The Biofuels Digest Index, an index of publicly traded biofuels stocks, fell 0.80 percent to 67.92 as advanced biofuels tumbled. For the day, Pacific Ethanol (PEIX) shed 4.80 percent to $12.04, while (GEVO) tumbled 7.39 percent to $3.15. Among other equities, Biox (BX.T) rallied 9.52 percent to $0.69. Overall, declines led advances by a 3 to 2 ratio for the day.