Why does adding a shorter-duration bond lower portfolio duration?
I thought duration was kind of a fixed trait of the original bond portfolio. If a manager adds a bond with much lower duration than the current holdings, does the whole fixed-income sleeve automatically become less rate-sensitive?
Yes, if the question is talking about the fixed-income sleeve and the added bond truly has lower duration than the existing holdings, the sleeve's duration usually falls because duration is a market-value-weighted average.
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