The Digest Bioeconomy Index, an index of publicly traded advanced bioeconomy stocks, fell 0.84 percent to 49.79 as chemical equities tumbled. For the day, Metabolix (MBLX) dumped 7.85 percent to $1.41, while Gevo (GEVO) shed 6.30 percent to $1.86. Among other equities, BioAmber (BIOA) lost 5.85 percent to $5.31. Overall, declines led advances 9 to 5 for the day.