US 10y/30y Climb to Multi‑Year Highs: Long‑End African Eurobonds Take Duration Hit

US Treasury long yields moved higher in late September 2026, with the 10‑year trading above ~5.2% and the 30‑year near 5.50%, as markets priced a higher‑for‑longer Fed and stronger real yields. The move concentrated in the belly and long end of the US curve, extending the September rise in global risk‑free rates. Higher US long yields lift the discount rate applied to African dollar paper and increase the financing hurdle for new issues.

Long‑dated Eurobonds — 10y+ tranches from Ghana, Nigeria and Egypt and extended maturity sovereigns such as Angola’s and Zambia’s dollar curves — are most exposed through duration: a parallel rise in US rates mechanically pushes their yields higher and raises spread compensation demanded by investors. Dollar‑denominated corporates with long amortisation schedules will see a higher refinancing premium and greater external debt‑service pressure where coupons and rollovers are dollar sensitive.

The move disadvantages higher‑beta SSA credits relative to lower‑beta issuers such as Morocco or South Africa, whose local policy room and external buffers reduce acute duration transmission. Issuers with credible IMF programmes or recent par access (for example Ghana if programme signals hold, or Egypt relying on sizeable official support) may see smaller spread widening than out‑of‑programme peers because programme credibility limits risk premium expansion.

The desk watches two conditional points: whether US real yields continue to repricing higher across 10y–30y (which would steepen pressure on long African paper) and whether primary issuance windows for 10y+ African Eurobonds begin to close as investors re‑price duration demands.