Grupo Ignacia issued 10-year corporate bonds two years ago. The bonds pay an annualized coupon of 10.7 percent on a semiannual basis, and the current annualized YTM is 11.6 percent. The current price of Grupo Ignacia’s bonds (per MXN100 of par value) is closest to:
我不太明白为什么periods是（10-2）*2=16
“-2”是为啥？
