Most commodity index funds are far too dependent on the shape of the curve to give you the kind of exposure you're looking for. (aaii.com)
We measure this using a concept called inflation beta, which is a measure of sensitivity of commodity index returns to changes of inflation. (indexologyblog.com)
In addition, as in commodity indices, the liquidity of the underlying futures contracts as well as the costs associated with the rolling of the futures are also important considerations. (spvixviews.com)