United States Oil Fund - Fund Performance

Frequency Distribution of Discounts and Premiums
Bid/Offer Midpoint to NAV as of 9/30/2008

	Days at Discount			Days at Premium
Basis Points*	50-99	100-199	>200	50-99	100-199	>200
Quarter Ending: 9/30/2008	4	3	0	5	2	0
Quarter Ending: 6/30/2008	0	0	0	2	1	0
Quarter Ending: 3/31/2008	2	0	0	3	0	0
Quarter Ending: 12/31/2007	4	0	0	4	0	0

Past performance is not indicative of future results.
* A basis point is a unit that is equal to one hundredth of a percentage point (1/100th of 1%).

For a copy of the Prospectus contact:
ALPS Distributors, Inc., 1290 Broadway, Suite 1100, Denver, Colorado 80203 or call 1.800.920.0259 or Click Here.

This investment is not suitable for all investors.

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

Investing in oil interests subjects USO 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 United States Oil Fund is distributed by ALPS Distributors, Inc.