The US economy grew in the third quarter for the first time in a year, beating market expectations, as consumer spending and new home-building rebounded, signaling the end of the worst recession in 70 years.

The Commerce Department, in its first estimate of third-quarter gross domestic product on Thursday, said the economy grew at a 3.5 per cent annual rate, the fastest pace since the third quarter of 2007, after contracting 0.7 per cent in the April-June period.

The growth pace in GDP, which measures total goods and services output within US borders, was above market expectations for a 3.3 per cent rate. The economy last grew in the second quarter of 2008.

"Better than expected GDP is confirming that the Great Recession has ended," said Kevin Flanagan, fixed-income strategist for Global Wealth Management at Morgan Stanley in Purchase, New York.

"The question going forward is, is this more of a statistical recovery or are we going to get some meaningful momentum on a sustained basis."

US stock index futures prices rose after the economic data. The dollar rose against the yen, and US government debt prices extended their decline on the better-than-expected reports.

Recessions in the United States are dated by the National Bureau of Economic Research and the private-sector group often takes months to make determinations. The economy slipped into recession at the end of 2007 and has been in the worst downturn since the Great Depression of the 1930s.

The third-quarter recovery was generally broad-based, with solid gains in consumer spending, exports and home construction.

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