For a bond to sell “at par” means that it is selling at full face value. When a bond sells at full face value, the coupon rate (or the bond yield) is the same as yield to maturity since bond interest does not compound.
For example: a bond has a face value of $1,000 with a coupon of 8%. If the bond costs you $1,000, or ‘par’, and you receive $1,080.00 at maturity (or the face value plus the 8% coupon), then your yield to maturity is 8% ($1080-$1000)/($1000) which is the same as the coupon.
Categories

One Comment
Because it has no profit or no loss since the selling price is equals to the cost (par value)
That is what we called breakeven.