EX-99.77B ACCT LTTR

Report of Independent Auditors

To the Shareholders and Board of Directors of

MuniYield Insured Fund, Inc.:

In planning and performing our audit of the financial statements of MuniYield Insured Fund, Inc. for the year ended October 31, 2002, we considered its internal control, including control activities for safeguarding securities, in order to determine our auditing procedures for the purpose of expressing our opinion on the financial statements and to comply with the requirements of Form N-SAR, not to provide assurance on internal control.

The management of MuniYield Insured Fund, Inc. is responsible for establishing and maintaining internal control. In fulfilling this responsibility, estimates and judgments by management are required to assess the expected benefits and related costs of controls.  Generally, internal controls that are relevant to an audit pertain to the entity’s objective of preparing financial statements for external purposes that are fairly presented in conformity with accounting principles generally accepted in the United States. Those controls include the safeguarding of assets against unauthorized acquisition, use, or disposition.

Because of inherent limitations in internal control, error or fraud may occur and not be detected.  Also, projection of any evaluation of internal control to future periods is subject to the risk that it may become inadequate because of changes in conditions or that the effectiveness of the design and operation may deteriorate.

Our consideration of internal control would not necessarily disclose all matters in internal control that might be material weaknesses under standards established by the American Institute of Certified Public Accountants.  A material weakness is a condition in which the design or operation of one or more of the internal control components does not reduce to a relatively low level the risk that misstatements caused by error or fraud in amounts that would be material in relation to the financial statements being audited may occur and not be detected within a timely period by employees in the normal course of performing their assigned functions.  However, we noted no matters involving internal control and its operation, including controls for safeguarding securities that we consider to be material weaknesses as defined above as of October 31, 2002.< /P>

This report is intended solely for the information and use of the Board of Directors and management of MuniYield Insured Fund, Inc., and the Securities and Exchange Commission and is not intended to be and should not be used by anyone other than these specified parties.

Ernst & Young LLP

MetroPark, New Jersey

December 9, 2002

EX-99.77O RULE 10F-3

MUNIYIELD INSURED FUND, INC.

FILE # 811-6540

ATTACHMENT 77O

TRADE DATE	DESCRIPTION OF SECURITY	ISSUE SIZE	AMOUNT PURCHASED	MEMBER OF UNDERWRITING SYNDICATE FROM WHOM FUND PURCHASED
05/03/2002	NYS Environmental Wtr  5.0%  6/15/21	518,940,000	7,000,000	Bear Stearns
05/09/2002	MTA NY  5.0%  11/15/30	2,894,185,000	18,000,000	Bear Stearns
05/09/2002	MTA NY  5.125%  11/15/31	2,894,185,000	5,000,000	Bear Stearns
05/09/2002	MTA NY 5.5%  11/15/18	2,894,185,000	12,900,000	Bear Stearns
05/17/2002	Miami-Dade Aviation FL 5.375%  10/01/25	299,000,000	10,750,000	Salomon
05/23/2002	Met Wash Airport  5.125%  10/1/26	250,000,000	4,000,000	Lehman Bros
05/23/2002	NYC GO  5.875%  6/1/20	1,507,590,000	7,000,000	Salomon
06/05/2002	MTA NY  5.5%  7/1/20	1,715,755,000	6,000,000	Lehman Bros
06/05/2002	MTA NY  5.125%  1/1/29	1,715,755,000	10,000,000	Lehman Bros
06/17/2002	Tennessee Hsg Dev Agy  5.35%  1/1/26	85,000,000	3,155,000	PaineWebber
06/17/2002	Tennessee Hsg Dev Agy  5.25%  7/1/22	85,000,000	3,450,000	PaineWebber
06/26/2002	MTA St Svc  5.5%  7/1/19	649,450,000	7,025,000	PaineWebber
06/26/2002	MTA St Svc  5.5%  7/1/23	649,450,000	8,640,000	PaineWebber
06/26/2002	MTA St Svc  5.0%  7/1/24	649,450,000	6,600,000	PaineWebber
06/26/2002	MTA St Svc  5.0%  1/1/31	649,450,000	7,500,000	PaineWebber
07/11/2002	AZ School Fac St. IMPT  5.25%  7/1/18	278,635,000	4,590,000	Salomon
07/12/2002	NYC Hlth & Hosp  5.5%  2/15/19	192,750,000	1,625,000	PaineWebber
07/18/2002	NYC GO  5.75%  8/1/16	1,005,827,580.75	8,100,000	Morgan Stanley
08/07/2002	Metropolitan Trans Auth NY 5% 11/15/30	1,246,870,000	12,000,000	Morgan Stanley
08/08/2002	State of Illinois General Obl. 5.5% 08/01/19	564,900,000	1,250,000	Morgan Stanley
08/15/2002	Tobacco Settlement Fin Corp 5.75 % 06/01/32	1,801,455,000	7,000,000	Salomon
08/22/2002	San Diego 5.25% 07/01/24	274,995,345	1,280,000	Banc of America
08/22/2002	San Diego 5.25% 07/01/22	274,995,345	3,945,000	Banc of America
09/06/2002	Dallas Ft Worth 5% 11/01/25	375,000,000	6,230,000	Bear Stearns
09/06/2002	Dallas Ft Worth 5% 11/01/27	375,000,000	3,800,000	Bear Stearns
09/12/2002	NY Dorm Auth 5.25% 11/15/26	1,074,885,000	12,000,000	Lehman Bros
09/09/2002	Triborough Brdg 5% 11/15/32	2,157,065,000	7,420,000	Salomon
09/09/2002	Triborough Brdg 5% 11/15/32	2,157,065,000	4,000,000	Salomon
09/19/2002	Triborough Brdg 5% 11/15/32	2,157,065,000	7,300,000	Salomon
09/19/2002	Triborough Brdg 5% 11/15/32	2,157,065,000	250,000	Salomon
09/19/2002	Triborough Brdg 5% 11/15/32	2,157,065,000	500,000	ABN AMRO
09/09/2002	Triborough Brdg 5% 11/15/32	2,157,065,000	250,000	PaineWebber
09/19/2002	Triborough Brdg 5% 11/15/32	2,157,065,000	200,000	Bear Stearns
09/19/2002	Triborough Brdg 5% 11/15/32	2,157,065,000	95,000	First Albany
10/10/2002	State of Cal 2002-2003 Rns and Index Notes 6/20/03	9,000,000,000	15,000,000	Goldman Sachs
10/10/2002	Puerto Rico Public Bld Auth 5.25% 07/01/23	466,162,418	5,430,000	Lehman Bros
10/10/2002	Puerto Rico Public Bld Auth 5.25% 07/01/25	466,162,418	6,535,000	Lehman Bros
10/24/2002	Triborough Bridge and Tunnel 5% 11/15/32	756,095,000	11,000,000	Chase/JP Morgan
10/25/2002	Tobacco Settlement Auth 6.625% 06/01/32	517,905,000	2,000,000	Bear Stearns
10/30/2002	New York City Trans Fin Auth 5.25% 08/01/21	441,735,000	4,000,000	JP Morgan/Chase

EX-99.77Q3 CERT

Item 77Q3(a)(i)

The registrant’s certifying officers have reasonably designed such disclosure controls and procedures to ensure material information relating to the registrant is made known to us by others particularly during the period in which this report is being prepared.  The registrant’s certifying officers have determined that the registrant’s disclosure controls and procedures are effective based on our evaluation of these controls and procedures as of a date within 90 days prior to the filing date of this report.

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Item 77Q3(a)(ii)

There were no significant changes in the registrant’s internal controls or in other factors that could significantly affect these controls subsequent to the date of their evaluation, including any corrective actions with regard to significant deficiencies and material weaknesses.

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EX-99.77Q3 CERT

CERTIFICATION PURSUANT TO SECTION 302

OF THE SARBANES-OXLEY ACT OF 2002

I, Donald C. Burke, Chief Financial Officer of MuniYield Insured Fund, Inc., certify that:

1.

I have reviewed this report on Form N-SAR of MuniYield Insured Fund, Inc.;

2.

Based on my knowledge, this report does not contain any untrue statement of a material fact or omit to state a material fact necessary to make the statements made, in light of the circumstances under which such statements were made, not misleading with respect to the period covered by this report;

3.

Based on my knowledge, the financial information included in this report, and the financial statements on which the financial information is based, fairly present in all material respects the financial condition, results of operations, changes in net assets, and cash flows (if the financial statements are required to include a statement of cash flows) of the registrant as of, and for, the periods presented in this report;

4.

The registrant’s other certifying officers and I are responsible for establishing and maintaining disclosure controls and procedures (as defined in rule 30a-2(c) under the Investment Company Act) for the registrant and have:

a)

designed such disclosure controls and procedures to ensure that material information related to the registrant, including its consolidated subsidiaries, is made known to us by others within those entities, particularly during the period in which this report is being prepared;

b)

evaluated the effectiveness of the registrant’s disclosure controls and procedures as of a date within 90 days prior to the filing date of this report (the “Evaluation Date”); and

c)

presented in this report our conclusions about the effectiveness of the disclosure controls and procedures based on our evaluation as of the Evaluation Date;

1.

The registrant’s other certifying officers and I have disclosed, based on our most recent evaluation, to the registrant’s auditors and the audit committee of the registrant’s board of directors (or persons performing the equivalent functions):

a)

all significant deficiencies in the design or operation of internal controls which could adversely affect the registrant’s ability to record, process, summarize, and report financial data and have identified for the registrant’s auditors any material weaknesses in internal controls; and

b)

any fraud, whether or not material, that involves management or other employees who have a significant role in the registrant’s internal controls; and

1.

The registrant’s other certifying officers and I have indicated in this report whether or not there were significant changes in internal controls or in other factors that could significantly affect internal controls subsequent to the date of our most recent evaluation, including any corrective actions with regard to significant deficiencies and material weaknesses.

Date: December 23, 2002

_/s/ Donald C. Burke________

(Donald C. Burke

Chief Financial Officer of

MuniYield Insured Fund, Inc.)

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EX-99.77Q3 CERT

CERTIFICATION PURSUANT TO SECTION 302

OF THE SARBANES-OXLEY ACT OF 2002

I, Terry K. Glenn, President of MuniYield Insured Fund, Inc., certify that:

1.

I have reviewed this report on Form N-SAR of MuniYield Insured Fund, Inc.;

2.

Based on my knowledge, this report does not contain any untrue statement of a material fact or omit to state a material fact necessary to make the statements made, in light of the circumstances under which such statements were made, not misleading with respect to the period covered by this report;

3.

Based on my knowledge, the financial information included in this report, and the financial statements on which the financial information is based, fairly present in all material respects the financial condition, results of operations, changes in net assets, and cash flows (if the financial statements are required to include a statement of cash flows) of the registrant as of, and for, the periods presented in this report;

4.

The registrant’s other certifying officers and I are responsible for establishing and maintaining disclosure controls and procedures (as defined in rule 30a-2(c) under the Investment Company Act) for the registrant and have:

a)

designed such disclosure controls and procedures to ensure that material information related to the registrant, including its consolidated subsidiaries, is made known to us by others within those entities, particularly during the period in which this report is being prepared;

b)

evaluated the effectiveness of the registrant’s disclosure controls and procedures as of a date within 90 days prior to the filing date of this report (the “Evaluation Date”); and

c)

presented in this report our conclusions about the effectiveness of the disclosure controls and procedures based on our evaluation as of the Evaluation Date;

5.  The registrant’s other certifying officers and I have disclosed, based on our most recent evaluation, to the registrant’s auditors and the audit committee of the registrant’s board of directors (or persons performing the equivalent functions):

a)

all significant deficiencies in the design or operation of internal controls which could adversely affect the registrant’s ability to record, process, summarize, and report financial data and have identified for the registrant’s auditors any material weaknesses in internal controls; and

b)

any fraud, whether or not material, that involves management or other employees who have a significant role in the registrant’s internal controls; and

6.  The registrant’s other certifying officers and I have indicated in this report whether or not there were significant changes in internal controls or in other factors that could significantly affect internal controls subsequent to the date of our most recent evaluation, including any corrective actions with regard to significant deficiencies and material weaknesses.

Date: December 23, 2002

_/s/ Terry K. Glenn________

(Terry K. Glenn

President of

MuniYield Insured Fund, Inc.)

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