N-CSRS

United States

Securities and Exchange Commission

Washington, D.C. 20549

Form N-CSR

Certified Shareholder Report of Registered Management Investment Companies

811-2677

(Investment Company Act File Number)

Federated Municipal Bond Fund, Inc.

______________________________________________________________

(Exact Name of Registrant as Specified in Charter)

Federated Investors Funds

4000 Ericsson Drive

Warrendale, PA 15086-7561

(Address of Principal Executive Offices)

(412) 288-1900

(Registrant's Telephone Number)

Peter J. Germain, Esquire

Federated Investors Tower

1001 Liberty Avenue

Pittsburgh, Pennsylvania 15222-3779

(Name and Address of Agent for Service)

(Notices should be sent to the Agent for Service)

Date of Fiscal Year End: 03/31/18

Date of Reporting Period: Six months ended 09/30/17

Item 1. Reports to Stockholders

Semi-Annual Shareholder Report

September 30, 2017

Share Class | Ticker	A | LMSFX	B | LMSBX	C | LMSCX
	F | LMFFX	Institutional | LMBIX

Federated Municipal Bond Fund, Inc.

(formerly, Federated Municipal Securities Fund, Inc.)

Fund Established 1976

Dear Valued Shareholder,

I am pleased to present the Semi-Annual Shareholder Report for your fund covering the period from April 1, 2017 through September 30, 2017. This report includes a complete listing of your fund's holdings, performance information and financial statements along with other important fund information.

In addition, our website, FederatedInvestors.com, offers easy access to Federated resources that include timely fund updates, economic and market insights from our investment strategists, and financial planning tools. We invite you to register to take full advantage of its capabilities.

Thank you for investing with Federated. I hope you find this information useful and look forward to keeping you informed.

Sincerely,

J. Christopher Donahue, President

Not FDIC Insured ■ May Lose Value ■ No Bank Guarantee

CONTENTS

In Memoriam	1
Portfolio of Investments Summary Table	2
Portfolio of Investments	3
Financial Highlights	15
Statement of Assets and Liabilities	20
Statement of Operations	22
Statement of Changes in Net Assets	23
Notes to Financial Statements	24
Shareholder Expense Example	33
Evaluation and Approval of Advisory Contract–May 2017	35
Voting Proxies on Fund Portfolio Securities	41
Quarterly Portfolio Schedule	41

In Memoriam

With profound sadness, Federated announces the passing of John F. (“Jack”) Donahue and John W. (“John”) McGonigle. They will be greatly missed.

Jack Donahue

(Former Chairman and President, and Emeritus Director/Trustee, of the Federated Funds, and Founder, Former Chairman, President and Chief Executive Officer, and Chairman Emeritus, of Federated Investors, Inc.)

Jack Donahue, along with Richard B. Fisher, founded Federated in 1955 and served as a leader and member of the Boards of Directors/Trustees of the Federated Funds and the Board of Directors of Federated Investors, Inc. Mr. Donahue was a family man of deep faith with exemplary character and fealty, who served his religion, family, community, and the Federated Funds and Federated, as well as their shareholders, officers and employees, with distinction. His integrity, intelligence, and keen sense of fiduciary duty, coupled with his faith, family and background as a West Point graduate and Strategic Air Command B-29 pilot, served as a foundation for his strong business acumen and leadership. Among his many achievements, Mr. Donahue's steadfast and innovative leadership of the Federated Funds and Federated, as well as within the investment management industry, led to the birth of money market funds in the 1970s and their growth as an innovative, efficient and effective cash management vehicle throughout the 1980s, 1990s, 2000s and beyond. Federated expresses deep gratitude to Mr. Donahue for his inspiring leadership, distinguished service and contributions as a husband, father, founder, Board member and officer, colleague and friend.

John McGonigle

(Former Secretary of the Federated Funds, Former Director, Secretary and Chief Legal Officer of Federated Investors, Inc.)

John McGonigle served the Federated Funds and their respective Boards with distinction for more than 50 years as Fund Secretary and also served as Director for several closed-end funds. Mr. McGonigle was a gifted lawyer and wise counselor with a genial presence, keen intellect and convivial demeanor. A man of deep faith, he was a devoted husband, father and grandfather. A graduate of Duquesne University School of Law, Mr. McGonigle served as an officer in the U.S. Army for two years, achieving the rank of Captain. He also served on the staff of the Securities and Exchange Commission before joining Federated in 1966. Among many professional accomplishments, Mr. McGonigle helped fashion the regulatory foundation for money market funds, established Federated's first offshore funds in Ireland, and represented Federated on the Board of Governors of the Investment Company Institute where he was a member of the Executive Committee. Federated expresses deep gratitude for Mr. McGonigle and his impact on his family, friends, the community, and the mutual fund industry.

Semi-Annual Shareholder Report

1

Portfolio of Investments Summary Table (unaudited)

At September 30, 2017, the Fund's sector composition¹ was as follows:

Sector Composition	Percentage of Total Net Assets
Pre-refunded	12.4%
Hospital	12.0%
Toll Road	10.3%
Water & Sewer	9.5%
Education	9.0%
Public Power	7.7%
Dedicated Tax	6.7%
Airport	6.7%
General Obligation—State	5.8%
Senior Care	3.3%
Other2	17.0%
Other Assets and Liabilities—Net3	(0.4)%
TOTAL	100.0%

1	Sector classifications, and the assignment of holdings to such sectors, are based upon the economic sector and/or revenue source of the underlying obligor, as determined by the Fund's Adviser. For securities that have been enhanced by a third party guarantor, such as bond insurers and banks, sector classifications are based upon the economic sector and/or revenue source of the underlying obligor, as determined by the Fund's Adviser. Pre-refunded securities are those whose debt service is paid from escrowed assets, usually U.S. government securities.
2	For purposes of this table, sector classifications constitute 83.4% of the Fund's total net assets. Remaining sectors have been aggregated under the designation “Other.”
3	Assets, other than investments in securities, less liabilities. See Statement of Assets and Liabilities.

Semi-Annual Shareholder Report

2

Portfolio of Investments

September 30, 2017 (unaudited)

Principal Amount			Value
		MUNICIPAL BONDS—98.7%
		Alabama—1.0%
$2,000,000		Birmingham, AL Waterworks Board, Subordinate Revenue Refunding Bonds (Series 2016-B), 4.00%, 1/1/2043	$2,083,220
1,250,000		Selma, AL IDB (International Paper Co.), Gulf Opportunity Zone Bonds (Series 2010A), 5.80%, 5/1/2034	1,373,725
		TOTAL	3,456,945
		Arizona—3.2%
3,000,000		Arizona Board of Regents (Arizona State University), (Series 2016B), 5.00%, 7/1/2047	3,466,350
4,000,000		Arizona Board of Regents (Arizona State University), System Revenue & Refunding Bonds (Series 2015A Green Bonds), 5.00%, 7/1/2041	4,600,480
1,000,000		Arizona Board of Regents (Arizona State University), System Revenue Bonds (Series 2008C), 6.00% (United States Treasury PRF 7/1/2018@100)/(Original Issue Yield: 6.12%), 7/1/2028	1,036,750
1,740,000		Phoenix, AZ IDA (Great Heart Academies), Education Facility Revenue Bonds (Series 2014A), 5.00%, 7/1/2044	1,848,367
		TOTAL	10,951,947
		California—9.7%
3,000,000		Bay Area Toll Authority, CA, San Francisco Bay Area Subordinate Toll Bridge Revenue Bonds (Series 2010 S-2), 5.00% (United States Treasury PRF 10/1/2020@100), 10/1/2042	3,355,380
1,000,000		Bay Area Toll Authority, CA, San Francisco Bay Area Toll Bridge Revenue Bonds (Series 2009F-1), 5.625% (United States Treasury PRF 4/1/2019@100), 4/1/2044	1,070,190
1,500,000	1	Bay Area Toll Authority, CA, San Francisco Bay Area Toll Bridge Revenue Bonds (SIFMA Index Rate Bonds Series 2001A) FRNs, 2.19%(SIFMA 7-day +1.250%), Mandatory Tender 4/1/2027	1,523,520
2,000,000		California Health Facilities Financing Authority (Providence St. Joseph Health), Revenue Bonds (Series 2014B), 5.00%, 10/1/2044	2,228,320
1,000,000		California Health Facilities Financing Authority (Stanford Health Care), Revenue Bonds (Series 2015A), 5.00%, 8/15/2054	1,120,670
3,000,000		California State University (The Trustees of), Systemwide Revenue Bonds (Series 2011A), 5.00%, 11/1/2037	3,402,930
2,000,000		California State, Various Purpose GO Bonds, 6.00%, 11/1/2039	2,199,680
4,000,000		California State, Various Purpose UT GO Bonds, 5.75% (Original Issue Yield: 5.85%), 4/1/2029	4,276,200
1,000,000		California State, Various Purpose UT GO Bonds, 6.50%, 4/1/2033	1,081,320
2,000,000		Los Angeles Department of Water & Power (Los Angeles, CA Department of Water & Power (Water Works/System)), Water System Revenue Bonds (Series 2013B), 5.00%, 7/1/2033	2,336,460

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3

Principal Amount			Value
		MUNICIPAL BONDS—continued
		California—continued
$1,000,000		M-S-R Energy Authority, CA, Gas Revenue Bonds (Series 2009A), 7.00% (Citigroup, Inc. GTD), 11/1/2034	$1,426,290
1,000,000		Metropolitan Water District of Southern California, Water Revenue Refunding Bonds (Series 2009C), 5.00%, 7/1/2031	1,068,430
3,000,000		Roseville, CA Natural Gas Financing Authority, Gas Revenue Bonds, 5.00% (Bank of America Corp. GTD), 2/15/2025	3,413,520
1,500,000		Sacramento County, CA Airport System, Airport System Senior Revenue Bonds (Series 2009B), 5.50% (Assured Guaranty Corp. INS)/(Original Issue Yield: 5.60%), 7/1/2034	1,551,060
349,000	2	San Bernardino County, CA Housing Authority (Glen Aire Park & Pacific Palms), Subordinated Revenue Bonds, 7.25%, 4/15/2042	165,524
2,000,000		San Francisco, CA City & County Airport Commission, Second Series Revenue Bonds (Series 2014B), 5.00%, 5/1/2044	2,278,500
1,000,000		University of California (The Regents of), General Revenue Bonds (Series 2009O), 5.75% (United States Treasury PRF 5/15/2019@100), 5/15/2034	1,077,850
		TOTAL	33,575,844
		Colorado—3.0%
1,445,000		Denver (City & County), CO (Denver, CO City & County Airport Authority), Revenue Bonds (Series 2012B), 5.00%, 11/15/2037	1,638,095
1,000,000		Denver, CO City & County Airport Authority (United Airlines, Inc.), Special Facilities Airport Revenue Refunding Bonds (Series 2017), 5.00%, 10/1/2032	1,088,010
4,250,000		University of Colorado Hospital Authority, Revenue Bonds (Series 2012A), 5.00%, 11/15/2036	4,806,325
2,500,000		University of Colorado, University Enterprise Revenue Bonds (Series 2011A), 5.25% (United States Treasury PRF 6/1/2021@100), 6/1/2036	2,862,625
		TOTAL	10,395,055
		Connecticut—1.6%
3,000,000		Connecticut State HEFA (Trinity Healthcare Credit Group), Revenue Bonds (Series 2016CT), 5.00%, 12/1/2045	3,386,610
2,000,000		Connecticut State Transportation Infrastructure Authority, Special Tax Obligation Revenue Bonds (Series 2013A), 5.00%, 10/1/2026	2,298,860
		TOTAL	5,685,470
		Delaware—0.8%
2,380,000		Delaware EDA (Delmarva Power and Light Co.), Gas Facilities Refunding Bonds, 5.40%, 2/1/2031	2,595,961
		District of Columbia—1.9%
1,800,000		District of Columbia Revenue (Friendship Public Charter School, Inc.), Revenue Bonds (Series 2016A), 5.00%, 6/1/2041	1,948,536
1,000,000		District of Columbia Revenue (Georgetown University), University Refunding Revenue Bonds (Series 2017), 5.00%, 4/1/2036	1,172,470

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4

Principal Amount		Value
	MUNICIPAL BONDS—continued
	District of Columbia—continued
$3,000,000	District of Columbia Water & Sewer Authority, Public Utility Subordinate Lien Revenue Refunding Bonds (Series 2016A), 5.00%, 10/1/2039	$3,462,090
	TOTAL	6,583,096
	Florida—10.3%
2,000,000	Atlantic Beach, FL Health Care Facilities (Fleet Landing Project, FL), Revenue & Refunding Bonds (Series 2013A), 5.00%, 11/15/2037	2,148,100
1,500,000	Broward County, FL Airport System, Airport System Revenue Bonds (Series 2012Q-1), 5.00%, 10/1/2037	1,675,410
1,000,000	Florida State Mid-Bay Authority, First Senior Lien Revenue Bonds (Series 2015A), 5.00%, 10/1/2035	1,124,730
2,000,000	Greater Orlando, FL Aviation Authority, Subordinate Airport Facilities Revenue Bonds (Series 2017A), 5.00%, 10/1/2036	2,318,860
2,000,000	Lee County, FL IDA (Cypress Cove at Healthpark), Healthcare Facilities Revenue Bonds (Series 2014), 5.50%, 10/1/2047	2,087,280
3,500,000	Miami Beach, FL Resort Tax, Revenue Bonds (Series 2015), 5.00%, 9/1/2040	4,008,830
1,000,000	Miami-Dade County, FL (Miami-Dade County, FL Seaport), Seaport Revenue Bonds (Series 2013A), 5.75%, 10/1/2030	1,177,290
1,000,000	Miami-Dade County, FL (Miami-Dade County, FL Seaport), Seaport Revenue Bonds (Series 2013A), 5.75%, 10/1/2032	1,171,670
1,250,000	Miami-Dade County, FL Expressway Authority, Toll System Revenue Bonds (Series 2010), 5.00% (Original Issue Yield: 5.10%), 7/1/2040	1,358,437
1,500,000	Miami-Dade County, FL Expressway Authority, Toll System Revenue Refunding Bonds (Series 2013A), 5.00%, 7/1/2022	1,736,730
2,000,000	Miami-Dade County, FL Expressway Authority, Toll System Revenue Refunding Bonds (Series 2016A), 5.00%, 7/1/2032	2,332,720
1,500,000	Miami-Dade County, FL HFA (Nicklaus Children's Hospital), Hospital Revenue Refunding Bonds (Series 2017), 5.00%, 8/1/2042	1,700,550
2,875,000	Miami-Dade County, FL Transit System, Sales Surtax Revenue Bonds (Series 2012), 5.00%, 7/1/2042	3,257,375
895,000	Orlando & Orange County Expressway Authority, FL, Revenue Bonds (Series 2010A), 5.00%, 7/1/2035	977,197
4,105,000	Orlando & Orange County Expressway Authority, FL, Revenue Bonds (Series 2010A), 5.00% (United States Treasury PRF 7/1/2020@100), 7/1/2035	4,533,562
2,000,000	St. Johns County, FL IDA (Presbyterian Retirement Communities ), Revenue Bonds (Series 2010A), 5.875% (United States Treasury PRF 8/1/2020@100)/(Original Issue Yield: 5.98%), 8/1/2040	2,258,260
1,500,000	Tallahassee, FL Energy System, Revenue Refunding Bonds (Series 2017), 5.00%, 10/1/2036	1,725,915
	TOTAL	35,592,916

Semi-Annual Shareholder Report

5

Principal Amount		Value
	MUNICIPAL BONDS—continued
	Georgia—3.1%
$2,190,000	Atlanta, GA Airport General Revenue, Airport General Revenue Bonds (Series 2010A), 5.00%, 1/1/2035	$2,350,724
4,000,000	Atlanta, GA Water & Wastewater, Revenue Refunding Bonds (Series 2015), 5.00%, 11/1/2040	4,618,480
3,000,000	Georgia State, GO Bonds (Series 2017A-2), 5.00%, 2/1/2033	3,632,250
	TOTAL	10,601,454
	Illinois—5.5%
310,000	Chicago, IL O'Hare International Airport, General Airport Senior Lien Revenue Refunding Bonds (Series 2016B), 5.00%, 1/1/2041	352,839
1,875,000	Chicago, IL O'Hare International Airport, General Airport Third Lien Revenue Bonds (Series 2011C), 6.50% (United States Treasury PRF 1/1/2021@100), 1/1/2041	2,193,281
2,000,000	Chicago, IL O'Hare International Airport, Passenger Facility Charge Revenue Refunding Bonds (Series 2012A), 5.00%, 1/1/2031	2,234,880
1,500,000	Chicago, IL Sales Tax, Revenue Bonds (Series 2011A), 5.25%, 1/1/2038	1,593,720
750,000	Chicago, IL Water Revenue, Second Lien Water Revenue Bonds (Series 2014), 5.00%, 11/1/2044	812,715
3,000,000	Chicago, IL, UT GO Bonds (Series 2015A), 5.50%, 1/1/2033	3,302,790
4,000,000	Illinois State Toll Highway Authority, Toll Highway Senior Revenue Refunding Bonds (Series 2010 A-1), 5.25%, 1/1/2030	4,331,360
3,000,000	Illinois State, GO Refunding Bonds (Series February 2010), 5.00%, 1/1/2024	3,139,140
1,000,000	Illinois State, UT GO Bonds (Series June 2013), 5.25% (Original Issue Yield: 5.28%), 7/1/2028	1,092,090
	TOTAL	19,052,815
	Indiana—3.5%
1,300,000	Indiana Municipal Power Agency, Power Supply System Revenue Bonds (Series 2013A), 5.25%, 1/1/2030	1,504,074
1,625,000	Indiana Municipal Power Agency, Power Supply System Revenue Refunding Bonds (Series 2012A), 5.00%, 1/1/2028	1,830,108
4,565,000	Indiana State Finance Authority Midwestern Relief (Ohio Valley Electric Corp.), Midwestern Disaster Relief Revenue Bonds (Series 2012A), 5.00% (Original Issue Yield: 5.05%), 6/1/2039	4,639,181
4,000,000	Indianapolis, IN Gas Utility Distribution System, Second Lien Revenue Refunding Bonds (Series 2008C), 5.25% (Assured Guaranty Corp. INS), 6/1/2019	4,266,280
	TOTAL	12,239,643
	Kansas—0.5%
1,600,000	Wyandotte County, KS Unified Government Utility System, Improvement & Refunding Revenue Bonds (Series 2014-A), 5.00%, 9/1/2022	1,852,368

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6

Principal Amount			Value
		MUNICIPAL BONDS—continued
		Maryland—1.3%
$3,335,000	1	Maryland State Health & Higher Educational Facilities Authority (Johns Hopkins Hospital), Revenue Bonds (Series 2015B) FRNs, 1.379% (1-month USLIBOR x 0.67% +0.550%), 5/5/2018	$3,345,739
1,000,000		Rockville, MD Mayor & City Council Econ Dev Revenue (King Farm Presbyterian Retirement Community, Inc.), (Series 2017B), 5.00%, 11/1/2042	1,081,240
		TOTAL	4,426,979
		Massachusetts—3.4%
4,330,000		Massachusetts Department of Transportation, Metropolitan Highway System Revenue Bonds (Series 2010B), 5.00%, 1/1/2032	4,674,841
3,000,000		Massachusetts Port Authority, Revenue Bonds (Series 2015A), 5.00%, 7/1/2045	3,434,610
1,000,000		Massachusetts School Building Authority, Senior Dedicated Sales Tax Bonds (Series 2011B), 5.25%, 10/15/2035	1,147,940
2,000,000		Massachusetts Water Resources Authority, General Revenue Refunding Bonds (Series 2017C), 5.00%, 8/1/2032	2,437,560
		TOTAL	11,694,951
		Michigan—3.0%
1,000,000		Michigan Finance Authority Local Government Loan Program (Great Lakes, MI Water Authority), Revenue Refunding Local Project Notes (Series 2015D-1), 5.00%, 7/1/2034	1,127,100
1,000,000		Michigan State Finance Authority Revenue (Great Lakes, MI Sewage Disposal System), Senior Lien Revenue Bonds (Series 2014 C-3), 5.00% (AGM Corp. INS), 7/1/2033	1,129,260
3,000,000		Michigan State University Board of Trustees (Michigan State University), General Revenue Bonds (Series 2015A), 5.00%, 8/15/2040	3,463,590
1,500,000		Michigan Tobacco Settlement Finance Authority, Tobacco Settlement Asset-Backed Bonds (Series 2007A), 6.00%, (Original Issue Yield: 6.25%) 6/1/2048	1,499,820
1,000,000		Royal Oak, MI Hospital Finance Authority (Beaumont Health Credit Group ), Refunding Revenue Bonds (Series 2014D), 5.00%, 9/1/2039	1,103,720
2,000,000		Wayne County, MI Airport Authority, Revenue Bonds (Series 2012A), 5.00%, 12/1/2037	2,202,320
		TOTAL	10,525,810
		Minnesota—0.3%
1,000,000		University of Minnesota (The Regents of), GO Bonds (Series 2011A), 5.25% (United States Treasury PRF 12/1/2020@100), 12/1/2030	1,128,060
		Mississippi—0.3%
940,000		Warren County, MS Gulf Opportunity Zone (International Paper Co.), Gulf Opportunity Zone Bonds (Series 2011A), 5.375%, 12/1/2035	1,033,991

Semi-Annual Shareholder Report

7

Principal Amount			Value
		MUNICIPAL BONDS—continued
		Nebraska—1.4%
$2,000,000		Central Plains Energy Project, NE, Gas Project Revenue Bonds (Project No. 3) (Series 2012), 5.00% (Goldman Sachs Group Inc. GTD)/(Original Issue Yield: 5.05%), 9/1/2042	$2,173,240
2,300,000		Nebraska Public Power District, General Revenue Bonds (Series 2012A), 5.00%, 1/1/2027	2,626,531
		TOTAL	4,799,771
		Nevada—0.1%
305,000	3	Director of the State of Nevada Department of Business and Industry (Doral Academy of Nevada), Charter School Revenue Bonds (Series 2017A), 5.00%, 7/15/2047	312,646
		New Jersey—5.2%
2,880,000		New Jersey EDA (New Jersey State), School Facilities Construction Bonds (Series 2015 WW), 5.25%, 6/15/2040	3,130,618
3,000,000		New Jersey EDA (NJ Dedicated Cigarette Excise Tax), Cigarette Tax Revenue Refunding Bonds (Series 2012), 5.00%, 6/15/2020	3,230,550
1,250,000		New Jersey Health Care Facilities Financing Authority (RWJ Barnabas Health Obligated Group), Revenue Bonds (Series 2014A), 5.00%, 7/1/2043	1,397,737
3,000,000		New Jersey State Transportation Trust Fund Authority (New Jersey State), Transportation System Bonds (Series 2011A), 5.50%, 6/15/2041	3,212,340
1,000,000		New Jersey Turnpike Authority, Turnpike Revenue Bonds (Series 2012A), 5.00%, 1/1/2035	1,118,300
2,000,000		New Jersey Turnpike Authority, Turnpike Revenue Bonds (Series 2015E), 5.00%, 1/1/2034	2,311,160
1,000,000		New Jersey Turnpike Authority, Turnpike Revenue Bonds (Series 2017A), 5.00%, 1/1/2029	1,202,640
2,000,000		Rutgers, The State University of New Jersey, GO Refunding Bonds (Series 2013J), 5.00%, 5/1/2030	2,286,180
		TOTAL	17,889,525
		New Mexico—1.3%
2,000,000		Albuquerque Bernalillo County, NM Water Utility Authority, Joint Water & Sewer System Improvement Revenue Bonds (Series 2009A-1), 5.25% (United States Treasury PRF 7/1/2019@100)/(Original Issue Yield: 5.34%), 7/1/2034	2,146,440
2,175,000		New Mexico State Hospital Equipment Loan Council (Presbyterian Healthcare Services), Hospital System Revenue Bonds (Series 2017A), 5.00%, 8/1/2046	2,480,022
		TOTAL	4,626,462
		New York—7.0%
1,500,000		Brooklyn Arena Local Development Corporation, NY, PILOT Revenue Bonds (Series 2009), 6.375% (United States Treasury PRF 1/15/2020@100)/(Original Issue Yield: 6.476%), 7/15/2043	1,683,075
1,000,000		Hudson Yards Infrastructure Corp. NY, Second Indenture Revenue Bonds (Series 2017A), 5.00%, 2/15/2045	1,158,850

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8

Principal Amount		Value
	MUNICIPAL BONDS—continued
	New York—continued
$4,000,000	Metropolitan Transportation Authority, NY (MTA Transportation Revenue), Revenue Bonds (Series 2015A), 5.00%, 11/15/2045	$4,585,720
4,000,000	New York City, NY TFA , Building Aid Revenue Bonds (Series 2015 S-2), 5.00%, 7/15/2041	4,615,240
3,255,000	New York City, NY, UT GO Bonds (Fiscal 2016 Series C), 5.00%, 8/1/2033	3,826,480
2,470,000	New York Liberty Development Corporation (7 World Trade Center LLC), Revenue Refunding Bonds (Series 2012 Class 2), 5.00%, 9/15/2043	2,750,098
2,000,000	New York State Dormitory Authority (New York State Personal Income Tax Revenue Bond Fund), General Purpose Revenue Bonds (Series 2016A), 5.00%, 2/15/2043	2,309,660
2,780,000	New York State Thruway Authority (New York State Thruway Authority - General Revenue), General Revenue Bonds (Series 2012I), 5.00%, 1/1/2028	3,178,374
	TOTAL	24,107,497
	North Carolina—0.3%
1,000,000	Charlotte, NC Water & Sewer System, Water & Sewer Revenue Bonds (Series 2009), 5.25%, 7/1/2030	1,071,860
	Ohio—2.8%
2,000,000	Buckeye Tobacco Settlement Financing Authority, OH, Tobacco Settlement Asset-Backed Bonds (Series 2007A-2), 5.875% (Original Issue Yield: 6.07%), 6/1/2047	1,913,400
2,000,000	Ohio State Higher Educational Facility Commission (Cleveland Clinic), Revenue Bonds (Series 2012), 5.00%, 1/1/2038	2,250,500
4,000,000	Ohio State Turnpike & Infrastructure Commission, Revenue Refunding Bonds (Series 2010A), 5.00% (United States Treasury PRF 2/15/2020@100), 2/15/2031	4,365,600
1,000,000	Ohio State University, Special Purpose General Receipts Bonds (Series 2013A), 5.00%, 6/1/2038	1,145,640
	TOTAL	9,675,140
	Pennsylvania—8.2%
3,890,000	Allegheny County, PA HDA (UPMC Health System), Hospital Revenue Bonds (Series 2008A), 5.00%, 6/15/2018	4,000,321
2,570,000	Allegheny County, PA Port Authority, Special Revenue Transportation Refunding Bonds (Series 2011), 5.75%, 3/1/2029	2,941,673
1,000,000	Allegheny County, PA Sanitation Authority, Sewer Revenue Bonds (Series 2015), 5.00%, 12/1/2040	1,149,430
450,000	Berks County, PA IDA (Highlands at Wyomissing), Healthcare Facilities Revenue Bonds (Series 2017A), 5.00%, 5/15/2032	502,025
500,000	Berks County, PA IDA (Highlands at Wyomissing), Healthcare Facilities Revenue Bonds (Series 2017A), 5.00%, 5/15/2042	543,775
1,500,000	Delaware River Joint Toll Bridge Commission, Revenue Bonds (Series 2017), 5.00%, 7/1/2042	1,734,180

Semi-Annual Shareholder Report

9

Principal Amount		Value
	MUNICIPAL BONDS—continued
	Pennsylvania—continued
$2,000,000	Delaware River Port Authority, Revenue Bonds (Series 2013), 5.00%, 1/1/2030	$2,324,260
2,000,000	Geisinger Authority, PA Health System (Geisinger Health System), Revenue Refunding Bonds (Series 2017A-1), 5.00%, 2/15/2045	2,275,700
1,000,000	Lancaster County, PA Hospital Authority (Brethren Village), Revenue Bonds (Series 2017), 5.125%, 7/1/2037	1,096,420
1,000,000	Lancaster County, PA Hospital Authority (Brethren Village), Revenue Bonds (Series 2017), 5.25%, 7/1/2041	1,098,390
1,500,000	Montgomery County, PA Higher Education & Health Authority Hospital (Philadelphia Presbytery Homes, Inc.), Revenue Refunding Bonds (Series 2017), 5.00%, 12/1/2037	1,666,230
1,045,000	Montgomery County, PA IDA (ACTS Retirement Life Communities, Inc), Retirement Communities Revenue Refunding Bonds (Series 2012), 5.00%, 11/15/2029	1,138,778
630,000	Pennsylvania EDFA (Pennsylvania Rapid Bridge Replacement), Tax-Exempt Private Activity Revenue Bonds (Series 2015), 5.00%, 12/31/2038	698,676
4,000,000	Pennsylvania State Higher Education Facilities Authority (Temple University), Revenue Bonds (First Series of 2012), 5.00%, 4/1/2042	4,405,680
1,500,000	Pennsylvania State Higher Education Facilities Authority (University of Pennsylvania Health System), Revenue Bonds (Series 2009A), 5.25%(United States Treasury PRF 8/15/2019@100), 8/15/2022	1,616,745
1,000,000	University of Pittsburgh, University Capital Project Bonds (Series 2009B), 5.50% (United States Treasury PRF 3/15/2019@100), 9/15/2024	1,065,320
	TOTAL	28,257,603
	South Carolina—2.4%
2,000,000	Greenville, SC Health System, Hospital Revenue Bonds (Series 2014B), 5.00%, 5/1/2034	2,248,920
615,000	Greenville, SC Health System, Hospital Revenue Bonds (Series 2014B), 5.00%, 5/1/2039	684,526
2,000,000	Lexington County, SC Health Services District, Inc., Revenue Refunding Bonds, 5.00%, 11/1/2026	2,223,300
3,000,000	Piedmont Municipal Power Agency, SC, Electric Revenue Refunding Bonds (Series 2009A-3), 5.00%, 1/1/2018	3,030,660
	TOTAL	8,187,406
	Tennessee—0.4%
1,335,000	Metropolitan Government of Nashville & Davidson County, TN Health & Educational Facilities Board (Vanderbilt University Medical Center), Revenue Bonds (Series 2016A), 5.00%, 7/1/2046	1,483,759
	Texas—10.0%
2,795,000	Bexar County, Health Facilities Development Corp. (Army Retirement Residence Foundation), Revenue Bonds (Series 2010), 6.20% (United States Treasury PRF 7/1/2020@100), 7/1/2045	3,177,524

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Principal Amount			Value
		MUNICIPAL BONDS—continued
		Texas—continued
$2,225,000		Dallas, TX Area Rapid Transit, Senior Lien Sales Tax Revenue Refunding Bonds (Series 2016A), 5.00%, 12/1/2048	$2,552,253
4,000,000		Dallas-Fort Worth, TX International Airport, Joint Revenue Refunding Bonds (Series 2012B), 5.00%, 11/1/2035	4,415,440
2,000,000		Harris County, TX Cultural Education Facilities Finance Corp. (Memorial Hermann Health System), Hospital Revenue Bonds (Series 2014A), 5.00%, 12/1/2029	2,318,540
2,000,000		Houston, TX Airport System, Senior Lien Revenue & Refunding Bonds (Series 2009A), 5.50% (Original Issue Yield: 5.67%), 7/1/2034	2,066,840
3,000,000		Houston, TX Combined Utility System, First Lien Revenue & Refunding Bonds (Series 2016B), 4.00%, 11/15/2037	3,154,590
3,000,000	1	Houston, TX Combined Utility System, First Lien Revenue Refunding Bonds (Series 2012A) FRNs, 1.84% (SIFMA 7-day +0.900%), 5/1/2020	3,025,020
2,500,000		North Texas Tollway Authority, System First Tier Revenue Refunding Bonds (Series 2011B), 5.00% (Original Issue Yield: 5.12%), 1/1/2038	2,677,150
1,000,000		North Texas Tollway Authority, System First Tier Revenue Refunding Bonds (Series 2016A), 4.00%, 1/1/2039	1,049,450
1,500,000		San Antonio, TX Electric & Gas System, Revenue Refunding Bonds (New Series 2015), 5.00%, 2/1/2032	1,771,980
2,000,000		San Antonio, TX Electric & Gas System, Revenue Refunding Bonds (Series 2016), 4.00%, 2/1/2034	2,155,820
2,030,000		Texas Municipal Gas Acquisition & Supply Corp. I, Gas Supply Senior Lien Revenue Bonds (Series 2006A), 5.25% (Bank of America Corp. GTD), 12/15/2026	2,402,302
3,000,000		Trinity River Authority Texas Regional Wastewater System, Revenue Refunding Bonds (Series 2016), 5.00%, 8/1/2026	3,706,620
		TOTAL	34,473,529
		Virginia—0.9%
1,200,000		Chesapeake Bay Bridge & Tunnel District, VA, First Tier General Resolution Revenue Bonds (Series 2016), 5.00%, 7/1/2051	1,333,704
1,500,000		Hampton Roads, VA Sanitation District, Subordinate Wastewater Revenue Bonds (Series 2016A), 5.00%, 8/1/2043	1,740,195
		TOTAL	3,073,899
		Washington—2.6%
2,570,000		Energy Northwest, WA, Project 3 Electric Revenue Refunding Bonds (Series 2014-C), 5.00%, 7/1/2028	3,020,264
1,250,000		Washington State Health Care Facilities Authority (Providence St. Joseph Health), Health Care Facilities Revenue Bonds (Series 2014C), 5.00%, 10/1/2044	1,389,375
4,000,000		Washington State, UT GO Bonds (Series 2015A-1), 5.00%, 8/1/2040	4,639,800
		TOTAL	9,049,439

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11

Principal Amount			Value
		MUNICIPAL BONDS—continued
		West Virginia—0.8%
$2,500,000		West Virginia University Board of Governors (West Virginia University), Refunding and Improvement Revenue Bonds (Series 2013A), 5.00%, 10/1/2035	$2,839,600
		Wisconsin—2.9%
5,540,000		Wisconsin State General Fund Appropriation (Wisconsin State), Revenue Bonds (Series 2009A), 6.00% (United States Treasury PRF 5/1/2019@100), 5/1/2033	5,978,602
3,000,000		Wisconsin State HEFA (ProHealth Care, Inc.), Revenue Bonds (Series 2009), 6.625% (United States Treasury PRF 2/15/2019@100)/(Original Issue Yield: 6.87%), 2/15/2039	3,229,650
800,000		Wisconsin State HEFA (ProHealth Care, Inc.), Revenue Refunding Bonds (Series 2015), 5.00%, 8/15/2039	885,640
		TOTAL	10,093,892
		TOTAL MUNICIPAL BONDS (IDENTIFIED COST $325,723,765)	341,335,333
		SHORT-TERM MUNICIPALS—1.7%
		Florida—0.9%
3,000,000	1	Lee County, FL IDA, (Series 2016A) Daily VRDNs (Florida Power & Light Co.), 1.05%, 10/2/2017	3,000,000
		New York—0.1%
400,000	1	New York State Mortgage Agency, (Series 144) Daily VRDNs (JPMorgan Chase Bank, N.A. LIQ), 1.03%, 10/2/2017	400,000
		Virginia—0.1%
300,000	1	King George County IDA, VA (Birchwood Power Partners LP Project), (Series 1996A) Daily VRDNs (Mizuho Bank Ltd. LOC), 0.95%, 10/2/2017	300,000
		Wyoming—0.6%
2,100,000	1	Sweetwater County, WY Environmental Improvement (Pacificorp), (Series 1995) Daily VRDNs (Bank of Nova Scotia, Toronto LOC), 0.98%, 10/2/2017	2,100,000
		TOTAL SHORT-TERM MUNICIPALS (IDENTIFIED COST $5,800,000)	5,800,000
		TOTAL INVESTMENT IN SECURITIES—100.4% (IDENTIFIED COST $331,523,765)4	347,135,333
		OTHER ASSETS AND LIABILITIES - NET—(0.4)%5	(1,349,529)
		TOTAL NET ASSETS—100%	$345,785,804

Securities that are subject to the federal alternative minimum tax (AMT) represent 2.9% of the Fund's portfolio as calculated based upon total market value.

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12

1	Floating/variable note with current rate and current maturity or next reset date shown. Certain variable rate securities are not based on a published reference rate and spread but are determined by the issuer or agent and are based on current market conditions. These securities do not indicate a reference rate and spread in their description above.
2	Non-income-producing security.
3	Denotes a restricted security that either: (a) cannot be offered for public sale without first being registered, or availing of an exemption from registration, under the Securities Act of 1933; or (b) is subject to a contractual restriction on public sales. At September 30, 2017, these restricted securities amounted to $312,646, which represented 0.1% of total net assets.
4	The cost of investments for federal tax purposes amounts to $331,519,947.
5	Assets, other than investments in securities, less liabilities. See Statement of Assets and Liabilities.

Note: The categories of investments are shown as a percentage of total net assets at September 30, 2017.

Various inputs are used in determining the value of the Fund's investments. These inputs are summarized in the three broad levels listed below:

Level 1—quoted prices in active markets for identical securities.

Level 2—other significant observable inputs (including quoted prices for similar securities, interest rates, prepayment speeds, credit risk, etc.). Also includes securities valued at amortized cost.

Level 3—significant unobservable inputs (including the Fund's own assumptions in determining the fair value of investments).

The inputs or methodology used for valuing securities are not an indication of the risk associated with investing in those securities.

As of September 30, 2017, all investments of the Fund utilized Level 2 inputs in valuing the Fund's assets carried at fair value.

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13

The following acronyms are used throughout this portfolio:

AGM	—Assured Guaranty Municipal Corp.
EDA	—Economic Development Authority
EDFA	—Economic Development Finance Authority
FRNs	—Floating Rate Notes
GO	—General Obligation
GTD	—Guaranteed
HDA	—Hospital Development Authority
HEFA	—Health and Education Facilities Authority
HFA	—Housing Finance Authority
IDA	—Industrial Development Authority
IDB	—Industrial Development Bond
INS	—Insured
LIBOR	—London Interbank Offered Rate
LIQ	—Liquidity Agreement
LOC	—Letter of Credit
PCR	—Pollution Control Revenue
PILOT	—Payment in Lieu of Taxes
PRF	—Pre-refunded
SIFMA	—Securities Industry and Financial Markets Association
TFA	—Transitional Finance Authority
UT	—Unlimited Tax
VRDNs	—Variable Rate Demand Notes

See Notes which are an integral part of the Financial Statements

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Financial Highlights–Class A Shares

(For a Share Outstanding Throughout Each Period)

	Six Months Ended (unaudited) 9/30/2017	Year Ended March 31,
		2017	2016	2015	2014	2013
Net Asset Value, Beginning of Period	$10.38	$10.68	$10.66	$10.27	$10.73	$10.42
Income From Investment Operations:
Net investment income1	0.15	0.33	0.33	0.34	0.35	0.36
Net realized and unrealized gain (loss) on investments and futures contracts	0.14	(0.31)	0.01	0.39	(0.46)	0.30
TOTAL FROM INVESTMENT OPERATIONS	0.29	0.02	0.34	0.73	(0.11)	0.66
Less Distributions:
Distributions from net investment income	(0.15)	(0.32)	(0.32)	(0.34)	(0.35)	(0.35)
Net Asset Value, End of Period	$10.52	$10.38	$10.68	$10.66	$10.27	$10.73
Total Return2	2.84%	0.13%	3.31%	7.16%	(0.97)%	6.43%
Ratios to Average Net Assets:
Net expenses	0.86%3	0.87%	0.87%	0.87%	0.87%	0.87%
Net investment income	2.88%3	3.06%	3.10%	3.23%	3.42%	3.33%
Expense waiver/reimbursement4	0.08%3	0.07%	0.07%	0.08%	0.08%	0.07%
Supplemental Data:
Net assets, end of period (000 omitted)	$298,164	$304,271	$331,876	$346,803	$355,711	$454,722
Portfolio turnover	10%	14%	25%	16%	8%	22%

1	Per share number has been calculated using the average shares method.
2	Based on net asset value, which does not reflect the sales charge, redemption fee or contingent deferred sales charge, if applicable. Total returns for periods of less than one year are not annualized.
3	Computed on an annualized basis.
4	This expense decrease is reflected in both the net expense and net investment income ratios shown above.

See Notes which are an integral part of the Financial Statements

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Financial Highlights–Class B Shares

(For a Share Outstanding Throughout Each Period)

	Six Months Ended (unaudited) 9/30/2017	Year Ended March 31,
		2017	2016	2015	2014	2013
Net Asset Value, Beginning of Period	$10.38	$10.69	$10.66	$10.27	$10.73	$10.42
Income From Investment Operations:
Net investment income1	0.11	0.24	0.24	0.25	0.27	0.27
Net realized and unrealized gain (loss) on investments and futures contracts	0.15	(0.32)	0.03	0.39	(0.47)	0.31
TOTAL FROM INVESTMENT OPERATIONS	0.26	(0.08)	0.27	0.64	(0.20)	0.58
Less Distributions:
Distributions from net investment income	(0.11)	(0.23)	(0.24)	(0.25)	(0.26)	(0.27)
Net Asset Value, End of Period	$10.53	$10.38	$10.69	$10.66	$10.27	$10.73
Total Return2	2.52%	(0.80)%	2.54%	6.28%	(1.79)%	5.57%
Ratios to Average Net Assets:
Net expenses	1.66%3	1.68%	1.69%	1.70%	1.71%	1.69%
Net investment income	2.09%3	2.25%	2.28%	2.40%	2.59%	2.52%
Expense waiver/reimbursement4	0.04%3	0.01%	0.00%5	0.00%	0.00%	0.00%5
Supplemental Data:
Net assets, end of period (000 omitted)	$3,755	$4,061	$5,732	$7,303	$8,292	$11,434
Portfolio turnover	10%	14%	25%	16%	8%	22%

1	Per share number has been calculated using the average shares method.
2	Based on net asset value, which does not reflect the sales charge, redemption fee or contingent deferred sales charge, if applicable. Total returns for periods of less than one year are not annualized.
3	Computed on an annualized basis.
4	This expense decrease is reflected in both the net expense and net investment income ratios shown above.
5	Represents less than 0.01%.

See Notes which are an integral part of the Financial Statements

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Financial Highlights–Class C Shares

(For a Share Outstanding Throughout Each Period)

	Six Months Ended (unaudited) 9/30/2017	Year Ended March 31,
		2017	2016	2015	2014	2013
Net Asset Value, Beginning of Period	$10.39	$10.69	$10.66	$10.27	$10.73	$10.42
Income From Investment Operations:
Net investment income1	0.11	0.24	0.24	0.25	0.27	0.27
Net realized and unrealized gain (loss) on investments and futures contracts	0.14	(0.31)	0.03	0.39	(0.47)	0.31
TOTAL FROM INVESTMENT OPERATIONS	0.25	(0.07)	0.27	0.64	(0.20)	0.58
Less Distributions:
Distributions from net investment income	(0.11)	(0.23)	(0.24)	(0.25)	(0.26)	(0.27)
Net Asset Value, End of Period	$10.53	$10.39	$10.69	$10.66	$10.27	$10.73
Total Return2	2.42%	(0.71)%	2.54%	6.27%	(1.79)%	5.57%
Ratios to Average Net Assets:
Net expenses	1.66%3	1.68%	1.69%	1.70%	1.71%	1.69%
Net investment income	2.09%3	2.25%	2.28%	2.40%	2.59%	2.52%
Expense waiver/reimbursement4	0.04%3	0.01%	0.00%5	0.00%	0.00%	0.00%5
Supplemental Data:
Net assets, end of period (000 omitted)	$15,929	$17,548	$20,372	$19,001	$18,047	$27,246
Portfolio turnover	10%	14%	25%	16%	8%	22%

1	Per share number has been calculated using the average shares method.
2	Based on net asset value, which does not reflect the sales charge, redemption fee or contingent deferred sales charge, if applicable. Total returns for periods of less than one year are not annualized.
3	Computed on an annualized basis.
4	This expense decrease is reflected in both the net expense and net investment income ratios shown above.
5	Represents less than 0.01%.

See Notes which are an integral part of the Financial Statements

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Financial Highlights–Class F Shares

(For a Share Outstanding Throughout Each Period)

	Six Months Ended (unaudited) 9/30/2017	Year Ended March 31,
		2017	2016	2015	2014	2013
Net Asset Value, Beginning of Period	$10.37	$10.68	$10.66	$10.27	$10.73	$10.42
Income From Investment Operations:
Net investment income1	0.15	0.32	0.33	0.34	0.35	0.36
Net realized and unrealized gain (loss) on investments and futures contracts	0.15	(0.31)	0.01	0.39	(0.46)	0.30
TOTAL FROM INVESTMENT OPERATIONS	0.30	0.01	0.34	0.73	(0.11)	0.66
Less Distributions:
Distributions from net investment income	(0.15)	(0.32)	(0.32)	(0.34)	(0.35)	(0.35)
Net Asset Value, End of Period	$10.52	$10.37	$10.68	$10.66	$10.27	$10.73
Total Return2	2.94%	0.03%	3.31%	7.17%	(0.97)%	6.43%
Ratios to Average Net Assets:
Net expenses	0.86%3	0.87%	0.87%	0.87%	0.87%	0.87%
Net investment income	2.88%3	3.06%	3.09%	3.23%	3.42%	3.33%
Expense waiver/reimbursement4	0.08%3	0.07%	0.07%	0.08%	0.08%	0.07%
Supplemental Data:
Net assets, end of period (000 omitted)	$27,673	$27,604	$24,558	$20,604	$19,359	$25,420
Portfolio turnover	10%	14%	25%	16%	8%	22%

1	Per share number has been calculated using the average shares method.
2	Based on net asset value, which does not reflect the sales charge, redemption fee or contingent deferred sales charge, if applicable. Total returns for periods of less than one year are not annualized.
3	Computed on an annualized basis.
4	This expense decrease is reflected in both the net expense and net investment income ratios shown above.

See Notes which are an integral part of the Financial Statements

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Financial Highlights–Institutional Shares

(For a Share Outstanding Throughout the Period)

	Six Months Ended (unaudited) 9/30/20171
Net Asset Value, Beginning of Period	$10.52
Income From Investment Operations:
Net investment income2	0.06
Net realized and unrealized (loss) on investments and futures contracts	(0.03)
TOTAL FROM INVESTMENT OPERATIONS	0.03
Less Distributions:
Distributions from net investment income	(0.03)
Net Asset Value, End of Period	$10.52
Total Return3	0.29%
Ratios to Average Net Assets:
Net expenses	0.59%4
Net investment income	3.08%4
Expense waiver/reimbursement5	0.12%4
Supplemental Data:
Net assets, end of period (000 omitted)	$264
Portfolio turnover	10%6

1	Reflects operations for the period July 27, 2017 (date of initial investment) to September 30, 2017.
2	Per share number has been calculated using the average shares method.
3	Based on net asset value. Total returns for periods of less than one year are not annualized.
4	Computed on an annualized basis.
5	This expense decrease is reflected in both the net expense and net investment income ratios shown above.
6	Portfolio turnover is calculated at the Fund level. Percentage indicated was calculated for the six months ended September 30, 2017.

See Notes which are an integral part of the Financial Statements

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Statement of Assets and Liabilities

September 30, 2017 (unaudited)

Assets:
Investment in securities, at value (identified cost $331,523,765)		$347,135,333
Cash		31,329
Income receivable		4,340,917
Receivable for shares sold		28,274
TOTAL ASSETS		351,535,853
Liabilities:
Payable for investments purchased	$5,058,975
Payable for shares redeemed	376,145
Income distribution payable	113,645
Payable for other service fees (Notes 2 and 5)	109,208
Payable for distribution services fee (Note 5)	12,226
Payable for investment adviser fee (Note 5)	6,541
Payable for administrative fee (Note 5)	1,517
Accrued expenses (Note 5)	71,792
TOTAL LIABILITIES		5,750,049
Net assets for 32,875,671 shares outstanding		$345,785,804
Net Assets Consists of:
Paid-in capital		$335,284,551
Net unrealized appreciation of investments		15,611,568
Accumulated net realized loss on investments and futures contracts		(5,119,714)
Undistributed net investment income		9,399
TOTAL NET ASSETS		$345,785,804

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Statement of Assets and Liabilities–continued

Net Asset Value, Offering Price and Redemption Proceeds Per Share:
Class A Shares:
Net asset value per share ($298,164,260 ÷ 28,348,904 shares outstanding) $0.01 par value, 250,000,000 shares authorized	$10.52
Offering price per share (100/95.50 of $10.52)	$11.02
Redemption proceeds per share	$10.52
Class B Shares:
Net asset value per share ($3,755,303 ÷ 356,766 shares outstanding) $0.01 par value, 50,000,000 shares authorized	$10.53
Offering price per share	$10.53
Redemption proceeds per share (94.50/100 of $10.53)	$9.95
Class C Shares:
Net asset value per share ($15,929,127 ÷ 1,513,270 shares outstanding) $0.01 par value, 50,000,000 shares authorized	$10.53
Offering price per share	$10.53
Redemption proceeds per share (99.00/100 of $10.53)	$10.42
Class F Shares:
Net asset value per share ($27,673,226 ÷ 2,631,649 shares outstanding) $0.01 par value, 50,000,000 shares authorized	$10.52
Offering price per share (100/99.00 of $10.52)	$10.63
Redemption proceeds per share (99.00/100 of $10.52)	$10.41
Institutional Shares:
Net asset value per share ($263,888 ÷ 25,082 shares outstanding) $0.01 par value, 300,000,000 shares authorized	$10.52
Offering price per share	$10.52
Redemption proceeds per share	$10.52

See Notes which are an integral part of the Financial Statements

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21

Statement of Operations

Six Months Ended September 30, 2017 (unaudited)

Investment Income:
Interest			$6,580,828
Expenses:
Investment adviser fee (Note 5)		$821,575
Administrative fee (Note 5)		138,664
Custodian fees		7,922
Transfer agent fees		108,949
Directors'/Trustees' fees (Note 5)		5,571
Auditing fees		15,241
Legal fees		5,054
Distribution services fee (Note 5)		77,160
Other service fees (Notes 2 and 5)		437,128
Portfolio accounting fees		52,903
Share registration costs		38,051
Printing and postage		15,906
Miscellaneous (Note 5)		14,171
TOTAL EXPENSES		1,738,295
Waivers and Reimbursement:
Waiver of investment adviser fee (Note 5)	$(70,579)
Waiver/reimbursement of other operating expenses (Notes 2 and 5)	(68,463)
TOTAL WAIVERS AND REIMBURSEMENT		(139,042)
Net expenses			1,599,253
Net investment income			4,981,575
Realized and Unrealized Gain (Loss) on Investments and Futures Contracts:
Net realized gain on investments			1,873,793
Net realized loss on futures contracts			(23,558)
Net change in unrealized appreciation of investments			2,967,165
Net realized and unrealized gain on investments and futures contracts			4,817,400
Change in net assets resulting from operations			$9,798,975

See Notes which are an integral part of the Financial Statements

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Statement of Changes in Net Assets

	Six Months Ended (unaudited) 9/30/2017	Year Ended 3/31/2017
Increase (Decrease) in Net Assets
Operations:
Net investment income	$4,981,575	$11,198,666
Net realized gain on investments and futures contracts	1,850,235	2,109,561
Net change in unrealized appreciation/depreciation of investments	2,967,165	(13,034,249)
CHANGE IN NET ASSETS RESULTING FROM OPERATIONS	9,798,975	273,978
Distributions to Shareholders:
Distributions from net investment income
Class A Shares	(4,410,520)	(9,533,888)
Class B Shares	(41,142)	(103,576)
Class C Shares	(175,225)	(418,279)
Class F Shares	(402,691)	(812,056)
Institutional Shares	(759)	—
CHANGE IN NET ASSETS RESULTING FROM DISTRIBUTIONS TO SHAREHOLDERS	(5,030,337)	(10,867,799)
Share Transactions:
Proceeds from sale of shares	11,359,548	33,108,539
Net asset value of shares issued to shareholders in payment of distributions declared	4,301,071	9,224,728
Cost of shares redeemed	(28,126,599)	(60,794,296)
CHANGE IN NET ASSETS RESULTING FROM SHARE TRANSACTIONS	(12,465,980)	(18,461,029)
Change in net assets	(7,697,342)	(29,054,850)
Net Assets:
Beginning of period	353,483,146	382,537,996
End of period (including undistributed net investment income of $9,399 and $58,161, respectively)	$345,785,804	$353,483,146

See Notes which are an integral part of the Financial Statements

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Notes to Financial Statements

September 30, 2017 (unaudited)

1. ORGANIZATION

Federated Municipal Bond Fund, Inc. (formerly, Federated Municipal Securities Fund, Inc.) (the “Fund”) is registered under the Investment Company Act of 1940, as amended (the “Act”), as a diversified, open-end management investment company. The Fund offers five classes of shares: Class A Shares, Class B Shares, Class C Shares, Class F Shares and Institutional Shares. All shares of the Fund have equal rights with respect to voting, except on class-specific matters. Class B Shares were closed to new accounts/investors on June 1, 2015 and to new purchases/exchanges by existing shareholders on August 1, 2015. The investment objective of the Fund is to provide for its shareholders a high level of current income which is exempt from federal regular income tax. Interest income from the Fund's investments normally will not be subject to the federal AMT for individuals and corporations, but may be subject to state and local taxes.

On March 30, 2017, the Fund's T Share class became effective with the Securities and Exchange Commission (SEC), but is not yet offered for sale.

Effective July 27, 2017, the Fund began offering Institutional Shares.

2. SIGNIFICANT ACCOUNTING POLICIES

The following is a summary of significant accounting policies consistently followed by the Fund in the preparation of its financial statements. These policies are in conformity with U.S. generally accepted accounting principles (GAAP).

Investment Valuation

In calculating its net asset value (NAV), the Fund generally values investments as follows:

■	Fixed-income securities are fair valued using price evaluations provided by a pricing service approved by the Fund's Board of Directors (the “Directors”).
■	Shares of other mutual funds or non-exchange-traded investment companies are valued based upon their reported NAVs.
■	Derivative contracts listed on exchanges are valued at their reported settlement or closing price, except that options are valued at the mean of closing bid and asked quotations.
■	Over-the-counter (OTC) derivative contracts are fair valued using price evaluations provided by a pricing service approved by the Directors.
■	For securities that are fair valued in accordance with procedures established by and under the general supervision of the Directors, certain factors may be considered such as: the last traded or purchase price of the security, information obtained by contacting the issuer or dealers, analysis of the issuer's financial statements or other available documents, fundamental analytical data, the nature and duration of restrictions on disposition, the movement of the market in which the security is normally traded, public trading in similar securities or derivative contracts of the issuer or comparable issuers, movement of a relevant index, or other factors including but not limited to industry changes and relevant government actions.

If any price, quotation, price evaluation or other pricing source is not readily available when the NAV is calculated, if the Fund cannot obtain price evaluations from a pricing service or from more than one dealer for an investment within a reasonable period of time as set forth in the Fund's valuation policies and procedures, or if information furnished by a pricing service, in the opinion of the valuation committee (“Valuation Committee”), is deemed not

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representative of the fair value of such security, the Fund uses the fair value of the investment determined in accordance with the procedures described below. There can be no assurance that the Fund could obtain the fair value assigned to an investment if it sold the investment at approximately the time at which the Fund determines its NAV per share.

Fair Valuation Procedures

The Directors have ultimate responsibility for determining the fair value of investments for which market quotations are not readily available. The Directors have appointed a Valuation Committee comprised of officers of the Fund, Federated Investment Management Company (“Adviser”) and certain of the Adviser's affiliated companies to assist in determining fair value and in overseeing the calculation of the NAV. The Directors have also authorized the use of pricing services recommended by the Valuation Committee to provide fair value evaluations of the current value of certain investments for purposes of calculating the NAV. The Valuation Committee employs various methods for reviewing third-party pricing-service evaluations including periodic reviews of third-party pricing services' policies, procedures and valuation methods (including key inputs, methods, models and assumptions), transactional back-testing, comparisons of evaluations of different pricing services and review of price challenges by the Adviser based on recent market activity. In the event that market quotations and price evaluations are not available for an investment, the Valuation Committee determines the fair value of the investment in accordance with procedures adopted by the Directors. The Directors periodically review and approve the fair valuations made by the Valuation Committee and any changes made to the procedures.

Factors considered by pricing services in evaluating an investment include the yields or prices of investments of comparable quality, coupon, maturity, call rights and other potential prepayments, terms and type, reported transactions, indications as to values from dealers and general market conditions. Some pricing services provide a single price evaluation reflecting the bid-side of the market for an investment (a “bid” evaluation). Other pricing services offer both bid evaluations and price evaluations indicative of a price between the prices bid and asked for the investment (a “mid” evaluation). The Fund normally uses bid evaluations for any U.S. Treasury and Agency securities, mortgage-backed securities and municipal securities. The Fund normally uses mid evaluations for any other types of fixed-income securities and any OTC derivative contracts. In the event that market quotations and price evaluations are not available for an investment, the fair value of the investment is determined in accordance with procedures adopted by the Directors.

Investment Income, Gains and Losses, Expenses and Distributions

Investment transactions are accounted for on a trade-date basis. Realized gains and losses from investment transactions are recorded on an identified-cost basis. Interest income and expenses are accrued daily. Dividend income and distributions to shareholders are recorded on the ex-dividend date. Distributions of net investment income, if any, are declared daily and paid monthly. Non-cash dividends included in dividend income, if any, are recorded at fair value. Amortization/accretion of premium and discount is included in investment income. Investment income, realized and unrealized gains and losses and certain fund-level expenses are allocated to each class based on relative average daily net assets, except that Class A Shares, Class B Shares, Class C Shares, Class F Shares and Institutional Shares may bear distribution services fees and other service fees unique to those classes. The detail of the total fund waivers and reimbursement of $139,042 is disclosed in various locations in this Note 2 and Note 5.

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Dividends are declared separately for each class. No class has preferential dividend rights; differences in per share dividend rates are generally due to differences in separate class expenses.

Other Service Fees

The Fund may pay other service fees up to 0.25% of the average daily net assets of the Fund's Class A Shares, Class B Shares, Class C Shares and Class F Shares to unaffiliated financial intermediaries or to Federated Shareholder Services Company (FSSC) for providing services to shareholders and maintaining shareholder accounts. Subject to the terms described in the Expense Limitation note, FSSC may voluntarily reimburse the Fund for other service fees. For the six months ended September 30, 2017, other service fees for the Fund were as follows:

	Other Service Fees Incurred	Other Service Fees Reimbursed
Class A Shares	$376,831	$(62,651)
Class B Shares	4,896	—
Class C Shares	20,825	—
Class F Shares	34,576	(5,812)
TOTAL	$437,128	$(68,463)

Federal Taxes

It is the Fund's policy to comply with the Subchapter M provision of the Internal Revenue Code (the “Code”) and to distribute to shareholders each year substantially all of its income. Accordingly, no provision for federal income tax is necessary. As of and during the six months ended September 30, 2017, the Fund did not have a liability for any uncertain tax positions. The Fund recognizes interest and penalties, if any, related to tax liabilities as income tax expense in the Statement of Operations. As of September 30, 2017, tax years 2014 through 2017 remain subject to examination by the Fund's major tax jurisdictions, which include the United States of America, the state of Maryland and the Commonwealth of Pennsylvania.

When-Issued and Delayed-Delivery Transactions

The Fund may engage in when-issued or delayed-delivery transactions. The Fund records when-issued securities on the trade date and maintains security positions such that sufficient liquid assets will be available to make payment for the securities purchased. Securities purchased on a when-issued or delayed-delivery basis are marked to market daily and begin earning interest on the settlement date. Losses may occur on these transactions due to changes in market conditions or the failure of counterparties to perform under the contract.

Futures Contracts

The Fund purchases and sells financial futures contracts to seek to increase return and to manage duration and yield curve risks. Upon entering into a financial futures contract with a broker, the Fund is required to deposit in a segregated account either U.S. government securities or a specified amount of Restricted Cash, which is shown in the Statement of Assets and Liabilities. Futures contracts are valued daily and unrealized gains or losses are recorded in a “variation margin” account. Daily, the Fund receives from or pays to the broker a specified amount of cash based upon changes in the variation margin account. When a contract is closed, the Fund recognizes a realized gain or loss. Futures contracts have market risks, including the risk that the change in the value of the contract may not correlate with the

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changes in the value of the underlying securities. There is minimal counterparty risk to the Fund since futures contracts are exchange-traded and the exchange's clearing house, as counterparty to all exchange-traded futures contracts, guarantees the futures contracts against default.

At September 30, 2017, the Fund had no outstanding futures contracts.

The average notional value of long futures contracts held by the Fund throughout the period was $3,955,067. This is based on amounts held as of each month-end throughout the six-month fiscal period.

Restricted Securities

The Fund may purchase securities which are considered restricted. Restricted securities are securities that either: (a) cannot be offered for public sale without first being registered, or being able to take advantage of an exemption from registration, under the Securities Act of 1933; or (b) are subject to contractual restrictions on public sales. In some cases, when a security cannot be offered for public sale without first being registered, the issuer of the restricted security has agreed to register such securities for resale, at the issuer's expense, either upon demand by the Fund or in connection with another registered offering of the securities. Many such restricted securities may be resold in the secondary market in transactions exempt from registration. Restricted securities may be determined to be liquid under criteria established by the Directors. The Fund will not incur any registration costs upon such resales. The Fund's restricted securities, like other securities, are priced in accordance with procedures established by and under the general supervision of the Directors.

Additional information on restricted securities held at September 30, 2017 is as follows:

Security	Acquisition Date	Cost	Market Value
Director of the State of Nevada Department of Business and Industry (Doral Academy of Nevada), Charter School Revenue Bonds (Series 2017A), 5.00%, 7/15/2047	8/31/2017	$312,387	$312,646

The Effect of Derivative Instruments on the Statement of Operations for the Six Months ended September 30, 2017

Amount of Realized Gain or (Loss) on Derivatives Recognized in Income
	Futures Contracts
Interest rate contracts	$(23,558)

Other

The preparation of financial statements in conformity with GAAP requires management to make estimates and assumptions that affect the amounts of assets, liabilities, expenses and revenues reported in the financial statements. Actual results could differ from those estimated. The Fund applies investment company accounting and reporting guidance.

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3. CAPITAL STOCK

The following tables summarize capital stock activity:

	Six Months Ended 9/30/2017		Year Ended 3/31/2017
Class A Shares:	Shares	Amount	Shares	Amount
Shares sold	792,595	$8,339,932	2,165,902	$22,910,745
Shares issued to shareholders in payment of distributions declared	353,261	3,711,444	751,532	7,971,365
Shares redeemed	(2,119,459)	(22,267,105)	(4,668,837)	(49,456,309)
NET CHANGE RESULTING FROM CLASS A SHARE TRANSACTIONS	(973,603)	$(10,215,729)	(1,751,403)	$(18,574,199)

	Six Months Ended 9/30/2017		Year Ended 3/31/2017
Class B Shares:	Shares	Amount	Shares	Amount
Shares issued to shareholders in payment of distributions declared	3,860	$40,582	9,682	$102,871
Shares redeemed	(38,143)	(400,522)	(155,014)	(1,652,607)
NET CHANGE RESULTING FROM CLASS B SHARE TRANSACTIONS	(34,283)	$(359,940)	(145,332)	$(1,549,736)

	Six Months Ended 9/30/2017		Year Ended 3/31/2017
Class C Shares:	Shares	Amount	Shares	Amount
Shares sold	93,720	$983,798	260,580	$2,748,137
Shares issued to shareholders in payment of distributions declared	14,271	150,056	32,687	346,933
Shares redeemed	(284,436)	(2,987,868)	(509,897)	(5,356,513)
NET CHANGE RESULTING FROM CLASS C SHARE TRANSACTIONS	(176,445)	$(1,854,014)	(216,630)	$(2,261,443)

	Six Months Ended 9/30/2017		Year Ended 3/31/2017
Class F Shares:	Shares	Amount	Shares	Amount
Shares sold	168,614	$1,771,718	696,775	$7,449,657
Shares issued to shareholders in payment of distributions declared	37,916	398,231	75,863	803,559
Shares redeemed	(235,548)	(2,471,104)	(411,685)	(4,328,867)
NET CHANGE RESULTING FROM CLASS F SHARE TRANSACTIONS	(29,018)	$(301,155)	360,953	$3,924,349

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	Six Months Ended 9/30/20171		Year Ended 3/31/2017
Institutional Shares:	Shares	Amount	Shares	Amount
Shares sold	25,010	$264,100	—	$—
Shares issued to shareholders in payment of distributions declared	72	758	—	—
NET CHANGE RESULTING FROM INSTITUTIONAL SHARE TRANSACTIONS	25,082	$264,858	—	$—
NET CHANGE RESULTING FROM TOTAL FUND SHARE TRANSACTIONS	(1,188,267)	$(12,465,980)	(1,752,412)	$(18,461,029)

1 Reflects operations for the period July 27, 2017 (date of initial investment) to September 30, 2017.

4. FEDERAL TAX INFORMATION

At September 30, 2017, the cost of investments for federal tax purposes was $331,519,947. The net unrealized appreciation of investments for federal tax purposes was $15,615,386. This consists of net unrealized appreciation from investments for those securities having an excess of value over cost of $16,557,586 and net unrealized depreciation from investments for those securities having an excess of cost over value of $942,200.

At March 31, 2017, the Fund had a capital loss carryforward of $7,068,459 which will reduce the Fund's taxable income arising from future net realized gains on investments, if any, to the extent permitted by the Code, thereby reducing the amount of distributions to shareholders which would otherwise be necessary to relieve the Fund of any liability for federal income tax. Pursuant to the Code, a net capital loss incurred in taxable years beginning on or before December 22, 2010, is characterized as short-term and may be carried forward for a maximum of eight tax years (“Carryforward Limit”), whereas a net capital loss incurred in taxable years beginning after December 22, 2010, retains its character as either short-term or long-term, does not expire and is required to be utilized prior to the losses which have a Carryforward Limit.

The following schedule summarizes the Fund's capital loss carryforwards and expiration years:

Expiration Year	Short-Term	Long-Term	Total
2018	$7,068,459	NA	$7,068,459

5. INVESTMENT ADVISER FEE AND OTHER TRANSACTIONS WITH AFFILIATES

Investment Adviser Fee

The advisory agreement between the Fund and the Adviser provides for an annual fee equal to: (a) 0.30% of the Fund's average daily net assets; and (b) 4.50% of the gross income of the Fund, excluding capital gains or losses. Subject to the terms described in the Expense Limitation note, the Adviser may voluntarily choose to waive any portion of its fee. For the six months ended September 30, 2017, the Adviser voluntarily waived $70,579 of its fee.

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Administrative Fee

Federated Administrative Services (FAS), under the Administrative Services Agreement, provides the Fund with administrative personnel and services. For purposes of determining the appropriate rate breakpoint, “Investment Complex” is defined as all of the Federated Funds subject to a fee under the Administrative Services Agreement. The fee paid to FAS is based on the average daily net assets of the Investment Complex as specified below:

Administrative Fee	Average Daily Net Assets of the Investment Complex
0.100%	on assets up to $50 billion
0.075%	on assets over $50 billion

Subject to the terms described in the Expense Limitation note, FAS may voluntarily choose to waive any portion of its fee. For the six months ended September 30, 2017, the annualized fee paid to FAS was 0.079% of average daily net assets of the Fund.

Prior to September 1, 2017, the breakpoints of the Administrative Fee paid to FAS, described above, were:

Administrative Fee	Average Daily Net Assets of the Investment Complex
0.150%	on the first $5 billion
0.125%	on the next $5 billion
0.100%	on the next $10 billion
0.075%	on assets over $20 billion

In addition, FAS may charge certain out-of-pocket expenses to the Fund.

Distribution Services Fee

The Fund has adopted a Distribution Plan (the “Plan”) pursuant to Rule 12b-1 under the Act. Under the terms of the Plan, the Fund will compensate Federated Securities Corp. (FSC), the principal distributor, from the daily net assets of the Fund's Class B Shares and Class C Shares to finance activities intended to result in the sale of these shares. The Plan provides that the Fund may incur distribution expenses at the following percentages of average daily net assets annually, to compensate FSC:

Share Class Name	Percentage of Average Daily Net Assets of Class
Class B Shares	0.75%
Class C Shares	0.75%

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Subject to the terms described in the Expense Limitation note, FSC may voluntarily choose to waive any portion of its fee. For the six months ended September 30, 2017, distribution services fees for the Fund were as follows:

	Distribution Service Fees Incurred
Class B Shares	$14,687
Class C Shares	62,473
TOTAL	$77,160

When FSC receives fees, it may pay some or all of them to financial intermediaries whose customers purchase shares. For the six months ended September 30, 2017, FSC retained $19,853 of fees paid by the Fund.

Sales Charges

Front-end sales charges and contingent deferred sales charges (CDSC) do not represent expenses of the Fund. They are deducted from the proceeds of sales of Fund shares prior to investment or from redemption proceeds prior to remittance, as applicable. For the six months ended September 30, 2017, FSC retained $13,083 and $189 in sales charges from the sale of Class A Shares and Class F Shares, respectively. FSC also retained $936, $1,441, $410 and $3,649 of CDSC relating to redemptions of Class A Shares, Class B Shares, Class C Shares and Class F Shares, respectively.

Other Service Fees

For the six months ended September 30, 2017, FSSC received $124,125 and reimbursed $68,463 of the other service fees disclosed in Note 2.

Interfund Transactions

During the six months ended September 30, 2017, the Fund engaged in purchase and sale transactions with funds that have a common investment adviser (or affiliated investment advisers), common Directors/Trustees and/or common Officers. These purchase and sale transactions complied with Rule 17a-7 under the Act and amounted to $35,650,000 and $35,750,000, respectively.

Expense Limitation

The Adviser and certain of its affiliates (which may include FSC, FAS and FSSC) on their own initiative have agreed to waive certain amounts of their respective fees and/or reimburse expenses. Effective July 27, 2017, total annual fund operating expenses (as shown in the financial highlights, excluding interest expense, extraordinary expenses, line of credit expenses and proxy-related expenses paid by the Fund, if any) paid by the Fund's Class A Shares, Class B Shares, Class C Shares, Class F Shares and Institutional Shares (after the voluntary waivers and reimbursements) will not exceed 0.83%, 1.58%, 1.58%, 0.83% and 0.58% (the “Fee Limit”), respectively, up to but not including the later of (the “Termination Date”): (a) August 1, 2018; or (b) the date of the Fund's next effective Prospectus. While the Adviser and its applicable affiliates currently do not anticipate terminating or increasing these arrangements prior to the Termination Date, these arrangements may only be terminated or the Fee Limit increased prior to the Termination Date with the agreement of the Directors.

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General

Certain Officers and Directors of the Fund are Officers and Directors or Trustees of certain of the above companies. To efficiently facilitate payment, Directors'/Trustees' fees and certain expenses related to conducting meetings of the Directors/Trustees and other miscellaneous expenses are paid by an affiliate of the Adviser which in due course are reimbursed by the Fund. These expenses relate to conducting meetings of the Directors/Trustees and other miscellaneous expenses may be included in Accrued and Miscellaneous Expenses on the Statement of Assets and Liabilities and Statement of Operations, respectively.

6. Investment TRANSACTIONS

Purchases and sales of investments, excluding long-term U.S. government securities and short-term obligations, for the six months ended September 30, 2017, were as follows:

Purchases	$34,985,631
Sales	$45,632,247

7. LINE OF CREDIT

The Fund participates with certain other Federated Funds, on a several basis, in an up to $500,000,000 unsecured, 364-day, committed, revolving line of credit (LOC) agreement. The LOC was made available to finance temporarily the repurchase or redemption of shares of the Fund, failed trades, payment of dividends, settlement of trades and for other short-term, temporary or emergency general business purposes. The Fund cannot borrow under the LOC if an inter-fund loan is outstanding. The Fund's ability to borrow under the LOC also is subject to the limitations of the Act and various conditions precedent that must be satisfied before the Fund can borrow. Loans under the LOC are charged interest at a fluctuating rate per annum equal to the highest, on any day, of (a) (i) the federal funds effective rate, (ii) the one month London Interbank Offered Rate (LIBOR), and (iii) 0.0%, plus (b) a margin. The LOC also requires the Fund to pay, quarterly in arrears and at maturity, its pro rata share of a commitment fee based on the amount of the lenders' commitment that has not been utilized. As of September 30, 2017, the Fund had no outstanding loans. During the six months ended September 30, 2017, the Fund did not utilize the LOC.

8. INTERFUND LENDING

Pursuant to an Exemptive Order issued by the SEC, the Fund, along with other funds advised by subsidiaries of Federated Investors, Inc., may participate in an interfund lending program. This program provides an alternative credit facility allowing the Fund to borrow from other participating affiliated funds. As of September 30, 2017, there were no outstanding loans. During the six months ended September 30, 2017, the program was not utilized.

9. SUBSEQUENT EVENT

On August 18, 2017, the Directors approved an Agreement and Plan of Reorganization pursuant to which the Fund would acquire all or substantially all of the assets of Federated New York Municipal Income Fund, a portfolio of Federated Municipal Securities Income Trust, in complete liquidation and termination of Federated New York Municipal Income Fund. The reorganization, subject to shareholder approval, is expected to be completed during the fourth quarter of 2017.

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Shareholder Expense Example (unaudited)

As a shareholder of the Fund, you incur two types of costs: (1) transaction costs, including sales charges (loads) on purchase or redemption payments; and (2) ongoing costs, including management fees and to the extent applicable, distribution (12b-1) fees and/or other service fees and other Fund expenses. This Example is intended to help you to understand your ongoing costs (in dollars) of investing in the Fund and to compare these costs with the ongoing costs of investing in other mutual funds. It is based on an investment of $1,000 invested at the beginning of the period and held for the entire period from April 1, 2017 to September 30, 2017.

ACTUAL EXPENSES

The first section of the table below provides information about actual account values and actual expenses. You may use the information in this section, together with the amount you invested, to estimate the expenses that you incurred over the period. Simply divide your account value by $1,000 (for example, an $8,600 account value divided by $1,000 = 8.6), then multiply the result by the number in the first section under the heading entitled “Expenses Paid During Period” to estimate the expenses attributable to your investment during this period.

HYPOTHETICAL EXAMPLE FOR COMPARISON PURPOSES

The second section of the table below provides information about hypothetical account values and hypothetical expenses based on the Fund's actual expense ratio and an assumed rate of return of 5% per year before expenses, which is not the Fund's actual return. Thus, you should not use the hypothetical account values and expenses to estimate the actual ending account balance or your expenses for the period. Rather, these figures are required to be provided to enable you to compare the ongoing costs of investing in the Fund with other funds. To do so, compare this 5% hypothetical example with the 5% hypothetical examples that appear in the shareholder reports of the other funds.

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Please note that the expenses shown in the table are meant to highlight your ongoing costs only and do not reflect any transaction costs, such as sales charges (loads) on purchase or redemption payments. Therefore, the second section of the table is useful in comparing ongoing costs only, and will not help you determine the relative total costs of owning different funds. In addition, if these transaction costs were included, your costs would have been higher.

	Beginning Account Value 4/1/2017	Ending Account Value 9/30/2017	Expenses Paid During Period1
Actual:
Class A Shares	$1,000	$1,028.40	$4.37
Class B Shares	$1,000	$1,025.20	$8.43
Class C Shares	$1,000	$1,024.20	$8.42
Class F Shares	$1,000	$1,029.40	$4.38
Institutional Shares	$1,000	$1,026.00	$1.082
Hypothetical (assuming a 5% return before expenses):
Class A Shares	$1,000	$1,020.76	$4.36
Class B Shares	$1,000	$1,016.75	$8.39
Class C Shares	$1,000	$1,016.75	$8.39
Class F Shares	$1,000	$1,020.76	$4.36
Institutional Shares	$1,000	$1,007.97	$1.072

1 Expenses are equal to the Fund's annualized net expense ratios, multiplied by the average account value over the period, multiplied by 183/365 (to reflect the one-half-year period). The annualized net expense ratios are as follows:

Class A Shares	0.86%
Class B Shares	1.66%
Class C Shares	1.66%
Class F Shares	0.86%
Institutional Shares	0.59%

2 “Actual” expense information for the Fund's Institutional Shares is for the period from July 27, 2017 (date of initial investment) to September 30, 2017. Actual expenses are equal to the Fund's annualized net expense ratio of 0.59%, multiplied by 66/365 (to reflect the period from initial investment to September 30, 2017). “Hypothetical” expense information for Institutional Shares is presented on the basis of the full one-half year period to enable comparison to other funds. It is based on assuming the same net expense ratio and average account value over the period, but it is multiplied by 183/365 (to reflect the full half-year period).

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Evaluation and Approval of Advisory Contract–May 2017

Federated Municipal Securities Fund, Inc. (the “Fund”)

Following a review and recommendation of approval by the Fund's independent directors, the Fund's Board of Directors (the “Board”) reviewed and unanimously approved the continuation of the Fund's investment advisory contract for an additional one-year term at its May 2017 meetings. The Board's decision regarding the contract reflects the exercise of its business judgment after considering all of the information received on whether to continue the existing arrangements.

The Board had previously appointed a Senior Officer, whose duties include specified responsibilities relating to the process by which advisory fees are to be charged to a Federated fund. The Senior Officer has the authority to retain consultants, experts, or staff as may be reasonably necessary to assist in the performance of his duties, reports directly to the Board, and may be terminated only with the approval of a majority of the independent members of the Board. The Senior Officer prepared and furnished to the Board an independent, written evaluation that covered topics discussed below (the “Senior Officer's Evaluation”). The Board considered the Senior Officer's Evaluation, along with other information, in deciding to approve the investment advisory contract.

The Board also considered judicial decisions concerning allegedly excessive investment advisory fees in its decision. Using these judicial decisions as a guide, the Board has indicated that the following factors may be relevant to an adviser's fiduciary duty with respect to its receipt of compensation from a fund: (1) the nature and quality of the services provided by an adviser to a fund and its shareholders (including the performance of the Fund and of comparable funds); (2) an adviser's cost of providing the services (including the profitability to an adviser of providing advisory services to a fund); (3) the extent to which an adviser may realize “economies of scale” as a fund grows larger and, if such economies of scale exist, whether they have been shared with a fund and its shareholders or the family of funds; (4) any “fall-out financial benefits” that accrue to an adviser because of its relationship with a fund (including research services received from brokers that execute fund trades and any fees paid to affiliates of an adviser for services rendered to a fund); (5) comparative fee and expense structures (including a comparison of fees paid to an adviser with those paid by similar funds); and (6) the extent of care, conscientiousness and independence with which the Fund's board members perform their duties and their expertise (including whether they are fully informed about all facts the Board deems relevant to its consideration of an adviser's services and fees). The Board noted that the Securities and Exchange Commission (“SEC”) disclosure requirements regarding the basis for the Board's approval of the Fund's investment advisory contract generally align with the factors listed above. Consistent with the judicial decisions and SEC disclosure requirements, the

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Board also considered management fees charged to institutional and other clients of Federated Investment Management Company (the “Adviser”) and its advisory affiliates for what might be viewed as like services. The Board was aware of these factors and was guided by them in its review of the Fund's investment advisory contract to the extent it considered them to be appropriate and relevant, as discussed further below.

The Board considered and weighed these factors in light of its substantial accumulated experience in governing the Fund and working with Federated Investors, Inc. and its affiliates (“Federated”) on matters relating to the Federated funds. The Board was assisted in its deliberations by independent legal counsel. In addition to the extensive materials that comprise and accompany the Senior Officer's Evaluation, the Board received detailed information about the Fund and the Federated organization throughout the year, and in connection with its May meetings. Federated provided much of this information at each regular meeting of the Board, and furnished additional information in connection with the May meetings at which the Board's formal approval of the investment advisory contract occurred. At the May meetings in addition to meeting in separate sessions of the independent directors without management present, senior management of the Adviser also met with the independent directors and their counsel to discuss the materials presented and any other matters thought relevant by the Adviser or the directors. Between regularly scheduled meetings, the Board also received information on particular matters as the need arose. The Board's consideration of the investment advisory contract included review of the Senior Officer's Evaluation, accompanying data and additional information covering such matters as: the Adviser's investment philosophy, revenue, profitability, personnel and processes; investment and operating strategies; the Fund's short-term and long-term performance (in absolute terms, both on a gross basis and net of expenses, as well as in terms relative to its particular investment program and certain competitor or “peer group” funds and/or other benchmarks, as appropriate) and comments on the reasons for performance; the Fund's investment objectives; the Fund's expenses, including the advisory fee and the overall expense structure of the Fund (both in absolute terms and relative to similar and/or competing funds), with due regard for contractual or voluntary expense limitations; the use and allocation of brokerage commissions derived from trading the Fund's portfolio securities (if any); and the nature, quality and extent of the advisory and other services provided to the Fund by the Adviser and its affiliates. The Board also considered the preferences and expectations of Fund shareholders; the entrepreneurial risk assumed by the Adviser in sponsoring the Fund; the continuing state of competition in the mutual fund industry and market practices; the range of comparable fees for similar funds in the mutual fund industry; the Fund's relationship to the Federated funds which include a comprehensive array of funds with different investment objectives, policies and strategies which are generally available for exchange without the incurrence of additional sales charges; compliance and

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audit reports concerning the Federated funds and the Federated companies that service them (including communications from regulatory agencies), as well as Federated's responses to any issues raised therein; and relevant developments in the mutual fund industry and how the Federated funds and/or Federated are responding to them. The Board's evaluation process is evolutionary. The criteria considered and the emphasis placed on relevant criteria change in recognition of changing circumstances in the mutual fund marketplace.

While mindful that courts have cautioned against giving such comparisons too much weight, the Board has found the use of comparisons of the Fund's fees and expenses to other mutual funds with comparable investment programs to be relevant to its deliberations. In this regard, the Board was presented with, and considered, information regarding the contractual advisory fee rates, net advisory fee rates, total expense ratios and each element of the Fund's total expense ratio (i.e., gross and net advisory fees, custody fees, portfolio accounting fees and transfer agency fees) relative to the Fund's peers. The Board focused on comparisons with other similar mutual funds more heavily than non-mutual fund products or services because it is believed that they are more relevant. For example, other mutual funds are the products most like the Fund, in that they are readily available to Fund shareholders as alternative investment vehicles. Also, they are the type of investment vehicle, in fact, chosen and maintained by the Fund's investors. The range of their fees and expenses, therefore, appears to be a relevant indicator of what consumers have found to be reasonable in the marketplace in which the Fund competes.

The Board reviewed the contractual advisory fee rate and other expenses of the Fund and noted the position of the Fund's fee rates relative to its peers. In this regard, the Board noted that the contractual advisory fee rate was above the median of the relevant peer group, but the Board noted the applicable waivers and reimbursements, and that the overall expense structure of the Fund remained competitive in the context of other factors considered by the Board.

For comparison, the Senior Officer has reviewed Federated's fees for providing advisory services to products outside the Federated funds (e.g., institutional and separate accounts and sub-adviser services). He concluded that mutual funds and institutional accounts are inherently different products. Those differences include, but are not limited to, different types of targeted investors; being subject to different laws and regulations; different legal structures; different average account sizes and portfolio management techniques made necessary by different cash flows and different associated costs; and the time spent by portfolio managers and their teams, funds financial services, legal, compliance and risk management in reviewing securities pricing, addressing different administrative responsibilities, addressing different degrees of risk associated with management and a variety of different costs. The Senior Officer did not consider the fees for providing advisory services to these outside products to be determinative in judging the appropriateness of mutual fund advisory fees.

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Following such evaluation, and full deliberations, the Board concluded that the expenses of the Fund are reasonable and supported renewal of the Fund's investment advisory contract.

The Board considered the nature, extent and quality of the services provided to the Fund by the Adviser and the resources of the Adviser and its affiliates dedicated to the Fund. In this regard, the Board evaluated, among other things, the Adviser's personnel, experience, track record, overall reputation and willingness to invest in personnel and infrastructure that benefit the Fund. In addition, the Board reviewed the qualifications, backgrounds and responsibilities of the portfolio management team primarily responsible for the day-to-day management of the Fund. The Board noted the compliance programs of, and the compliance-related resources provided to, the Fund by the Adviser. The Fund's ability to deliver competitive performance when compared to its peer group was also deemed to be relevant by the Board as a useful indicator of how the Adviser is executing the Fund's investment program. The Adviser's ability to execute this program was one of the Board's considerations in reaching a conclusion that the nature, extent and quality of the Adviser's investment management services warrant the continuation of the investment advisory contract.

In evaluating the Fund's investment performance, the Board considered performance results in light of the Fund's investment objective, strategies and risks, as disclosed in the Fund's prospectus. The Board particularly considered detailed investment reports on the Fund's performance that were provided to the Board throughout the year and in connection with the May meetings. The Senior Officer also reviewed information compiled by Federated, using data supplied by independent fund ranking organizations, regarding the performance of, and fees charged by, other mutual funds, noting his view that comparisons to fund peer groups may be helpful, though not conclusive, in judging the reasonableness of the proposed fees. The Board considered, in evaluating such comparisons, that in some cases individual funds may exhibit significant and unique differences in their objectives and management techniques when compared to other funds within an industry peer group.

For the periods covered by the Senior Officer's Evaluation, the Fund's performance for the one-year period was above the median of the relevant peer group, and the Fund's performance fell below the median of the relevant peer group for the three-year and five-year periods. The Board discussed the Fund's performance with the Adviser and recognized the efforts being taken by the Adviser in the context of other factors considered relevant by the Board, including a contemplated repositioning of the Fund's investment strategy.

Following such evaluation, and full deliberations, the Board concluded that the performance of the Fund supported renewal of the Fund's investment advisory contract.

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The Board also received financial information about Federated, including information regarding the compensation and ancillary (or “fall-out”) benefits Federated derived from its relationships with the Federated funds. This information covered not only the fees under the investment advisory contracts, but also fees received by Federated's subsidiaries for providing other services to the Federated funds under separate contracts (e.g., for serving as the Federated funds' administrator). The information also detailed any indirect benefit Federated may derive from its receipt of research services from brokers who execute Federated fund trades. In addition, the Board considered the fact that, in order for a fund to be competitive in the marketplace, Federated and its affiliates frequently waived fees and/or reimbursed expenses and have disclosed to Fund investors and/or indicated to the Board their intention to do so in the future. Moreover, the Board receives regular reporting as to the institution, adjustment or elimination of these voluntary waivers. The Board considered Federated's previous reductions in contractual management fees to certain funds in response to the Senior Officer's recommendations.

Federated furnished information, requested by the Senior Officer, that reported revenues on a fund-by-fund basis and made estimates of the allocation of expenses on a fund-by-fund basis, using allocation methodologies specified by the Senior Officer. The Senior Officer noted that, while these cost allocation reports apply consistent allocation processes, the inherent difficulties in allocating costs continues to cause the Senior Officer to question the precision of the process and to conclude that such reports may be unreliable, since a single change in an allocation estimate may dramatically alter the resulting estimate of cost and/or profitability of a fund and may produce unintended consequences. The allocation information, including the Senior Officer's view that fund-by-fund estimations may be unreliable, was considered in the analysis by the Board.

The Board and the Senior Officer also reviewed information compiled by Federated comparing its profitability information to other publicly held fund management companies. In this regard, the Senior Officer concluded that Federated's profit margins did not appear to be excessive. The Senior Officer also noted that Federated appeared financially sound, with the resources to fulfill its obligations under its contracts with the Fund.

The Senior Officer's Evaluation also discussed the notion of possible realization of “economies of scale” as a fund grows larger. In this regard, the Board considered that the Adviser has made significant and long-term investments in areas that support all of the Federated funds, such as personnel and processes for the portfolio management, shareholder services, compliance, internal audit and risk management functions, as well as systems technology (including technology relating to cybersecurity) and that the benefits of these efforts (as well as any economies of scale, should they exist) were likely to be enjoyed by the fund family as a whole. The Board noted that the Adviser's investments in these areas are extensive. In addition, the Board considered that Federated and its affiliates have frequently waived fees and/or reimbursed

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expenses and that this has allowed fund shareholders to share potential economies of scale from a fund's inception. Federated, as it does throughout the year, and in connection with the Board's review, furnished information relative to revenue sharing or adviser paid fees. Federated and the Senior Officer noted that this information should be viewed to determine if there was an incentive to either not apply breakpoints, or to apply breakpoints at higher levels. It should not be viewed to determine the appropriateness of advisory fees because it would represent marketing and distribution expenses. Finally, the Board also noted the absence of any applicable regulatory or industry guidelines on this subject, which (as discussed in the Senior Officer's Evaluation) is compounded by the lack of any common industry practice or general pattern with respect to structuring fund advisory fees with “breakpoints” that serve to reduce the fee as a fund attains a certain size.

While the Senior Officer noted certain items for follow-up reporting to the Board and further consideration by management, he stated that his observations and information accompanying the Senior Officer's Evaluation supported a finding by the Board that the management fee for the Fund was reasonable. Under these circumstances, no changes were recommended to, and no objection was raised to the continuation of the Fund's investment advisory contract.

In its decision to continue an existing investment advisory contract, the Board was mindful of the potential disruptions of the Fund's operations and various risks, uncertainties and other effects that could occur as a result of a decision to terminate or not renew an investment advisory contract. In particular, the Board recognized that many shareholders have invested in the Fund on the strength of the Adviser's industry standing and reputation and with the expectation that the Adviser will have a continuing role in providing advisory services to the Fund. Thus, the Board's approval of the investment advisory contract reflected the fact that it is the shareholders who have effectively selected the Adviser by virtue of having invested in the Fund. The Board concluded that, in light of the factors discussed above, including the nature, quality and scope of the services provided to the Fund by the Adviser and its affiliates, continuation of the investment advisory contract was appropriate.

The Board based its decision to approve the investment advisory contract on the totality of the circumstances and relevant factors and with a view to past and future long-term considerations. Not all of the factors and considerations identified above were necessarily relevant to the Fund, nor did the Board consider any one of them to be determinative. With respect to the factors that were relevant, the Board's decision to approve the continuation of the contract reflects its determination that Federated's performance and actions provided a satisfactory basis to support the decision to continue the existing arrangement.

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Voting Proxies on Fund Portfolio Securities

A description of the policies and procedures that the Fund uses to determine how to vote proxies, if any, relating to securities held in the Fund's portfolio is available, without charge and upon request, by calling 1-800-341-7400. A report on “Form N-PX” of how the Fund voted any such proxies during the most recent 12-month period ended June 30 is available via the Proxy Voting Record (Form N-PX) link associated with the Fund and share class name at www.FederatedInvestors.com/FundInformation. Form N-PX filings are also available at the SEC's website at www.sec.gov.

Quarterly Portfolio Schedule

The Fund files with the SEC a complete schedule of its portfolio holdings, as of the close of the first and third quarters of its fiscal year, on “Form N-Q.” These filings are available on the SEC's website at www.sec.gov and may be reviewed and copied at the SEC's Public Reference Room in Washington, DC. (Call 1-800-SEC-0330 for information on the operation of the Public Reference Room.) You may also access this information via the link to the Fund and share class name at www.FederatedInvestors.com/FundInformation.

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Mutual funds are not bank deposits or obligations, are not guaranteed by any bank and are not insured or guaranteed by the U.S. government, the Federal Deposit Insurance Corporation, the Federal Reserve Board or any other government agency. Investment in mutual funds involves investment risk, including the possible loss of principal.

This Report is authorized for distribution to prospective investors only when preceded or accompanied by the Fund's Prospectus, which contains facts concerning its objective and policies, management fees, expenses and other information.

IMPORTANT NOTICE ABOUT FUND DOCUMENT DELIVERY    

In an effort to reduce costs and avoid duplicate mailings, the Fund(s) intend to deliver a single copy of certain documents to each household in which more than one shareholder of the Fund(s) resides (so-called “householding”), as permitted by applicable rules. The Fund's “householding” program covers its/their Prospectus and Statement of Additional Information, and supplements to each, as well as Semi-Annual and Annual Shareholder Reports and any Proxies or information statements. Shareholders must give their written consent to participate in the “householding” program. The Fund is also permitted to treat a shareholder as having given consent (“implied consent”) if (i) shareholders with the same last name, or believed to be members of the same family, reside at the same street address or receive mail at the same post office box, (ii) the Fund gives notice of its intent to “household” at least sixty (60) days before it begins “householding” and (iii) none of the shareholders in the household have notified the Fund(s) or their agent of the desire to “opt out” of “householding.” Shareholders who have granted written consent, or have been deemed to have granted implied consent, can revoke that consent and opt out of “householding” at any time: shareholders who purchased shares through an intermediary should contact their representative; other shareholders may call the Fund at 1-800-341-7400.

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Federated Municipal Bond Fund, Inc.

Federated Investors Funds
4000 Ericsson Drive
Warrendale, PA 15086-7561

Contact us at FederatedInvestors.com
or call 1-800-341-7400.

Federated Securities Corp., Distributor

CUSIP 313913105
CUSIP 313913204
CUSIP 313913303
CUSIP 313913402
CUSIP 313913600

8110104 (11/17)

Federated is a registered trademark of Federated Investors, Inc.
2017 ©Federated Investors, Inc.

Item 2. Code of Ethics

Not Applicable

Item 3. Audit Committee Financial Expert

Not Applicable

Item 4. Principal Accountant Fees and Services

Not Applicable

Item 5. Audit Committee of Listed Registrants

Not Applicable

Item 6. Schedule of Investments

(a) The registrant’s Schedule of Investments is included as part of the Report to Stockholders filed under Item 1 of this form.

(b) Not Applicable; Fund had no divestments during the reporting period covered since the previous Form N-CSR filing.

Item 7. Disclosure of Proxy Voting Policies and Procedures for Closed-End Management Investment Companies

Not Applicable

Item 8. Portfolio Managers of Closed-End Management Investment Companies

Not Applicable

Item 9. Purchases of Equity Securities by Closed-End Management Investment Company and Affiliated Purchasers

Not Applicable

Item 10. Submission of Matters to a Vote of Security Holders

No Changes to Report

Item 11. Controls and Procedures

(a) The registrant’s President and Treasurer have concluded that the

registrant’s disclosure controls and procedures (as defined in rule 30a-3(c) under the Act) are effective in design and operation and are sufficient to form the basis of the certifications required by Rule 30a-(2) under the Act, based on their evaluation of these disclosure controls and procedures within 90 days of the filing date of this report on Form N-CSR.

(b) There were no changes in the registrant’s internal control over financial reporting (as defined in rule 30a-3(d) under the Act) during the second fiscal quarter of the period covered by this report that have materially affected, or are reasonably likely to materially affect, the registrant’s internal control over financial reporting.

Item 12. Exhibits

(a)(1) Code of Ethics- Not Applicable to this Report.

(a)(2) Certifications of Principal Executive Officer and Principal Financial Officer.

(a)(3) Not Applicable.

(b) Certifications pursuant to 18 U.S.C. Section 1350.

SIGNATURES

Pursuant to the requirements of the Securities Exchange Act of 1934 and the Investment Company Act of 1940, the registrant has duly caused this report to be signed on its behalf by the undersigned, thereunto duly authorized.

Registrant Federated Municipal Bond Fund, Inc.

By /S/ Lori A. Hensler

Lori A. Hensler, Principal Financial Officer

Date November 21, 2017

Pursuant to the requirements of the Securities Exchange Act of 1934 and the Investment Company Act of 1940, this report has been signed below by the following persons on behalf of the registrant and in the capacities and on the dates indicated.

By /S/ J. Christopher Donahue

J. Christopher Donahue, Principal Executive Officer

Date November 21, 2017

By /S/ Lori A. Hensler

Lori A. Hensler, Principal Financial Officer

Date November 21, 2017

EX-99.CERT302

N-CSR Item 12(a)(2) - Exhibits: Certifications

I, J. Christopher Donahue, certify that:

1. I have reviewed this report on Form N-CSR of Federated Municipal Bond Fund, Inc. ("registrant");

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 statements, and other financial information included in this report, 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-3(c) under the Investment Company Act of 1940) and internal control over financial reporting (as defined in Rule 30a-3(d) under the Investment Company Act of 1940) for the registrant and have:

1. designed such disclosure controls and procedures, or caused such disclosure controls and procedures to be designed under our supervision, to ensure that material information relating 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;

2. Designed such internal control over financial reporting, or caused such internal control over financial reporting to be designed under our supervision, to provide reasonable assurance regarding the reliability of financial reporting and the preparation of financial statements for external purposes in accordance with generally accepted accounting principles;

3. evaluated the effectiveness of the registrant's disclosure controls and procedures and presented in this report our conclusions about the effectiveness of the disclosure controls and procedures, as of a date within 90 days prior to the filing date of this report based on such evaluation; and

4. disclosed in this report any change in the registrant’s internal control over financial reporting that occurred during the second fiscal quarter of the period covered by this report that has materially affected, or is reasonably likely to materially affect, the registrant’s internal control over financial reporting; and

5. The registrant's other certifying officers and I have disclosed to the registrant's auditors and the audit committee of the registrant's board of directors (or persons performing the equivalent functions):

1. all significant deficiencies and material weaknesses in the design or operation of internal control over financial reporting which are reasonably likely to adversely affect the registrant’s ability to record, process, summarize, and report financial information; and

2. any fraud, whether or not material, that involves management or other employees who have a significant role in the registrant’s internal control over financial reporting.

Date: November 21, 2017

/S/ J. Christopher Donahue

J. Christopher Donahue, President - Principal Executive Officer

N-CSR Item 12(a)(2) - Exhibits: Certifications

I, Lori A. Hensler, certify that:

1. I have reviewed this report on Form N-CSR of Federated Municipal Bond Fund, Inc. ("registrant");

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 statements, and other financial information included in this report, 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-3(c) under the Investment Company Act of 1940) and internal control over financial reporting (as defined in Rule 30a-3(d) under the Investment Company Act of 1940) for the registrant and have:

1. designed such disclosure controls and procedures, or caused such disclosure controls and procedures to be designed under our supervision, to ensure that material information relating 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;

2. Designed such internal control over financial reporting, or caused such internal control over financial reporting to be designed under our supervision, to provide reasonable assurance regarding the reliability of financial reporting and the preparation of financial statements for external purposes in accordance with generally accepted accounting principles;

3. evaluated the effectiveness of the registrant's disclosure controls and procedures and presented in this report our conclusions about the effectiveness of the disclosure controls and procedures, as of a date within 90 days prior to the filing date of this report based on such evaluation; and

4. disclosed in this report any change in the registrant’s internal control over financial reporting that occurred during the second fiscal quarter of the period covered by this report that has materially affected, or is reasonably likely to materially affect, the registrant’s internal control over financial reporting; and

5. The registrant's other certifying officers and I have disclosed to the registrant's auditors and the audit committee of the registrant's board of directors (or persons performing the equivalent functions):

1. all significant deficiencies and material weaknesses in the design or operation of internal control over financial reporting which are reasonably likely to adversely affect the registrant’s ability to record, process, summarize, and report financial information; and

2. any fraud, whether or not material, that involves management or other employees who have a significant role in the registrant’s internal control over financial reporting.

Date: November 21, 2017

/S/ Lori A. Hensler

Lori A. Hensler, Treasurer - Principal Financial Officer

EX-99.CERT906

N-CSR Item 12(b) - Exhibits: Certifications

SECTION 906 CERTIFICATION

Pursuant to 18 U.S.C.§ 1350, the undersigned officers of Federated Municipal Bond Fund, Inc.(the “Registrant”), hereby certify, to the best of our knowledge, that the Registrant’s Report on Form N-CSR for the period ended September 30, 2017 (the “Report”) fully complies with the requirements of Section 13(a) or 15(d), as applicable, of the Securities and Exchange Act of 1934 and that the information contained in the Report fairly presents, in all material respects, the financial condition and results of operations of the Registrant.

Dated: November 21, 2017

/s/ J. Christopher Donahue

J. Christopher Donahue

Title: President, Principal Executive Officer

Dated: November 21, 2017

/s/ Lori A. Hensler

Lori A. Hensler

Title: Treasurer, Principal Financial Officer

This certification is being furnished solely pursuant to 18 U.S.C.§ 1350 and is not being filed as part of the Report or as a separate disclosure document.