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Bond Roll Down Return Calculator

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The Bond Roll Down Return Calculator helps investors estimate the return on a bond that results from the bond's movement along the yield curve over a specific holding period. As bonds get closer to maturity, they often experience a decrease in yield, leading to an increase in price. The roll-down return reflects this price appreciation, which is separate from the bond's coupon payments. By calculating roll-down returns, investors can assess the potential gains from holding bonds over time in a changing interest rate environment.

This tool is particularly useful for bond traders and fixed-income portfolio managers who are looking to maximize returns by taking advantage of yield curve shifts.

Formula of Bond Roll Down Return Calculator

The formula for calculating the bond roll-down return is:

Roll Down Return (%) = (Bond Price at Exit - Bond Price at Entry) / Bond Price at Entry

Where:

  • Bond Price at Entry: The bond’s price when purchased.
  • Bond Price at Exit: The bond’s expected price after rolling down the yield curve, typically reflecting the decrease in yield over the holding period.
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Key Terms:

  • Bond Price at Entry: The price at which the investor buys the bond.
  • Bond Price at Exit: The price at which the bond is expected to be sold or valued after it rolls down the yield curve.
  • Yield Curve: A graphical representation of bond yields across different maturities. As bonds get closer to maturity, their yield tends to decline, increasing their price.
  • Roll-Down Return: The return on a bond due to price appreciation as it moves along the yield curve toward maturity.

General Reference Table for Bond Yield Curves

Here is a table that provides an example of how yields may change based on bond maturities:

Bond Maturity (Years)Yield (%)Bond Price ($)Expected Price after Roll Down ($)
104.001,0001,020
53.501,0151,030
22.801,0301,045
12.501,0451,060

This table shows how bond prices tend to increase as the bond moves closer to maturity and rolls down the yield curve.

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Example of Bond Roll Down Return Calculator

Let’s walk through an example to demonstrate how the Bond Roll Down Return Calculator works.

Scenario:

An investor buys a 10-year bond with a face value of $1,000 at a price of $980, and the bond has a yield of 4%. The investor holds the bond for three years, during which time the bond rolls down the yield curve to a new yield of 3%. The bond’s new price after three years is expected to be $1,020.

  1. Step 1: Identify the bond price at entry and exit:
    • Bond Price at Entry: $980
    • Bond Price at Exit: $1,020
  2. Step 2: Use the roll-down return formula: Roll Down Return = ($1,020 - $980) / $980 = $40 / $980 = 0.0408 or 4.08%

So, the bond roll-down return over the three-year period is 4.08%.

Scenario 2:

If the investor instead holds the bond for five years, and the bond’s price rises to $1,030 due to further yield curve roll-down:

  1. Step 1: New bond price at exit:
    • Bond Price at Exit: $1,030
  2. Step 2: Apply the formula: Roll Down Return = ($1,030 - $980) / $980 = $50 / $980 = 0.0510 or 5.10%
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Thus, the investor would achieve a 5.10% return over five years.

Most Common FAQs

1. What is roll-down return in bond investing?

Roll-down return is the gain achieved by a bond as its yield decreases over time, causing its price to rise as it moves along the yield curve. This return is separate from the coupon payments and reflects the bond’s price appreciation.

2. How does the yield curve affect roll-down return?

The yield curve illustrates bond yields across different maturities. As a bond approaches maturity, its yield generally decreases, leading to an increase in its price. This price appreciation contributes to the roll-down return.

3. Can roll-down returns be negative?

Yes, roll-down returns can be negative if the bond’s yield increases (rather than decreases) over the holding period. This would cause the bond price to drop, resulting in a capital loss.

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