The Central Bank of Nigeria (CBN) has raised the stop rate on its benchmark 364-day Treasury Bill to 17.59 percent, defying expectations that overwhelming investor demand would force borrowing costs lower and signalling that elevated yields may persist in Nigeria’s fixed-income market.
The apex bank raised the one-year stop rate by 24 basis points at Wednesday’s Treasury Bills auction, even as investors submitted N4.19 trillion in bids for the N500 billion offered on the 364-day instrument.
Across the three tenors, investors submitted a combined N4.4 trillion in bids against the N700 billion advertised, according to auction results obtained at the close of business on Wednesday, August 12, 2026.
The outcome marks a reversal from the July 29 auction, when the CBN cut the 364-day stop rate by 31 basis points to 17.35 percent despite subscriptions reaching nearly seven times the amount offered.
This time, demand for the one-year bill was more than eight times the offer size, yet the CBN opted to pay investors more rather than maintain or reduce the clearing rate.
The 364-day bill attracted N4.19 trillion in subscriptions, compared with N500 billion on offer, while the CBN allotted N1.26 trillion, exceeding the advertised amount by N760 billion.
The stop rate consequently climbed to 17.59 percent from 17.35 percent.
The decision is notable because heavy oversubscription typically gives an issuer greater flexibility to reject higher-priced bids and clear the auction at a lower yield.
The CBN’s decision to increase the rate despite the depth of demand indicates that the auction is serving a broader liquidity-management purpose beyond simply raising funds for the government.
The shorter-dated instruments recorded less aggressive demand.
The 182-day bill attracted N63.97 billion against N100 billion offered, with N47.48 billion allotted at an unchanged stop rate of 16.50 percent.
The 91-day bill recorded N162.21 billion in subscriptions against N100 billion offered, with N148.57 billion allotted at 16.30 percent, also unchanged.
The bills mature on November 12, 2026, February 11, 2027 and August 12, 2027, respectively.
Wednesday’s auction disrupts the gradual easing in Treasury Bill yields that had emerged in recent weeks.
At the July 15 auction, the CBN allotted N1.19 trillion after investors submitted N2.87 trillion in bids for the 364-day bill, with the stop rate easing by four basis points.
At the July 29 auction, subscriptions rose to N3.38 trillion, prompting the CBN to cut the one-year rate by 31 basis points to 17.35 percent.
The latest auction has now reversed that move, taking the one-year yield back towards the 17.70 percent level recorded at the July 8 auction, when the CBN raised the rate to its highest level in weeks.
The persistence of yields above 17 percent keeps the benchmark instrument firmly above headline inflation and could sustain investor appetite for government securities, particularly among institutional investors seeking relatively high fixed-income returns.
The rate increase comes against the backdrop of substantial liquidity injections into the banking system.
The banking system reportedly received N2.48 trillion from an OMO repayment on August 11 alone, contributing to a broader N5.21 trillion net liquidity injection over the preceding week.
Ordinarily, such a substantial liquidity build-up would intensify competition among banks to deploy excess funds into securities, potentially pushing Treasury Bill yields lower.
Instead, the CBN raised the one-year stop rate.
The move indicates the apex bank may be using Treasury Bill issuance and related market operations as part of its liquidity sterilisation strategy, rather than treating the auction solely as a government funding exercise.
In July, the CBN reportedly mopped up N7.2 trillion through Open Market Operations (OMO), taking cumulative 2026 sterilisation above N50 trillion.
The latest auction therefore adds another layer to the CBN’s liquidity-management strategy at a time when the banking system is receiving substantial inflows.
Investors may still have a window above 17 per cent.
For fixed-income investors, the latest auction reinforces the possibility that high Treasury Bill yields could remain available for longer than previously expected.
Market expectations had increasingly pointed towards a gradual decline in yields as inflation moderates and investors price in the possibility of a CBN rate cut at the September Monetary Policy Committee (MPC) meeting.
Analysts continue to expect the first rate cut at the September meeting, which could eventually place downward pressure on short-term government securities yields.
Wednesday’s auction, however, suggests the CBN is not yet ready to relinquish its grip on borrowing costs.
For investors, that could make the current yield environment one of the last opportunities to lock in returns above 17 percent on the one-year Treasury Bill before monetary easing begins.
The development also raises fresh questions over the timing and pace of any prospective rate-cutting cycle, particularly as the CBN balances liquidity conditions, inflation, government financing needs and monetary-policy transmission.
The auction forms part of the CBN’s Q3 2026 Treasury Bills Issuance Programme, which targets about N5.8 trillion in gross issuance between July and September.
The programme is expected to support government financing needs, including the financing of a projected fiscal deficit of about N29.20 trillion.
The August 12 auction is the second consecutive large-offer auction in which the 364-day instrument has cleared above 17 percent, following the July 8 and July 29 auctions.
With demand continuing to overwhelm supply at the long end, the CBN’s willingness to raise the stop rate indicates that investor appetite alone may not be sufficient to drive yields lower.
Instead, the latest auction points to a fixed-income market caught between abundant liquidity, strong demand for government securities and a central bank that remains willing to pay a premium for longer-term funding while actively managing system liquidity.
The result leaves the 364-day Treasury Bill yield at 17.59 percent, preserving its appeal to investors even as markets await clearer signals on whether the expected September rate cut will mark the beginning of a sustained easing cycle.
