To: Paul Kern who wrote (46455 ) 1/1/2006 3:47:20 PM From: Schnullie Read Replies (1) | Respond to of 306849 The below was taken from the linked article:Even before the reset gets under way, households were devoting a record 13.75 percent of their after-tax income to servicing debt, including mortgage debt. 'There will be an end to it. Perhaps my view is skewed from living in the Bay Area, where after-tax debt servicing probably surpasses 50%. Can somebody help me with the math for the 13.75% cited above. Using rough numbers, I think national income averages less than $45,000 or so. Using 25% tax withholding yields after-tax income of $34,000. If 13.75% goes to debt servicing, and conservatively assuming that ALL of it goes to mortgage debt servicing, an annual mortgage payment of only $4,640, or $387 a month is calculated. This is less than I used to pay for a month of parking in a SF garage (really). Of course you have to throw in a bit for insurance (say $50 since cheap property is implied), principal (say $100), prop tax (say $100), but even this total seems like a throwback to the 1960s, and certainly not indicative of a bubble. Where is my error here? To confirm the absurdity of the 13.75% figure, let's assume that the amount represented a 5.5% loan on a nothing-down ARM. The $4,640 annual interest payment would represent an initial mortage amount (i.e., purchase price) of about $83,000. One possibility is that the numbers are skewed low because they include people who have (1) paid off their mortgages and have a 0% debt-servicing obligation, and (2) people who have been in their houses for 10+ years and probably re-fi'ed on modest loan amounts. Of course, it could be argued that statistics for these folks shouldn't be lumped with sub-prime and speculative stats, as they represent no particular threat to loan integrity and are unlikely to be significantly impacted by rising interest rates, etc as will be the sub-prime borrowers. While they do need to be considered for other purposes (national average figures), the percentage of after-tax debt servicing is probably much much higher for a large group of at-risk borrowers (such as those who have bought recently.... excluding Hank of course).