These were the worst performing ETFs of the week.
BOIL — ProShares Ultra Bloomberg Natural Gas -21.98%
YANG — Direxion Day FTSE China Bear 3X Shares -22.10%
GDXD — MicroSectors Gold Miners -3X Inverse Leveraged ETNs -18.68%
UNG — United States Natural Gas Fund LP -17.74%
GAZ — iPath Series B Bloomberg Natural Gas Subindex Total Return ETN -16.39%