Gubinec is correct, inflation can only lead commodity prices. As I have stated on other threads on several occassions, inflation is generally misunderstood. People confuse the imperfect measures we use for inflation, price change index measures, with inflation itself. There are other forces that drive prices to change beside inflation. A price change measure, a commodity index, can be driven by other dynamics beside inflation. Price change indexes simply measure price change badly, they don't distinguish if the change is caused by inflation or by suppy/demand imbalance, or by some government or other market sector dominating activity. Price change caused by inflation does have a distinct foot finger print however. Inflation is characterised by an expansion of private credit that facilitaties an aggregate flow of capital from financial assets to tangible assets. Independent economic actors on the micro level begin en mass to cash in thier financial assets and use them along with debt to acquire tangible assets. The other thing about inflation is that it is a monetary phenomenon in that it relates to a currency, the currency becomes worth less relative to the price of tangible assets and eventually all goods and services depending on the expiration of pre existing contracts.
When we look at the situation in the U.S. today, there is a mixed bag of evidence for supposed inflation. Certainly, international commodity prices denominated in dollars are lately elevated. On the other hand prices for domestic real estate, both residential and commercial, automobiles, both new and used, boats, furniture, antiques, and most durable goods continue to decline or seem to languish at historically low prices. More importantly, private credit has been contracting for over 20 months and continues to contract contributing to the loss of value in previously leveraged assets. We also see that unemployment remains high and wages at many skill levels have declined and continue to decline. This is of courese not a picture of emergent domestic inflation...flow is out of tangible assets in the context of a credit contraction.
Part of the answer to the apparent contradiction of commodity price behavior and U.S. domestic inflation lies in the use of the U.S. dollar as international reserve currency for trade. The rest of the world (ROW) outside of the U.S., Japan and most of Europe, have expanding private credit markets and growing GDPs. A lot of the dollar expansion that the U.S. Fed has been applying to reflate our domestic economy has been showing up in the ROW. These dollars are fueling credit expansion inflation...but not in the U.S. where they are trapped in the bankinig system due to aggregated private credit contraction. Some Chineese with excess capital have been buying metals and storing them in farm fields as an inflation hedge...they have been borrowing and buying apartments for the same reason. So, the ccommodity demand may in fact be driven by inflation that may in fact be sourced in expanded dollar supply but the effect of the inflation is expressed in ROW and not Domestically...nonetheless this dyanamic does push up the price of commodities.