Exactly, so what it says is if you have 10.000 loss on share-A, and 10.000 capital gain on share-B, then you can set the loss against your gain and not pay tax on that 10k of income. I.e., purely for the share-A you still lose the 10.000 but gain a "tax credit" worth some % [whatever your rate is] of that. A common misunderstanding is that you'd get "tax credit" of 10.000, which you don't.