Forecasts for both variants of the Case-Shiller Index are based on the current Zillow Home Value Index value for July, which we released as part of our Real Estate Market Reports a couple weeks ago, the June Case-Shiller home indices numbers and the national percentage for foreclosure re-sales in July , which can be found in the Zillow real estate market reports.
FORBES: Zillow Forecasts Tomorrow's Case-Shiller Report to Show 4% Yearly Decline, 1.2% Monthly Increase