The U.S. leading economic index grew a softer 0.2% in September and pointed toward somewhat slower growth, the Conference Board said Thursday."The U.S. LEI rose again in September, though at a slower rate, suggesting the economy remains on a more moderate growth trajectory compared to the first half of the year," said Ataman Ozyildirim, director of business cycles research at the board. "The delta variant, rising inflation fears, and supply chain disruptions are all creating headwinds for the US economy." The index had increased 0.8% in August and 0.9% in July. The LEI is a weighted gauge of 10 indicators designed to signal business-cycle peaks and valleys.