A spokeswoman for Ramaphosa had said on Wedndesday that he was "favourably disposed" to a trade union proposal to use funds from a state-owned asset manager to reduce the debt of Eskom, which generates more than 90% of the country's electricity.

The firm's 2023- to 2028-maturing bonds were last up between 1 and 1.8 cents on the dollar.

(Reporting by Marc Jones; Editing by Tom Arnold)