The correct answer is D. Issuer’s credit rating. The Investment Funds in Canada course emphasizes that principal protected notes (PPNs) are structured products whose principal protection depends entirely on the creditworthiness of the issuer.

Unlike guaranteed investment certificates (GICs), PPNs are not insured by CDIC. The principal protection is only as strong as the issuer’s ability to meet its obligations at maturity. If the issuer defaults, the investor may lose some or all of their principal, regardless of the performance of the underlying investment.

While maturity length, cost, and asset exposure are relevant considerations, none override the importance of the issuer’s financial strength. The CIFC text clearly warns investors that “principal protection is subject to issuer credit risk,” making credit rating the single most critical factor.

Asset allocation applies to portfolio construction, not to assessing PPN safety. Cost and maturity affect liquidity and return potential but do not determine whether the principal will actually be protected.

Therefore, when selecting a PPN, evaluating the issuer’s credit rating is paramount, making Option D the correct and fully CIFC-aligned answer.