When a company's cash flows come from an emerging market, using a domestic WACC to discount them is one of the most common mistakes candidates make in valuation interviews — and one of the fastest ways to lose credibility with an interviewer. The country risk premium (CRP) exists to fix this: it's the extra return equity investors demand for the added risk of operating in a specific country, layered on top of a standard CAPM cost of equity.
Why a Domestic CAPM Isn't Enough
The Capital Asset Pricing Model (CAPM) — Cost of Equity = Risk-Free Rate + β × Equity Risk Premium — was built around a single, well-developed market. It captures systematic risk as priced by investors in that market, but it has no mechanism for pricing political instability, currency controls, weaker property rights, or the general volatility that comes with operating in a less mature economy. Apply a US or European CAPM cost of equity to cash flows generated in an emerging market, and you're implicitly assuming the two markets carry identical risk — which they don't.
How the Country Risk Premium Is Estimated
The most widely used approach (associated with Aswath Damodaran) starts with a country's sovereign bond spread — the extra yield investors demand on that country's USD-denominated government debt over US Treasuries, a direct market signal of default risk. But equity is riskier than sovereign debt in almost every market, so the bond spread alone understates what equity investors require. The fix is to scale it by the ratio of the country's equity market volatility to its bond market volatility:
Country Risk Premium = Sovereign Bond Spread × (Country Equity Volatility / Country Bond Volatility)
A sovereign spread of 2.5% and an equity-to-bond volatility ratio of 1.3x, for example, produces a country risk premium of roughly 3.25% — added directly on top of the base CAPM cost of equity, not blended into the risk-free rate or the beta.
Two Adjustments Interviewers Expect Alongside the Country Risk Premium
The country risk premium rarely shows up alone in an interview question. Two related adjustments usually come with it:
Currency mismatch. If the cash flow forecast is built in local currency but the cost of equity was derived using a USD risk-free rate, the discount rate and the cash flows are speaking two different currencies. The fix is a Fisher relation adjustment that re-expresses the discount rate in the cash flows' currency, using the inflation differential between the two currencies. Skipping this step — discounting local-currency cash flows at a USD-denominated rate — is one of the most common errors candidates make, because the two numbers look similar in size but are quietly measuring different things.
Illiquidity. Emerging-market subsidiaries or privately held targets often lack a liquid public market for their equity, so a further illiquidity premium is added to compensate investors for the difficulty of exiting the position.
A full walkthrough of these three adjustments — country risk, currency, and illiquidity — stacked into a single fully adjusted WACC is worked step by step in International WACC, including the exact formulas and a completed numerical example.
Where This Fits in a Broader WACC Interview
Country risk is one of several adjustments interviewers layer onto a base WACC to test whether a candidate understands the assumptions behind the number, not just the formula. A related and equally common variant asks what happens to WACC when a company's capital structure changes rather than its geography — unlevering and relevering beta using the Hamada equation, covered in WACC with Leverage. Interviewers sometimes combine both angles: first adjust for country and currency risk, then ask how the answer would change under a different debt/equity assumption.
Understanding why each adjustment exists — not just how to plug in the formula — is what separates a candidate who memorized WACC from one who can defend it under follow-up questions.