Below is a comment from Eric Sprott on gold production versus what was traded on the LBMA. The key point is when you look at what is traded in paper against what is traded in physical gold, its not hard to see how easy it is to rig the spot price.

In the LBMA market, for example, market participants traded an average 19.6 million ounces of gold PER DAY in July 2011.1,2 Keep in mind that the total gold mine production in 2010, globally, was approximately 86.5 million ounces. Global gold mine production is not expected to increase significantly year-over-year, so the LBMA is essentially trading a year’s worth of production in less than a week. And this is just ONE market.

When you add the COMEX futures and gold ETFs, the paper trading volume becomes absurdly high. When price discovery is dictated by levered paper contracts with no physical backing, it’s extremely easy and relatively inexpensive to jostle the spot price around.