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What is the CMBS B-piece and why is it a specialized market?
The B-piece is the first-loss subordinate class in a CMBS, bought by specialized investors who kick out weak loans pre-close and typically name the special servicer.
What is tail correlation and why differ from normal correlation?
Pearson correlation measures linear co-movement averaged across all observations. Tail correlation captures co-movement conditional on extreme returns...
What is a par equivalent CDS spread and why do practitioners use it?
PECS is the single running coupon making a CDS zero-PV today, translating the post-2009 standard fixed-coupon-plus-upfront quote into a comparable par spread. A 4.2pt upfront plus 100bp running might equal roughly 192bp par spread.
How is a CDS spread decomposed into its components?
CDS spread equals expected loss plus risk premium plus liquidity premium. A 210bp spread on Vanora Logistics might be 120bp expected loss, 60bp risk premium, 30bp liquidity. Risk-neutral PDs are typically 2-4x physical PDs for IG.
How should models be tiered for validation priority?
Tier classification scales validation effort to model risk. Tier 1 (high) gets annual full revalidation; Tier 2 biennial; Tier 3 triennial light-touch. Scored across impact, reliance, complexity.
What are soft dollar standards, and when do they create an ethical problem?
Soft dollars use client commissions to pay for research and services. They are permissible only when the services directly benefit clients' investment decision-making process, are properly documented, and disclosed to clients.
Can someone apply Porter's Five Forces to a real industry? I need a concrete example.
Let's analyze the commercial airline industry using all five forces. It's one of the most illustrative examples because nearly every force works against profitability, explaining historically low returns on capital.
How does a compound option work, and how are they priced?
Compound option = option on option. Call-on-call hedges only if a contingent event occurs. Cheaper than vanilla, used in M&A and real options.
How do I allocate purchase price across acquired assets and liabilities?
Purchase price allocation distributes consideration across identifiable assets and liabilities at fair value on acquisition date, with the residual becoming goodwill. Hierarchy: tangible assets, intangibles, liabilities, deferred tax, NCI, goodwill residual...
What are the steps in the Box-Jenkins methodology for ARIMA fitting?
Box-Jenkins methodology consists of three iterative stages: identification via ACF/PACF, coefficient estimation, and residual diagnostic checking.
How do ARIMA models forecast financial time series?
ARIMA(p,d,q) combines autoregression of order p, differencing of order d, and moving average of order q to forecast non-stationary time series.
What is the local outlier factor and when should I use it?
LOF scores anomalies by comparing a point's local density to its neighbors'; catches contextual outliers that global methods like isolation forest miss.
What is Cash Value Added (CVA) and when should I use it?
Cash Value Added (CVA) replaces accounting earnings with operating cash flow to strip out non-cash distortions.
How do I derive the no-arbitrage price of a currency forward?
The way to never forget which rate goes on top is to think of the forward as the outcome of two equivalent arbitrage portfolios.
How can I decompose a plain-vanilla interest rate swap into a series of FRAs?
The decomposition is elegant and worth understanding because it makes swap valuation intuitive. A plain-vanilla pay-fixed, receive-floating interest rate swap exchanges cash flows at multiple reset dates.
What is the supply-side ERP methodology (Ibbotson-Chen)?
Ibbotson-Chen supply-side ERP decomposes returns into inflation + real EPS growth + P/E expansion + dividend yield, then strips out unsustainable P/E expansion. Historical 6.5% becomes ~6% supply-side, ~3-4% forward...
How is factor-based asset allocation different from traditional asset class allocation?
Factor-based allocation looks through asset classes to the underlying risk factors driving returns — growth, interest rates, credit, inflation, liquidity, value, and momentum. A portfolio that looks diversified across asset classes may actually be a concentrated bet on a single factor like economic growth.
When do I use market, cost, and income approaches for fair value?
Market approach for comparable-price assets, cost approach for specialized replaceable assets, income approach for cash-flow-generating assets. Prefer observable inputs and multiple techniques when possible.
How do I do factor-based performance attribution?
Decompose excess return into β_k × factor_return_k contributions plus residual alpha from stock selection.
How do I account for jointly controlled assets such as shared pipelines?
Jointly controlled assets are a subset of joint operations. Each party recognizes its share of the asset by its nature, its own liabilities, jointly incurred liabilities, output income, and shared expenses...
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