Community Q&A
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How do I account for increasing-rate preferred stock where the dividend escalates over time?
Use a constant effective yield to spread IRPS dividends. The difference between effective and cash dividends accretes carrying value and reduces EPS for common shareholders.
Why does uncovered interest parity fail empirically?
UIP fails because risk premia, peso problems, and expectational errors mean high-rate currencies tend to appreciate rather than depreciate as theory predicts.
What happens when a company modifies outstanding stock options?
Modifications add incremental fair value (post-mod minus pre-mod) amortized over remaining vesting. Cascade Software reprice example adds $3.73M/year.
How do I build a duration-neutral fixed income portfolio while taking credit bets?
Duration-neutral construction sizes positions so DV01s offset. Oravine Credit Fund pairs long $100M HYG with short $29.76M LQD for isolated 292bp DTS exposure and 5.7% net carry...
What are unrecognized tax benefits under FIN 48 and how do they affect reported earnings?
UTBs represent the tax benefits claimed on returns but not recognized in financials due to uncertainty; reversals boost EPS, settlements impact cash.
How does the White test detect heteroskedasticity without assuming its form?
Heteroskedasticity means the variance of regression errors varies across observations. It does not bias coefficient estimates but it invalidates standard errors.
Can goodwill be partially impaired under IFRS?
IFRS tests goodwill at CGU level. Partial goodwill method requires grossing up goodwill for testing but only parent's share flows through P&L.
How do I interpret non-cash working capital changes when analyzing cash flow quality?
NCWC = (AR + Inv + Prepaid) - (AP + Accrued). Growth-matched changes are healthy; sudden jumps vs flat revenue warn of earnings trouble.
How is logistic regression used for default prediction and how do I interpret coefficients?
Logistic regression models log-odds of default linearly. exp(beta) gives odds multiplier per unit of predictor. PD recovered via the sigmoid.
What is the end-to-end scorecard development process for credit risk?
Eight steps: sampling, data prep, binning, attribute selection, logistic regression, points scaling, validation, deployment and monitoring with PSI.
How do you assess risk culture in an organization — isn't it too intangible?
Risk culture is measurable via surveys, behavioral KRIs, committee dynamics, and compensation alignment — it's a leading indicator of future risk events.
How do you identify and exploit option bound violations?
Violations exploited by buying undervalued options + hedge, or selling overvalued options + hedge...
What are the upper bounds on call and put prices?
Call upper bound: c <= S. European put: p <= K*e^(-rT). American put: P <= K...
What is IRRBB and how do regulators measure it?
Interest rate risk in the banking book (IRRBB) measures the sensitivity of a bank's non-trading balance sheet to interest rate movements.
How do contract size and notional value relate in futures?
Contract size is the exchange-defined quantity of the underlying per contract. Notional value is contract size times current price — the economic exposure you carry.
What are the key specifications I need to know for a futures contract?
Futures contract specifications are the standardized terms the exchange defines so every contract is fungible. Six elements matter most: underlying asset, contract size, delivery month, price quotation, tick size, and delivery terms.
What is Fitch's approach to corporate ratings and how is it different from Moody's/S&P?
Fitch publishes 'Navigator' rating reports for each issuer — a one-page visual scorecard showing how key factors map to the rating. The framework uses four pillars similar to S&P: Sector Risk Profile, Operating Environment, Company Profile, and Financial Profile...
What is contraction risk and why does it hurt MBS investors when rates drop?
Contraction risk is accelerated principal return when rates fall and borrowers refinance. Reinvestment at lower yields caps the MBS's upside, creating negative convexity.
Why do interest rate models use trinomial trees instead of binomial?
Trinomial trees add a third branch at each node, giving more flexibility for matching mean-reverting dynamics common in interest rates...
What's the best way to estimate realized volatility from high-frequency data?
Each estimator trades bias against variance and microstructure noise. Close-to-close is unbiased but noisy; Parkinson uses daily high-low and is 5x more efficient.
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