another article from our favorite doom and gloomer, but it only mentions commodities, not gold specificly.
http://www.marketwatch.com/story/commod ... genumber=1
and another article that does mention gold in the last paragraph:
http://seekingalpha.com/article/193433- ... f-contango
and other that says DB shares are based on future contracts:
http://www.thestreet.com/story/10330652 ... tango.html
and yet another from ft times showing how to profit from gld contango:
http://ftalphaville.ft.com/blog/2010/07 ... -strategy/
I guess here's the bottom line, choose your etf wisely:
http://etfdb.com/2010/how-contango-impacts-etfs/
Gold
While futures markets for energy commodities often receive the most attention and are subject to the most thorough analysis, contango can have an impact on any commodity, and has historically been a component of total returns to precious metals exchange-traded products.
There are a handful of gold exchange-traded products out there that come in two main forms. Physically-backed gold ETFs, including the SPDR Gold Trust (GLD), iShares COMEX Gold Trust (IAU), and ETFS Physical Swiss Gold Shares (SGOL) buy and store gold bullion in secure vaults. Futures-based gold products, including the PowerShares DB Gold Fund (DGL) and UBS E-TRACS CMCI Gold Total Return (UBG), invest in gold futures to track the price of the precious metal.
Historically, these two strategies have shown a strong positive correlation, but some minor disconnects have developed. Since its launch in January 2007, DGL has delivered an average annual return of 19.6%, while GLD has gained 22.2% per year over that period. The gap between these funds is dwarfed by the differences arising in energy commodities, but is nevertheless significant.
Silver
Similar to gold, returns between physically backed silver funds and those that employ a futures-based strategy have been minimal over the last several years. Since its inception, the PowerShares DB Silver Fund (DBS) an average annual return of about 10.1%, while the iShares Silver Trust (SLV) is up 12.3% per annum over that period.