United States - Chicago Fed National Activity : Diffusion was -0.09000 Index in February of 2024, according to the United States Federal Reserve. Historically, United States - Chicago Fed National Activity : Diffusion reached a record high of 0.87000 in April of 1978 and a record low of -0.89000 in September of 2008. Trading Economics provides the current actual value, an historical data chart and related indicators for United States - Chicago Fed National Activity : Diffusion - last updated from the United States Federal Reserve on April of 2024.