The GovConIndex fell to 63.713 – down 0.821, or 1.306 percent.
The U.S. stock market responded negatively to concerns over an ailing global economy and weak data from Germany.
German industrial output slid 4 percent in August, the biggest fall in five-and-a-half years.
The Executive Mosaic GovConIndex is a composite index that tracks 30Â of the largest publicly-traded Government Contracting (GovCon) Companies.
