One reason for the Zippy Loan System jumpZippy Loan System in prices is the drop in availability of new homes. A lack of available inventory in the new-house market has made demand increase proportionally.Given the fact that the housing market has made significant strides since 2011, there are some who view this forecast as a bit pessimistic. Since 2011, the median home price has gone up 18 percent, and sales of existing homes have gone up by 20 percent. However, the balance of forecasts regarding trends in 2014 tend to mirror those of Mr. Yun. The specter of rising interest rates and ongoing confusion about the way politicians will deal with the national budget and debt ceiling make for some economic uncertainty.