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Proc-Type: 2001,MIC-CLEAR
Originator-Name: webmaster@www.sec.gov
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<SEC-DOCUMENT>0000919574-11-000400.txt : 20110128
<SEC-HEADER>0000919574-11-000400.hdr.sgml : 20110128
<ACCEPTANCE-DATETIME>20110128161932
ACCESSION NUMBER:		0000919574-11-000400
CONFORMED SUBMISSION TYPE:	4
PUBLIC DOCUMENT COUNT:		1
CONFORMED PERIOD OF REPORT:	20101217
FILED AS OF DATE:		20110128
DATE AS OF CHANGE:		20110128

ISSUER:		

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			BLACKROCK CREDIT ALLOCATION INCOME TRUST IV
		CENTRAL INDEX KEY:			0001379384
		IRS NUMBER:				000000000
		STATE OF INCORPORATION:			DE
		FISCAL YEAR END:			1031

	BUSINESS ADDRESS:	
		STREET 1:		100 BELLEVUE PARKWAY
		STREET 2:		MUTUAL FUND DEPARTMENT
		CITY:			WILMINGTON
		STATE:			DE
		ZIP:			19809
		BUSINESS PHONE:		888-825-2257

	MAIL ADDRESS:	
		STREET 1:		100 BELLEVUE PARKWAY
		STREET 2:		MUTUAL FUND DEPARTMENT
		CITY:			WILMINGTON
		STATE:			DE
		ZIP:			19809

	FORMER COMPANY:	
		FORMER CONFORMED NAME:	BLACKROCK PREFERRED & EQUITY ADVANTAGE TRUST
		DATE OF NAME CHANGE:	20070629

	FORMER COMPANY:	
		FORMER CONFORMED NAME:	BlackRock Preferred & Equity Advantage Trust
		DATE OF NAME CHANGE:	20061115

	FORMER COMPANY:	
		FORMER CONFORMED NAME:	BlackRock Preferred & Equity Trust
		DATE OF NAME CHANGE:	20061027

REPORTING-OWNER:	

	OWNER DATA:	
		COMPANY CONFORMED NAME:			Brigade Leveraged Capital Structures Fund Ltd.
		CENTRAL INDEX KEY:			0001421307
		STATE OF INCORPORATION:			E9
		FISCAL YEAR END:			1231

	FILING VALUES:
		FORM TYPE:		4
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	811-21972
		FILM NUMBER:		11556102

	BUSINESS ADDRESS:	
		STREET 1:		C/O OGIER FIDUCIARY SERVICES (CAY) LTD.
		STREET 2:		89 NEXUS WAY, CAMANA BAY
		CITY:			GRAND CAYMAN
		STATE:			E9
		ZIP:			KY1-9007
		BUSINESS PHONE:		(345) 949-9876

	MAIL ADDRESS:	
		STREET 1:		C/O OGIER FIDUCIARY SERVICES (CAY) LTD.
		STREET 2:		89 NEXUS WAY, CAMANA BAY
		CITY:			GRAND CAYMAN
		STATE:			E9
		ZIP:			KY1-9007

	FORMER NAME:	
		FORMER CONFORMED NAME:	Brigade Leveraged Capital Structures Offshore Ltd.
		DATE OF NAME CHANGE:	20091215

	FORMER NAME:	
		FORMER CONFORMED NAME:	BRIGADE LEVERAGED CAPITAL STRUCTURES FUND LTD.
		DATE OF NAME CHANGE:	20071214
</SEC-HEADER>
<DOCUMENT>
<TYPE>4
<SEQUENCE>1
<FILENAME>p1161704.xml
<DESCRIPTION>BRIGADE LCS OFFSHORE LTD
<TEXT>
<XML>
<?xml version="1.0"?>
<ownershipDocument>

    <schemaVersion>X0303</schemaVersion>

    <documentType>4</documentType>

    <periodOfReport>2010-12-17</periodOfReport>

    <notSubjectToSection16>0</notSubjectToSection16>

    <issuer>
        <issuerCik>0001379384</issuerCik>
        <issuerName>BLACKROCK CREDIT ALLOCATION INCOME TRUST IV</issuerName>
        <issuerTradingSymbol>BTZ</issuerTradingSymbol>
    </issuer>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001421307</rptOwnerCik>
            <rptOwnerName>Brigade Leveraged Capital Structures Fund Ltd.</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>C/O OGIER FIDUCIARY SVCS (CAYMAN) LTD</rptOwnerStreet1>
            <rptOwnerStreet2>89 NEXUS WAY, CAMANA BAY</rptOwnerStreet2>
            <rptOwnerCity>GRAND CAYMAN</rptOwnerCity>
            <rptOwnerState>E9</rptOwnerState>
            <rptOwnerZipCode>KY1-9007</rptOwnerZipCode>
            <rptOwnerStateDescription>CAYMAN ISLANDS</rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isDirector>0</isDirector>
            <isOfficer>0</isOfficer>
            <isTenPercentOwner>1</isTenPercentOwner>
            <isOther>0</isOther>
            <officerTitle></officerTitle>
            <otherText></otherText>
        </reportingOwnerRelationship>
    </reportingOwner>

    <nonDerivativeTable>
        <nonDerivativeTransaction>
            <securityTitle>
                <value>Preferred Shares</value>
            </securityTitle>
            <transactionDate>
                <value>2009-12-17</value>
            </transactionDate>
            <deemedExecutionDate></deemedExecutionDate>
            <transactionCoding>
                <transactionFormType>4</transactionFormType>
                <transactionCode>P</transactionCode>
                <equitySwapInvolved>0</equitySwapInvolved>
            </transactionCoding>
            <transactionTimeliness></transactionTimeliness>
            <transactionAmounts>
                <transactionShares>
                    <value>1186</value>
                </transactionShares>
                <transactionPricePerShare>
                    <value>86</value>
                </transactionPricePerShare>
                <transactionAcquiredDisposedCode>
                    <value>A</value>
                </transactionAcquiredDisposedCode>
            </transactionAmounts>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>2429</value>
                    <footnoteId id="F1"/>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>D</value>
                </directOrIndirectOwnership>
            </ownershipNature>
        </nonDerivativeTransaction>
        <nonDerivativeTransaction>
            <securityTitle>
                <value>Preferred Shares</value>
            </securityTitle>
            <transactionDate>
                <value>2011-01-05</value>
            </transactionDate>
            <deemedExecutionDate></deemedExecutionDate>
            <transactionCoding>
                <transactionFormType>4</transactionFormType>
                <transactionCode>S</transactionCode>
                <equitySwapInvolved>0</equitySwapInvolved>
            </transactionCoding>
            <transactionTimeliness></transactionTimeliness>
            <transactionAmounts>
                <transactionShares>
                    <value>1243</value>
                    <footnoteId id="F2"/>
                </transactionShares>
                <transactionPricePerShare>
                    <value>100</value>
                </transactionPricePerShare>
                <transactionAcquiredDisposedCode>
                    <value>D</value>
                </transactionAcquiredDisposedCode>
            </transactionAmounts>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>1186</value>
                    <footnoteId id="F1"/>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>D</value>
                </directOrIndirectOwnership>
            </ownershipNature>
        </nonDerivativeTransaction>
    </nonDerivativeTable>

    <footnotes>
        <footnote id="F1">Consistent with the Securities and Exchange Commission's Auction Rate Securities Global Exemptive Relief no action letter issued on September 22, 2008, the shares reported herein represent the reporting person's combined holdings in the separate series of preferred shares of the issuer.</footnote>
        <footnote id="F2">These preferred shares were mandatorily redeemed by the Issuer on January 5, 2011.</footnote>
    </footnotes>

    <ownerSignature>
        <signatureName>Brigade Leveraged Capital Structures Fund Ltd., By: Donald E. Morgan, III, Director</signatureName>
        <signatureDate>2011-01-28</signatureDate>
    </ownerSignature>
</ownershipDocument>
</XML>
</TEXT>
</DOCUMENT>
</SEC-DOCUMENT>
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