US 10-year at 24-year High: Upward Discount Rate Pressures Long-Dated African Eurobonds

US 10-year yields trading near multi-decade highs have lifted the global risk-free discount rate and rerated duration risk. That repricing raises the present value discount applied to long-dated paper and increases term premia for sovereign and corporate borrowers globally. For African external issuers, the mechanical effect is heaviest in the long end of curves: Ghana 2034/2042 and Zambia 2034s and other maturities with elevated duration face the biggest markdown to price as investors demand higher yields to offset a higher US curve.

The transmission runs through two channels. First, higher US yields raise the benchmark used to price EM spread compensation, so African Eurobond spreads can widen even without domestic news; long-duration issues therefore see the largest spread widening and convexity losses. Second, higher global funding costs raise refinancing premiums for sovereigns with imminent amortisations and corporates rolling FX debt, tightening issuance windows and reducing primary market capacity — a direct hit to credits reliant on external markets to refinance, such as mid-term Ghana and Zambia maturities.

Against regional peers, lower-beta credits with shorter external curves — Ivory Coast and Morocco sovereigns with shallower long-end exposure — should be relatively less sensitive than high-duration credits like Ghana or Zambia. The desk will watch pockets of concentrated amortisation in the 2028–2036 window across African borrowers: clustered external redemptions will amplify the discount-rate shock into realised funding stress.