Free CAIA Level I Private Credit Practice Questions

A is correct. Mortgage REITs (mREITs) invest in mortgage-backed securities or directly in mortgage loans. They typically use leverage to amplify the net interest margin, which is the spread between the yield earned on their mortgage assets and the cost of their short-term borrowings.
Choice B is incorrect because acquiring and managing physical properties describes equity REITs, not mortgage REITs. Mortgage REITs hold debt instruments rather than real property.
Choice C is incorrect because purchasing and flipping distressed properties is a real estate trading or equity strategy, not the core business model of mortgage REITs, which focus on earning interest income from mortgage debt instruments.
Choice D is incorrect because while some specialty finance REITs may originate construction loans, the defining characteristic of mortgage REITs is investing in mortgage-backed securities or mortgage loans for spread income, not construction lending.

B is correct. Milestone-based lending structures the loan disbursement in tranches that are released as the borrower achieves specified milestones, such as revenue targets, product development goals, or securing additional equity funding. This reduces the lender's risk by ensuring capital is deployed only as the company demonstrates progress.
Choice A is incorrect because milestone achievement triggers additional funding, not repayment. Requiring full repayment at each milestone would be counterproductive to the purpose of venture debt.
Choice C is incorrect because milestone-based lending involves staged loan disbursements, not automatic debt-to-equity conversion. Warrants may provide equity exposure, but the loan itself remains debt.
Choice D is incorrect because while some venture debt terms may adjust modestly, milestone achievement does not reduce the interest rate to zero. The lender still requires compensation for credit risk through the interest coupon.

C is correct. The Gaussian copula model, which was the industry standard for pricing CDO tranches, assumes that the dependence structure between defaults follows a normal (Gaussian) distribution. This distribution has thin tails, meaning it assigns very low probability to scenarios where many assets default simultaneously. During the crisis, defaults clustered far beyond what the model predicted because real-world default dependence exhibits tail dependence (extreme co-movement during stress) that the Gaussian copula cannot capture. This caused catastrophic losses in tranches that had been rated investment grade.
Choice B is incorrect because the crisis-era problems were not caused by regulatory trading restrictions; CDO managers generally retained discretion to trade, but collateral values had deteriorated so severely that trading could not prevent losses.
Choice A is incorrect because while conflicts of interest existed in CDO structuring, the core model risk issue was the inadequacy of the mathematical framework for capturing correlated defaults, not deliberate mispricing.
Choice D is incorrect because while low interest rates affected excess spread over time, the acute crisis losses were driven by massive, correlated defaults that overwhelmed structural protections, not by the gradual erosion of excess spread from rate cuts.