US 10y/30y Yields Jump to Multi‑Decade Highs: Duration Squeeze Hits Long-Dated African Eurobonds

U.S. Treasury yields moved higher on 8 October 2026, with the 10-year and 30-year trading at multi‑decade highs as markets digested strong long-dated issuance and central-bank commentary. The increase directly lifts global risk‑free discount rates and real yield anchors, repricing duration across emerging-market external debt. For African sovereigns, the mechanics are clear: long-dated Eurobonds suffer the largest price impact through higher discount rates and duration-driven PV losses.

Credits with long-dated payoffs—examples include Mozambique’s 2031 Eurobond—experience spread widening as investors demand compensation for higher absolute yields and convexity risk. Higher US rates also strengthen the dollar, tightening FX-adjusted debt-service ratios for countries with significant external maturities and reducing appetite for new issuance; corporates reliant on cross‑border funding face higher hedging and rollover costs.

This move separates long-duration, high-beta sovereigns from shorter-dated or domestically-funded borrowers. Credits with concentrated near-term amortisations (e.g., Nigeria’s 2027–2030 maturities) feel pressure through higher refinancing costs but less through duration than the ultra-long lines. Reserve-constrained sovereigns and those with large FX deficits are more vulnerable to a simultaneous dollar appreciation and higher global yields. The desk will watch primary long-dated issuance acceptance and changes in secondary liquidity for benchmark long maturities.

A series of weak long auctions in Europe/US or a persistent dollar rally would extend pressure into African long-dated benchmarks and increase the cost of external borrowing for duration-heavy sovereigns and corporates.