From RealTrends.com: CoreLogic reported Jan. 2, 2013 that the current residential shadow inventory as of October 2012 fell to 2.3 million units, representing a supply of seven months. The October inventory level represents a 12.3 percent drop from October 2011, when shadow inventory stood at 2.6 million units.CoreLogic estimates the current stock of properties in the shadow inventory, also known as pending supply, by calculating the number of properties that are seriously delinquent, in foreclosure and held as real estate owned (REO) by mortgage servicers but not currently listed on multiple listing services (MLSs). Transition rates of “delinquency to foreclosure” and “foreclosure to REO” are used to identify the currently distressed unlisted properties most likely to become REO properties. Properties that are not yet delinquent but may become delinquent in the future are not included in the estimate of the current shadow inventory. Shadow inventory is typically not included in the official reporting measurements of unsold inventory.