Why is DDG (short oil and gas) down when USO and oil are down?

Can someone please explain to me why the -100% daily short oil/gas position, DDG, is down 0.90% when USO is down 1.93%? Isn't it supposed to perform the inverse?

Submitted February 04, 2016 at 02:27PM by flextronics123 http://ift.tt/1VRoOFo