Managed Duration Investment Grade Municipal Fund (MZF) Form 3 MANAGED DURATION INVESTMENT GRADE MUNICIPAL FUND / GEORGE W KARPUS ownership change

SEC Form 3

FORM 3

UNITED STATES SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

INITIAL STATEMENT OF BENEFICIAL OWNERSHIP OF SECURITIES

Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934
or Section 30(h) of the Investment Company Act of 1940

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1. Name and Address of Reporting Person^*

Karpus Management, Inc.

(Last) (First) (Middle)

183 SULLY'S TRAIL

(Street)

PITTSFORD NY 14534

(City) (State) (Zip)

2. Date of Event Requiring Statement (Month/Day/Year)
03/08/2018

3. Issuer Name and Ticker or Trading Symbol
MANAGED DURATION INVESTMENT GRADE MUNICIPAL FUND [ MZF ]

4. Relationship of Reporting Person(s) to Issuer
(Check all applicable)

Director	X	10% Owner
Officer (give title below)		Other (specify below)

5. If Amendment, Date of Original Filed (Month/Day/Year)

6. Individual or Joint/Group Filing (Check Applicable Line)

	Form filed by One Reporting Person
X	Form filed by More than One Reporting Person

Table I - Non-Derivative Securities Beneficially Owned
1. Title of Security (Instr. 4)	2. Amount of Securities Beneficially Owned (Instr. 4)	3. Ownership Form: Direct (D) or Indirect (I) (Instr. 5)	4. Nature of Indirect Beneficial Ownership (Instr. 5)
Common Stock(1)	1,696,711	D(2)
Common Stock(1)	48,647	D(3)

Table II - Derivative Securities Beneficially Owned (e.g., puts, calls, warrants, options, convertible securities)
1. Title of Derivative Security (Instr. 4)	2. Date Exercisable and Expiration Date (Month/Day/Year)		3. Title and Amount of Securities Underlying Derivative Security (Instr. 4)		4. Conversion or Exercise Price of Derivative Security	5. Ownership Form: Direct (D) or Indirect (I) (Instr. 5)	6. Nature of Indirect Beneficial Ownership (Instr. 5)
	Date Exercisable	Expiration Date	Title	Amount or Number of Shares

1. Name and Address of Reporting Person^*

Karpus Management, Inc.

(Last) (First) (Middle)

183 SULLY'S TRAIL

(Street)

PITTSFORD NY 14534

(City) (State) (Zip)

1. Name and Address of Reporting Person^*

KARPUS GEORGE W

(Last) (First) (Middle)

KARPUS MANAGEMENT, INC.

183 SULLY'S TRAIL

(Street)

PITTSFORD NY 14534

(City) (State) (Zip)

Explanation of Responses:

1. This Form 3 is filed by Karpus Management, Inc., d/b/a Karpus Investment Management ("Karpus") and George W. Karpus (collectively, the "Reporting Persons"). Each Reporting Person may be deemed to be a member of a Section 13(d) group that owns more than 10% of the Issuer's outstanding shares of common stock. Both Karpus and Mr. Karpus disclaim any beneficial ownership (as that term is defined in SEC Rule 16a-1(2)) of share of the Issuer except to the extent of its or his pecuniary interest, if any, therein. This filing shall not be an admission by either of the Reporting Persons and the filers disclaim any such obligation.

2. Shares of Common Stock beneficially owned by Karpus.

3. Mr. Karpus beneficially owns 34,893 Shares. In addition, Mr. Karpus may be deemed to beneficially own 13,754 Shares held by Karpus.

	Karpus Management, Inc. by /s/ Daniel L. Lippincott, CFA, Director of Investment Personnel and Sr. Tax-Sensitive Mgr.	03/12/2018
	George W. Karpus	03/12/2018
	** Signature of Reporting Person	Date
Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.
* If the form is filed by more than one reporting person, see Instruction 5 (b)(v).
** Intentional misstatements or omissions of facts constitute Federal Criminal Violations See 18 U.S.C. 1001 and 15 U.S.C. 78ff(a).
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