I also feel they need to have value to support the RV but, I dont believe the sole source of backing comes from the foreign reserves. The true value of the currency is represented in natural resources, which as of right now, is not represented in the current "dirty float" rate. IMO, foreign currency reserves are being used as a tool to reduce the money supply and manage the current exchange rate. Do they need to have sufficient reserves in place to help support an RV? Yes, I believe so but, natural resources are what will back a hard RV at 1-1, not reserves. Food for thought.