Here is a table of various housing supply measures (just putting this in one place with links to the source data).

Note: here is the Weekly Summary and a Look Ahead. It will be a busy week!

Housing Supply Overview
Total delinquent loans1	7.3 million
Seriously delinquent loans1,2	5.0 million
Total REO Inventory3	0.5 million
Fannie, Freddie, FHA REO4	210 thousand
Homeowners with Negative Equity5	11.2 million
Homeowner vacancy rate6	2.6%
Rental vacancy rate6	10.6%
Excess Vacant Units6,7	1.7 million
Existing Home Inventory8	3.89 million
Existing Home Months of Supply8	8.3 months
New Home Inventory9	213 thousand
New Home Months of Supply9	8.5 months

¹ Source: estimate based on the Mortgage Bankers Association’s (MBA) Q1 2010 National Delinquency Survey. "MBA’s National Delinquency Survey covers about 44.4 million first lien mortgages on one-to four-unit residential properties ... The NDS is estimated to cover around 85 percent of the outstanding first-lien mortgages in the country."

² This is based on the MBA's estimate of loans 90+ days delinquent or in the foreclosure process.

³ Source: Radarlogic and Barclays as of Feb 2010.

⁴ Source: Fannie Mae, Freddie Mac and FHA. Fannie, Freddie, FHA REO Inventory Surges 22% in Q1 2010

⁵ Source: CoreLogic Q1 2010 Negative Equity Report

⁶ Source: Census Bureau Residential Vacancies and Homeownership in the First Quarter 2010

⁷ CR calculation.

⁸ Source: National Association of Realtors

⁹ Source: Census Bureau New Residential sales