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It shows up in the Scheweser Practice Problems.onlysimon wrote:
if interest rates are lower than coupon rate, then you would be expecting the bondholder to call and refinance. I.e. the call is very valuable to the bond issuer.
if interest rates rise then the value of the call will drop. so the issuer loses and the holder gains.
(seems like a L2 question?)
Because the callable bond has a lower effective duration than the non-callable bond.RoccoLee wrote:When interest rate is in the historical low below coupon rate, and expected to rise, why callable bond will outperform the non-callable bond?
Thanks a lot!daharmattan1 wrote:
If we break down a MBS, its position is basically the combination of two things:
The option is what gives an MBS negative convexity. What that downward slope shows is that as interest rates decrease people “exercise” their prepayment option and refinance their mortgages at lower rates..
- An option free bond that pays interest like an annuity, spread evenly over the life of the security
- A short call option (Remember, if volatility up, the option value goes up, and the MBS Price goes down)
As a holder of an MBS, this prepayment of mortgages means that you are now receiving cash flows earlier. Furthermore, you have high reinvestment risk because interest rates are suddenly lower just as you have cash on hand. When the option is out of the money the MBS will have positive convexity. The level of convexity, or the rate at which prepayments will occur, depends on the current level of interest rates relative to the coupon on the MBS.
To summarize:
If rates are high: Prepayments decrease, Duration increases, and MBS Price decreases less than a non-callable bond
If Rates are low: Prepayment increases (the option is in the money), duration decreases, and the MBS Price increases less than a non-callable bond