In short, the scarcity of available silver in the London LBMA vaults is far more advanced than most people think. And with 14 ETFs, and not just SLV, competing for available silver, the bullion banks and storage providers are now in a “Houston, we have a problem” mode. A problem which you will see from a quick review of these 14 silver-backed ETFs and Exchange Traded Products (ETPs) which claim they are fully physically backed with silver stored in LBMA vaults in London.