Well, what you mean is that you are now only down 750. Once you have accrued a total of 850 in obc, you will be even. Any obc after that and you will be "up", assuming of course that the shares are then not worth less than 850, in which case, you will still be "down".
You also have to think where else you could have invested your 850. If you had bought some dividend earning stock in a company in a less parlous state than CCL, paying, say, 5% pa, over two years you woukd have earnt $90 or so. That again has to be taken into account when determining if you are up or down.