Consider a 3-year 8% semiannual coupon bond. The YTM of this bond is 6%. Compute the following
a) Macaulay Duration (use Mac Duration
b) Modified Duration
c) Effective duration (assume a ±50 BP change of Yield)
d) Convexity Factor (use
e) Effective Convexity Factor (assume a ±50 BP change of Yield)
1.Let the coupon face value be 1000
Coupon Rate | 8% | 8% | 8% | 8% | 8% | 8% |
Maturity Period | 6 months | 1 year | 1.5 year | 2 year | 2.5 year | 3 year |
Discount Factor | 0.9615 | 0.9246 | 0.8890 | 0.8548 | 0.8219 | 0.7903 |
Cash flow | 40 | 40 | 40 | 40 | 40 | 1040 |
Present value of cashflows | 38.46154 | 73.9645 | 106.68 | 136.7687 | 164.3854 | 4931.563 |
current bond price | 5451.82 | |||||
bond value | 1000 | |||||
macauley duration | 5.45182 |
discount factor = 1/(1+r)n
2.
The modified duration formula is:
Modified Duration=Macauley Duration/1+(YTM/n)
where n =number of coupons period per year
=5.45/[1+6/2)]
=5.45/4
=1.3625 years
3
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