U.S. 10-Year Yield Reaches 19-Month High: Duration Pressure Returns To African Eurobonds

The U.S. 10-year Treasury yield rose to approximately 4.76%-4.78% on September 1, its highest level since January 2025, while the two-year yield also moved higher as markets repriced expectations for tighter Federal Reserve policy. Higher oil prices, renewed U.S.-Iran hostilities and renewed inflation concerns were cited as drivers of the move, extending the global bond-market selloff beyond the long end of the U.S. curve.

For African hard-currency debt, the transmission is direct: the Treasury move raises the risk-free discount rate applied to sovereign and corporate Eurobonds. Long-dated Ghanaian and Kenyan Eurobonds carry the greatest duration sensitivity, while lower-rated African issuers would also face a higher refinancing premium if their spreads widen alongside the benchmark. The result is a weaker pull-to-par cushion and less flexibility for issuers approaching external debt maturities or primary-market funding needs.

The currency channel can reinforce the credit effect. If higher U.S. yields support the dollar and weaken African currencies, local-currency external debt service becomes more expensive and imported inflation pressures can increase. That combination is more adverse for sovereigns with constrained reserve adequacy than for stronger regional credits, because it can raise both the local-rate burden and the hard-currency return required by investors.

The key conditional for African spreads is whether the Treasury move remains a benchmark repricing or develops into a broader risk-off episode. Persistence alongside wider emerging-market spreads or weaker African currencies would transmit most forcefully into long-dated sovereign and corporate Eurobonds; a stabilisation in spreads would leave duration as the primary source of pressure.