While a weakening dollar can strengthen commodities like gold, it can also be an indirect play on oil through assets like the Invesco DB Oil Fund (DBO). Up 40% this year, DBO seeks to track the DBIQ Optimum Yield Crude Oil Index Excess Return (DBIQ-OY CL ER), which is intended to reflect the changes in market value of crude oil. In the meantime, DBO can also be used as a hedging tool against inflation.