There is a sentence that central bankers do not say in public: "We are not sure this will work."
They have reason for that reticence. Central bank credibility is itself a policy instrument — perhaps the most powerful one available. A central banker who expresses doubt about the transmission mechanisms of monetary policy is undermining the very tools they rely on to manage expectations. So they speak with the careful confidence of surgeons before an operation they privately know carries significant uncertainty.
But the uncertainty is real. And the toolkit available to the major central banks — the Federal Reserve, the European Central Bank, the Bank of England — is showing structural wear that is becoming increasingly difficult to paper over.
What Has Changed
The post-2008 era produced a set of monetary policy innovations that were, at the time, genuinely novel: quantitative easing, zero and negative interest rates, forward guidance as a primary tool. These instruments worked — to varying degrees, and with significant side effects — in the deflationary, low-growth environment of the 2010s.
The 2020s have produced a different environment. Inflation returned with a vigor that caught most central banks badly wrong-footed. The rate increases of 2022-2024 succeeded in reducing inflation — but at the cost of financial stress in banking systems, sovereign debt servicing pressure in emerging markets, and a housing affordability crisis in major economies that is now generating significant political backlash.
As central banks now contemplate returning rates toward neutral, they face a landscape littered with vulnerabilities created by the hiking cycle itself. Commercial real estate is deeply stressed. Regional banks in the United States are carrying portfolios that look manageable at current interest rates and catastrophic at significantly higher ones. The federal debt load means that each basis point of rate increase costs the U.S. government measurably more than it did a decade ago.
The room to maneuver has shrunk. The consequences of error have grown.
The African Dimension
For Africa's central banks, the constraints are different but no less binding.
The monetary policy challenges facing the South African Reserve Bank, the Central Bank of Nigeria, the Bank of Ghana, and their peers are in some ways the mirror image of Western problems. Where the Fed worries about debt levels that constrain rate rises, African central banks often face the opposite: inadequate room to cut rates without triggering currency depreciation and inflation, even when economic conditions would warrant stimulus.
The transmission mechanisms are also weaker. In economies where a large proportion of activity occurs in the informal sector, interest rate signals travel slowly and imperfectly to the real economy. A rate cut in Lagos does not reliably produce the consumption increase that a rate cut in Frankfurt would.
This is not a reason for despair. It is a reason for institutional humility and for developing policy tools better adapted to African economic structures — and for looking skeptically at imported frameworks designed for very different contexts.
What Comes Next
The honest answer is that nobody knows — and the people who are most confident should be trusted least.
What seems likely: the era of monetary policy as the primary macroeconomic management tool is ending. The next decade will see a more active role for fiscal policy, industrial strategy, and — in the African context — development finance institutions that can deploy patient capital in ways that private markets cannot.
It will also see continued experimentation with central bank digital currencies, which offer both genuine opportunities (financial inclusion, payment system efficiency) and genuine risks (disintermediation of the banking sector, erosion of monetary transmission) that are not yet well understood.
Central banks will need to be more honest about the limits of their toolkit. Institutions that acknowledge this first — and adapt accordingly — will be better positioned than those that maintain the confident posture of omnipotence until that posture becomes untenable.
The road is running out. The question is whether we build new road, or pretend we can keep driving.
Dr. Emeka Okafor is Chief Economist at the Abuja Policy Institute and a former advisor to the Central Bank of Nigeria.