A Moving to the next question prevents changes to this answer. Question 19 For an option-free variable-rate coupon bond, when its YTM increases and its coupon rate is adjusted upwards, its bond duration O a. could decrease. O b. could increase. Occould stay the same since YTM increases may be offset by coupon rate increases. d. Hard to tell; maturity not given. e. Hard to tell; YTM not given since duration effects are stronger at lower YTM than higher ones