Homebuilders and real-estate agents were probably busier in September, and the index of leading indicators increased, adding to evidence the next U.S. expansion has begun, economists said before reports this week.

Construction started last month on 610,000 houses at an annual rate, the most since November, according to the median forecast of 53 economists surveyed by Bloomberg News before an 20 Oct Commerce Department report. Sales of existing homes rose to a two-year high and the gauge of the economy’s future course advanced for a sixth month, other reports may show.