gug51485gbab-nq.htm
UNITED STATES
 
SECURITIES AND EXCHANGE COMMISSION
 
Washington, DC  20549

FORM N-Q

QUARTERLY SCHEDULE OF PORTFOLIO HOLDINGS OF REGISTERED
MANAGEMENT INVESTMENT COMPANY

Investment Company Act file number
811-22437
 
Guggenheim Build America Bonds Managed Duration Trust
(Exact name of registrant as specified in charter)
 
2455 Corporate West Drive Lisle, IL 60532
  (Address of principal executive offices) (Zip code)
 
Kevin M. Robinson
 
2455 Corporate West Drive Lisle, IL 60532
(Name and address of agent for service)

Registrant’s telephone number, including area code: (630) 505-3700

Date of fiscal year end: May 31
Date of reporting period: December 1, 2010 – February 28, 2011

Form N-Q is to be used by management investment companies, other than small business investment companies registered on Form N-5 (§§ 239.24 and 274.5 of this chapter), to file reports with the Commission, not later than 60 days after the close of the first and third fiscal quarters, pursuant to rule 30b1-5 under the Investment Company Act of 1940 (17 CFR 270.30b1-5).  The Commission may use the information provided on Form N-Q in its regulatory, disclosure review, inspection, and policymaking roles.

A registrant is required to disclose the information specified by Form N-Q, and the Commission will make this information public.  A registrant is not required to respond to the collection of information contained in Form N-Q unless the Form displays a currently valid Office of Management and Budget (“OMB”) control number.  Please direct comments concerning the accuracy of the information collection burden estimate and any suggestions for reducing the burden to the Secretary, Securities and Exchange Commission, 100 F Street, NE, Washington, DC 20549-1090.  The OMB has reviewed this collection of information under the clearance requirements of 44 U.S.C. § 3507.
 
 
 

 
 
Item 1.    Schedule of Investments.
Attached hereto.
 
GBAB Guggenheim Build America Bonds Managed Duration Trust
Portfolio of Investments
February 28, 2011 (unaudited)
 
                 
Optional
   
Principal       Rating         Call    
Amount
 
Description
 
(S&P)*
Coupon
 
Maturity
 
 Provisions**
 
Value
   
Long-Term Investments - 114.4%
                 
   
Municipal Bonds - 100.5%
                 
   
Alabama - 3.0%
                 
$3,000,000
 
Alabama State University, General Tuition and Fee Revenue Bonds, Taxable Direct-Pay Build America Bonds(a)
 
AA+
7.10%
 
09/01/2035
 
09/01/20 @ 100
 
$3,097,290
5,000,000
 
Alabama State University, General Tuition and Fee Revenue Bonds, Taxable Direct-Pay Build America Bonds(a) (f)
 
AA+
7.20%
 
09/01/2038
 
09/01/20 @ 100
 
5,186,300
2,000,000
 
Alabama State University, General Tuition and Fee Revenue Bonds, Taxable Direct-Pay Build America Bonds(a)
 
AA+
7.25%
 
09/01/2040
 
09/01/20 @ 100
 
2,065,840
                     
10,349,430
                       
   
California - 16.4%
                 
500,000
 
Alhambra Unified School District, Elementary Schools Improvement District, Los Angeles County, California, Election of 2008 General Obligation Bonds, Federally Taxable, Series B-1(a)
 
A+
6.70%
 
02/01/2026
 
N/A
 
514,020
10,000,000
 
California, General Obligation Bonds, Various Purpose, Taxable Build America Bonds(a)
 
A-
7.70%
 
11/01/2030
 
11/01/20 @ 100
 
10,374,600
10,000,000
 
Los Angeles, California, Department of Water & Power Revenue, Taxable Build America Bonds(a)
 
AA-
7.00%
 
07/01/2041
 
07/01/21 @ 100
 
10,209,800
10,000,000
 
Los Angeles, California, Department of Water & Power Revenue, Taxable Build America Bonds(a)
 
AA
7.00%
 
07/01/2041
 
07/01/20 @ 100
 
10,099,700
5,000,000
 
Metropolitan Water District, Southern California, Water Revenue Bonds, 2010 Authorization, Series A, Taxable Build America Bonds(a)
 
AAA
6.95%
 
07/01/2040
 
07/01/20 @ 100
 
5,230,750
1,025,000
 
Monrovia Unified School District, Los Angeles County, California, Election of 2006 General Obligation Bonds, Build America Bonds, Federally Taxable, Series C-1(a)
 
A+
7.25%
 
08/01/2028
 
N/A
 
1,019,875
5,000,000
 
Riverside Community College District, Riverside County, California, Election of 2004 General Obligation Bonds, Series 2010 D-1, Taxable Build America Bonds(a) (f)
 
AA
7.02%
 
08/01/2040
 
08/01/20 @ 100
 
4,946,050
2,245,000
 
Santa Ana Unified School District, California, General Obligation Bonds, Federally, Taxable Build America Bonds(a)
 
Aa2
6.80%
 
08/01/2030
 
N/A
 
2,228,230
7,755,000
 
Santa Ana Unified School District, California, General Obligation Bonds, Federally, Taxable Build America Bonds(a) (f)
 
Aa2
7.10%
 
08/01/2040
 
N/A
 
7,784,779
3,330,000
 
Sonoma Valley Unified School District, General Obligation, Federally Taxable Build America Bonds(a)
 
AA-
7.12%
 
08/01/2028
 
08/01/20 @ 100
 
3,320,776
                     
55,728,580
                       
   
Colorado - 3.1%
                 
2,500,000
 
Colorado, Building Excellent Schools Today, Certificates of Participation, Taxable Qualified School Construction, Series 2010D
 
AA-
6.82%
 
03/15/2028
 
N/A
 
2,639,325
7,500,000
 
Colorado, Building Excellent Schools Today, Certificates of Participation, Taxable Build America Bonds, Series 2010E(a)
 
AA-
7.02%
 
03/15/2031
 
03/15/21 @ 100
 
7,864,950
                     
10,504,275
                       
   
Florida - 4.4%
                 
10,000,000
 
Miami-Dade County, Florida, Transit Sales Surtax Revenue, Taxable Build America Bonds, Series B(a)
 
AA
6.91%
 
07/01/2039
 
07/01/19 @ 100
 
9,782,000
5,000,000
 
Orlando, Florida, Community Redevelopment Agency, Taxable Tax Increment Revenue Build America Bonds, Series 2010B(a) (f)
 
A
7.78%
 
09/01/2040
 
09/01/20 @ 100
 
5,217,750
                     
14,999,750
                       
   
Illinois - 13.0%
                 
5,000,000
 
Chicago, Illinois, Board of Education, Unlimited Tax General Obligation Bonds, Dedicated Revenues, Taxable Build America Bonds, Series 2010D(a)
 
AA-
6.52%
 
12/01/2040
 
N/A
 
4,898,250
5,100,000
 
Chicago, Illinois, Second Lien Wastewater Transmission Revenue Project Bonds, Taxable Build America Bonds, Series 2010B(a) (f)
 
A+
6.90%
 
01/01/2040
 
N/A
 
5,211,690
2,990,000
 
Chicago, Illinois, Second Lien Water Revenue Bonds, Taxable Build America Bonds, Series 2010B(a)
 
AA-
6.74%
 
11/01/2040
 
N/A
 
3,125,866
5,000,000
 
Illinois, General Obligation Bonds, Taxable Build America Bonds, Series 2010-5(a)
 
A+
7.35%
 
07/01/2035
 
N/A
 
5,155,450
7,140,000
 
Northern Illinois Municipal Power Agency, Power Project Taxable Revenue Bonds, Prairie State Project Build America Bonds(a)
 
A2
7.62%
 
01/01/2030
 
N/A
 
7,583,894
2,860,000
 
Northern Illinois Municipal Power Agency, Power Project Taxable Revenue Bonds, Prairie State Project Build America Bonds(a)
 
A2
7.82%
 
01/01/2040
 
N/A
 
3,112,395
4,500,000
 
Northern Illinois University, Auxiliary Facilities System Revenue Bonds, Build America Program, Taxable, Series 2010(a)
 
Aa3
7.95%
 
04/01/2035
 
04/01/20 @ 100
 
4,812,210
5,000,000
 
Northern Illinois University, Auxiliary Facilities System Revenue Bonds, Build America Program, Taxable, Series 2010(a)
 
Aa3
8.15%
 
04/01/2041
 
04/01/20 @ 100
 
5,309,550
2,000,000
 
Southwestern Illinois, Development Authority, Taxable Local Government, Program Revenue Bonds, Flood Prevention District Project, Build America Bonds, Series 2010-B(a)
 
AA
7.03%
 
04/15/2032
 
04/15/20 @ 100
 
1,950,580
3,000,000
 
Southwestern Illinois, Development Authority, Taxable Local Government, Program Revenue Bonds, Flood Prevention District Council Project, Recovery Zone Economic Development Bonds, Series 2010C(a) (f)
 
AA
7.23%
 
10/15/2035
 
04/15/20 @ 100
 
3,022,500
                     
44,182,385
                       
   
Indiana - 5.5%
                 
8,690,000
 
Evansville-Vanderburgh Independent School Building Corporation, Unlimited Taxable Ad Valorem Property Tax First Mortgage Bonds, Series 2010E(a)
 
AA+
6.50%
 
01/15/2030
 
07/15/20 @ 100
 
8,624,477
10,000,000
 
Noblesville Multi-School Building Corporation, Hamilton County, Indiana, Taxable Unlimited Ad Valorem Property Tax First Mortgage Bonds, Build America Bonds, Series 2010(a)
 
AA+
6.50%
 
07/15/2030
 
01/15/21 @ 100
 
10,083,200
                     
18,707,677
                       
   
Louisiana - 0.3%
                 
1,055,000
 
Tangipahoa Parish Hospital Service District No. 1, Louisiana, Taxable Hospital Revenue Bonds, North Oaks Health System Project, Build America Bonds, Series 2009A(a)
 
AA+
7.20%
 
02/01/2042
 
02/01/20 @ 100
 
1,057,965
                       
   
Michigan - 3.8%
                 
1,640,000
 
Detroit, Michigan, School District, School Building and Site Bonds, Unlimited Tax General Obligation Bonds, Taxable Qualified School Construction Bonds, Series 2010A
 
AA-
6.65%
 
05/01/2029
 
N/A
 
1,595,228
690,000
 
Detroit, Michigan, School District, Build America Bonds(a)
 
AA-
7.75%
 
05/01/2039
 
N/A
 
745,669
5,000,000
 
Detroit, Michigan, School District, School Building and Site Bonds, Unlimited Tax General Obligation Bonds, Taxable Build America Bonds, Series 2010B(a) (f)
 
AA-
6.85%
 
05/01/2040
 
05/01/20 @ 100
 
5,026,450
1,000,000
 
Oakridge, Michigan, Public Schools, Unlimited Tax General Obligation Bonds
 
AA-
6.75%
 
05/01/2026
 
05/01/20 @ 100
 
998,880
2,500,000
 
Whitehall District Schools, Muskegon County, Michigan, 2010 School Building and Site Bonds, General Obligation, Unlimited Tax Bonds, Taxable Qualified School Construction Bonds, Series A
 
AA-
6.10%
 
05/01/2026
 
05/01/20 @ 100
 
2,448,875
2,000,000
 
Whitehall District Schools, Muskegon County, Michigan, 2010 School Building and Site Bonds, General Obligation, Unlimited Tax Bonds, Taxable Qualified School Construction Bonds, Series A
 
AA-
6.50%
 
05/01/2029
 
05/01/20 @ 100
 
1,968,480
                     
12,783,582
                       
   
Minnesota - 1.0%
                 
1,660,000
 
St. Paul Housing & Redevelopment Authority, Federally Taxable Revenue Bonds, Build America Bonds(a)
 
AA
7.25%
 
02/01/2035
 
02/01/21 @ 100
 
1,682,759
1,540,000
 
St. Paul Housing & Redevelopment Authority, Federally Taxable Revenue Bonds, Build America Bonds(a)
 
AA
7.50%
 
02/01/2040
 
02/01/21 @ 100
 
1,560,851
                     
3,243,610
                       
   
Mississippi - 2.0%
                 
5,000,000
 
Medical Center Educational Building Corporation, Taxable Build America Bonds, University of Mississippi Medical Center Facilities Expansion and Renovation Project, Series 2010A(a) (f)
 
AA-
6.84%
 
06/01/2035
 
06/01/20 @ 100
 
5,022,150
1,000,000
 
Mississippi, Hospital Equipment and Facilities Authority, Taxable Build America Revenue Bonds, Forrest County General Hospital Project, Series 2010(a)
 
A2
7.27%
 
01/01/2032
 
01/01/20 @ 100
 
977,360
905,000
 
Mississippi, Hospital Equipment and Facilities Authority, Taxable Build America Revenue Bonds, Forrest County General Hospital Project, Series 2010(a)
 
A2
7.39%
 
01/01/2040
 
01/01/20 @ 100
 
877,751
                     
6,877,261
                       
   
Nevada - 2.8%
                 
1,425,000
 
Clark County, Nevada, Airport Revenue Bonds, Build America Bonds, Series B(a)
 
AA-
6.88%
 
07/01/2042
 
07/01/19 @ 100
 
1,419,927
1,200,000
 
Las Vegas Valley Water District, Nevada, Limited Tax General Obligation Water Bonds, Taxable Build America Bonds, Series 2009A(a)
 
AA+
7.10%
 
06/01/2039
 
06/01/19 @ 100
 
1,224,852
1,500,000
 
Nevada System of Higher Education University, Revenue Bonds, Build America Bonds(a)
 
AA-
7.60%
 
07/01/2030
 
07/01/20 @ 100
 
1,604,775
5,050,000
 
Nevada System of Higher Education University, Revenue Bonds, Build America Bonds(a)
 
AA-
7.90%
 
07/01/2040
 
07/01/20 @ 100
 
5,463,191
                     
9,712,745
                       
   
New Jersey - 6.2%
                 
8,000,000
 
Camden County Improvement Authority, Camden County, New Jersey, Lease Revenue Bonds, Cooper Medical School of Rowan University Project, Series 2010A(a)
 
A+
7.75%
 
07/01/2034
 
07/01/20 @ 100
 
8,207,920
2,000,000
 
Camden County Improvement Authority, Camden County, New Jersey, Lease Revenue Bonds, Cooper Medical School of Rowan University Project, Series 2010A(a)
 
A+
7.85%
 
07/01/2035
 
07/01/20 @ 100
 
2,061,220
10,000,000
 
New Jersey Turnpike Authority, Turnpike Revenue Bonds, Federally Taxable Issuer Subsidy, Build America Bonds, Series 2010A(a) (f)
 
A+
7.10%
 
01/01/2041
 
N/A
 
10,768,900
                     
21,038,040
                       
   
New York - 6.0%
                 
5,000,000
 
Metropolitan Transportation Authority, New York, Transportation Revenue Bonds, Taxable Build America Bonds, Series 2010E(a)
 
A
7.13%
 
11/15/2030
 
11/15/20 @ 100
 
5,183,350
5,000,000
 
Metropolitan Transportation Authority, New York, Transportation Revenue Bonds, Taxable Build America Bonds, Series 2010B-1(a) (f)
 
A
6.55%
 
11/15/2031
 
N/A
 
5,058,150
10,000,000
 
Westchester County Health Care Corporation, Revenue Bonds, Taxable Build America Bonds, Series 2010(a)
 
BBB
8.57%
 
11/01/2040
 
N/A
 
10,340,900
                     
20,582,400
                       
   
Ohio - 5.4%
                 
5,000,000
 
American Municipal Power, Inc., Combined Hydroelectric Projects Revenue Bonds, New Clean Renewable Energy Bonds, Series 2010C(a)
 
A
7.33%
 
02/15/2028
 
N/A
 
5,161,050
1,950,000
 
Cuyahoga County, Ohio, Hospital Revenue Bonds, The Metrohealth System, Build America Bonds, Taxable Series 2009B(a)
 
A-
8.22%
 
02/15/2040
 
N/A
 
2,040,265
2,500,000
 
Madison Local School District, Richland County, Ohio, School Improvement, Taxable Build America Bonds, Series 2010A(a)
 
AA
6.90%
 
12/01/2034
 
12/01/20 @ 100
 
2,474,100
2,500,000
 
Madison Local School District, Richland County, Ohio, School Improvement, Taxable Build America Bonds, Series 2010A(a)
 
AA
7.15%
 
12/01/2039
 
12/01/20 @ 100
 
2,476,025
2,500,000
 
Madison Local School District, Richland County, Ohio, School Improvement, Taxable Build America Bonds, Series 2010A(a)
 
AA
7.30%
 
12/01/2043
 
12/01/20 @ 100
 
2,475,550
2,500,000
 
Madison Local School District, Richland County, Ohio, School Improvement, Taxable Qualified School Construction Bonds, Series 2010B
 
AA
6.65%
 
12/01/2029
 
12/01/20 @ 100
 
2,460,350
1,230,000
 
Toronto City School District, Ohio, Qualified School Construction BondsGeneral Obligation Bonds
 
AA
7.00%
 
12/01/2028
 
12/01/20 @ 100
 
1,236,347
                     
18,323,687
                       
   
Pennsylvania - 3.8%
                 
4,865,000
 
Lebanon, Pennsylvania, Sewer Revenue Bonds, Taxable Build America Bonds, Series B of 2010(a)
 
A+
7.14%
 
12/15/2035
 
06/15/20 @ 100
 
4,978,646
7,500,000
 
Pittsburgh, Pennsylvania, School District, Taxable Qualified School Construction Bonds, Series D
 
A
6.85%
 
09/01/2029
 
N/A
 
7,947,750
                     
12,926,396
                       
   
South Carolina - 1.4%
                 
5,000,000
 
Horry County, South Carolina, Taxable Airport Revenue Bonds, Recovery Zone Economic Development Bonds, Series 2010B(f)
 
A-
7.33%
 
07/01/2040
 
N/A
 
4,767,700
                       
   
South Dakota - 1.0%
                 
3,490,000
 
Pierre, South Dakota, Taxable Electric Revenue Bonds, Recovery Zone Economic Development Bonds, Series 2010C(f)
 
A2
7.50%
 
12/15/2040
 
12/15/19 @ 100
 
3,508,183
                       
   
Texas - 5.9%
                 
10,000,000
 
Dallas, Texas, Convention Center Hotel Development Corporation, Hotel Revenue Bonds, Taxable Build America Bonds, Series 2009B(a) (f)
 
A+
7.09%
 
01/01/2042
 
N/A
 
9,998,000
10,000,000
 
El Paso, Texas, Combination Tax and Revenue Certification of Obligation, Taxable Build America Bonds, Series 2010B(a)
 
AA
6.70%
 
08/15/2036
 
08/15/20 @ 100
 
10,143,200
                     
20,141,200
                       
   
Vermont - 2.8%
                 
2,155,000
 
Vermont State Colleges, Revenue Bonds, Taxable Build America Bonds, Series 2010B(a)
 
A+
6.10%
 
07/01/2025
 
07/01/20 @ 100
 
2,098,668
7,500,000
 
Vermont State Colleges, Revenue Bonds, Taxable Build America Bonds, Series 2010B(a)
 
A+
7.21%
 
07/01/2040
 
07/01/20 @ 100
 
7,502,025
                     
9,600,693
                       
   
Washington - 9.4%
                 
5,000,000
 
Anacortes, Washington, Utility System Improvement Revenue Bonds, Build America Bonds, Series 2010B(a)
 
AA-
6.48%
 
12/01/2030
 
12/01/20 @ 100
 
4,917,300
2,000,000
 
Auburn, Washington, Utility System Revenue Bonds, Taxable Build America Bonds, Series 2010B(a)
 
AA
6.40%
 
12/01/2030
 
12/01/20 @ 100
 
2,066,000
5,000,000
 
Central Washington University, System Revenue Bonds, 2010, Taxable Build America Bonds, Series B(a)
 
A1
6.50%
 
05/01/2030
 
N/A
 
4,809,200
5,000,000
 
Public Hospital District No. 1, King County, Washington, Valley Medical Center, Hospital Facilities Revenue Bonds, Series 2010B(a)
 
BBB+
8.00%
 
06/15/2040
 
06/15/20 @ 100
 
5,102,250
5,000,000
 
Washington State Convention Center Public Facilities District, Lodging Tax Bonds, Taxable Build America Bonds, Series 2010B(a)
 
A+
6.79%
 
07/01/2040
 
N/A
 
4,928,300
3,325,000
 
Washington State University, Housing and Dining System Revenue Bonds, Taxable Build America Bonds, Series 2010B(a) (f)
 
A+
7.10%
 
04/01/2032
 
N/A
 
3,334,343
6,675,000
 
Washington State University, Housing and Dining System Revenue Bonds, Taxable Build America Bonds, Series 2010B(a) (f)
 
A+
7.40%
 
04/01/2041
 
N/A
 
6,744,420
                     
31,901,813
                       
   
West Virginia - 3.3%
                 
10,000,000
 
State of West Virginia, Higher Education Policy Commission, Revenue Bonds, Federally Taxable Build America Bonds, 2010 Series B(a)
 
A+
7.65%
 
04/01/2040
 
N/A
 
11,322,000
                       
   
Total Municipal Bonds - 100.5%
                 
   
(Cost $336,064,715)
               
342,259,372
                       
   
Corporate Bonds - 4.4%
                 
   
Building Materials - 0.6%
                 
2,000,000
 
Cemex SAB de CV (Mexico)(b)
 
B
9.00%
 
01/11/2018
 
01/11/15 @ 105
 
2,070,000
                       
   
Commercial Services - 0.3%
                 
1,140,000
 
NCO Group, Inc.
 
CCC-
11.88%
 
11/15/2014
 
11/15/11 @ 103
 
1,017,450
                       
   
Distribution & Wholesale - 0.2%
                 
550,000
 
Baker & Taylor, Inc.(b)
 
CCC+
11.50%
 
07/01/2013
 
07/01/11 @ 103
 
536,250
                       
   
Engineering & Construction - 0.2%
                 
1,000,000
 
Alion Science and Technology Corp.
 
CCC
10.25%
 
02/01/2015
 
02/01/12 @ 103
 
807,500
                       
   
Entertainment - 0.5%
                 
1,600,000
 
Diamond Resorts Corp.(b)
 
B-
12.00%
 
08/15/2018
 
08/15/14 @ 106
 
1,716,000
                       
   
Food - 0.6%
                 
2,000,000
 
Bumble Bee Acquisition Corp.(b)
 
B+
9.00%
 
12/15/2017
 
12/15/14 @ 105
 
2,160,000
                       
   
Internet - 1.3%
                 
4,250,000
 
GXS Worldwide, Inc.
 
B
9.75%
 
06/15/2015
 
06/15/12 @ 105
 
4,324,375
                       
   
Mining - 0.1%
                 
400,000
 
Midwest Vanadium Pty Ltd.(b)
 
B-
11.50%
 
02/15/2018
 
02/15/15 @ 106
 
412,000
                       
   
Trucking & Leasing - 0.6%
                 
2,000,000
 
AWAS Aviation Capital Ltd. (Ireland)(b)
 
BBB-
7.00%
 
10/15/2016
 
10/18/13 @ 104
 
2,055,000
                       
   
Total Corporate Bonds - 4.4%
                 
   
(Cost $14,526,300)
               
15,098,575
                       
   
Asset Backed Securities - 5.7%
                 
   
Collateralized Debt Obligation - 2.6%
                 
9,836,479
 
Putnam Structured Product, Series 2003-1A, Class A1LB(b) (c)
 
BB-
0.72%
 
10/15/2038
 
N/A
 
8,376,844
500,000
 
TIAA Real Estate Ltd., Series 2002-1A, Class III(b) (d)
 
BBB+
7.60%
 
05/22/2037
 
N/A
 
495,000
                     
8,871,844
                       
   
Collateralized Loan Obligation - 0.7%
                 
500,000
 
Alm Loan Funding, Series 2010-3A, Class C(b) (c)
 
BBB
4.43%
 
11/20/2020
 
N/A
 
470,855
1,992,806
 
Newstar Trust, Series 2005-1A, Class C(b) (c)
 
B+
1.15%
 
07/25/2018
 
N/A
 
1,738,843
                     
2,209,698
                       
   
Transportation - 1.5%
                 
3,779,273
 
Airplanes Pass-Through Trust, Series 2001-1A, Class A9(c)
 
CCC
0.82%
 
03/15/2019
 
N/A
 
2,702,180
1,913,100
 
UAL Pass-Through Trust Series 2000-1, Series 001B
 
BB+
8.03%
 
7/1/2012
 
N/A
 
1,946,579
702,076
 
Vega Containervessel PLC, Series 2006-1A, Class A(b)
 
Ba3
5.56%
 
02/10/2021
 
N/A
 
617,827
                     
5,266,586
                       
   
Whole Business - 0.9%
                 
1,300,000
 
Adams Outdoor Advertising, LP, Series 2010-1, Class B(b)
 
Ba2
8.84%
 
12/20/2040
 
N/A
 
1,332,500
1,700,000
 
Adams Outdoor Advertising, LP, Series 2010-1, Class C(b)
 
B3
10.76%
 
12/20/2040
 
N/A
 
1,772,250
                     
3,104,750
                       
   
Total Asset Backed Securities - 5.7%
                 
   
(Cost $19,386,064)
               
19,452,878
                       
   
Collateralized Mortgage Obligations - 0.5%
                 
2,000,000
 
GS Mortgage Securities Corp. II, Series 2007-EOP, Class H(b) (c )
 
BBB-
3.58%
 
03/06/2020
 
N/A
 
1,914,581
   
(Cost $1,780,709)
                 
                       
   
Term Loans - 1.7%(e)
                 
   
Oil Field Services - 0.9%
 
NR
10.75%
 
12/22/2016
 
N/A
 
3,081,240
3,000,000
 
Southern Pacific Resource 2nd Lien (Canada)
                 
                       
   
Restaurants - 0.2%
 
NR
9.25%
 
07/06/2014
 
N/A
 
                 645,421
      651,119
 
Center Cut Hospitality TL
                 
                       
   
Technology - 0.6%
 
NR
7.50%
 
01/20/2017
 
N/A
 
2,017,500
2,000,000
 
Flexera Software, Inc.
                 
                       
   
Total Term Loans - 1.7%
               
              5,744,161
   
(Cost $5,515,943)
                 
                       
Number
                   
 
of Shares
 
Description
                Value
   
Preferred Stock - 1.6%
                 
   
Transportation - 1.6%
 
NR
9.50%
 
-
 
N/A
 
5,306,000
200,000
 
Seaspan Corp., Series C
                 
   
(Cost $5,000,000)
                 
                       
   
Total Long-Term Investments - 114.4%
               
389,775,567
   
(Cost $382,273,731)
                 
                       
                       
   
Short-Term Investments - 1.6%
                 
Number
                     
of Shares
 
Description
                Value
   
Money Market - 1.6%
 
N/A
0.19%
 
N/A
 
N/A
 
5,460,147
5,460,147
 
Federated Prime Obligations Fund
                 
   
(Cost $5,460,147)
                 
                       
   
Total Investments - 116.0%
               
395,235,714
   
(Cost $387,733,878)
               
              6,232,430
   
Other Assets in excess of Liabilities - 1.8%
               
-60,821,754
   
Reverse Repurchase Agreements - (17.8%)
               
$         340,646,390
   
Net Assets  - 100.0%
                 
 
LP - Limited Partnership
 
N/A- Not Available
 
PLC - Public Limited Company
SAB de CV - Publicly Traded Company
 
 
*
Ratings shown are per Standard & Poor's, Moody's or Fitch.  Securities classified as NR are not rated. (For securities not rated by Standard & Poor's Rating Group, the rating by Moody's Investor Services, Inc. is provided.  Likewise, for securities not rated by Standard & Poor's Rating Group and Moody's Investor Services, Inc., the rating by Fitch Ratings is provided.)  All ratings are unaudited.  The ratings apply to the credit worthiness of the issuers of the underlying securities and not to the Fund or its shares.
 
**
Date and price of the earliest optional call or put provision. There may be other call provisions at varying prices at later dates.
 
(a)
Taxable municipal bond issued as part of the Build America Bond program.
 
 
(b)
Securities are exempt from registration under Rule 144A of the Securities Act of 1933.  These securities may be resold in transactions exempt from registration, normally to qualified institutional buyers.  At February 28, 2011 these securities amounted to $25,667,950, which represents 7.5% of net assets applicable to common shares.
 
(c)
Floating or variable rate coupon.  The rate shown is as of 02/28/2011.
 
 
(d)
Security is a "Step-up" bond where the coupon increases or steps up at a predetermined date.  The rate shown reflects the rate in effect at the end of the reporting period.
 
(e)
Term loans held by the Fund have a variable interest rate feature which is periodically adjusted based on an underlying interest rate benchmark.  In addition, term loans may include mandatory and/or optional prepayment terms.  As a result, the actual maturity dates of the loan may be different than the amounts disclosed in the portfolios of investments.  Term loans may be considered restricted in that the Fund may be contractually obligated to secure approval from the Agent Bank and/or Borrower prior to the sale or disposition of loan.
 
(f)
All or a portion of this security is held by the counterparty as collateral for open reverse repurchase agreements.
 
     
     
     
 
Country Allocation*
 
 
United States
96.7%
 
Marshall Islands
1.4%
  Canada 0.8%
 
Mexico
0.5%
 
Ireland
0.5%
 
Australia
0.1%
 
*Subject to change daily.  Based on total investments.
 
     
     
 
See previously submitted notes to financial statements for the period ended November 30, 2010.
 
 
 
 
At February 28, 2011, the Trust had the following unfunded loan commitments which
could be extended at the option of the borrower:
 
 
Borrower
Principal
Amount
 
Unrealized
Appreciation
 
Crestwood Bridge Loan
$ 500,000   $ -  
Targus Group International
  1,831,482     4,579  
  $ 2,331,482   $ 4,579  
             
 
 
 

 
 
At February 28, 2011 (unaudited), the cost and related gross unrealized appreciation and depreciation on
investments for tax purposes are as follows:
     
Cost of Investments for
Tax Purposes
Gross Tax
Unrealized
Appreciation
Gross Tax
Unrealized
Depreciation
Net Tax
Unrealized
Appreciation on
Investments
$387,733,878
 $  9,681,727
 $     (2,179,891)
 $        7,501,836
 
Fair value is defined as the price that the Trust would receive to sell an investment or pay to
 
transfer a liability in an orderly transaction with an independent buyer in the principal market,
 
or in the absence of a principal market the most advantageous market for the investment
 
or liability. There are three different categories for valuations. Level 1 valuations are
 
those based upon quoted prices in active markets. Level 2 valuations are those based upon
 
Fair value is defined as the price that the Trust would receive to sell an investment or pay to
 
transfer a liability in an orderly transaction with an independent buyer in the principal market,
 
or in the absence of a principal market the most advantageous market for the investment
 
or liability. There are three different categories for valuations. Level 1 valuations are
 
those based upon quoted prices in active markets. Level 2 valuations are those based upon
 
quoted prices in inactive markets or based upon significant observable inputs (e.g. yield
 
curves; benchmark interest rates; indices). Level 3 valuations are those based upon unobservable
 
inputs (e.g. discounted cash flow analysis; non-market based methods used to
   
determine fair valuation).
           
             
The Trust adopted the Accounting Standards Update, Fair Value Measurements and
 
Disclosures (Topic 820): Improving Disclosures about Fair Value Measurements which provides
 
guidance on how investment assets and liabilities are to be valued and disclosed.
   
Specifically, the amendment requires reporting entities to disclose: i) the input and valuation
 
techniques used to measure fair value for both recurring and nonrecurring fair value
 
measurements, for Level 2 or Level 3 positions, ii) transfers between all levels (including
 
Level 1 and Level 2) are required to be disclosed on a gross basis (i.e. transfers out must be
 
disclosed separately from transfers in) as well as the reason(s) for the transfer, and iii) purchases,
 
sales, issuances and settlements must be shown on a gross basis in the Level 3 rollforward
 
rather than as one net number. The effective date of the amendment is for interim
   
and annual periods beginning after December 15, 2009, however, the requirement to provide
 
the Level 3 activity for purchases, sales, issuances and settlements on a gross basis will
 
be effective for interim and annual periods beginning after December 15, 2010. The Trust
 
adopted the disclosures required by this amendment, which did not have a material impact
 
on the financial statements.
           
             
The Trust values Level 1 securities using readily available market quotations in active markets.
 
The Trust values Level 2 fixed income securities using independent pricing providers who
 
employ matrix pricing models utilizing market prices, broker quotes and prices of securities
 
with comparable maturities and qualities. The Trust values Level 2 equity securities using
 
various observable market inputs in accordance with procedures established in good faith
 
by management and approved by the Board of Trustees. The Trust did
   
not have any Level 3 securities during the period ended February 28, 2011. There were no
 
transfers between Level 1 and Level 2 during the period ended February 28, 2011.
   
The following table represents the Trust’s investments carried on the Statement of Assets and
 
Liabilities by caption and by level within the fair value hierarchy as of February 28, 2011.
 
 
Description
 
Level 1
   
Level 2
   
Level 3
   
Total
 
(value in $000s)
                       
Assets:
                       
Municipal Bonds
  $ -     $ 342,259     $ -     $ 342,259  
Corporate Bonds
    -       15,099       -       15,099  
Asset Backed Securities
    -       19,453       -       19,453  
Collateralized Mortgage Obligations
    -       1,915       -       1,915  
Preferred Stock
    5,306       -       -       5,306  
Term Loans
    -       5,744       -       5,744  
Money Market Fund
    5,460       -       -       5,460  
Total
  $ 10,766     $ 384,470     $ -     $ 395,236  
                                 
Liabilities:
                               
Unfunded Commitments
  $ -     $ 5     $ -     $ 5  
Total
  $ -     $ 5     $ -     $ 5  
                                 
 
 
 

 
 
Item 2.     Controls and Procedures.

 
(a)
The registrant’s principal executive officer and principal financial officer have evaluated the registrant’s disclosure controls and procedures (as defined in Rule 30a-3(c) under the Investment Company Act of 1940, as amended) as of a date within 90 days of the filing date of this report and have concluded, based on such evaluation, that the registrant’s disclosure controls and procedures were effective, as of that date, in ensuring that information required to be disclosed by the registrant on this Form N-Q was recorded, processed, summarized and reported within the time periods specified in the Securities and Exchange Commission’s rules and forms.

 
(b)
There was no change in the registrant’s internal control over financial reporting (as defined in Rule 30a-3(d) under the Investment Company Act of 1940, as amended) that occurred during the registrant’s last fiscal quarter that has materially affected or is reasonably likely to materially affect the registrant’s internal control over financial reporting.

Item 3.    Exhibits.

A separate certification for each principal executive officer and principal financial officer of the registrant as required by Rule 30a-2(a) under the Investment Company Act of 1940, as amended (17 CFR 270.30a-2(a)) is attached hereto.
 
 
 

 
 
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.

Guggenheim Build America Bonds Managed Duration Trust

By:          /s/ Kevin M. Robinson                     
Kevin M. Robinson
Chief Executive Officer and Chief Legal Officer

Date:       April 28, 2011


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/ Kevin M. Robinson                     
Kevin M. Robinson
Chief Executive Officer and Chief Legal Officer

Date:       April 28, 2011


By:        /s/ John Sullivan                     
John Sullivan
Chief Financial Officer, Chief Accounting Officer and Treasurer
 
Date:    April 28, 2011