U.S. house prices rose 1.6 percent in the second quarter of 2017 according to the Federal Housing Finance Agency (FHFA) House Price Index (HPI). House prices rose 6.6 percent from the second quarter of 2016 to the second quarter of 2017. FHFA's seasonally adjusted monthly index for June was up 0.1 percent from May.

The HPI is calculated using home sales price information from mortgages sold to, or guaranteed by, Fannie Mae and Freddie Mac.

"U.S. house prices rose in most states during the second quarter," said FHFA Senior Economist William Doerner. "New home sales are climbing but, relative to the overall population, they still remain low from a historical perspective. The tight inventory is a major explanation for why house prices have been increasing every quarter over the last six years."