It is, but it's also more politically explosive. The upshot is that CGT loopholes are extremely prevalent. Both succeed/fail in the same way, marking to market

It is, but it's also more politically explosive. The upshot is that CGT loopholes are extremely prevalent. Both succeed/fail in the same way, marking to market. Apple Inc, the publicly traded entity, is able to deny its income for tax purposes (they say they paid this money to an irish subsidiary), while claiming it on behalf of their shareholders. The CGT version of this is unrealised gains.