From Etfdb.com: As the ETF world has surged ahead in recent years, perhaps no corner of the industry has generated as much interest as the commodity space. The introduction and proliferation of exchange-traded commodity products has granted many investors access to a section of the investable universe that was previously beyond their reach.
The democratization of an asset class with the potential to add valuable diversification benefits to traditional stock-and-bond portfolios has been met with open arms–and open wallets. Inflows to commodity ETFs topped $30 billion in 2009, and the cash flows have remained strong for much of this year as well……………………………………….Full Article: Source