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

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.

Investor demand for distressed property has been healthy, as rents rise to levels that can cover investors' costs while they wait for properties to appreciate. Giving investors a small tax break should further juice up demand, supporting prices for distressed homes and the market in general.

There are a lot of vacant properties that are dumping grounds.

Most of the essential catalysts for a significant rebound in share prices are present.

Indeed, the FHA was born out of the Great Depression, which was also caused in significant part by a foreclosure crisis. Mortgages in the early 1930s were mostly three- to five-year 'bullet' loans, which did not amortize and were due in full at maturity.