoline price near record refineries without operations design blend biofuels ethanol gasoline pay renewable fuel credit know rins meet u.s. environmental standards help reduce greenhouse gas emissions cost refiners increase sharply last years nine major publicly trade refiners pay 2.5 billion 2016 rins cost 78 percent increase 2015. among push change icahn hold 82 percent stake cvr company share jump tuesday par gain white house denial end 3.5 percent day 22.92 share heavier-than-usual trade volume 1.7 million share icahn unavailable comment cvr decline comment emily skor ceo biofuel trade group growth energy express concern role icahn may play plan change program assure deal anyone carl icahn say approach deal would flat-out reject it seven democratic senators include elizabeth warren massachusetts send letter white house month say icahn role adviser trump create financial conflict interest call review share u.s. refiner valero vlo.n would also benefit change end percent tuesday close 67.95 share biofuel organizations group represent fuel retailers integrate oil company like u.s. units royal dutch shell plc rdsa.l bp plc bp.l oppose change say complicate manage program one source say rfa tell executive order would include incentives ethanol biodiesel tradeoff blend shift change could include waiver allow great volumes ethanol blend gasoline summer review environmental protection agency estimate emission impact biofuels support congressional tax credit domestic producers biodiesel source say chicago board trade corn futures cc1 end 1.7 percent cbot soyoil boc1 use biodiesel rise 4.8 percent compliance credit use meet annual biofuel blend standards trade around 43 cents tuesday 47 cents 48 cents previously par big morning losses white house deny trump order biofuels program pending market roil