An indicator of interest rate risk. In general, the higher the concentration of longer maturity issues, the more a portfolio's share price will fluctuate in response to changes in interest rates.
It Means, for any Class of Shares, a distribution made to shareholders on Maturity Date in an amount equal to 17.5% of the original NAV per share of the applicable Class of Shares.
Maturity distributions into four types:
The abrupt transition to maturity (type I),
Successive increases in proportion mature with an increase in age or length (type II),
Nonsuccessive increases in proportion mature with the increase in age or length (type III), and
Absence of 100% maturity at any age (type IV).