Expansion VS Contraction

 
Expansion shows us those properties that are in an affected areas loose much greater amounts of value during recessionary periods. And in many smaller recessions un-affected areas may not suffer at all.  (Affected areas are those that are within a median rental range and typically well below the median home price, they are areas that greater unemployment, population changes, and foreclosures greatly affect the property values) 
 
 
Contraction is the opposite effect.  The properties that were over influenced are now in demand (due to affordability) when a market recovers. Therefore in order to return to a typical 4%-5% overall long term appreciation they must appreciate quicker in a shorter period of time than un-affected properties.