From 2009 to 2011, the mean wealth of the 8 million households in the more affluent group rose to an estimated $3,173,895 from an estimated $2,476,244, while the mean wealth of the 111 million households in the less affluent group fell to an estimated $133,817 from an estimated $139,896.
These wide variances were driven by the fact that the stock and bond market rallied during the 2009 to 2011 period while the housing market remained flat.
Affluent households typically have their assets concentrated in stocks and other financial holdings, while less affluent households typically have their wealth more heavily concentrated in the value of their home.