Money you invest in an RRSP grows tax deferred until you withdraw it. You receive a tax deduction for any funds you contribute to the plan. All investments within an RRSP account grow tax deferred. In other words, any profits made on investments within an RRSP account in the form of interest, dividends or capital gains are not immediately taxable to you as income.
However, if there is a loss on the investment, the Canada Revenue Agency does not allow you to treat it as a capital loss against your RRSP. It is simply a loss and can’t be deducted.