The Relative Informational Efficiency of Stocks and Bonds: An Intraday Analysis

Chris Downing, Shane Underwood and Yuhang Xing

Journal of Financial and Quantitative Analysis, 2009, vol. 44, issue 5, 1081-1102

Abstract: In light of recent improvements in the transparency of the corporate bond market, we examine the relation between high frequency returns on individual stocks and bonds. In contrast to the authors of previous literature, we employ comprehensive transactions data for both classes of securities. We find that hourly stock returns lead bond returns for nonconvertible junk- and BBB-rated bonds, and that stock returns lead bond returns for convertible bonds in all rating classes. Most of the predictable nonconvertible bonds are issued by companies in financial distress, while the predictable convertible bonds are those with conversion options more deeply in-the-money. These results indicate that the corporate bond market is less informationally efficient than the stock market, notwithstanding the recent improvements in bond market transparency and associated reductions in corporate bond transaction costs.

Date: 2009
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