Executive summary
Frontier sovereign debt is routinely priced off a single headline spread, which bundles together three economically distinct risks: the probability that the issuer defaults, the risk carried by the currency of denomination, and the compensation demanded simply for holding an instrument that is hard to sell. This project builds a usable sovereign yield curve for markets where quoted bond prices are sparse and stale, then decomposes the resulting country risk premium into its credit, currency and liquidity components — so that an investor can tell which risk they are actually being paid to take.
Methodology
- Data construction. Assembly of primary and secondary market quotes for local-currency and hard-currency sovereign issues, with explicit handling of stale prices, thin maturities and irregular coupon structures — the practical obstacle that makes frontier curves hard to build in the first place.
- Curve fitting. Bootstrapping of zero-coupon rates where the maturity grid allows, and parametric fitting (Nelson–Siegel–Svensson) where it does not, with regularisation to prevent the sparse long end from driving the whole curve.
- Credit component. Extraction of a risk-neutral default intensity from hard-currency spreads over the matching risk-free curve, under a recovery assumption tested for sensitivity.
- Currency component. Isolation of the FX risk premium from the differential between local-currency and hard-currency curves, adjusted for covered interest parity deviations where forward markets exist.
- Liquidity component. Estimation of the residual liquidity premium from bid–ask spreads, turnover, issue size and price staleness, benchmarked against a matched liquid comparator.
- Validation. Out-of-sample repricing of bonds excluded from the fit, and stability testing of the decomposition across time and across recovery assumptions.
Risk premium decomposition by maturity
The interactive chart could not be loaded (the Plotly CDN is unreachable). The full analysis will be available in the PDF write-up.
Illustrative data — research in progress, results not yet final.
Working hypotheses
This project is ongoing. The points below are the hypotheses being tested, not settled conclusions — they will be revised as the empirical work is completed.
- The liquidity component is largest at the short end, where genuinely tradable paper is scarcest, rather than at the long end where intuition would place it.
- Credit and currency premia are not independent: fiscal stress and currency stress arrive together, so treating them as separable understates tail risk.
- A meaningful share of what is reported as country risk premium is compensation for illiquidity, which means it should not be applied wholesale as a discount-rate adjustment in valuation work.