A 10-year us treasury bond with a face value of $10,000 pays a coupon of 5.5% (2.75% of face value every 6 months). the semiannually compound interest rate is 5.2% (a six-month discount rate of 5.2/2 = 2.6%). what is the present value of the bond?

Respuesta :

Answer: The Present Value of the bond is $10,231.64.

We have

Face Value of the bond                $10000

Coupon rate per year                          5.5%

Frequency of int payments             Semi-Annual (two periods in a year)

Discount rate per year                         5.2%

No. of years to maturity                         10 years

First we calculate the coupon interest per period

[tex]C = Face Value * \frac{interest rate}{2}[/tex]

[tex]C = 10000 * \frac{0.055}{2}[/tex]

[tex]C = 10000 * \frac{0.055}{2}[/tex]

[tex]C = 10000 * 0.0275[/tex]

[tex]C = 275[/tex]

We can think of a bond as an instrument have types of cash flows.

One is the coupons we receive from a bond, where we receive a fixed amount per period for a stated number of periods.

An instrument that gives a fixed amount per period for a stated number of periods is known as an annuity.

Hence we can treat the coupon from the bonds as an annuity.

The Present Value formula for an annuity is:

[tex]PV_{Coupons} = C\left \{ \frac{1-(1+i)^{-n}}{i} \right\}[/tex]

where

C = Coupon per period

i = discount rate per period

n = number of periods

In this question, we'll get [tex]2*10 =20[/tex] coupon payments, so the number of periods, n = 20.

The discount rate per period (i) is [tex]\frac{0.052}{2} = 0.026[/tex] or 2.6% per period.

Applying these values to the equation above we can find the PV of Coupons as:

[tex]PV_{Coupons} = 275\left \{ \frac{1-(1+0.026)^{-20}}{0.026} \right\}[/tex]

[tex]PV_{Coupons} = 275\left \{ \frac{1-(1+0.026)^{-20}}{0.026} \right\}[/tex]

[tex]PV_{Coupons} = 275\left \{ \frac{0.598484331}{0.026} \right\}[/tex]

[tex]PV_{Coupons} = 275 * 15.44291035[/tex]

[tex]PV_{Coupons} = 4246.800346[/tex]

In addition to the coupon, we also get back the bond's face value at the end of the bond's life. We can treat this as a lump-sum amount we will get back at the end of a stated number of periods. We can find the Present Value of the lumpsum as follows:

[tex]PV = \frac{Face Value}{(1+i)^{n}}[/tex]

Substituting the values we get,

[tex]PV = \frac{10000}{(1+0.026)^{20}}[/tex]

[tex]PV = \frac{10000}{1.670887521}[/tex]

[tex]PV_{lump sum} = 5984.843309[/tex]

Finally, we compute the Present Value of the bond as follows:

[tex]PV_{bond} = PV_{Coupons} + PV_{lump sum}[/tex]

[tex]PV_{bond} = 4246.800346 + 5984.843309[/tex]

[tex]PV_{bond} = 10231.64366[/tex]