The iPath Dow Jones-AIG Commodity Index Total Return ETN (Ticker: DJP) is linked to the Dow Jones-AIG Commodity Index Total Return and reflects the returns that are potentially available through an unleveraged investment in the futures contracts on physical commodities comprising the index plus the rate of interest that could be earned on cash collateral invested in specified Treasury Bills. Sector components include: Energy, Agriculture, Industrial Metals, Precious Metals, Livestock. The index is composed of futures contracts on 19 physical commodities. To determine its component weightings, the index relies primarily on liquidity data, or the relative amount of trading activity of a particular commodity. All data used in both the liquidity and production calculations is averaged over a five-year period. The component weightings are also determined by several rules designed to insure diversified commodity exposure: 1) No related group of commodities (e.g., energy, precious metals, livestock and grains) may constitute more than 33% of the index as of the annual reweightings of the components. 2) No single commodity may constitute less than 2% or more than 15% of the index. In order to avoid delivery and maintain a long futures position, nearby contracts must be sold and contracts that have not yet reached the delivery period must be purchased. This process is known as "rolling" a futures position. The index is rebalanced annually.