JOHANNESBURG, May 18 (Reuters) - Ghana is targeting $10.5 billion of external debt service relief from 2023-2026, the IMF said, giving an early indication of how large a hit investors might face in an impending debt overhaul. "Our back-of-the-envelope calculations suggest that this translates to a 40%-50% haircut on external debt, if there is not further restructuring of domestic debt," Bojosi Morule, an economist at Goldman Sachs, said in emailed reaction to the DSA. Ghana's already strained finances buckled under the fallout of COVID-19 and Russia's invasion of Ukraine and it is now seeking to restructure $20 billion of its roughly $30 billion external debt, including about $13 billion of Eurobonds, under the Group of 20's Common Framework platform. Earlier this year it completed a domestic debt exchange. Other risks include Ghana not regaining market access to issue debt and the domestic debt exchange posing dangers to financial sector stability, the IMF said.

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