The rand was volatile as it anticipated Tuesday's release of data on the current-account deficit.
Bonds rose on news that retail sales missed estimates, encouraging speculation that interest rates will remain unchanged for longer.
The rand has slumped to the weakest level in two and a half months against the dollar as a bond sell off reached the longest streak since May.
The retailer has thrown in the towel after several failed attempts to improve performance in the north African country.
The Reserve Bank seeks to diversify its currency exposure to help protect reserves from a potential rise in US Treasury yields.
The rand dropped 1.4% in the past few days as strikes at platinum mines continue.
Fitch has lifted Transnet's long-term foreign-currency rating two levels to BBB, its second-lowest investment-grade level, with a stable outlook.
South Africa's debt will make up 48% of the gross domestic product in the medium term, a pace which one economist describes as "frightening".
The US debt limit argument has seen the rand soften for the first time in five days.
As the rand weakened for the first time in three days against the dollar, economists expect a report will show manufacturing growth slowed in August.