Ethanol extended its longest streak of gains in almost two months with stockpiles at a record low for the time of year. Futures jumped 0.7 percent as the Energy Information Administration may report tomorrow that supply of the motor fuel declined last week. Ethanol stockpiles are down 26 percent from this year’s high in January, according to the Energy Department’s statistical arm. “We do have fairly tight supply,” said Mike Blackford, a consultant at INTL FCStone in Des Moines , Iowa . “It’s had a better bias, a firmer tone.” Denatured ethanol for December delivery rose 1.2 cents to $1.718 a gallon on the Chicago Board of Trade. The gain was the fourth in a row, the most since Sept. 19. Prices have dropped 22 percent this year. Gasoline for December delivery dipped 0.11 cent to $2.5954 a gallon on the New York Mercantile Exchange . The contract covers […]