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Why do mortgage-backed securities exhibit negative convexity and what does that mean for investors?
Negative convexity means that as rates fall, MBS prices rise less than expected because homeowners refinance and prepay their mortgages. The investor's upside is capped while the downside from rising rates is fully exposed, creating an asymmetric return profile.
What are the three main sources of model risk in VaR, and how can each one cause VaR to be wrong?
Model risk in VaR refers to the possibility that the VaR estimate is inaccurate because of flaws in how it is built, calibrated, or used. The three primary sources are incorrect model specification, incorrect parameter estimation, and implementation errors.
What is trade compression and why has it become so important in OTC derivatives markets?
Trade compression is the process of terminating redundant or offsetting derivatives trades and replacing them with a smaller number of trades that maintain the same net risk profile. It reduces gross notional, operational complexity, and capital requirements.
What does resolution planning require and how do recovery and resolution plans differ?
Recovery plans describe how banks restore themselves in stress; resolution plans describe how authorities would resolve a failed bank.
How does bail-in work and what is the creditor hierarchy during resolution?
Bail-in is statutory power to write down or convert liabilities following a strict creditor hierarchy to avoid taxpayer bailouts.
What active strategies do commodity hedge funds use to generate alpha?
Active commodity managers generate alpha through several distinct strategies, each exploiting specific inefficiencies that passive indices ignore...
How are catastrophe reinsurance layers structured for a hurricane-exposed insurer?
Cat towers stack layers by return period, with pricing declining higher in the tower but coverage protecting tail capital.
How does a callable swap work and why would an issuer pay for cancellation rights?
Callable swap = vanilla IRS + embedded Bermudan receiver swaption owned by fixed payer. Peakstone pays 20bp extra fixed for right to cancel after year 5, matching callable bond...
How do I calculate the benefit of close-out netting for a counterparty?
Netting benefit = gross positive MTM minus max(0, sum of all MTMs). For Farringham Meridian Trust with 140 trades, 22M net = $46M benefit (68% reduction). Legal enforceability is critical.
How does variation margin frequency affect residual exposure?
VM frequency sets the MPR floor. Daily (10-day MPR) vs weekly (20-day MPR) roughly cuts residual exposure in half due to sqrt-of-time diffusion. For Brightmoor Continental, moving to daily saves $3-5M in annual capital. Often regulatory-mandated.
Why is the central limit theorem such a big deal? How does it apply to investment analysis?
The Central Limit Theorem states that sample means approach a normal distribution as sample size increases, regardless of the population's shape. This is the foundation for hypothesis testing and confidence intervals in finance.
How do operating and finance leases differ for both the lessee and the lessor at CFA Level II?
Level II adds lessor accounting to the lease analysis framework. Sales-type leases recognize selling profit at inception, direct financing leases defer the profit, and operating leases keep the asset on the balance sheet. Classification choice affects income timing.
How are goodwill and intangible assets recognized, amortized, and tested for impairment?
Goodwill arises only from business acquisitions as the excess of purchase price over fair value of net identifiable assets. It is not amortized but tested annually for impairment. Other intangibles may be finite-life (amortized) or indefinite-life (not amortized, tested annually).
What are the key GIPS compliance requirements for investment firms?
GIPS compliance requires firms to include all discretionary fee-paying portfolios in composites, use time-weighted returns, present at least 5 years of performance, disclose fees, and maintain composite integrity — without cherry-picking portfolios.
How is net income allocated between the parent and noncontrolling interest after an acquisition?
Net income is allocated after adjusting the subsidiary's reported income for fair value amortization of step-ups on PP&E, intangibles, and inventory. The adjusted net income is then split based on ownership percentages between the parent and NCI.
What is a Transformer model and why did it replace RNNs in most NLP tasks?
Transformer uses self-attention instead of recurrence. Q-K-V dot product with softmax. Parallelizable, captures long-range dependencies.
How are common control transactions accounted for and why are they different?
Common control transactions (entities under same ultimate parent) are scoped out of IFRS 3 and ASC 805. US GAAP uses predecessor basis (historical book values, no goodwill, differences through APIC). IFRS has no specific standard — predecessor basis is common practice...
How does downside risk optimization differ from mean-variance?
Downside risk optimization uses lower partial moments, semivariance, CVaR, or Sortino objectives, penalizing only negative deviations to align with loss aversion.
How is tracking error minimized in index replication?
Tracking error minimization uses full replication, stratified sampling, or optimization-based factor matching, trading off coverage accuracy against transaction costs.
How does momentum work in international equity markets?
International momentum has historically delivered higher premiums than US momentum (~8.2% vs 6.5%). Construction uses 12-month return ex-1-month with country/sector neutrality to isolate the factor.
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