After a fairly flat period in the 1990s, the index leapt upward beginning in the early 2000s. The context explains the jump: High inflation, weak dollar and low interest rates. From 2001 to 2007, the dollar lost 41 percent of its value, and all commodities priced in dollars skyrocketed. At the same time, China began a huge expansion of its infrastructure, transportation, housing and manufacturing sectors. The BCOM index moved from around 90 to almost 240.
You know the rest of the story: Inflation is nowhere to be found, and the Federal Open Market Committee is concerned about deflation. The dollar is at multiyear highs against just about any other currency. Commodity prices have suffered as a result.
Continues here: Why Commodities Are Back in the 1990s