Roll Dates

Roll Dates are projected and subject to change without notice. Roll Dates are the expected dates on which the composition of the Benchmark Futures Contract is changed or ''rolled'' by selling the near month contract and buying the next month contract. The change occurs over four days.

Roll Start	Roll End
November 4, 2011	November 9, 2011
December 6, 2011	December 9, 2011
January 6, 2012	January 11, 2012
February 7, 2012	February 10, 2012
March 6, 2012	March 9, 2012
April 9, 2012	April 12, 2012
May 8, 2012	May 11, 2012
June 6, 2012	June 11, 2012
July 6, 2012	July 11, 2012
August 7, 2012	August 10, 2012
September 6, 2012	September 11, 2012
October 8, 2012	October 11, 2012
November 2, 2012	November 7, 2012
December 5, 2012	December 10, 2012

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For a copy of the Prospectus contact: ALPS Distributors, Inc., 1290 Broadway, Suite 1100, Denver, Colorado 80203 or call 800.920.0259 or click here .

USO is not a mutual fund or any other type of Investment Company within the meaning of the Investment Company Act of 1940, as amended, and is not subject to regulation thereunder.

Commodities and futures generally are volatile and are not suitable for all investors. USO is speculative and involves a high degree of risk. An investor may lose all or substantially all of an investment in USO. Funds that focus on a single sector generally experience greater volatility.

For further discussion of these and additional risks associated with an investment in USO units, click here.

Investing in USO subjects you to the risks of the oil industry. These risks could result in large fluctuations in the price of USO's units. An investor could lose all or substantially all of his/her investment.

The price of units may not accurately track the spot price of oil and you may not be able to effectively use USO as a way to hedge the risk of losses in your oil-related transactions or as a way to indirectly invest in oil.

Investors buy and sell units in the secondary market (i.e., not directly from USO). Only "authorized purchasers" may trade directly with USO, in minimum blocks of 100,000 units.

The United States Oil Fund is distributed by ALPS Distributors, Inc.