What do you mean by ‘shadow inventory’? I’ve never heard the term before- are you talking about properties under contract?
FromLori posted a link to Corelogic, they track shadow inventory for a living. I would only add “discouraged sellers who would if they could immediately put their residential real estate on the market if the market showed signs of life” as another sector of shadow inventory.
Shadow Inventory
CoreLogic estimates shadow inventory, sometimes called pending supply, by calculating the number of properties that are seriously delinquent (90 days or more), in foreclosure and real estate owned (REO) by lenders and that are not currently listed on multiple listing services (MLSs). Shadow inventory is typically not included in the official metrics of unsold inventory.
According to CoreLogic, the visible supply of unsold inventory was 4.2 million units in August 2010, the same as the previous year. The visible inventory measures the unsold inventory of new and existing homes that were on the market. The visible months’ supply increased to 15 months in August, up from 11 months a year earlier due to the decline in sales during the last few months.
The total visible and shadow inventory was 6.3 million units in August, up from 6.1 million a year ago. The total months’ supply of unsold homes was 23 months in August, up from 17 months a year ago. Although it can vary and it depends on the market and real estate cycle, typically a reading of six to seven months is considered normal so the current total months’ supply is roughly three times the normal rate.