I put this out for you as I thought you'd agree as to the author's cred. Was looking for something else and came upon this old Wray piece. Probably saw it at the time but must have been otherwise occupied.
http://www.nakedcapitalism.com/2011/09/randy-wray-the-biggest-bubble-of-all-time-%E2%80%93%C2%A0comm...
"Yes, commodity bubbles happen, but eventually reality sets in and brings the price back down to reality. You don’t get 3, 4, and 5 standard deviation events. A four standard deviation price rise falls outside 99.994% of all outcomes—one in 100,000 years; a five standard deviation price rise is about one in 2 million years. That pretty much covers the time since our ancestors beat things with big sticks.
But wait a minute. The standard deviation of price rises for iron (5), coal, copper, corn and silver (4), sorghum, palladium, and rubber (3.5), flaxseed, palm oil, soybeans, coconut oil, and nickel (3), and so on down through jute, cotton, uranium, tin, zinc, potosh and wool (2) are so unlikely that they quite simply could not have happened. Individually. Together, the likelihood that we’ve got an unlikely boom in almost all of the 33 commodities? All at the same time? Impossible. Cannot happen. Not in the lifetime of our sun, let alone our planet."
