>> One issue is that many mortgages come with a 'teaser rate' -- an 
>> introductory rate that lasts for some amount of time, like a year.  
>> So say you got a prime+2 mortgage (when prime was 5%) with a 2% rate 
>> increase cap/year and a 3.5% teaser for a year.  Say you borrowed 
>> $200,000.  Your monthly payment at 3.5% is $898/mo.  After a year, it 
>> goes up to $1,135/mo (ignoring your principal decrease).  After 
>> another year it does the max 2% rise to to 7.5%: $1398/mo.  Prime is 
>> now 7.5%, so your prime+2 is hitting 9.5% or $1,681/mo ... that's 
>> twice what it was three years ago, even though you've only seen a 3% 
>> rise in rates. 
>
OK. But then this suggests that people are either unable to do math or 
that they bought to speculate on rising prices.
Probably the latter since buying a house is a BIG deal and who would do that without knowing what the cost would be three yers down the road. .....
Joanna