<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>
