A growth model built on borrowed funding, not deposits
Traditional banking is funded mainly by customer deposits: relatively stable money, spread across thousands of accounts, rarely withdrawn all at once. Northern Rock, by contrast, had adopted a business model known as 'originate to distribute': it issued mortgages and then bundled them into packages that it securitized and sold to institutional investors, obtaining the fresh cash needed to keep issuing new mortgages at a much faster pace than its traditional competitors.
This model worked extraordinarily well while wholesale funding markets remained open and cheap, letting Northern Rock grow far faster than banks with more conservative business models. The problem, invisible during the boom years, was that it depended almost entirely on other financial institutions remaining willing to lend it money, day after day, without interruption.
August 2007: the wholesale funding tap shuts off overnight
In August 2007, the US subprime mortgage crisis (which we cover in depth in our guide to the 2008 financial crisis) began spreading distrust among banks worldwide. No bank knew for certain how much exposure its competitors had to toxic assets tied to those mortgages, so, out of caution, they stopped lending to each other as freely as before.
For a traditional, deposit-funded bank, this would have been uncomfortable but manageable. For Northern Rock, which depended on constantly rolling over its short-term wholesale funding, it was fatal: overnight, it lost the ability to obtain the money it needed to keep operating normally.
The leak that triggered queues outside the branches
having lost access to wholesale funding, Northern Rock was forced to request an emergency liquidity line from the Bank of England, in its role as lender of last resort. This assistance, designed precisely to prevent a disorderly collapse, was leaked to the BBC on the night of September 13, 2007, before the bank could communicate it in a controlled way.
Upon learning their bank needed help from the central bank, thousands of Northern Rock customers queued outside branches over the following days to withdraw their savings, fearing they would lose their money. It was the first classic bank run, with physical queues and visibly anxious customers, that Britain had witnessed since the collapse of Overend, Gurney and Company in 1866, nearly a century and a half earlier.
From a public guarantee to full nationalization
The British government first tried to contain the panic by publicly guaranteeing all existing deposits at Northern Rock, an unprecedented measure that succeeded in stopping the queues but didn't solve the underlying problem: the bank still had no viable funding model. After months of unsuccessfully searching for a private buyer willing to acquire it, the British government fully nationalized Northern Rock in February 2008, temporarily turning it into state property.
The bank remained under public control until 2012, when its healthier assets were sold to the Virgin Money group, while a portion of its higher-risk mortgage portfolio was placed with a public entity created specifically to manage its orderly wind-down over the following years.
The lesson: growing fast on borrowed funding is a bet on others' confidence
The Northern Rock case, often overshadowed by the later magnitude of the Lehman Brothers collapse a year later, was actually one of the first serious warnings that the global financial crisis would run much deeper than many regulators anticipated in 2007. It showed that a bank can be profitable, solvent on paper, and hold a reasonable asset portfolio, and still collapse if its funding model depends entirely on others continuing to trust it day after day.
This same vulnerability, dependence on funding that can vanish overnight when confidence wavers, would reappear in almost identical form sixteen years later in the collapse of Silicon Valley Bank, as we'll see in a later chapter of this series.
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Frequently Asked Questions
Because its business model depended on constantly funding itself in short-term wholesale markets instead of with customer deposits. When those markets froze during the 2007 credit crunch, the bank had no way to fund its operations.
It means the bank issued mortgages and bundled them into packages sold to institutional investors (securitization), obtaining fresh funding to keep lending, rather than keeping those mortgages on its own balance sheet funded by deposits.
Because news that the bank had requested an emergency liquidity line from the Bank of England leaked to the press before it could be communicated in a controlled way, sparking panic among customers who feared losing their savings.
It was fully nationalized by the British government in February 2008. In 2012, its healthier assets were sold to the Virgin Money group, while the riskier portion of its portfolio was placed with a public entity for orderly wind-down.
The previous classic bank run, with customers physically queuing to withdraw their deposits, had occurred in 1866 with the collapse of Overend, Gurney and Company, nearly 141 years before the Northern Rock case.