The latest RTB issue rate is 4. Tags: bond fund , bonds , government bonds , how to invest in bonds , invest bonds philippines , Investing , investments , retail treasury bond , retail treasury bonds interest rate , rtb , treasury bonds philippines. Furthermore, there are zero-coupon bonds which are sold at a price lower than the face value. Not yet enrolled? A bond is a debt security. At year 10, ALI will then return the P, principal to you. Thanks for this, I have already read about and interested in T-bills.