The Biofuels Digest Index, an index of publicly traded biofuels stocks, gained 0.50 percent to 63.89 as enzymes rocked. For the day, Gevo (GEVO) gave up early-week gains, falling 11.20 percent to $2.30, while Neste Oil (NTOIF) jumped 5.98 percent to $26.75. Among other equities, Dyadic (DYAI) soared 10.10 percent to $1.09. Overall, advances led declines by a 2 to 1 ratio for the day.