Par value(face value)=pricipal amount, repaid t maturity,面值即本金到期偿还
Coupon rate=annual coupon divided by face value
Coupon=stated interest payment(票面利息)
YTM(Yield or Yield to maturity,到期收益率)=rate of return required in the market for bond,market rate, internal rate of return
Current Yield(利息收益率)=annual coupon/price
YTM=currentyield+capital gains yeild(资本收益率)