<SEC-DOCUMENT>0001144204-11-027908.txt : 20110511
<SEC-HEADER>0001144204-11-027908.hdr.sgml : 20110511
<ACCEPTANCE-DATETIME>20110511072730
ACCESSION NUMBER:		0001144204-11-027908
CONFORMED SUBMISSION TYPE:	424B3
PUBLIC DOCUMENT COUNT:		3
FILED AS OF DATE:		20110511
DATE AS OF CHANGE:		20110511

FILER:

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			United States Brent Oil Fund, LP
		CENTRAL INDEX KEY:			0001472494
		STANDARD INDUSTRIAL CLASSIFICATION:	 [6221]
		IRS NUMBER:				270925904
		STATE OF INCORPORATION:			DE
		FISCAL YEAR END:			1231

	FILING VALUES:
		FORM TYPE:		424B3
		SEC ACT:		1933 Act
		SEC FILE NUMBER:	333-162015
		FILM NUMBER:		11830166

	BUSINESS ADDRESS:	
		STREET 1:		1320 HARBOR BAY PARKWAY
		STREET 2:		SUITE 145
		CITY:			ALAMEDA
		STATE:			CA
		ZIP:			94502
		BUSINESS PHONE:		(510) 522-9600

	MAIL ADDRESS:	
		STREET 1:		1320 HARBOR BAY PARKWAY
		STREET 2:		SUITE 145
		CITY:			ALAMEDA
		STATE:			CA
		ZIP:			94502
</SEC-HEADER>
<DOCUMENT>
<TYPE>424B3
<SEQUENCE>1
<FILENAME>v221911_424b3.htm
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<DIV  STYLE="width: 100%; display: inline; vertical-align: middle; border-top: 4pt black double">&nbsp;</DIV><P STYLE="text-indent:0pt; text-align: right; font-family: serif; font-size: 10pt; line-height: 12pt; font-style: normal; font-variant: normal; font-weight: normal; text-transform: none; padding-top: 3pt; padding-right: 0pt; padding-left: 4px; padding-bottom: 3pt; margin-top: 0pt; margin-right: 0pt; margin-left: 0pt; margin-bottom: 0pt">Filed pursuant to Rule 424(b)(3)<BR> File No. 333-162015 </P>

<H1 STYLE="text-indent:0pt; text-align: center; font-family: serif; font-size: 18pt; line-height: 20pt; font-style: normal; font-variant: normal; font-weight: bold; text-transform: none; padding-top: 9pt; padding-right: 0pt; padding-left: 0pt; padding-bottom: 3pt; margin-top: 0pt; margin-right: 0pt; margin-left: 0pt; margin-bottom: 0pt">UNITED STATES BRENT OIL FUND, LP </H1>


<DIV ALIGN="CENTER"><BR><IMG SRC="line.gif" ALIGN="MIDDLE" STYLE="width: 180px; height: 1pt; text-align: center"><BR>&nbsp;</DIV>

<P STYLE="text-indent:0pt; text-align: center; font-family: serif; font-size: 10pt; line-height: 12pt; font-style: normal; font-variant: normal; font-weight: normal; text-transform: none; padding-top: 3pt; padding-right: 0pt; padding-left: 4px; padding-bottom: 3pt; margin-top: 0pt; margin-right: 0pt; margin-left: 0pt; margin-bottom: 0pt">Supplement dated May 11, 2011<BR> to<BR> Prospectus dated April 29, 2011 </P>


<DIV ALIGN="CENTER"><BR><IMG SRC="line.gif" ALIGN="MIDDLE" STYLE="width: 180px; height: 1pt; text-align: center"><BR>&nbsp;</DIV>

<P STYLE="text-indent:20px; text-align: left; font-family: serif; font-size: 10pt; line-height: 12pt; font-style: normal; font-variant: normal; font-weight: normal; text-transform: none; padding-top: 3pt; padding-right: 0pt; padding-left: 4px; padding-bottom: 3pt; margin-top: 0pt; margin-right: 0pt; margin-left: 0pt; margin-bottom: 0pt">This supplement contains information which amends, supplements or modifies certain information contained in the Prospectus of United States Brent Oil Fund, LP dated April 29, 2011. </P>

<P STYLE="text-indent:20px; text-align: left; font-family: serif; font-size: 10pt; line-height: 12pt; font-style: normal; font-variant: normal; font-weight: normal; text-transform: none; padding-top: 3pt; padding-right: 0pt; padding-left: 4px; padding-bottom: 3pt; margin-top: 0pt; margin-right: 0pt; margin-left: 0pt; margin-bottom: 0pt"><I>You should carefully consider the &#147;Risk Factors&#148; beginning on page 12 of the Prospectus before you decide to invest.</I></P>

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<P STYLE="width: 708px; text-indent:0px; text-align: center; font-family: serif; font-size: 10pt; line-height: 12pt; font-style: normal; font-variant: normal; font-weight: normal; color: black; text-transform: none; text-decoration: none; padding-top: 12pt; padding-right: 0pt; padding-left: 0pt; padding-bottom: 3pt; margin-top: 0pt; margin-right: 0pt; margin-left: 0pt; margin-bottom: 0pt">&nbsp;</P>

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<P STYLE="text-align: left; font-family: serif; font-size: 8pt; font-style: normal; font-variant: normal; font-weight: bold"></P>

<H2 STYLE="text-indent:0pt; text-align: left; font-family: serif; font-size: 10pt; line-height: 12pt; font-style: normal; font-variant: normal; font-weight: bold; text-transform: none; padding-top: 5pt; padding-right: 0pt; padding-left: 4px; padding-bottom: 3pt; margin-top: 0pt; margin-right: 0pt; margin-left: 0pt; margin-bottom: 0pt">Cover Page </H2>

<P STYLE="text-indent:0pt; text-align: left; font-family: serif; font-size: 10pt; line-height: 12pt; font-style: normal; font-variant: normal; font-weight: normal; text-transform: none; padding-top: 3pt; padding-right: 0pt; padding-left: 4px; padding-bottom: 3pt; margin-top: 0pt; margin-right: 0pt; margin-left: 0pt; margin-bottom: 0pt"><I>This supplement replaces the table at the bottom of the cover page of the Prospectus pertaining to the price of the units based on closing net asset value on April 28, 2011 with the following:</I> </P>

<P STYLE="text-indent:0pt; text-align: left; font-family: serif; font-size: 10pt; line-height: 12pt; font-style: normal; font-variant: normal; font-weight: normal; text-transform: none; padding-top: 3pt; padding-right: 0pt; padding-left: 4px; padding-bottom: 3pt; margin-top: 0pt; margin-right: 0pt; margin-left: 0pt; margin-bottom: 0pt"></P>

<DIV style="text-align: center"><TABLE CELLSPACING="0" CELLPADDING="0" WIDTH="554" STYLE="vertical-align: text-bottom; text-indent:0px; text-align: left; font-family: serif; font-size: 10pt; font-style: normal; font-variant: normal; font-weight: normal; text-transform: none; padding-top: 3pt; padding-right: 0pt; padding-left: 0pt; padding-bottom: 3pt; margin-top: -24pt; margin-right: 0pt; margin-left: 0pt; margin-bottom: 0pt">

<TR>

          <TD><IMG HEIGHT="1" SRC="spacer.gif" WIDTH="386"></TD>

          <TD STYLE="width: 12px; vertical-align: text-bottom; text-align: center; border-bottom: none"><!-- GUTTER -->&nbsp;</TD>

          <TD COLSPAN="3"><IMG HEIGHT="1" SRC="spacer.gif" WIDTH="64"></TD>

          <TD STYLE="width: 12px; vertical-align: text-bottom; text-align: center; border-bottom: none"><!-- GUTTER -->&nbsp;</TD>

          <TD COLSPAN="3"><IMG HEIGHT="1" SRC="spacer.gif" WIDTH="72"></TD>

</TR>

<TR>

          <TD STYLE="line-height: normal; vertical-align: text-bottom; font-weight: bold; font-size: 8pt; text-align: left" ROWSPAN=1 COLSPAN=1></TD>

          <TD STYLE="width: 6px; vertical-align: text-bottom; text-align: center" ROWSPAN=1><!-- GUTTER -->&nbsp;</TD>

          <TD STYLE="line-height: normal; vertical-align: text-bottom; font-weight: bold; font-size: 8pt; text-align: center; border-bottom: 1pt solid black" ROWSPAN=1 COLSPAN=3>Per Unit</TD>

          <TD STYLE="width: 6px; vertical-align: text-bottom; text-align: center" ROWSPAN=1><!-- GUTTER -->&nbsp;</TD>

          <TD STYLE="line-height: normal; vertical-align: text-bottom; font-weight: bold; font-size: 8pt; text-align: center; border-bottom: 1pt solid black" ROWSPAN=1 COLSPAN=3>Per Basket</TD>

</TR>

<TR STYLE="background-color: #CCFFCC">

          <TD STYLE="padding-left: 10pt; text-indent: -10pt; vertical-align: text-bottom" ROWSPAN=1 COLSPAN=1>Price of the units*</TD>

          <TD STYLE="width: 6px; vertical-align: text-bottom; text-align: center" ROWSPAN=1><!-- GUTTER -->&nbsp;</TD>

          <TD STYLE="width: 6px; vertical-align: text-bottom; text-align: left" ROWSPAN=1><!-- $ -->$</TD>

          <TD STYLE="vertical-align: text-bottom; text-align: right" ROWSPAN=1 COLSPAN=1>83.13</TD>

          <TD STYLE="white-space: nowrap; vertical-align: text-bottom; text-align: left"><!-- PERCENT -->&nbsp;</TD>

          <TD STYLE="width: 6px; vertical-align: text-bottom; text-align: center" ROWSPAN=1><!-- GUTTER -->&nbsp;</TD>

          <TD STYLE="width: 6px; vertical-align: text-bottom; text-align: left" ROWSPAN=1><!-- $ -->$</TD>

          <TD STYLE="vertical-align: text-bottom; text-align: right" ROWSPAN=1 COLSPAN=1>8,313,000</TD>

          <TD STYLE="white-space: nowrap; vertical-align: text-bottom; text-align: left"><!-- PERCENT -->&nbsp;</TD>

</TR>

</TABLE></DIV>


<P STYLE="text-align: left; text-indent: 1px"><IMG SRC="line.gif" STYLE="width: 72px; height: 1pt"></P>

<TABLE CELLSPACING="0" CELLPADDING="0" WIDTH="100%" STYLE="text-indent:0px; text-align: left; font-family: serif; font-size: 10pt; line-height: 12pt; font-style: normal; font-variant: normal; font-weight: normal; text-transform: none; padding-top: 3pt; padding-right: 0pt; padding-left: 0pt; padding-bottom: 3pt; margin-top: 0pt; margin-right: 0pt; margin-left: 0pt; margin-bottom: 0pt">

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          <TD STYLE="width: 1px"></TD>

          <TD STYLE="width: 20px; text-align: left">*</TD>

          <TD STYLE="text-align: left">Based on closing net asset value on April 28, 2011. The price may vary based on the net asset value on a particular day. </TD>

</TR>

</TABLE>

<H2 STYLE="text-indent:0pt; text-align: left; font-family: serif; font-size: 10pt; line-height: 12pt; font-style: normal; font-variant: normal; font-weight: bold; text-transform: none; padding-top: 5pt; padding-right: 0pt; padding-left: 4px; padding-bottom: 3pt; margin-top: 0pt; margin-right: 0pt; margin-left: 0pt; margin-bottom: 0pt">Breakeven Analysis (page 8) </H2>

<P STYLE="text-indent:0pt; text-align: left; font-family: serif; font-size: 10pt; line-height: 12pt; font-style: normal; font-variant: normal; font-weight: normal; text-transform: none; padding-top: 3pt; padding-right: 0pt; padding-left: 4px; padding-bottom: 3pt; margin-top: 0pt; margin-right: 0pt; margin-left: 0pt; margin-bottom: 0pt"><I>This supplement replaces the breakeven analysis table and related footnotes with the following:</I> </P>

<H2 STYLE="text-indent:0pt; text-align: left; font-family: serif; font-size: 10pt; line-height: 12pt; font-style: normal; font-variant: normal; font-weight: bold; text-transform: none; padding-top: 5pt; padding-right: 0pt; padding-left: 4px; padding-bottom: 3pt; margin-top: 0pt; margin-right: 0pt; margin-left: 0pt; margin-bottom: 0pt">Breakeven Analysis </H2>

<P STYLE="text-indent:0pt; text-align: left; font-family: serif; font-size: 10pt; line-height: 12pt; font-style: normal; font-variant: normal; font-weight: normal; text-transform: none; padding-top: 3pt; padding-right: 0pt; padding-left: 4px; padding-bottom: 3pt; margin-top: 0pt; margin-right: 0pt; margin-left: 0pt; margin-bottom: 0pt">The breakeven analysis below indicates the approximate dollar returns and percentage required for the redemption value of a hypothetical investment in a single unit to equal the amount invested twelve months after the investment was made. For purposes of this breakeven analysis, we have assumed an initial selling price per unit of $83.13, which equals the net asset value per unit on April 28, 2011. This breakeven analysis refers to the redemption of baskets by Authorized Purchasers and is not related to any gains an individual investor would have to achieve in order to break even. The breakeven analysis is an approximation only. </P>

<P STYLE="text-indent:0pt; text-align: left; font-family: serif; font-size: 10pt; line-height: 12pt; font-style: normal; font-variant: normal; font-weight: normal; text-transform: none; padding-top: 3pt; padding-right: 0pt; padding-left: 4px; padding-bottom: 3pt; margin-top: 0pt; margin-right: 0pt; margin-left: 0pt; margin-bottom: 0pt"></P>

<DIV style="text-align: center"><TABLE CELLSPACING="0" CELLPADDING="0" WIDTH="608" STYLE="vertical-align: text-bottom; text-indent:0px; text-align: left; font-family: serif; font-size: 10pt; font-style: normal; font-variant: normal; font-weight: normal; text-transform: none; padding-top: 3pt; padding-right: 0pt; padding-left: 0pt; padding-bottom: 3pt; margin-top: -24pt; margin-right: 0pt; margin-left: 0pt; margin-bottom: 0pt">

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          <TD><IMG HEIGHT="1" SRC="spacer.gif" WIDTH="520"></TD>

          <TD STYLE="width: 12px; vertical-align: text-bottom; text-align: center; border-bottom: none"><!-- GUTTER -->&nbsp;</TD>

          <TD COLSPAN="3"><IMG HEIGHT="1" SRC="spacer.gif" WIDTH="72"></TD>

</TR>

<TR STYLE="background-color: white">

          <TD STYLE="padding-left: 10pt; text-indent: -10pt; vertical-align: text-bottom" ROWSPAN=1 COLSPAN=1>Assumed initial selling price per unit</TD>

          <TD STYLE="width: 6px; vertical-align: text-bottom; text-align: center" ROWSPAN=1><!-- GUTTER -->&nbsp;</TD>

          <TD STYLE="width: 6px; vertical-align: text-bottom; text-align: left" ROWSPAN=1><!-- $ -->$</TD>

          <TD STYLE="vertical-align: text-bottom; text-align: right" ROWSPAN=1 COLSPAN=1>83.13</TD>

          <TD STYLE="white-space: nowrap; vertical-align: text-bottom; text-align: left"><!-- PERCENT -->&nbsp;</TD>

</TR>

<TR STYLE="background-color: #CCFFCC">

          <TD STYLE="padding-left: 10pt; text-indent: -10pt; vertical-align: text-bottom" ROWSPAN=1 COLSPAN=1>Management Fee (0.75%) <sup>(1)</sup></TD>

          <TD STYLE="width: 6px; vertical-align: text-bottom; text-align: center" ROWSPAN=1><!-- GUTTER -->&nbsp;</TD>

          <TD STYLE="width: 6px; vertical-align: text-bottom; text-align: left" ROWSPAN=1><!-- $ -->$</TD>

          <TD STYLE="vertical-align: text-bottom; text-align: right" ROWSPAN=1 COLSPAN=1>0.62</TD>

          <TD STYLE="white-space: nowrap; vertical-align: text-bottom; text-align: left"><!-- PERCENT -->&nbsp;</TD>

</TR>

<TR STYLE="background-color: white">

          <TD STYLE="padding-left: 10pt; text-indent: -10pt; vertical-align: text-bottom" ROWSPAN=1 COLSPAN=1>Creation Basket Fee <sup>(2)</sup></TD>

          <TD STYLE="width: 6px; vertical-align: text-bottom; text-align: center" ROWSPAN=1><!-- GUTTER -->&nbsp;</TD>

          <TD STYLE="width: 6px; vertical-align: text-bottom; text-align: left" ROWSPAN=1><!-- $ -->$</TD>

          <TD STYLE="vertical-align: text-bottom; text-align: right" ROWSPAN=1 COLSPAN=1>(0.01</TD>

          <TD STYLE="white-space: nowrap; vertical-align: text-bottom; text-align: left">)<!-- PERCENT -->&nbsp;</TD>

</TR>

<TR STYLE="background-color: #CCFFCC">

          <TD STYLE="padding-left: 10pt; text-indent: -10pt; vertical-align: text-bottom" ROWSPAN=1 COLSPAN=1>Estimated Brokerage Fee (0.09%) <sup>(3)</sup></TD>

          <TD STYLE="width: 6px; vertical-align: text-bottom; text-align: center" ROWSPAN=1><!-- GUTTER -->&nbsp;</TD>

          <TD STYLE="width: 6px; vertical-align: text-bottom; text-align: left" ROWSPAN=1><!-- $ -->$</TD>

          <TD STYLE="vertical-align: text-bottom; text-align: right" ROWSPAN=1 COLSPAN=1>0.07</TD>

          <TD STYLE="white-space: nowrap; vertical-align: text-bottom; text-align: left"><!-- PERCENT -->&nbsp;</TD>

</TR>

<TR STYLE="background-color: white">

          <TD STYLE="padding-left: 10pt; text-indent: -10pt; vertical-align: text-bottom" ROWSPAN=1 COLSPAN=1>Interest Income (0.04%) <sup>(4)</sup></TD>

          <TD STYLE="width: 6px; vertical-align: text-bottom; text-align: center" ROWSPAN=1><!-- GUTTER -->&nbsp;</TD>

          <TD STYLE="width: 6px; vertical-align: text-bottom; text-align: left" ROWSPAN=1><!-- $ -->$</TD>

          <TD STYLE="vertical-align: text-bottom; text-align: right" ROWSPAN=1 COLSPAN=1>(0.03</TD>

          <TD STYLE="white-space: nowrap; vertical-align: text-bottom; text-align: left">)<!-- PERCENT -->&nbsp;</TD>

</TR>

<TR STYLE="background-color: #CCFFCC">

          <TD STYLE="padding-left: 10pt; text-indent: -10pt; vertical-align: text-bottom" ROWSPAN=1 COLSPAN=1>Independent Directors and Officers&#146; Fees <sup>(5)</sup></TD>

          <TD STYLE="width: 6px; vertical-align: text-bottom; text-align: center" ROWSPAN=1><!-- GUTTER -->&nbsp;</TD>

          <TD STYLE="width: 6px; vertical-align: text-bottom; text-align: left" ROWSPAN=1><!-- $ -->$</TD>

          <TD STYLE="vertical-align: text-bottom; text-align: right" ROWSPAN=1 COLSPAN=1>0.01</TD>

          <TD STYLE="white-space: nowrap; vertical-align: text-bottom; text-align: left"><!-- PERCENT -->&nbsp;</TD>

</TR>

<TR STYLE="background-color: white">

          <TD STYLE="padding-left: 10pt; text-indent: -10pt; vertical-align: text-bottom" ROWSPAN=1 COLSPAN=1>Fees and expenses associated with tax accounting and reporting <sup>(6)</sup></TD>

          <TD STYLE="width: 6px; vertical-align: text-bottom; text-align: center" ROWSPAN=1><!-- GUTTER -->&nbsp;</TD>

          <TD STYLE="width: 6px; vertical-align: text-bottom; text-align: left" ROWSPAN=1><!-- $ -->$</TD>

          <TD STYLE="vertical-align: text-bottom; text-align: right" ROWSPAN=1 COLSPAN=1>0.27</TD>

          <TD STYLE="white-space: nowrap; vertical-align: text-bottom; text-align: left"><!-- PERCENT -->&nbsp;</TD>

</TR>

<TR STYLE="background-color: #CCFFCC">

          <TD STYLE="padding-left: 10pt; text-indent: -10pt; vertical-align: text-bottom" ROWSPAN=1 COLSPAN=1>Amount of trading income (loss) required for the redemption value at the end of one year to equal the initial selling price of the unit</TD>

          <TD STYLE="width: 6px; vertical-align: text-bottom; text-align: center" ROWSPAN=1><!-- GUTTER -->&nbsp;</TD>

          <TD STYLE="width: 6px; vertical-align: text-bottom; text-align: left" ROWSPAN=1><!-- $ -->$</TD>

          <TD STYLE="vertical-align: text-bottom; text-align: right" ROWSPAN=1 COLSPAN=1>0.93</TD>

          <TD STYLE="white-space: nowrap; vertical-align: text-bottom; text-align: left"><!-- PERCENT -->&nbsp;</TD>

</TR>

<TR STYLE="background-color: white">

          <TD STYLE="padding-left: 10pt; text-indent: -10pt; vertical-align: text-bottom" ROWSPAN=1 COLSPAN=1>Percentage of initial selling price per unit</TD>

          <TD STYLE="width: 6px; vertical-align: text-bottom; text-align: center" ROWSPAN=1><!-- GUTTER -->&nbsp;</TD>

          <TD STYLE="width: 6px; vertical-align: text-bottom; text-align: left" ROWSPAN=1><!-- $ -->&nbsp;</TD>

          <TD STYLE="vertical-align: text-bottom; text-align: right" ROWSPAN=1 COLSPAN=1>1.1</TD>

          <TD STYLE="white-space: nowrap; vertical-align: text-bottom; text-align: left">%<!-- PERCENT -->&nbsp;</TD>

</TR>

</TABLE></DIV>


<P STYLE="text-align: left; text-indent: 1px"><IMG SRC="line.gif" STYLE="width: 72px; height: 1pt"></P>

<TABLE CELLSPACING="0" CELLPADDING="0" WIDTH="100%" STYLE="text-indent:0px; text-align: left; font-family: serif; font-size: 10pt; line-height: 12pt; font-style: normal; font-variant: normal; font-weight: normal; text-transform: none; padding-top: 3pt; padding-right: 0pt; padding-left: 0pt; padding-bottom: 3pt; margin-top: 0pt; margin-right: 0pt; margin-left: 0pt; margin-bottom: 0pt">

<TR STYLE="font-weight: normal; font-style: normal; line-height: 12pt; font-size: 10pt; vertical-align: top; text-align: left">

          <TD STYLE="width: 1px"></TD>

          <TD STYLE="width: 20px; text-align: left">(1)</TD>

          <TD STYLE="text-align: left">USBO is contractually obligated to pay the General Partner a management fee based on daily net assets and paid monthly of 0.75% per annum on average net assets. </TD>

</TR>

</TABLE>

<TABLE CELLSPACING="0" CELLPADDING="0" WIDTH="100%" STYLE="text-indent:0px; text-align: left; font-family: serif; font-size: 10pt; line-height: 12pt; font-style: normal; font-variant: normal; font-weight: normal; text-transform: none; padding-top: 3pt; padding-right: 0pt; padding-left: 0pt; padding-bottom: 3pt; margin-top: 0pt; margin-right: 0pt; margin-left: 0pt; margin-bottom: 0pt">

<TR STYLE="font-weight: normal; font-style: normal; line-height: 12pt; font-size: 10pt; vertical-align: top; text-align: left">

          <TD STYLE="width: 1px"></TD>

          <TD STYLE="width: 20px; text-align: left">(2)</TD>

          <TD STYLE="text-align: left">Authorized Purchasers are required to pay a Creation or Redemption Basket fee of $1,000 for each order they place to create or redeem one or more baskets. An order must be at least one basket, which is 100,000 units. This breakeven analysis assumes a hypothetical investment in a single unit so the Creation Basket fee is $.01 (1,000/100,000). </TD>

</TR>

</TABLE>

<TABLE CELLSPACING="0" CELLPADDING="0" WIDTH="100%" STYLE="text-indent:0px; text-align: left; font-family: serif; font-size: 10pt; line-height: 12pt; font-style: normal; font-variant: normal; font-weight: normal; text-transform: none; padding-top: 3pt; padding-right: 0pt; padding-left: 0pt; padding-bottom: 3pt; margin-top: 0pt; margin-right: 0pt; margin-left: 0pt; margin-bottom: 0pt">

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          <TD STYLE="width: 1px"></TD>

          <TD STYLE="width: 20px; text-align: left">(3)</TD>

          <TD STYLE="text-align: left">This amount is based on the actual brokerage fees for USBO calculated on an annualized basis. </TD>

</TR>

</TABLE>

<TABLE CELLSPACING="0" CELLPADDING="0" WIDTH="100%" STYLE="text-indent:0px; text-align: left; font-family: serif; font-size: 10pt; line-height: 12pt; font-style: normal; font-variant: normal; font-weight: normal; text-transform: none; padding-top: 3pt; padding-right: 0pt; padding-left: 0pt; padding-bottom: 3pt; margin-top: 0pt; margin-right: 0pt; margin-left: 0pt; margin-bottom: 0pt">

<TR STYLE="font-weight: normal; font-style: normal; line-height: 12pt; font-size: 10pt; vertical-align: top; text-align: left">

          <TD STYLE="width: 1px"></TD>

          <TD STYLE="width: 20px; text-align: left">(4)</TD>

          <TD STYLE="text-align: left">USBO earns interest on funds it deposits with the futures commission merchant and the custodian and it estimates that the interest rate will be 0.04% based on the current interest rate on three-month Treasury Bills as of April 28, 2011. The actual rate may vary. </TD>

</TR>

</TABLE>

<TABLE CELLSPACING="0" CELLPADDING="0" WIDTH="100%" STYLE="text-indent:0px; text-align: left; font-family: serif; font-size: 10pt; line-height: 12pt; font-style: normal; font-variant: normal; font-weight: normal; text-transform: none; padding-top: 3pt; padding-right: 0pt; padding-left: 0pt; padding-bottom: 3pt; margin-top: 0pt; margin-right: 0pt; margin-left: 0pt; margin-bottom: 0pt">

<TR STYLE="font-weight: normal; font-style: normal; line-height: 12pt; font-size: 10pt; vertical-align: top; text-align: left">

          <TD STYLE="width: 1px"></TD>

          <TD STYLE="width: 20px; text-align: left">(5)</TD>

          <TD STYLE="text-align: left">The foregoing assumes that the assets of USBO are aggregated with those of USOF, USNG, US12OF, UGA, USHO, USSO and US12NG, that the aggregate fees paid to the independent directors was $1,107,140, that the allocable portion of the fees borne by USBO equals $421, and that USBO has $49,880,851.08 in assets which is the amount of assets as of April 28, 2011. </TD>

</TR>

</TABLE>

<TABLE CELLSPACING="0" CELLPADDING="0" WIDTH="100%" STYLE="text-indent:0px; text-align: left; font-family: serif; font-size: 10pt; line-height: 12pt; font-style: normal; font-variant: normal; font-weight: normal; text-transform: none; padding-top: 3pt; padding-right: 0pt; padding-left: 0pt; padding-bottom: 3pt; margin-top: 0pt; margin-right: 0pt; margin-left: 0pt; margin-bottom: 0pt">

<TR STYLE="font-weight: normal; font-style: normal; line-height: 12pt; font-size: 10pt; vertical-align: top; text-align: left">

          <TD STYLE="width: 1px"></TD>

          <TD STYLE="width: 20px; text-align: left">(6)</TD>

          <TD STYLE="text-align: left">USBO assumed the aggregate costs attributable to tax accounting and reporting for 2010 was $160,000. The number in the break-even table assumes USBO has $49,880,851.08 in assets which is the amount of assets as of April 28, 2011. </TD>

</TR>

</TABLE>

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