Commodity inflation
James Hamilton (November 15th, 2009) Writes:
Why are the prices of so many commodities rising in an economy that seems to remain quite weak?
% change butter35 coffee21.8 cocoa20.2 copper89.1 corn-8.3 cotton38.6 gold32.1 hogs2.7 oats13.4 oil63.2 lead81.9 palladium75.9 platinum61.7 silver59.1 steel-0.9 sugar73.6 tin22.5 wheat-26.6 zinc55.4 average37.4 euro12The table at the right summarizes the percent change between January 6 and November 11 in the cash prices of 19 commodities reported in the Wall Street Journal (downloaded via Webstract). The average commodity in this list has appreciated 37% since the start of the year.
A recent paper by Ke Tang and Wei Xiong documents an increasing tendency for commodity prices to move together over the last few years. A decade ago, what happened to oil prices was largely unrelated to movements in most other commodity prices. The graphs below show how the correlations between oil prices and
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