The document analyzes the months supply of housing inventory (MSI) over a two year period from March 2007 to March 2009 for the Keller Williams/Castro Valley market. It shows that the MSI decreased from 4.8 months in March 2007 to 3.0 months in March 2009, a decline of 1.9 months or 38.7%. The national MSI also declined over this period from 4.9 months to 4.9 months.