London, July 27 ( ANI ): After Japan was struck by a devastating tsunami-cum-earthquake last year, the average life expectancy of the country's women has taken a hit, removing them from the global longevity chart for the first time in 26 years.
According to The Guardian, the average life expectancy among Japanese men fell slightly to 79.
Over the past 150 years, the average life span--and correspondingly, the maximum life span--has been steadily increasing, Wilmoth says.
So, Perls and other researchers have compared siblings of centenarians with siblings of people born in the same years as the centenarians but who died at 73, the average life expectancy for people born in the late 1800s.
An additional crucial element to understanding the workings of the MBS market is the knowledge that because mortgages are prepayable at par before maturity, the average life of a mortgage pass-through is always far shorter than its stated final maturity.
The relative attractiveness of the yield and return can be judged in relation to a Treasury security of a comparable average life.
For example, at the start of 1993, newly issued 30-year GNMA 8s were expected to prepay at a speed of around 130 percent PSA with an expected average life of a little more than 10 years.
But the dramatic decline in mortgage rates during the year doubled the prepayment speed for those newly issued 30-year GNMA 8s and shortened their expected average life to around five years.
8-year average life planned amortization class (PAC) of a Freddie Mac REMIC series 1279.
The term PAC band refers to the range of future prepayments of the underlying collateral within which the average life of the PAC remains stable.
Within the range of 95 percent PSA and 250 percent PSA, in the example just mentioned, the average life of the PAC will always be 11.
However, they should be aware of the newly emerging pitfall of average life lengthening.