If you are waiting for an answer on the difference between leasing and selling I can probably help. Central banks are very reluctant to part with their gold as it is about the only thing of real value that they possess. So along comes the gold carry trade. The gold in storage is leased out at a small percentage point to a second party that in turn sells the position in order to invest the cash in some other investment with a higher rate of return. Often the leased gold is bought by an ETF or perhaps another central bank that in turn leases the same gold out a second time. This practice can go on and on, resulting in the same gold having a claim on it by more than one party. There is a big difference between the Greenspan statements that are factual and have been official policy for over ten years and the suggestion of Tungsten bars at Fort Knox.