A key measure of US economic performance gained in October, according to a private research group today, signalling that a broader recovery may be taking hold, dpa reported. The New York-based Conference Board"s Leading Economic Index added 0.3 per cent in October, after a 1-per-cent increase in September. The index, which gauges economic performance for the next three to six months, has climbed for six straight months. Ken Goldstein, an economist with the Conference Board, said the figures "indicate that economic recovery is finally setting in." The US economy grew by 3.5 per cent in the third quarter of 2009 according to initial government estimates, bringing the country out of its worst recession in seven decades.