That charge was taken due to the drop in POG against estimated lifetime value of the mines/assets. So, yes it can drop again if POG drops substantially, but it can also go the other way as POG increases. IF POG had increased back over $1,200, we could see that $50 million come back in the Q3 financials as profit. It is all just on paper of course, as true profit comes from the actual sale of the gold not just leaving it in the ground.
In case I forgot to mention it above, Always Just My Opinion