Treasury bills drive 43% growth in interest income for

Nigeria's three largest banking institutions—Zenith Bank, Guaranty Trust Holding Company (GTCO), and FirstHoldCo—collectively harvested N2.85 trillion (approximately €1.7 billion) from Treasury bill investments in 2025, representing a dramatic 43% surge compared to 2024's N1.99 trillion. This explosive growth in interest income signals a fundamental shift in how Nigeria's financial elite are deploying capital, with profound implications for European investors assessing African market opportunities.

The Treasury bill surge reflects a strategic reallocation within Nigeria's banking sector. Rather than aggressively pursuing traditional lending—which carries elevated credit risk in Nigeria's volatile economy—these institutions have opted for the relative safety of government debt instruments. Nigerian Treasury bills, particularly those with 6-month and 12-month maturities, now yield 18-22% annually, making them extraordinarily attractive compared to European government bonds (typically 2-4%) and even US Treasuries (4-5%). For European investors seeking yield enhancement in emerging markets, this disparity is impossible to ignore.

What makes this trend particularly significant is the underlying macroeconomic context. Nigeria's Central Bank has maintained an aggressive monetary tightening cycle throughout 2024-2025, keeping policy rates elevated to combat persistent inflation. While this creates headwinds for borrowers and corporates seeking cheap credit, it generates a pristine environment for fixed-income investors. The 43% year-on-year jump suggests that Nigerian banks themselves are recognizing that Treasury instruments now offer superior risk-adjusted returns compared to the loan book—a tacit acknowledgment of deteriorating credit conditions in the broader Nigerian economy.

For European institutional investors, this development warrants careful analysis. On one hand, the accessibility and liquidity of Nigerian Treasury bills have improved markedly, with the Central Bank Securities clearing system now allowing foreign participation through local custodians. The yields are genuinely compelling: a European investor earning 2% on German Bunds could theoretically capture 15+ percentage points of additional yield by rotating into Nigerian short-dated government debt. However, this spread comes with currency risk—the Nigerian Naira remains volatile against the Euro, and devaluation could erode returns.

The structural shift also signals something darker: traditional bank lending is increasingly unviable. Corporate loan demand remains subdued because Nigerian businesses are themselves struggling with elevated borrowing costs and weakened consumer purchasing power. By rotating into Treasury bills, Zenith, GTCO, and FirstHoldCo are effectively voting "no confidence" in Nigeria's near-term credit environment. This is a critical signal for European investors considering exposure to Nigerian corporates—if the banks themselves are pulling back from lending, credit conditions are likely to tighten further.

The concentration of Treasury bill income among Nigeria's "big three" banks also raises governance questions. These institutions possess market power and preferential access to government debt that smaller competitors cannot match. European investors considering equity stakes in Nigerian financial institutions should factor this oligopolistic advantage into valuation models—it insulates returns even as the broader economy struggles.

Looking forward, expect this trend to persist. As long as Nigerian inflation remains elevated and the Central Bank maintains defensive positioning, Treasury yields will remain attractive relative to global alternatives. However, sustainability depends on the government's fiscal discipline and the Central Bank's credibility in managing inflation expectations.