"Commodities are often seen as an inflation hedge; however, this is almost entirely due to the experience of the 1970s and the creation of OPEC, and the domination of energy in the generally used commodity indexes. If you had held the 'wrong' commodities, their inflation hedging performance would have looked very different (witness copper and grain)."
"Gold is often held up as an inflation hedge. However, the data provide a challenge to this view. [The next chart] shows the decade-by-decade average inflation rate, and the real return to holding gold over the same decade. It doesn't make pretty viewing for those who believe gold is an inflation hedge. That perception is down to one decade (the 1970s) when it held that inflation and gold were positively correlated. The rest of the time there isn't a good relationship between gold and inflation."