Eric Miller/Reuters
A Dallas Cowboys fan wears a giant helmet before the Cowboys play the Minnesota Vikings in their NFL Divisional playoff football game in Minneapolis, Minnesota, January 17, 2010.
Economists expect that the general business activity index improved to -10.0 from -18.3 in June, according to the Bloomberg consensus.
Last month, the index fell to -18.3, more than expected.
The headline activity index has not turned positive since December 2014.