Corporate Bond Yield Spreads in Recent Decades

An Examination Of Trends, Changes, And Stock Market Linkages

By Douglas J. Lamdin

Douglas J. Lamdin is an Associate Professor of Economics at the University of Maryland, Baltimore County (UMBC). He is also the Director of the Financial Economics program at UMBC. He received his Ph.D. in Economics from the University of Maryland, College Park.

Corporate bond interest rates are a subject of concern to investment analysts, corporate financial managers, and scholars. In this article the yield spreads between corporate bonds and government bonds and the spreads between differing quality corporate bonds are examined during recent decades. Also, the relationship between yield spreads and stock market movements is examined. Yield spreads vary considerably over this period, and have varying trends. Causality tests show that stock market movements precede changes in yield spreads.

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