maturity mismatch
Maturity Mismatch is when a bank or company borrows short term money but lends or ties it up long term, leaving a gap if everyone wants their cash back at once.
In plain English
Why did some banks that looked perfectly healthy on paper suddenly struggle to pay customers who came to withdraw their own money.
That question sits at the heart of maturity mismatch, and it explains more banking wobbles than most people realise.
Here is the plain version. A bank takes deposits that customers can withdraw any time, or in thirty days, or in three months. Then it lends that same money out as a five year mortgage or a ten year business loan. The bank is not doing anything dishonest. This is actually how banking works everywhere, borrowing short and lending long, because that spread is where the profit comes from.
The trouble starts when too many depositors want their money back at the same time, but the loans the bank gave out have not come back yet because they are not due for years. A Lagos bank that funded long term property loans with mostly current accounts and short term deposits could find itself short of cash on a Friday even though it is not actually broke on paper. It simply cannot turn a ten year loan into cash fast enough to meet today's withdrawal queue.
In the United Kingdom, this exact pattern helped bring down Northern Rock in 2008. It relied heavily on short term borrowing from other banks to fund long term mortgages, and when that short term funding dried up overnight, the whole thing unravelled in days, not years.
For a diaspora reader, think of it this way. If you send ₦2,000,000 home and your relative puts it in a fixed deposit expecting to withdraw it whenever they like, but the bank has calmly lent that same money out for four years, there is a mismatch sitting underneath that convenience. It usually never bites. But when it does, it bites fast.
A bank holds ₦50,000,000,000 in deposits that customers can withdraw within thirty days, but has lent ₦40,000,000,000 of that out as five year business loans. If just fifteen percent of depositors ask for their money back this month, the bank cannot call the loans early to cover it, and that gap is the maturity mismatch showing its teeth.
Questions people ask
Is maturity mismatch always a sign of a bank in trouble?
No, it is normal and expected in banking, since borrowing short to lend long is the basic business model. It only becomes dangerous when the gap is too wide, poorly monitored, or hits at the same time as a rush of withdrawals.
How do regulators stop maturity mismatch from causing bank collapses?
Regulators set liquidity rules requiring banks to hold enough easily sellable assets and stable funding to survive sudden withdrawal pressure, and this sits under the broader umbrella of prudential regulation.
Can maturity mismatch affect ordinary savers directly?
Yes, if a bank cannot meet withdrawal demand because its funds are tied up in long term loans, savers can face delays or, in severe cases, a run that forces regulators to step in and freeze or restructure the bank.
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