Zillow Research

As Predicted, July Case-Shiller 20-City Index Shows Another Strong Month of Appreciation

Today, the S&P/Case-Shiller Home Price Indices showed that the non-seasonally adjusted July 10- and 20-City Composite rose 0.6% and 1.2% on a year-over-year basis, in line with Zillow’s forecast released last week. On a seasonally adjusted monthly basis, the 10- and 20-City Composites both rose 0.4%  from June to July. The table below shows how our forecast compared with the actual numbers.

“July shows another strong month of appreciation for Case-Shiller albeit down slightly from June’s revised monthly pace and somewhat lower than our expectations. The indices have, however, still yielded a better annual comparison than last month, reflecting organic growth in the housing market, which further confirms what we’ve been seeing over the last few months in other data: the housing market is in recovery mode,” said Zillow Chief Economist Dr. Stan Humphries. “Given the more recent August Zillow Home Value Index was down slightly month-over-month, we anticipate Case-Shiller’s monthly appreciation to slow even more substantially in August.”

“While Case-Shiller’s monthly trends will get worse in the back half of this year, largely a function of declining overall monthly sales volumes which will increase the percentage of foreclosure re-sales included in transactions tracked by Case-Shiller, we do expect the 10- and 20- City indices to continue to show solid annualized growth through year end, added Humphries”

Our forecasting model incorporates previous data points of the Case-Shiller series, as well as Zillow Home Value Index data and national foreclosure re-sales. To see how Zillow’s forecast of the June Case-Shiller indices compared, see our blog post from last month.

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The Zillow Editorial Team is dedicated to empowering home buyers, sellers, and renters with expert insights, data-driven research, and practical advice. Our team of housing market analysts, real estate professionals, and writers brings you the latest trends, tips, and tools to help you navigate every step of your real estate journey. Whether you're exploring neighborhoods, estimating home values, or planning your next move, we provide the knowledge you need to make informed decisions with confidence.
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