Bond prices generally move in the opposite direction of interest rates. A sustained increase in demand should support munibond performance over the coming months.Issuer fundamentals remain stable. Supply and demand drive opportunities, and there is currently a shortage of municipal bond supply. Another risk is the increased supply of coupon bonds with less demand at current prices. This table describes the fees and expenses that you may pay if you buy, hold and sell shares of the Fund. Risk, and supply of and demand for bonds. Bond prices generally move in the opposite direction of interest rates. The Ben Franklin effect is a psychological phenomenon in which people like someone more after doing a favor for them.