The Federal Reserve Bank of Chicago released its National Activity Index on Friday. The index increased to -0.22 in December from -0.36 in November. November's figure was revised down from -0.30.
The slight increase was mainly driven by a rise in the production.
The production-related indicator rose to -0.26 in December from -0.40 in November.
The employment-related indicator remained unchanged at 0.12 in December.
The personal consumption and housing indicator was down to -0.07 in December from -0.05 in November.