With today's release of the May S&P/Case-Shiller Home Price Index, we learned that seasonally adjusted home prices for the benchmark 20-city index were up 0.21% month over month. The seasonally adjusted national index year-over-year change has hovered between 4.2% and 6.7% for the last two-plus years. Today's S&P/Case-Shiller National Home Price Index (nominal) reached another new high.

The adjacent column chart illustrates the month-over-month change in the seasonally adjusted 20-city index, which tends to be the most closely watched of the Case-Shiller series. It was up 0.21% from the previous month. The nonseasonally adjusted index was up 6.5% year-over-year.

Investing.com had forecast a 0.2% MoM seasonally adjusted increase and 6.4% YoY nonseasonally adjusted for the 20-city series.

Here is an excerpt from the analysis in today's Standard & Poor's press release.

“Home prices continue to rack up gains two to three times greater than the inflation rate,” says David M. Blitzer, Managing Director & Chairman of the Index Committee at S&P Dow Jones Indices. “The yearover-year increases in the S&P CoreLogic Case-Shiller National Index have topped 5% every month since August 2016. Unlike the boom-bust period surrounding the financial crisis, price gains are consistent across the 20 cities tracked in the release; currently, the range of the largest to smallest price change is 10 percentage points compared to a 20 percentage point range since 2001, and a 25 percentage point range between 2006 and 2009. Not only are prices rising consistently, they are doing so across the country."

“Continuing price increases appear to be affecting other housing statistics. Sales of existing single family homes – the market covered by the S&P CoreLogic Case-Shiller Indices – peaked last November and have declined for three months in a row. The number of pending home sales is drifting lower as is the number of existing homes for sale. Sales of new homes are also down and housing starts are flattening. Affordability – a measure based on income, mortgage rates and home prices – has gotten consistently worse over the last 18 months. All these indicators suggest that the combination of rising home prices and rising mortgage rates are beginning to affect the housing market." [Link to source]

The chart below is an overlay of the Case-Shiller 10- and 20-City Composite Indexes along with the national index since 1987, the first year that the 10-City Composite was tracked. Note that the 20-City, which is probably the most closely watched of the three, dates from 2000. We've used the seasonally adjusted data for this illustration.

Home Price Index