My friend's son and his fiancée found a house with an assumable mortgage at 2.5%. The house is $350,000 and it's only 4 years old. They want $90,000 down. Are there any risks with this? To have ...

Someone making $100,000 who puts 20% down on a 30-year fixed-rate mortgage with a 6.5% interest rate could afford a house that costs as much as $396,000.

If the interest rate falls by 0.25 percentage points but house prices rise by 2%, the new monthly payment is little changed, at $4,762. On top of this, the 20% down payment on that new home will ...