Jonathan Mondillo, head of North American fixed income for abrdn says that record discount levels for municipal bond closed-end funds, coupled with attractive yields on those funds, are creating real opportunities for investors, though he warns about the middle of the yield curve, noting that the most compelling values are at the two ends of the barbell -- the short-term and long-duration paper -- which he expects to continue even as the rate cycle plays out and the Federal Reserve finally moves to cut rates.