At 0615 GMT, the rand traded at 14.2975 per dollar, not far off its close of 14.3100 on Friday.

The currency weakened to a 4-week low of 14.3150 on Friday after Fitch downgraded the outlook for South Africa's sub-investment credit rating, citing increased support for struggling state firms such as the power utility Eskom among other factors.

On Thursday, Moody's said the government's proposal to provide additional financial support to Eskom was "credit negative" for the sovereign as it was a further drain on resources.

"Focus will now turn back to the U.S. Federal Reserve's interest rate announcement due on Wednesday, while the release of local employment figures and trade balance data this week may further add to the rand's volatility," Bianca Botes, a Treasury partner at Peregrine Treasury Solutions, said in a note.

Statistics South Africa will release second-quarter unemployment figures on Tuesday, while the revenue service will publish June trade balance numbers on Wednesday.

In fixed income, the yield on the benchmark government bond due in 2026 was flat at 8.36%.