A measure of future U.S. economic growth was little changed in the latest week, while the annualized growth rate fell to its lowest level in more than a year, a research group said on Friday.

The Economic Cycle Research Institute, a New York-based independent forecasting group, said its Weekly Leading Index inched up to 120.4 in the week ended Oct 14 from 120.0 the week before. That was originally reported as 120.2.

The index's annualized growth rate sagged to minus 10.1 percent from minus 9.7 percent. It was the lowest level since late July 2010.