Ethanol futures climbed for the seventh time in eight days as the highest production rates in 21 months fail to replenish stockpiles. Futures rose as much as 2 percent as supply has been at record seasonal lows most of this year even as output increased amid cheaper prices for corn, the primary ingredient used to make the additive in the U.S., data compiled by Bloomberg show. “The front-end has its own set of issues to deal with on supply and demand,” said Will Babler, a broker at Atten Babler Risk Management LLC in Galena, Illinois . “Even with really high production rates, supply is still tight.” Denatured ethanol for December delivery jumped 3.2 cents, or 1.8 percent, to $1.809 a gallon at 12:10 p.m. New York time on the Chicago Board of Trade. Futures have dropped 17 percent this year. Gasoline for December delivery rose 0.13 cent to $2.659 […]