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10#
发表于 2011-7-13 15:28
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A little illustration.
Let us assume there is a 5-year putable bond and there is another 5-year option free bond. Both have the same credit rating from the same issuer. Assuming the option free bond has a yield of 7% and the putable bond has a yield of 5% (remember that the yields/coupon on putable bonds are lower than option free yields/coupon because of the option to put). Which of these two bonds will you buy when interest rates are falling?
Also remember that the chances of default generally reduce with falling rates because of several factors (opportunity to refinance, lower rates boost economic activities, etc). This lead to the put option in a putable bond losing its value since bonds are not likely to fall in prices and hence need to be "put" back to the issuer.
With the option of buying any of the two bonds, you will prefer the one with a higher yield, which is the option free one. All rational portfolio managers will go for the option free bond and this will make it outperform the putable bond.
This is as simple as I think I can make it. |
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