The ratings agency Moody’s has downgraded South Africa’s sovereign debt rating.
The move comes after similar downgrades from Fitch and Standard and Poor’s.
The South African economy has been struggling of late, amid industrial action on the platinum mines earlier this year and recent electricity blackouts.
South Africa’s economy narrowly avoided recession in the first half of the year.
Moody’s downgraded South Africa one notch to Baa2, just two notches above “junk status”.
While South Africa retains an investment grade, Moody’s said its decision was based on “poor medium-term growth prospects due to structural weaknesses, including ongoing energy shortages as well as rising interest rates”.
Earlier this week, the state-run electricity generator, Eskom, announced the possibility of rolling blackouts, after a coal silo collapsed at a power station in the east of the country.
Last month, South Africa’s finance minister, Nhlanhla Nene, slashed this year’s growth forecast for the economy to 1.4%, down from a previously forecast figure of 2.7%.