US 10-year at multi-decade highs: Long‑dated African Eurobonds and importers most exposed

US 10‑year yields climbed to multi‑decade highs in early October, initiating a sustained sell‑off in global government bonds and lifting the global risk‑free discount rate. For African hard‑currency debt this primarily transmits via duration and push‑to‑par: long‑dated Eurobonds see larger present‑value losses as higher US yields raise the discount factor and increase required spread compensation.

Credits with extended maturities and thin secondary liquidity — Ghana’s long curve, Zambia’s outer maturities and long‑dated South African paper — are mechanically more exposed than short‑dated notes. Higher Treasury yields also raise global funding costs and the refinancing premium. Sovereigns and corporates with imminent external amortisations face wider new‑issue spreads; Mozambique and Ghana, which rely on regular external placement to roll maturities, will need higher coupons to restore demand.

Banks and corporates funding in dollars will price that cost into domestic curves, steepening local yield curves where central banks do not offset via policy easing. Carry‑sensitive oil exporters and importers will diverge. Angola and Nigeria (despite Nigeria’s subsidy and FX pass‑through complexities) are comparatively insulated by commodity receipts relative to small‑reserve importers such as Kenya and Ivory Coast, where higher global rates amplify external refinancing risk and raise the real domestic rate needed to defend currencies.

The net effect is likely spread widening concentrated in long duration segments of higher‑beta sovereigns and quasi‑sovereigns. The desk will watch US yield direction and US fiscal signals as the conditional trigger for further widening: a persistent upward path in US yields tends to force duration reappraisal and pushes risk premia on long African paper higher.