| 1 | Beaver County Industrial Development Authority, Pennsylvania, Pollution Control Revenue Bonds, FirstEnergy Generation Project, Refunding Series 2006A | PA | Unknown | 2.139% |
| 2 | COLORADO HEALTH FACILITIES AUTHORITY | CO | Health Care and Social Assistance | 0.812% |
| 3 | Metropolitan Washington D.C. Airports Authority, Airport System Revenue Bonds, Refunding Series 2016A | DC | Unknown | 0.488% |
| 4 | New York Transportation Development Corporation, New York, Special Facility Revenue Bonds, American Airlines, Inc. John F Kennedy International Airpor | NY | Unknown | 0.289% |
| 5 | Government of Guam, Business Privilege Tax Bonds, Refunding Series 2015D | GU | Unknown | 0.231% |
| 6 | Virgin Islands Public Finance Authority, Gross Receipts Taxes Loan Note, Working Capital Series 2014A | VI | Unknown | 0.219% |
| 7 | Puerto Rico (Commonwealth of) | PR | Unknown | 0.039% |
| 8 | The Rector and Visitors of the University of Virginia, General Pledge Revenue Bonds, Refunding Series 2017A | VA | Unknown | 0.017% |