Assume you hold a 2-year coupon bond. You want to replace
this bond by a portfolio of bonds with the same market value
and $-Duration. How can you achieve this?
In order to replicate 2 year coupon bond with portfolio of bonds, I would create a portfolio having same future cashflows.
I would buy following bonds:
1 year zero coupon bond with maturity value equal to yearly coupon amount and
2 year zero coupon bond with maturity value equal to (yearly coupon + face value of 2 year coupon bond).
Market value of portfolio of above 2 bonds will be equal to market value of 2 year coupon bond
and $ duration of above portfolio will be same as $ duration of 2 year coupon bond.
Crux is to replicate future cashflows of 2 year coupon bond
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