Reading 61: Risks Associated with Investing in Bonds LOSf习题 border, increase, interpret, 2010

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LOS f: Compute and interpret the duration and dollar duration of a bond.

Duration of a bond normally increases with an increase in:

A) yield to maturity.

B) time to maturity.

C) coupon rate.

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Duration is directly related to maturity and inversely related to the coupon rate and yield to maturity (YTM). Duration is approximately equal to the point in years where the investor receives half of the present value of the bond's cash flows. Therefore, the later the cash flows are received, the greater the duration. 

The longer the time to maturity, the greater the duration (and vice versa). A longer-term bond pays its cash flows later than a shorter-term bond, increasing the duration. The lower the coupon rate, the greater the duration (and vice versa). A lower coupon bond pays lower annual cash flows than a higher-coupon bond and thus has less influence on duration. The lower the YTM, the higher the duration. This is because the bond's price (or present value) is inversely related to interest rates. When market yields fall, the value (or cash flow) of a bond increases without increasing the time to maturity.

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Assuming a flat term structure of interest rates of 5%, the duration of a zero-coupon bond with 5 years remaining to maturity is closest to:

A) 4.35.

B) 3.76.

C) 5.00.

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The duration of a zero coupon bond is approximately equal to its time to maturity.

honeycfa

Which of the following bonds has the shortest duration? A bond with a:

A) 20-year maturity, 6% coupon rate.

B) 10-year maturity, 6% coupon rate.

C) 10-year maturity, 10% coupon rate.

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All else constant, a bond with a longer maturity will be more sensitive to changes in interest rates. All else constant, a bond with a lower coupon will have greater interest rate risk.

honeycfa

Which of the following bonds has the shortest duration? A bond with a:

A) 20-year maturity, 6% coupon rate.

B) 10-year maturity, 6% coupon rate.

C) 10-year maturity, 10% coupon rate.

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All else constant, a bond with a longer maturity will be more sensitive to changes in interest rates. All else constant, a bond with a lower coupon will have greater interest rate risk.

honeycfa

All else held equal, the duration of bonds selling at higher yields compared to bonds selling at lower yields will be:

A) cannot be determined with the information given.

B) lower.

C) greater.

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Duration is inversely related to yield to maturity (YTM). The higher the YTM, the lower the duration. This is because the change in the bond's price (or present value) is inversely related to changes in interest rates. When market yields rise, the value (or cash flow) of a bond decreases without decreasing the time to maturity.

Duration is also a function of volatility (risk).  Higher volatility (risk) = higher duration.  A higher coupon bond has a lower duration relative to a similar bond with a lower coupon because the bond holder is getting more of their cash value sooner (because of the higher coupon).  This lowers the overall risk of the bond resulting in a lower duration.

honeycfa

For coupon-paying bonds, duration and years to maturity:

A) may be equal depending on the coupon rate.

B) are equal.

C) are unequal with duration less than years to maturity.

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For coupon paying bonds, duration is less than maturity.

Duration is approximately equal to the point in years where the investor receives half of the present value of the bond's cash flows. Since zero-coupon bonds only have one cash flow at maturity, the duration is approximately equal to maturity. Any coupon amount will shorten duration because some cash flow is received prior to maturity.

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Which of the following statements about duration is TRUE?

A) A bond's percentage change in price and dollar change in price are both tied to the underlying price volatility.

B) The result of the formula for effective duration is for a 0.01% change in interest rates.

C) The formula for effective duration is: (price when yields fall - price when yields rise) / (initial price * change in yield expressed as a decimal).

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The statement that a bond's percentage change in price and dollar change in price are both tied to the underlying price volatility is true.

The effective duration formula result is for a 1.00% change in interest rates (100 basis points equals 1.00%, or 0.01 in decimal form). The denominator is multiplied by 2.

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What is the duration of a floating rate bond that has six years remaining to maturity and has semi-annual coupon payments. Assume a flat-term structure of 6%. Which of the following is closest to the correct duration?

A) 6.000.

B) 4.850.

C) 0.500.

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The duration of a floating rate bond is equal to the time until the next coupon payment takes place. As the coupon rate changes semi-annually with the level of the interest rate, a floating rate bond has the same duration as a pure discount bond with time to maturity equal to the time to the next coupon payment of the floating rate bond.

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With an option-free zero-coupon bond the effective duration is:

A) approximately equal to its years to maturity.

B) unrelated to its time to maturity.

C) approximately equal to the number of semiannual periods to maturity.

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For an option-free zero coupon bond, effective and modified duration will be almost identical and both will be approximately equal to the bond's years to maturity.

honeycfa

Which of the following statements concerning bond duration is least accurate? Duration:

A) decreases as the coupon increases.

B) is the weighted-average maturity of the cash flows of the bond.

C) increases as market yields rise.

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Duration decreases as market yields rise.