According to the MA Association of Realtors:
The inventory of single-family homes as of June 30, 2010 increased 5.0 percent from June 2009 (29,949 listings in 2009 to 31,538 listings in 2010) which translates into 6.1 months of supply in June 2010. This is down from 7.2 months of supply last year and down from 7.7 months in May 2010.
The inventory of condominiums on the market in June was essentially the same as the year before (12,406 listings in 2009 to 12,344 listings in 2010), which translates into 5.8 months of supply, which is down from 7.6 months in June 2009 and down from 7.4 months this past May.
Detached single-family homes stayed on the market an average of 107 days in June 2010 compared to an average of 135 days in June 2009. This is the lowest days on market average since December 2005. Condos stayed on the market an average of 114 days, down from an average of 135 days in June 2009. This was the lowest days on market average since August 2006. On a month-to-month basis, days on market for single-family homes were down from 114 days and condos were down from 125 days in May.