People start trying to trade in their cash for bonds. The demand for bonds increases, which increases the price of bonds.As demand for bonds increases, so do bond prices and bondholder returns. The many different kinds of bonds. In summary, rising expected inflation rates lead to decreased bond demand, increased bond supply, and higher interest rates in the bond market. For bond investors, this means more of the same: low and negative yields, strong demand for income assets, and episodic market volatility. Use the graph and the supply and demand for bonds to show what will happen to interest rates if there is a rise in the riskiness of bonds. Learn about the relationship between bond prices and interest rates. A demand for any particular bond will be 0 if its price is above the present value and infinity if it's below. Interest rates and bonds often move in opposite directions.