Community Q&A
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CFA Level II Updated
What are the custody challenges for digital assets, and how do institutional solutions differ from retail self-custody?
Digital asset custody is uniquely challenging because ownership depends on controlling cryptographic private keys, with no recovery mechanism for lost keys. Institutional investors use qualified custodians with cold storage, multi-signature governance, insurance, and SOC audits to mitigate operational risks that differ fundamentally from traditional securities custody.
How do you bootstrap spot rates from a par yield curve? I keep getting the wrong numbers.
Bootstrapping is mechanical once you see the pattern. The 1-year spot rate always equals the 1-year par yield. For subsequent maturities, you discount earlier cash flows at already-known spot rates and solve for the unknown longer-term spot rate.
What is a factor mimicking portfolio, and how do you construct one to isolate a specific risk factor?
A factor mimicking portfolio is a long-short portfolio constructed to isolate a single risk factor with unit exposure while neutralizing all other factor exposures. It transforms abstract factors into investable strategies whose returns estimate the factor risk premium.
How do event studies measure the market impact of special dividend announcements, and what do the findings typically show?
Event studies isolate the announcement effect of special dividends by measuring cumulative abnormal returns around the event date. Research typically finds positive CARs of 2-5%, larger than regular dividend changes because special dividends are entirely unexpected.
In what order is an impairment loss allocated to assets within a CGU under IAS 36?
Under IAS 36, CGU impairment losses are allocated first to goodwill (reduced to zero), then pro rata to other assets based on carrying amounts, with no asset written below the highest of its fair value less disposal costs, value in use, or zero.
How does Economic Value Added (EVA) measure true economic profit, and how does it relate to residual income?
EVA equals NOPAT minus the capital charge (WACC times invested capital), measuring whether a company earns above its full cost of capital. Positive EVA means value creation; negative EVA means value destruction. It refines residual income with specific accounting adjustments.
How does elastic net combine L1 and L2 penalties, and when does it outperform pure LASSO or ridge?
Elastic net blends L1 and L2 penalties using a mixing parameter alpha. It inherits LASSO's ability to zero out irrelevant variables while adding ridge's stability with correlated predictors, producing grouped selection that keeps or drops correlated variables together.
What is Schumpeter's creative destruction, and how does it explain why economies need firm failure to drive long-term growth?
Schumpeter's creative destruction explains how radical innovation renders entire industries obsolete while simultaneously creating new ones. Firm failure is productive because it frees resources for reallocation to more innovative uses, and policies preventing failure (creating zombie firms) reduce long-term growth by 0.5-1.0% annually.
What is a risk reversal strategy, and how does its payoff differ from a simple long stock position?
A risk reversal buys an OTM call and sells an OTM put to create a leveraged directional position without owning the underlying. Unlike long stock, it has a dead zone between strikes where neither option has value, and it serves as a key institutional sentiment indicator.
What is conversion arbitrage, and how does it exploit violations of put-call parity?
Conversion arbitrage exploits put-call parity violations by combining long stock, long put, and short call at the same strike. The combined position always pays K at expiry, so if the initial cost is below PV(K), you earn risk-free profit.
Why would an investor buy catastrophe bonds and what determines their risk-return profile?
Investors buy catastrophe bonds for their uncorrelated return profile (near-zero beta to financial markets), attractive spreads of 5-15% above risk-free rates, short duration, and transparent risk modeling. They serve as powerful portfolio diversifiers.
What are the actual benefits of cross-listing for a company, and does the evidence support a valuation premium?
Cross-listing provides benefits including an expanded investor base, improved liquidity, enhanced governance signaling through the bonding hypothesis, and greater analyst coverage. Evidence supports an initial valuation premium of 10-20% for emerging market firms, though it erodes over time.
How do you compare cash earnings to accrual earnings to assess financial statement quality, and what divergence patterns are red flags?
Comparing cash earnings (CFO) to accrual earnings (net income) reveals quality issues when persistent divergence appears. Key red flags include widening gaps over time, receivables growing faster than revenue, and net income rising while CFO declines.
What is the Sloan accrual ratio, and how does it help analysts assess earnings quality?
The Sloan accrual ratio measures the proportion of earnings from accruals versus cash. Higher ratios signal lower earnings quality because accrual-based earnings are less persistent and more susceptible to manipulation than cash-based earnings.
How does the Altman Z-score work as a tool for assessing financial distress, and how can analysts use it in earnings quality analysis?
The Altman Z-score combines five financial ratios (liquidity, profitability, efficiency, solvency, asset utilization) into a single bankruptcy prediction score. Scores above 2.99 indicate safety, below 1.81 indicate distress, and the grey zone between requires monitoring.
How do I use the hazard rate to calculate cumulative default probability over multiple years?
The hazard rate is the conditional probability of default in a given year. Cumulative default probability equals 1 minus the survival probability, where survival is (1-h)^t for constant hazard rates. The cumulative PD is always less than h times t due to the compounding effect on survivors.
How do you derive a justified EV/Sales multiple, and when is it more useful than EV/EBITDA?
The justified EV/Sales multiple equals the FCFF-to-Sales margin divided by the WACC-growth spread. Profit margin is the primary driver, explaining why high-margin software companies can trade at 10x+ sales while thin-margin retailers trade below 0.5x.
How do corporate spin-offs create shareholder value, and what is the conglomerate discount?
Spin-offs create value by eliminating the conglomerate discount, allowing each entity to be valued at appropriate industry multiples with focused management, better analyst coverage, and aligned incentives. Most spin-offs are tax-free to shareholders.
How does the Nelson-Siegel model describe the yield curve, and what do its parameters represent?
The Nelson-Siegel model uses three components: a level factor (β0) setting the long-term yield, a slope factor (β1) controlling the short-to-long spread, and a curvature factor (β2) creating a hump at medium maturities. The decay parameter λ controls where the hump occurs.
How is Credit VaR calculated for a bond portfolio and what does it represent?
Credit VaR is the unexpected credit loss at a specified confidence level, calculated as the difference between the worst-case loss at that percentile and the expected loss. Expected loss is priced into spreads; Credit VaR represents the capital buffer needed.
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