Determinants of Corporate Bond Trading: A Comprehensive Analysis

This paper studies the determinants of trading volume and liquidity of corporate bonds. Using transactions data from a comprehensive dataset of insurance company trades, our analysis covers more than 17,000 US corporate bonds of 4,151 companies over a five-year period prior to the introduction of TRACE. Our transactions data show that a variety of issue- and issuer-specific characteristics impact corporate bond liquidity. Among these, the most economically important determinants of bond trading volume are the bond’s issue size and age — trading volume declines substantially as bonds become seasoned and are absorbed into less active portfolios. Stock-level activity also impacts bond trading volume. Bonds of companies with publicly traded equity are more likely to trade than those with private equity. Further, public companies with more active stocks have more actively traded bonds. Finally, we show that while the liquidity of high-yield bonds is more affected by credit risk, interest-rate risk is more important in determining the liquidity of investment-grade bonds.