I would not have expected the mineral resource increase upgrade...

I would not have expected the mineral resource increase upgrade to have much impact on the share price - it was expected and should have already been factored into the price. On my reading, the annoucement said that although there is the same amount of gold in the ground as thought before, more of it is now commercially viable to mine (becauase of the high price of gold). The resource did not so much as increase (as we would expect from new drilling results) as become more commercially profitable. But everybody knew that a higher price of gold would reduce the cut-off grades and increase the amount they dig up (ie it was expected).

Correct me if i'm wrong?