<t>mmautner, I'm relatively new at this, but I believe the reason for the 5 to 6 year maturity focus is because the average 30 year loan is refinanced in 5 to 6 years (as of the last 10 or so years) so this is what the rate for 30 year mortgages is based on. Thus if you lower the 5 to 6 yr yield, al...