Duration

Average duration provides a measure of a fund's interest-rate sensitivity the longer a fund's duration, the more sensitive the fund is to shifts in interest rates. The relationship between funds with different durations is straightforward: A fund with a duration of 10 years is twice as volatile as a fund with a five-year duration. Duration also gives an indication of how a fund's NAV will change as interest rates change. A fund with a five-year duration would be expected to lose 5% from its NAV if interest rates rose by one percentage point or gain 5% if interest rates fell by one percentage point.