The rand slumped overnight, moving above the R10-a-dollar level, and was early on Thursday morning trading at its worst levels since August 2002.
South African stocks were weaker at midday on Tuesday, weighed by falls in resources and miners amid lower commodities prices.
South African stocks were firmer at midday on Thursday as mining shares moved higher on improved precious metals prices due to the weaker US dollar.
SA stocks remained weaker at midday on Thursday, following the trend on global markets as banks and financials once again took centre stage.
South African stocks remained in the black at midday on Wednesday, buoyed by resources and mining stocks.
South African stocks remained in the red at midday on Tuesday as commodities stocks continued to weigh.
The JSE weakened further by midday on Tuesday as the overall market continued to be pressured by weakness in miners and resources.
The JSE remained firm on Monday as platinum mining and resources stocks posted good gains. Sentiment was positive, in line with global markets.
The rand weakened further on Friday morning as the dollar posted further gains against the euro.
After a weaker start to the session, the JSE turned around and was in positive territory by noon on Tuesday.