Standard Bank's share price jumped just short of five percent on Tuesday following the release of a cautionary saying the group was in negotiations that could have a material effect on the price of its shares.
According to the bank, shareholders need to exercise caution when dealing in the group's ordinary shares until a further announcement is made.
"It is anticipated that a further announcement will be made by the end of this week, 26 October 2007," the bank said.
As it is, Standard Bank has made acquisitions across Africa, and currently has representation in 18 African countries, and a further 19 outside of Africa.
It also bought BankBoston in Argentina in April this year, giving it further access to the South American market.
By early afternoon, the shares had gained 4.8 percent, to trade at 110.55 rand.
The group?s share price closed 3.75 percent higher at 109.45 rand.