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U.S. house prices accelerate in July -FHFA

WASHINGTON, Sept 24 (Reuters) - U.S. house prices accelerated in July amid gains across the key regions, a trend that could offset some of the boost to the housing market from declining mortgage rates.

The Federal Housing Finance Agency (FHFA) said on Tuesday its house price index increased a seasonally adjusted 5.0% in July from a year ago. That followed a 4.8% rise in June. Prices rose 0.4% on a monthly basis after advancing 0.2% in June.

The FHFA's index is calculated by using purchase prices of houses financed with mortgages sold to or guaranteed by mortgage finance companies Fannie Mae and Freddie Mac.

Prices increased 3.6% year-on-year in the Middle Atlantic division and surged 7.6% in the Mountain division. (Reporting By Lucia Mutikani; Editing by Andrea Ricci)