In a securitization structure, default probabilities and default correlations have a direct impact on credit risk. Default probabilities refer to the likelihood of borrowers defaulting on their obligations, while default correlations measure the relationship between the default probabilities of different borrowers or assets within the securitization. Higher default probabilities indicate a greater likelihood of default, which increases the credit risk in a securitization. Similarly, higher default correlations imply that the defaults of different borrowers or assets within the securitization are more closely related. When default correlations are higher, credit risk increases as a default in one borrower or asset is more likely to result in defaults in other borrowers or assets. Therefore, both higher default probabilities and higher default correlations increase credit risk in a securitization.

Choice B is incorrect. While higher default probabilities do decrease credit risk, lower default correlations do not necessarily decrease credit risk. Default correlations can have either a positive or negative impact on credit risk, depending on the specific circumstances of the securitization.

Choice C is incorrect. Higher default probabilities do increase credit risk, but higher default correlations do not decrease credit risk. Default correlations can either increase or decrease credit risk depending on the specific securitization structure.

Choice D is incorrect. Higher default probabilities do decrease credit risk, but higher default correlations do not necessarily increase credit risk. The impact of default correlations on credit risk depends on the specific circumstances of the securitization.

Things to Remember

• Default probabilities and default correlations are key factors that affect credit risk in a securitization.
• Higher default probabilities indicate a greater likelihood of default and increase credit risk.
• Higher default correlations imply that the defaults of different borrowers or assets within the securitization are more closely related and increase credit risk.