While supply and demand fundamentals surely account for most of the recent movements in commodity prices, some observers have attributed a significant portion of the run-up in prices to Federal Reserve policies, over and above the effects of those policies on U.S. economic growth.
For example, some have argued that accommodative U.S. monetary policy has driven down the foreign exchange value of the dollar, thereby boosting the dollar price of commodities. Indeed, since February 2009, the trade-weighted dollar has fallen by about 15 percent.