A
Principal
Principal
Image 1 The amount owed on a loan. Usually the face value of a debt (a bond).
Image 2 The principal is the initial money invested in a bond, in a $1000 bond with $50 coupon payments for several years the $1000 is the principal...if a bond is sold above the principal it is said to be at a premium, conversely if it is below it is said to be at a discount.


Bond

Face Value