Definition of Terms in Fund Name |
Aug. 05, 2026 |
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| Fund Name Disclosure [Line Items] | |
| Definition of Rule 35d-1 Term in Fund Name [Text Block] | Under normal circumstances, the trust invests at least 80% of the value of its assets in common shares of closed-end investment companies (“Closed-End Funds”) that invest substantially all of their assets in tax-free municipal bonds, which are rated investment-grade by at least one nationally recognized statistical rating organization. |