“…This implies that the ratio between the coupon C and the mark-to-market value of debt is equal to the effective interest rate (i.e., the risk-free interest rate plus the default premium). 4 For a detailed analysis of dynamic strategies, with costly debt renegotiation, see, e.g., Broadie, Chernov, and Sundaresan (2007), Christensen et al (2002), Fan and Sundaresan (2000), Fischer, Heinkel, and Zechner (1989), Galai, Raviv, and Wiener (2007), Goldstein, Ju, and Leland (2001), Hennessy and Whited (2005) and Mella-Barral (1999). 5 The quality of results does not change if, according to Leland (1994), we assume that the default sunk cost is proportional to a firm's value.…”