The South African Reserve Bank and the Central Bank of Nigeria delivered sharply different monetary policy signals this month, exposing the widening gulf between Africa’s two largest economies as a global oil shock reshapes the continent’s inflation and growth outlook.
The SARB’s Monetary Policy Committee raised the benchmark repo rate by 25 basis points to 7.25%, effective 25 September, in a unanimous decision that caught markets off guard. One week earlier, the CBN held its Monetary Policy Rate at 23.00% but reset the standing facilities corridor to +50/-300 basis points around the MPR — an operational recalibration that the committee said does not signal a change in the underlying policy stance.
The contrast is stark: South Africa, a net oil importer, is tightening against the headwind of prices above US$110 a barrel on the back of the Strait of Hormuz closure. Nigeria, a net oil exporter, is holding at a record-high policy rate even as its inflation decelerates for the third consecutive month and its external reserves reach an 18-year high.
South Africa cuts growth, raises rates
The SARB cut its 2026 GDP growth forecast to 1.2% from 1.4%, blaming “geopolitical tensions, particularly conflicts in the Middle East and between Russia and Ukraine” for disrupting supply chains and oil and food flows. The central bank said global shocks “are clearly weighing on our economy.”
The downgrade comes on top of a second quarter contraction. SA’s economy shrank 0.2% in Q2 2026 after expanding 0.4% in Q1, with mining and manufacturing the weakest sectors.
The MPC warned that higher fuel prices will push inflation above 5% by late 2026 and early 2027 before it returns toward the 3% target by the end of 2027. The committee said the rate hike “aims to prevent current price shocks from translating into more persistent inflation.”
The SARB’s move reverses the rate-cut expectations that had been priced into markets earlier in the year. At 7.25%, the repo rate translates to a prime lending rate of 10.75%, compounding pressure on mortgage holders and small businesses already facing the weakest growth among major emerging markets.
The central bank maintained its medium-term growth outlook of about 2%, provided the international environment stabilizes and the government continues implementing reforms. It reiterated the importance of structural reforms in the energy and transport sectors, as well as debt and inflation control, to support sustainable growth.
Nigeria holds, recalculates
The CBN’s 307th MPC meeting, held on 21-22 September, reset the MPR at 23.00% and recalibrated the standing facilities corridor to +50/-300 basis points. The committee emphasized that this is “an important operational realignment aimed at strengthening monetary policy transmission and reinforcing the primacy of the monetary policy rate” — not a change in stance.
Eleven members attended. The MPC noted that the observed divergence between the MPR and prevailing market rates had “weakened the effectiveness of monetary policy transmission,” and that the reset is designed to “better align the monetary policy implementation framework with market realities” as the bank transitions toward an inflation targeting framework.
The macroeconomic backdrop for the hold was notably stronger than South Africa’s. Nigeria’s headline inflation slowed to 15.39% year-on-year in August 2026 from 15.43% in July, driven by both food and core measures. Food inflation fell to 19.57% from 20.31%, reflecting moderation in palm oil, vegetables, and meat prices. Core inflation eased to 13.29% from 14.97%.
The 12-month moving average headline inflation rate continued its decline to 16.30% from 16.89%, marking 20 consecutive months of moderation.
Real GDP grew by 4.43% in Q2 2026 from 3.89% in Q1, with the non-oil sector expanding 4.31% and the oil sector accelerating to 7.31% from 2.57%. The composite Purchasing Managers’ Index rose to 52.7 from 51.1 in July, suggesting further expansion.
External reserves reached US$55.25 billion on 18 September 2026 — the highest level in 18 years — sufficient to finance approximately 11.3 months of imports of goods and services. The balance of payments surplus widened to US$3.51 billion in Q2 2026 from US$2.38 billion in Q1, and the current account surplus increased 67.92% to US$7.54 billion from US$4.49 billion.
At the official foreign exchange market, the naira weakened slightly to N1,328.67 per dollar on 24 September from N1,328.50 the previous day. At the parallel market, the naira remained flat at N1,385 per dollar.
Two economies, one oil shock
The policy divergence reflects the fundamental asymmetry of the Hormuz crisis for African economies. South Africa imports virtually all of its crude oil; Nigeria exports it. For South Africa, oil above US$110 a barrel translates directly into higher fuel costs, higher transport costs, higher food prices, and reduced household disposable income. For Nigeria, elevated crude prices support export revenues and the external position.
The SARB faces a painful trilemma: the economy needs lower rates to stimulate growth and employment; inflation driven by imported energy costs requires rates to stay high or go higher; and the rand’s weakness — which worsens imported inflation — argues against any easing. South Africa’s unemployment rate hit 32.7% in Q1 2026, the highest of any major economy, with 345,000 jobs lost in a single quarter.
Nigeria’s CBN, by contrast, has headroom. The committee welcomed the “considerable improvement in the balance of payment surplus” and “the progress of the disinflation process, evidenced by three consecutive months of decline in headline inflation despite the lingering geopolitical tensions in the Middle East and the associated increase in global energy prices.” The MPC acknowledged the Presidential Initiative on National Affordable CNG Transit Programme, which is expected to lower transportation costs and support the continued decline in inflationary pressures.
The CBN also noted the signing of a Memorandum of Understanding on fiscal-monetary coordination between the Federal Government and the Federal Ministry of Finance, providing “a structured framework to strengthen policy harmonisation towards the achievement of low and stable inflation.”
Looking ahead
The SARB said risks to its growth outlook remain tilted to the downside despite expectations that economic activity will recover in the coming months. The central bank stressed that structural reforms in energy and transport, along with debt and inflation control, are essential for sustainable growth.
The CBN said domestic output growth is expected to “remain resilient for the rest of 2026, supported by the continued improvement in crude oil production, expansion in agriculture and other business activities.” Inflation is projected to “moderate further in the short-to-medium term, underpinned by stability in the foreign exchange market, the lagged impact of earlier monetary policy tightening and expectations of improved food supply as the harvest season progresses.”
The Committee cautioned that “prolonged geopolitical tensions in the Middle East and election-related spendings could present upside risks to price development” and reaffirmed its “resolve to ensure that future decisions remain data dependent towards sustaining disinflation.”
The next CBN MPC meeting is scheduled for 23-24 November 2026. The SARB’s next rate decision will come under even sharper scrutiny if oil prices remain above US$100 a barrel — a scenario in which the South African central bank may be forced to hike further, pushing growth toward zero, while its northern neighbor holds firm at a rate that would have been unthinkable a year ago.
