You're off by around a factor of 10 because you're valuing MBS as if they're annuities without a terminal value. MBS are backed by the USG and you get the full principal back at by maturity.
You're off by around a factor of 10 because you're valuing MBS as if they're annuities without a terminal value. MBS are backed by the USG and you get the full principal back at by maturity.