Duluth metals as far as I remember only has very low grade Ni and Cu. I wonder if they found some new stuff or if this increase in SP is due to other news and expectations.
With 0.2%Ni and 0.6%Cu I do not see any future for a very long time. The slag Vale Inco dumps from their furnaces contain that or more value of nickel, copper and cobalt.
I hope VMS has more future than that!