DESCRIPTION OF THE DEUTSCHE BANK LIQUID COMMODITY INDEX–OPTIMUM YIELD EXCESS RETURN^™ SECTOR

INDEXES

DBLCI^™ and Deutsche Bank Liquid Commodity Index^™ are trade marks of the Index Sponsor and are the subject of Community Trade Mark Nos. 3055043 and 3054996. Trade Mark applications in the United States are pending with respect to both the Trust and aspects of each Index. Any use of these marks must be with the consent of or under license from the Index Sponsor. The Fund, Master Fund and the Managing Owner have been licensed to use DBLCI^™ and Deutsche Bank Liquid Commodity Index^™. The Index Sponsor does not approve, endorse or recommend the Fund, the Master Fund or the Managing Owner.

General

The Deutsche Bank Liquid Commodity Index–Optimum Yield Excess Return^™, or DBLCI-OYER^™, is intended to reflect the changes in market value over time, positive or negative, in certain sectors of commodities, or an Index. Each Index is (i) calculated on an excess return, or unfunded basis and (ii) rolled in a manner which is aimed at potentially maximizing the roll benefits in backwardated markets and minimizing the losses from rolling in contangoed markets. Each Index is comprised of one or more underlying commodities, or Index Commodities. The composition of Index Commodities with respect to each Index varies according to each specific sector that such Index intends to reflect. Each Index Commodity is assigned a weight, or Index Base Weight, which is intended to reflect the proportion of such Index Commodity relative to each Index.

Indexes and Covered Sectors

The Indexes track the following sectors:

DBLCI-OY CL ER^™, DBLCI-OY GC ER^™ and DBLCI-OY SI ER^™ are Indexes with a single Index Commodity, or Single Commodity Sector Indexes.

Each Index has been calculated back to a base date, or Base Date. On the Base Date the closing level of each Index, or Closing Level, was 100.

The sponsor of each Index is Deutsche Bank AG London, or Index Sponsor.

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Composition of Indexes

Each Index, except each Single Commodity Sector Index, is composed of notional amounts of each of the underlying Index Commodities. Each Single Commodity Sector Index is composed of one underlying Index Commodity. The notional amount of each Index Commodity included in each multi-sector Index is intended to reflect the changes in market value of each such Index Commodity within the specific Index. The closing level of each Index is calculated on each business day by the Index Sponsor based on the closing price of the futures contracts for each of the underlying Index Commodities and the notional amounts of such Index Commodities.

Each Index, excluding each Single Commodity Sector Index, is rebalanced annually in November to ensure that each of the Index Commodities is weighted in the same proportion that such Index Commodities were weighted on the Base Date.

The composition of each Index may be adjusted in the event that the Index Sponsor is not able to calculate the closing prices of the Index Commodities.

Each Index includes provisions for the replacement of futures contracts as they approach maturity. This replacement takes place over a period of time in order to lessen the impact on the market for the futures contracts being replaced. With respect to each Index Commodity, the Master Fund employs a rule-based approach when it ‘rolls’ from one futures contract to another. Rather than select a new futures contract based on a predetermined schedule (e.g., monthly), each Index Commodity rolls to the futures contract which generates the best possible ‘implied roll yield.’ The futures contract with a delivery month within the next thirteen months which generates the best possible implied roll yield will be included in each Index. As a result, each Index Commodity is able to potentially maximize the roll benefits in backwardated markets and minimize the losses from rolling in contangoed markets.

In general, as a futures contract approaches its expiration date, its price will move towards the spot price in a contangoed market. Assuming the spot price does not change, this would result in the futures contract price decreasing and a negative implied roll yield. The opposite is true in a backwardated market.

Rolling in a contangoed market will tend to cause a drag on an Index Commodity’s contribution to the Fund’s return while rolling in a backwardated market will tend to cause a push on an Index Commodity’s contribution to the Fund’s return.

Each Index is calculated in USD on both an excess return (unfunded) and total return (funded) basis.

The futures contract price for each Index Commodity will be the exchange closing price for such Index Commodity on each weekday when banks in New York, New York are open, or Index Business Days. If a weekday is not an Exchange Business Day (as defined in the following sentence) but is an Index Business Day, the exchange closing price from the previous Index Business Day will be used for each Index Commodity. “Exchange Business Day” means, in respect of an Index Commodity, a day that is a trading day for such Index Commodity on the relevant exchange (unless either an Index disruption event or force majeure event has occurred).

On the first New York business day, or Verification Date, of each month, each Index Commodity futures contract will be tested in order to determine whether to continue including it in the applicable Index. If the Index Commodity futures contract requires delivery of the underlying commodity in the next month, known as the Delivery Month, a new Index Commodity futures contract will be selected for inclusion in such Index. For example, if the first New York business day is May 1, 2009, and the Delivery Month of the Index Commodity futures contract currently in such Index is June 2009, a new Index Commodity futures contract with a later Delivery Month will be selected.

For each underlying Index Commodity of an Index, the new Index Commodity futures contract selected will be the Index Commodity futures contract with the best possible “implied roll yield” based on the closing price for each eligible Index Commodity futures contract. Eligible Index Commodity futures contracts are any Index Commodity futures contracts having a Delivery Month (i) no sooner than the month after the Delivery Month of the Index Commodity futures contract currently in such Index, and (ii) no later than the 13^th month after the Verification Date. For example, if the first New York business day is

May 1, 2009 and the Delivery Month of an Index Commodity futures contract currently in an Index is therefore June 2009, the Delivery Month of an eligible new Index Commodity futures contract must be between July 2009 and July 2010. The implied roll yield is then calculated and the futures contract on the Index Commodity with the best possible implied roll yield is then selected. If two futures contracts have the same implied roll yield, the futures contract with the minimum number of months prior to the Delivery Month is selected.

After the futures contract selection, the monthly roll for each Index Commodity subject to a roll in that particular month unwinds the old futures contract and enters a position in the new futures contract. This takes place between the 2^nd and 6 ^th Index Business Day of the month.

On each day during the roll period, new notional holdings are calculated. The calculations for the old Index Commodities that are leaving an Index and the new Index Commodities are then calculated.

On all days that are not monthly index roll days, the notional holdings of each Index Commodity future remains constant.

Each Index is re-weighted on an annual basis on the 6^th Index Business Day of each November.

The calculation of each Index is expressed as the weighted average return of the Index Commodities.

Change in the Methodology of an Index

The Index Sponsor employs the methodology described above and its application of such methodology shall be conclusive and binding. While the Index Sponsor currently employs the above described methodology to calculate each Index, no assurance can be given that fiscal, market, regulatory, juridical or financial circumstances (including, but not limited to, any changes to or any suspension or termination of or any other events affecting any Index Commodity or a futures contract) will not arise that would, in the view of the Index Sponsor, necessitate a modification of or change to such methodology and in such circumstances the Index Sponsor may make any such modification or change as it determines appropriate. The Index Sponsor may also make modifications to the terms of an Index in

any manner that it may deem necessary or desirable, including (without limitation) to correct any manifest or proven error or to cure, correct or supplement any defective provision of an Index. The Index Sponsor will publish notice of any such modification or change and the effective date thereof as set forth below.

Publication of Closing Levels and Adjustments

In order to calculate each indicative Index level, the Index Sponsor polls Reuters every 15 seconds to determine the real time price of each underlying futures contract with respect to each Index Commodity of the applicable Index. The Index Sponsor then applies a set of rules to these values to create the indicative level of each Index. These rules are consistent with the rules which the Index Sponsor applies at the end of each trading day to calculate the closing level of each Index. A similar polling process is applied to the U.S. Treasury bills to determine the indicative value of the U.S. Treasury bills held by the Fund every 15 seconds throughout the trading day.

The intra-day indicative value per Share of each Fund is calculated by adding the intra-day U.S. Treasury bills level plus the intra-day level of the applicable Index which will then be applied to the last published net asset value of such Fund, less accrued fees.

The Index Sponsor publishes the closing level of each Index daily. The Managing Owner publishes the net asset value of each Fund and the net asset value per Share of each Fund daily. Additionally, the Index Sponsor publishes the intra-day Index level, and the Managing Owner publishes the indicative value per Share of each Fund (quoted in U.S. dollars) once every fifteen seconds throughout each trading day. All of the foregoing information is published as follows:

The current trading price per Share of each Fund (quoted in U.S. dollars) will be published continuously under its ticker symbol as trades occur throughout each trading day on the consolidated tape, Reuters and/or Bloomberg and on the Managing Owner’s website at http://www.dbfunds.db.com, or any successor thereto.

The most recent end-of-day closing level of each Index is published under its own symbol as of the close of business for the Amex each trading day

on the consolidated tape, Reuters and/or Bloomberg and on the Managing Owner’s website at http://www.dbfunds.db.com, or any successor thereto. The most recent end-of-day net asset value of each Fund is published under its own symbol as of the close of business on Reuters and/or Bloomberg and on the Managing Owner’s website at http://www.dbfunds.db.com, or any successor thereto. In addition, the most recent end-of-day net asset value of each Fund is published the following morning on the consolidated tape.

End of Day Index Closing Level Symbols; End-of-Day Net Asset Value Symbols

PowerShares DB Energy Fund. The end-of-day closing level of the DBLCI-OY Energy ER is published under the symbol DBENIX. The end-of-day net asset value of PowerShares DB Energy Fund is published under the symbol DBE.NV.

PowerShares DB Oil Fund. The end-of-day closing level of the DBLCI-OY CL ER is published under the symbol DBOLIX. The end-of-day net asset value of PowerShares DB Oil Fund is published under the symbol DBO.NV.

PowerShares DB Precious Metals Fund. The end-of-day closing level of the DBLCI-OY Precious Metals ER is published under the symbol DBPMIX. The end-of-day net asset value of PowerShares DB Precious Metals Fund is published under the symbol DBP.NV.

PowerShares DB Gold Fund. The end-of-day closing level of the DBLCI-OY GC ER is published under the symbol DGLDIX. The end-of-day net asset value of PowerShares DB Gold Fund is published under the symbol DGL.NV.

PowerShares DB Silver Fund. The end-of-day closing level of the DBLCI-OY SI ER is published under the symbol DBSLIX. The end-of-day net asset value of PowerShares DB Silver Fund is published under the symbol DBS.NV.

PowerShares DB Base Metals Fund. The end-of-day closing level of the DBLCI-OY Industrial Metals ER is published under the symbol DBBMIX. The end-of-day net asset value of PowerShares DB Base Metals Fund is published under the symbol DBB.NV.

PowerShares DB Agriculture Fund. The end-of-day closing level of the DBLCI-OY Agriculture ER is published under the symbol DBAGIX. The end-of-day net asset value of PowerShares DB Agriculture Fund is published under the symbol DBA.NV.

The Managing Owner publishes the net asset value of each Fund and the net asset value per Share of each Fund daily. Additionally, the Index Sponsor publishes the intra-day level of each Index, and the Managing Owner publishes the indicative value per Share of each Fund (quoted in U.S. dollars) once every fifteen seconds throughout each trading day on the consolidated tape, Reuters and/or Bloomberg and on the Managing Owner’s website at http://www.dbfunds.db.com, or any successor thereto. All of the foregoing information is published under the following symbols:

Intra-Day Index Level Symbols and Intra-Day Indicative Values Per Share Symbols

PowerShares DB Energy Fund. The intra-day index level of the DBLCI-OY Energy ER is published under the symbol DBENIX. The intra-day indicative value per Share of PowerShares DB Energy Fund is published under the symbol DBE.IV.

PowerShares DB Oil Fund. The intra-day index level of the DBLCI-OY CL ER is published under the symbol DBOLIX. The intra-day indicative value per Share of PowerShares DB Oil Fund is published under the symbol DBO.IV.

PowerShares DB Precious Metals Fund. The intra-day index level of the DBLCI-OY Precious Metals ER is published under the symbol DBPMIX. The intra-day indicative value per Share of PowerShares DB Precious Metals Fund is published under the symbol DBP.IV.

PowerShares DB Gold Fund. The intra-day index level of the DBLCI-OY GC ER is published under the symbol DGLDIX. The intra-day indicative value per Share of PowerShares DB Gold Fund is published under the symbol DGL.IV.

PowerShares DB Silver Fund. The intra-day index level of the DBLCI-OY SI ER is published under the symbol DBSLIX. The intra-day indicative value per Share of PowerShares DB Silver Fund is published under the symbol DBS.IV.

PowerShares DB Base Metals Fund. The intra-day index level of the DBLCI-OY Industrial Metals ER is published under the symbol DBBMIX. The intra-day indicative value per Share of PowerShares DB Base Metals Fund is published under the symbol DBB.IV.

PowerShares DB Agriculture Fund. The intra-day index level of the DBLCI-OY Agriculture ER is published under the symbol DBAGIX. The intra-day indicative value per Share of PowerShares DB Agriculture Fund is published under the symbol DBA.IV.

Each Index’s history is also available at https://index.db.com.

The Index Sponsor obtains information for inclusion in, or for use in the calculation of, the Indexes from sources the Index Sponsor considers reliable. None of the Index Sponsor, the Managing Owner, the Funds, the Master Funds or any of their respective affiliates accepts responsibility for or guarantees the accuracy and/or completeness of any of the Indexes or any data included in any of the Indexes.

All of the foregoing information with respect to each Index is also published at https://index.db.com.

The Index Sponsor publishes any adjustments made to each Index on the Managing Owner’s website http://www.dbfunds.db.com and https://index.db.com, or any successor thereto.

Interruption of Index Calculation

Calculation of each Index may not be possible or feasible under certain events or circumstances, including, without limitation, a systems failure, natural or man-made disaster, act of God, armed conflict, act of terrorism, riot or labor disruption or any similar intervening circumstance, that is beyond the reasonable control of the Index Sponsor and that the Index Sponsor determines affects an Index or any Index Commodity. Upon the occurrence of such force majeure events, the Index Sponsor may, in its discretion, elect one (or more) of the following options:

Additionally, calculation of an Index may also be disrupted by an event that would require the Index Sponsor to calculate the closing price in respect of the relevant Index Commodity on an alternative basis were such event to occur or exist on a day that is a trading day for such Index Commodity on the relevant exchange. If such an Index disruption event in relation to an Index Commodity as described in the prior sentence occurs and continues for a period of five successive trading days for such Index Commodity on the relevant exchange, the Index Sponsor will, in its discretion, either

Historical Closing Levels

Set out below are the Closing Levels and related data with respect to each Index as of February 28, 2009.

With respect to each of the Closing Levels Tables, historic daily Index Closing Levels have been calculated with respect to each Index since the Base Date of each Index.

The Base Date for each Index is as follows:

Each Base Date was selected by the Index Sponsor based on the availability of price data with respect to the relevant underlying futures contracts on the Index Commodities of each Index.

Since March 2003, the historic data with respect to the closing prices of futures contracts on Light, Sweet Crude Oil (CL), Heating Oil (HO), Wheat (W), Corn (C), Gold (GC) and Aluminum (MAL) originated from Reuters. Prior to March 2003, the closing prices of futures contracts on CL, HO, W, C, GC and MAL were obtained from publicly available information from Logical Information Machines (http://www.lim.com), Bloomberg and Reuters. The Index Sponsor has not independently verified the information extracted from these sources. The Index calculation methodology and commodity future selection are the same prior to and following March 2003.

Since June 2006, the historic data with respect to the closing prices of futures contracts on Brent Crude Oil (LCO), RBOB Gasoline (XB), Natural Gas (NG), Silver (SI), Zinc (MZN), Copper—Grade A (MCU), Soybeans (S) and Sugar (SB) originated from Reuters. Prior to June 2006, the closing prices of futures contracts on LCO, XB, NG, SI, MZN, MCU, S and SB were obtained from publicly available information from Logical Information Machines (http://www.lim.com), Bloomberg and Reuters. The Index Sponsor has not independently verified the information extracted from these sources. The Index calculation methodology and commodity future selection are the same prior to and following June 2006.

The Index Sponsor used the return of Unleaded Gasoline (traded on the NYMEX under the symbol “HU”) as a proxy with respect to XB prior to November 2005. On and after November 2005, the Index Sponsor obtained historic data from Reuters with respect to XB. The Index Sponsor considers the use of HU as a proxy for XB prior to November 2005 to be appropriate because XB and HU are sufficiently similar in nature.

Complete price histories regarding certain futures contracts on the Index Commodities were not available (e.g., due to lack of trading on specific days). In the event that prices on such futures contracts on the Index Commodities were unavailable during a contract selection day, such futures contracts

were excluded from the futures contract selection process. The Index Sponsor believes that the incomplete price histories should not have a material impact on the calculation of any of the Indexes.

Each Index Closing Level is equal to the weighted sum of the market value of the commodity futures contracts of all the respective Index Commodities that comprise each specific Index. The market value of the commodity futures contracts of an Index Commodity is equal to the number of commodity futures contracts of an Index Commodity held multiplied by the commodity futures contracts closing price of an Index Commodity.

The weight of each Index Commodity of a specific Index is linked to the number of commodity futures contracts held of such Index Commodity and the price of commodity futures contracts of the Index Commodity. The weight of an Index Commodity is defined as the market value of the commodity futures contracts of the Index Commodity divided by the sum of all market values of all commodity futures contracts of the Index Commodities that comprise and Index multiplied by 100%.

The Index Commodities Weights Tables reflect the range of the weightings with respect to each of the Index Commodities used to calculate each Index.

The Index rules stipulate the holding in each Index Commodity futures contract. Holdings in each Index Commodity change during the Index rebalancing periods as determined by the optimum yield roll rules.

Cautionary Statement–Statistical Information

Various statistical information is presented on the following pages, relating to the Closing Levels of each Index, on an annual and cumulative basis, including certain comparisons of each Index to other commodities indices. In reviewing such information, prospective investors should consider that:

For example, the “Worst Peak-to-Valley Drawdown” of each Index, represents the greatest percentage decline from any month-end Closing Level, without such Closing Level being equaled or exceeded as of a subsequent month-end, which occurred during the above-listed time period.

The “Worst Monthly Drawdown” of each Index occurred during the above-listed month and year.

See “Volatility of the Various Indexes” on page 46.

WHILE EACH FUND’S OBJECTIVE IS NOT TO GENERATE PROFIT THROUGH ACTIVE PORTFOLIO MANAGEMENT, BUT IS TO TRACK THE CORRESPONDING INDEX, BECAUSE EACH INDEX WAS ESTABLISHED BETWEEN MAY-JULY 2006, CERTAIN INFORMATION RELATING TO INDEX CLOSING LEVELS MAY BE CONSIDERED TO BE “HYPOTHETICAL.” HYPOTHETICAL INFORMATION MAY HAVE CERTAIN INHERENT LIMITATIONS, SOME OF WHICH ARE DESCRIBED BELOW.

NO REPRESENTATION IS BEING MADE THAT EACH INDEX WILL OR IS LIKELY TO ACHIEVE ANNUAL OR CUMULATIVE CLOSING LEVELS CONSISTENT WITH OR SIMILAR TO THOSE SET FORTH HEREIN. SIMILARLY, NO REPRESENTATION IS BEING MADE THAT EACH FUND WILL GENERATE PROFITS OR LOSSES SIMILAR TO THE FUND’S PAST PERFORMANCE, WHEN AVAILABLE, OR THE HISTORICAL ANNUAL OR CUMULATIVE CHANGES IN THE CORRESPONDING INDEX CLOSING LEVELS. IN FACT, THERE ARE FREQUENTLY SHARP DIFFERENCES BETWEEN HYPOTHETICAL RESULTS AND THE ACTUAL RESULTS SUBSEQUENTLY ACHIEVED BY INVESTMENT METHODOLOGIES, WHETHER ACTIVE OR PASSIVE.

ONE OF THE LIMITATIONS OF HYPOTHETICAL INFORMATION IS THAT IT IS GENERALLY PREPARED WITH THE BENEFIT

OF HINDSIGHT. TO THE EXTENT THAT INFORMATION PRESENTED HEREIN RELATES TO THE PERIOD SINCE INCEPTION WITH RESPECT TO EACH INDEX THROUGH MAY-JULY 2006, AS APPLICABLE, EACH INDEX’S CLOSING LEVELS REFLECT THE APPLICATION OF THE INDEX’S METHODOLOGY, AND SELECTION OF INDEX COMMODITIES, IN HINDSIGHT.

NO HYPOTHETICAL RECORD CAN COMPLETELY ACCOUNT FOR THE IMPACT OF FINANCIAL RISK IN ACTUAL TRADING. FOR EXAMPLE, THERE ARE NUMEROUS FACTORS, INCLUDING THOSE DESCRIBED UNDER “THE RISKS YOU FACE” HEREIN, RELATED TO THE COMMODITIES MARKETS IN GENERAL OR TO THE IMPLEMENTATION OF EACH FUND’S EFFORTS TO TRACK ITS CORRESPONDING INDEX OVER TIME WHICH CANNOT BE, AND HAVE NOT BEEN, ACCOUNTED FOR IN THE PREPARATION OF SUCH INDEX INFORMATION SET FORTH ON THE FOLLOWING PAGES, ALL OF WHICH CAN ADVERSELY AFFECT ACTUAL PERFORMANCE RESULTS FOR EACH FUND. FURTHERMORE, THE INDEX INFORMATION DOES NOT INVOLVE FINANCIAL RISK OR ACCOUNT FOR THE IMPACT OF FEES AND COSTS ASSOCIATED WITH EACH FUND.

THE MANAGING OWNER HAS HAD LIMITED EXPERIENCE IN TRADING ACTUAL ACCOUNTS FOR ITSELF OR FOR CLIENTS. BECAUSE THERE ARE NO ACTUAL TRADING RESULTS TO COMPARE TO THE INDEX CLOSING LEVELS SET FORTH HEREIN, PROSPECTIVE INVESTORS SHOULD BE PARTICULARLY WARY OF PLACING UNDUE RELIANCE ON THE ANNUAL OR CUMULATIVE INDEX RESULTS.

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