The talks prompted the ANC's National Executive Committee, its top decision-making body, to postpone a special meeting called for Wednesday to decide whether to force Zuma from office. Parliamentary speaker Baleka Mbete told eNCA television that she expects progress in Zuma's discussions with Ramaphosa during the day.
"The worst-case outcome is a drawn-out multi-month saga in which Zuma refuses to go and the ANC fails to commit to an impeachment or vote of no confidence, but we are not there yet and we judge the probability of this to be low at this time," said Frans Cronje, chief executive officer of the South African Institute of Race Relations.
Zuma's expected departure has been cheered by many investors who welcome Ramaphosa's pledges to bolster growth and clamp down on graft. Business confidence rose to its highest level since October 2015, amid expectation that the new leadership will implement more pragmatic and predictable policies, the South African Chamber of Commerce and Industry said on Tuesday.
The rand has been the best performer in the world against the dollar since Ramaphosa's Dec. 18 election as ANC leader. It was 0.2 percent weaker at 11.9430 per dollar at 10:23 a.m. in Johannesburg Wednesday.
Waning Power
The ANC's former head of intelligence, Zuma took power in May 2009 and clung to office through a series of scandals with the aid of his allies who controlled most key positions in the party and government. Under his rule, the ANC suffered its worst-ever electoral performance in a municipal vote in August 2016 when it lost control of Johannesburg, the economic hub, and Pretoria, the capital.