The Biofuels Digest Index, an index of publicly traded biofuels stocks, rebounded 1.28 percent to 61.73 as all sectors covered on easing Greek, China concerns. For the day, Gevo (GEVO) recovered 7.46 percent to $2.45, while Aemetis (AMTX) jumped 5.70 percent to $3.34. Among other equities, Green Plains (GPRE) rallied 7.06 percent to $26.84. Overall, advances led declines by a 7 to 3 ratio for the day.