RE:American dollar
That's the funny thing about the markets. They sometimes peg currencies against resources and commodities.
But that's not a real peg. What drives commodities is supply and demand.
The physical asset trading will guide the market (especially if the Saudi's use the swing vote) and if the peg is there, it's the US dollar that will have to "unpeg".
Will be interesting to watch. Especially if there is no unpegging!