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I do not understand how to value a commodity.  Supply/Demand, hedging, speculation, etc. are factors that determine a price or a commodity.  I do feel that the trend of commodity and agriculture goods use will continue to increase.  I see only higher demand for these goods as more and more people are able to attain them.  As such, I have watched this ETN since $60.   I feel that this index ETN with agriculture, metals, energy, etc. is a way to diversify into this sector.  However, I do feel that there is risk as to timing and bubblishness at the current time.  I am entering this with a limited amount of funds to see what actions the FED will persue in the next few months.  The fee (.75 basis points) is tied for the lowest of the commodities ETNs. 

I like this ETF because of its exposure and low expense fees.  It is a passive way to get exposure to China, HK, Brazil, etc.  I feel that growth outside of the US will be greater in real terms on average over the next 20 years.  This is also excellent for people unable to amass $2500 to $5000 to purchase shares in an emerging mkts index fund. 

Like Warren Buffet said in his latest annual letter, if the US mkt grows at the rate is has over the 20th century (5.3%) the Dow will be at 2,000,000 by the end of this century and at a 10% growth it will be at 24,000,000.  I do not think that the US can grow at those rates per annum for the century and I think that this ETF is a good way to get exposure with little effort and energy try to understand political, currency, foreign economic and foreign business risk associated with each respective country.