There was a great Page One article in the New York Sun by Bradley Hope today Amid Market Uncertainty, a New Hedge  that covers Radar Logic’s property derivative product RPX. (note: I head up Radar Logic Research). As a good reporter should, Bradley gathered a quote from Karl Case , one of the creators of another property index, the S&P/Case-ShillerÂ® Home Price Indices  that has been available for more than a year.
While I have met the widely quoted Yale economist Robert Shiller  and recently appeared with him at Lincoln Center at the Real Deal New Development Forum , I have not had the pleasure of meeting his longtime associate, Karl Case .
Mr. Case, who has been involved with research into real estate indices, said the RPX caters more toward dealers, but includes more “unpredictable random error” by using complex mathematics to calculate the values on a daily basis.
“They add fancy math, but they don’t add data,” he said.
Coming from a respected economist, I am surprised by his lack of understanding of RPX , and for making this type of comment, especially when RPX methodology is transparent and fully available on the Radar Logic web site.
Professor Case has really got it backwards. RPX has added data which is specifically excluded from the S&P/Case-ShillerÂ® Home Price Indices :
- Condos – “Condominiums and co-ops are specifically excluded” (from CSI)
- New construction – “new construction is excluded” (from CSI)
It is fair to say that the real estate markets in the metro areas covered in their index  have been significantly influenced by condo and new construction activity.
- Foreclosures – “subsequent sales by mortgage lenders of foreclosed properties are
candidates to be included in repeat sale pairs” (from CSI) How is this determined?
As far as the fancy math comment goes, all I can say is: “good grief.” The RPX proprietary methodology was created by an affiliate of Radar Logic, Ventana Systems  who for more than 20 years have been creating and deploying robust, comprehensive models of a complex environment for strategic visibility and control and whose current projects include modeling the national airspace system, research and development productivity, national economy, energy, climate, disease epidemiology and intervention. Ventana is run by the brightest people I have ever met.