The following dropped into my inbox this morning – it shows the long term performance of the main DJ-UBS commodity indices. It makes a compelling case for the inclusion of commodities into any portfolio.The interesting thing about these indices is that they trade as equities – as such they give investors easy access to commodity markets in a format that can be understood. Traditionally the move into commodities markets required the setting up of an account with a futures broker and then dealing in individual commodities.