Trading Costs in Three U.S. Bond Markets

Abstract

Newly available transaction data are available for comparison of trading costs in the U.S. Treasury bond market with U.S. corporate and municipal bond markets. The mean bid-ask spread per $100 par value is estimated at 23 cents for municipal bonds, 21 cents for corporate bonds, and 8 cents for Treasury bonds. Maturity, trade size, and credit ratings are key determinants of the bid-ask spread. After controlling for credit risk, the bid-ask spread is not statistically different between corporate and Treasury markets but it is higher for municipal bonds relative to Treasuries.