The key to house prices is the share of foreclosure or short sales in the total housing market. When that share rises, house prices will fall, because distressed properties sell for significantly less - currently around 25 percent below non-distressed houses.

If Mr. Trump gets precisely the policies he says he wants, then the economy will suffer a recession.

The average credit score of today's FHA borrowers is higher than the average American household with a score. As it becomes more costly and difficult to get a FHA loan, loans from private mortgage lenders will become more attractive and their market share will grow.

The key to house prices is the share of foreclosure or short sales in the total housing market. When that share rises, house prices will fall, because distressed properties sell for significantly less - currently around 25 percent below non-distressed houses.

Lenders look at potential borrowers from many angles before extending credit: How much of its income will a household need to put into debt repayment? How large is the down payment? Does the borrower have a job with a stable income? What is the borrower's credit score?

Distressed properties are often vacant and in disrepair, and thus sold at significant discounts. As the share of distressed sales grows, home prices fall.

There is a banking adage that if it's growing like a weed, it's a good chance that it's a weed.