US house prices in biggest annual rise for seven years.

Graph of housing market

US house prices rose 12.4% over the 12 months to the end of July, the biggest annual increase since February 2006, according to a closely-watched measure.

The rise was revealed in the latest S&P/Case-Shiller Home Price Index.

The index measures single-family home prices across 20 cities, with 13 cities showing a rising annual growth rate.

Last week, the US Federal Reserve decided to maintain its effort to boost the economy, which involves buying $85bn worth of assets every month.

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