Bigger reserves, weaker naira, CBN research points to Nigeria’s deficit problem

On November 5, 2026, the Nigerian naira weakened to N1,350.45 per dollar, marking a decline of N4.44 from the previous day's closing of N1,346.01, according to Central Bank of Nigeria data shared by Nairametrics. Interbank turnover that day was around $82 million, a decrease from the previous session's $101 million. A week of naira softness is not uncommon, but the Bank's research provides a mechanism that aligns with the trading data.

A November 6 article in the CBN Journal of Applied Statistics, titled "Budget Deficit Dynamics and Macroeconomic Performance in Nigeria," outlines that budget deficits are a major catalyst for exchange-rate depreciation. When the government borrows heavily, domestic borrowing rates increase while the currency weakens over time. The study found no significant direct correlation between deficits and inflation, suggesting that inflation is influenced by supply shocks, structural bottlenecks, and the impact of a weaker naira on local prices.

This relationship, known as fiscal dominance, shows that government financing needs limit the Central Bank's ability to maintain monetary stability. Gross external reserves increased by $295.35 million in October 2026, reaching a record $46 billion. Despite the larger reserve buffer, the naira continued to depreciate in the first week of November.

The research highlights that reserves do not mitigate a persistent deficit, which competes for dollars and domestic credit. When the government borrows heavily at home, private borrowers face higher rates. The Monetary Policy Rate (MPR) is currently at 23%, following a 350-basis-point cut on September 22. The inflation rate in September stood at 14.63%.

The gap appears to offer room for monetary easing. To prevent this tightening cycle, the CBN journal suggests passing a legally binding fiscal rule to cap the budget deficit as a percentage of GDP. Public coordination between fiscal and monetary operations is also recommended, as abrupt liquidity squeezes following large government disbursements hinder the CBN's ability to respond promptly.

Lastly, the importance of monitoring the deficit path and domestic borrowing calendar is emphasized, rather than solely relying on external reserves as proof of a settled exchange rate.