The Central Bank of Nigeria (CBN) has raised the interest rate on its one-year Treasury Bill to 17.59 per cent despite receiving a massive N4.4 trillion in bids for instruments worth only N700 billion.
The increase came at the CBN’s Treasury Bills auction on Wednesday, August 12, 2026, and surprised investors who expected the huge demand to push the rate lower.
In simple terms, Treasury Bills are short-term government investment papers. Investors lend money to the government by buying the bills and earn interest in return. The higher the rate, the more the government has to pay investors for borrowing.
The strongest demand was recorded on the 364-day Treasury Bill, which had N500 billion on offer but attracted N4.19 trillion in bids—more than eight times the amount available.
Rather than reduce the rate because investors were competing heavily to buy the bills, the CBN increased it by 0.24 percentage points, from 17.35 per cent to 17.59 per cent.
The apex bank also allotted N1.26 trillion on the one-year bill, N760 billion more than the N500 billion initially advertised.
For the shorter-term bills, the CBN kept rates unchanged. The 182-day bill had a 16.50 per cent stop rate, while the 91-day bill remained at 16.30 per cent.
The 182-day bill attracted N63.97 billion in bids against N100 billion offered, while the 91-day instrument received N162.21 billion in bids against the same N100 billion offer.
The latest move is a reversal of the trend seen at the July 29 auction, when the CBN cut the one-year Treasury Bill rate by 0.31 percentage points to 17.35 per cent despite strong investor demand.
The decision also indicates that the CBN is still comfortable keeping returns on government securities high, even though there is substantial cash available in the banking system.
According to the auction report, the banking system received N2.48 trillion from an Open Market Operations (OMO) repayment on August 11 alone, contributing to N5.21 trillion in net liquidity injected into the system in the preceding week.
In layman’s terms, banks and other investors have plenty of money looking for profitable places to invest, yet the CBN is still offering a high return on Treasury Bills.
The auction is part of the CBN’s third-quarter 2026 Treasury Bills programme, which targets N5.8 trillion in gross issuance between July and September. The government is using domestic borrowing partly to finance its fiscal deficit.
The latest rate increase could also mean that investors may continue to enjoy Treasury Bill yields above 17 per cent for some time, although analysts expect the CBN to begin cutting rates at its September Monetary Policy Committee meeting.
For the government, however, higher Treasury Bill rates mean a higher cost of borrowing, as it will have to pay more interest to investors who buy its short-term debt.
The outcome therefore sends a clear message: despite the huge appetite for Nigerian government securities, the CBN is not yet ready to significantly lower borrowing costs.