-----BEGIN PRIVACY-ENHANCED MESSAGE-----
Proc-Type: 2001,MIC-CLEAR
Originator-Name: webmaster@www.sec.gov
Originator-Key-Asymmetric:
 MFgwCgYEVQgBAQICAf8DSgAwRwJAW2sNKK9AVtBzYZmr6aGjlWyK3XmZv3dTINen
 TWSM7vrzLADbmYQaionwg5sDW3P6oaM5D3tdezXMm7z1T+B+twIDAQAB
MIC-Info: RSA-MD5,RSA,
 Cy4ZD2d6iko/RBGjI50p8+dYm/ao7MyuZvfc8BSEUL/oyZXta/cxqpZvKKT6EYRg
 O+dTp8NRi7vXSLUj3xAd6Q==

<SEC-DOCUMENT>0000905148-04-003600.txt : 20040820
<SEC-HEADER>0000905148-04-003600.hdr.sgml : 20040820
<ACCEPTANCE-DATETIME>20040820121842
ACCESSION NUMBER:		0000905148-04-003600
CONFORMED SUBMISSION TYPE:	497
PUBLIC DOCUMENT COUNT:		1
FILED AS OF DATE:		20040820
EFFECTIVENESS DATE:		20040820

FILER:

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			MUNIYIELD INSURED FUND INC
		CENTRAL INDEX KEY:			0000883412
		IRS NUMBER:				223165131
		STATE OF INCORPORATION:			NJ
		FISCAL YEAR END:			1031

	FILING VALUES:
		FORM TYPE:		497
		SEC ACT:		1933 Act
		SEC FILE NUMBER:	333-113433
		FILM NUMBER:		04988140

	BUSINESS ADDRESS:	
		STREET 1:		800 SCUDDERS MILL ROAD
		CITY:			PLAINSBORO
		STATE:			NJ
		ZIP:			08530
		BUSINESS PHONE:		6092822800
</SEC-HEADER>
<DOCUMENT>
<TYPE>497
<SEQUENCE>1
<FILENAME>efc4-1521_form497.txt
<TEXT>
                         MUNIYIELD INSURED FUND, INC.
                    Auction Market Preferred Stock ("AMPS")

                Supplement to Prospectus dated August 19, 2004


     The Initial Dividend Period for Series I AMPS ends September 6, 2004.


Code #

</TEXT>
</DOCUMENT>
</SEC-DOCUMENT>
-----END PRIVACY-ENHANCED MESSAGE-----
