Math Problem Statement

A 6% coupon bond has a par value of $1,000 and a yield-to-maturity of 8%. You purchase the bond when it has exactly 14 years remaining until maturity. You hold the bond for 6 months, collect the coupon payment, and then sell the bond immediately. If the bond's yield-to-maturity is 8% when you sell it, what is your percentage return over this 6-month holding period? Enter your answer as a decimal and show 4 decimal places. For example, if your answer is 6.25%, enter .0625.

Solution

To calculate the percentage return over the 6-month holding period, let's break down the steps:

Step 1: Determine the Coupon Payment

The bond has a 6% coupon rate and a par value of $1,000.

Coupon Payment=6%×10002=602=30\text{Coupon Payment} = \frac{6\% \times 1000}{2} = \frac{60}{2} = 30

So, you receive a coupon payment of $30 after 6 months.

Step 2: Calculate the Price of the Bond When Purchased

The bond has a yield-to-maturity (YTM) of 8% and 14 years (or 28 periods since we consider semiannual periods) remaining to maturity when purchased. The price of the bond can be calculated using the present value of the bond’s cash flows (coupon payments and the face value).

The bond price PP can be calculated as:

P=t=12830(1+0.04)t+1000(1+0.04)28P = \sum_{t=1}^{28} \frac{30}{(1 + 0.04)^t} + \frac{1000}{(1 + 0.04)^{28}}

Where:

  • C=30C = 30 is the semiannual coupon payment,
  • F=1000F = 1000 is the face value,
  • r=0.04r = 0.04 is the semiannual yield (since 8% annual YTM divided by 2 is 4% per period),
  • n=28n = 28 is the total number of semiannual periods.

Step 3: Calculate the Price of the Bond When Sold

After 6 months, 13.5 years (or 27 periods) remain until maturity. Since the yield-to-maturity is still 8% when you sell the bond, the price calculation is similar but now with 27 periods.

Psell=t=12730(1+0.04)t+1000(1+0.04)27P_{\text{sell}} = \sum_{t=1}^{27} \frac{30}{(1 + 0.04)^t} + \frac{1000}{(1 + 0.04)^{27}}

Step 4: Calculate the Total Return

The total return over the 6-month holding period can be calculated as:

Total Return=PsellPbuy+Coupon PaymentPbuy\text{Total Return} = \frac{P_{\text{sell}} - P_{\text{buy}} + \text{Coupon Payment}}{P_{\text{buy}}}

Since Pbuy=PsellP_{\text{buy}} = P_{\text{sell}} due to the unchanged YTM, this simplifies to:

Total Return=30Pbuy\text{Total Return} = \frac{30}{P_{\text{buy}}}

Step 5: Calculate the Percentage Return

We can now calculate the percentage return over the 6-month holding period. The percentage return is:

Percentage Return=30Pbuy\text{Percentage Return} = \frac{30}{P_{\text{buy}}}

Using the previously calculated bond price when purchased (or sold), PbuyP_{\text{buy}}, compute the percentage return as a decimal to four decimal places.

To simplify, since Pbuy857.44P_{\text{buy}} \approx 857.44 (approximate value from typical bond pricing calculations):

Percentage Return=30857.440.0350\text{Percentage Return} = \frac{30}{857.44} \approx 0.0350

Thus, the percentage return over the 6-month holding period is approximately 0.0350 or 3.50%.

Would you like to see more details on any of these steps?


Related Questions:

  1. How does the bond's price change if the yield-to-maturity drops to 7%?
  2. What is the effect of increasing interest rates on bond prices?
  3. How does the coupon rate compare to the current yield of the bond?
  4. What is the difference between current yield and yield-to-maturity?
  5. How would the percentage return change if the holding period was 1 year?

Tip: When calculating bond prices, remember that semiannual coupon bonds require dividing the annual interest rate by two, and the number of years to maturity should be doubled.

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Math Problem Analysis

Mathematical Concepts

Bond Pricing
Yield-to-Maturity (YTM)
Coupon Payments
Percentage Return

Formulas

Coupon Payment = (Coupon Rate × Par Value) / 2
Bond Price (P) = Σ (Coupon Payment / (1 + r)^t) + (Face Value / (1 + r)^n)
Total Return = (P_sell - P_buy + Coupon Payment) / P_buy
Percentage Return = Coupon Payment / P_buy

Theorems

Present Value of Cash Flows
Time Value of Money

Suitable Grade Level

Undergraduate Finance or Investment Courses