National Market Index
National Home Price Index Adjusted for Inflation. Home Price Index / Consumer Price Index (CPI) since 1900. Standard & Poor's Case-Shiller releases the National HPI (Home Price Index) which measures the change in the selling price of single-family homes in 20 metropolitan areas. Every month, we take this index and we adjust it for inflation (HPI / CPI) so we can see the true appreciation at the national level.