Source: US. Bureau of the Census
Release: Housing Vacancies and Homeownership
The homeowner vacancy rate is the proportion of the homeowner inventory that is vacant for sale.
US. Bureau of the Census, Homeowner Vacancy Rate for the United States [RHVRUSQ156N], retrieved from FRED, Federal Reserve Bank of St. Louis; https://fred.stlouisfed.org/series/RHVRUSQ156N, August 24, 2016.