Fund Investment Overview

3 Months Ended

Mar. 31, 2016

Organization Consolidation And Presentation Of Financial Statements [Abstract]

Fund Investment Overview

(3) Fund Investment Overview

The Fund invests with a view to tracking the changes, whether positive or negative, in the level of the DBIQ Optimum Yield Industrial Metals Index Excess Return™ (the “Index”) over time, plus the excess, if any, of the Fund’s interest income from its holdings of United States Treasury Obligations over the expenses of the Fund.

The Index is intended to reflect the change in market value of the base metals sector. The commodities comprising the Index are aluminum, zinc and copper—Grade A (each an “Index Commodity”, and collectively, the “Index Commodities”).

The Index Commodities are currently trading on the London Metals Exchange (the “LME”). Although the LME does not currently impose position limits on the Index Commodities, the LME may in the future impose position limits on market participants trading in certain commodities included in the Index. Further, in the event the Fund invests in alternative commodity futures contracts as described below, that trade on a U.S. exchange, the Commodity Futures Trading Commission (the “CFTC”) and commodity exchanges may impose position limits on market participants trading in the commodities futures contracts included in the Index. The Index is comprised of commodity futures contracts on the Index Commodities that expire in a specific month and trade on a specific exchange (the “Index Contracts”). As disclosed in the Prospectus, if the Managing Owner determines in its commercially reasonable judgment that it has become impracticable or inefficient for any reason for the Fund to gain full or partial exposure to any Index Commodity by investing in a specific Index Contract, the Fund may invest in a commodities futures contract referencing the particular Index Commodity other than the Index Contract or, in the alternative, invest in other commodities futures contracts not based on the particular Index Commodity if, in the commercially reasonable judgment of the Managing Owner, such commodities futures contracts tend to exhibit trading prices that correlate with such Index Commodity.