WilliamR.Gebhardt SoerenHvidkjaer BhaskaranSwaminathan Stock and bond market interaction: Does momentum spill over? Journal of Financial Economics 75 651–690 2005 WilliamR.Gebhardt SoerenHvidkjaer BhaskaranSwaminathan The cross-section of expected corporate bond returns: Betas or characteristics? Journal of Financial Economics 75 85–114 2005