What The Frenzy Leaves Behind

In the session of 1846, Westminster passed 272 Acts authorising roughly 4,500 miles of new railway. Across the peak sessions of 1844 to 1846, promoters won approval for some 8,000 miles; a decade earlier the operating network was a few hundred. They issued the shares partly paid: a deposit of five or ten per cent secured the certificate, and the company could call the remainder as construction proceeded. By modern estimates, railway construction absorbed close to seven per cent of national income at its 1847 peak.

An index of railway shares roughly doubled between 1843 and the summer of 1845; by 1850 it had surrendered the whole advance and more, to around two thirds below the peak. The companies made their calls into the falling market, so many holders owed fresh instalments on shares worth less than the sums paid. George Hudson, the “Railway King”, controlled more than a quarter of the network, and his dividends proved to have been paid partly out of capital. He was disgraced and driven from his chairmanships in 1849, and the claims that followed completed his ruin.

Yet by 1850 more than 6,000 miles of railway were open in Britain, the greater part built during the convulsion. Within a generation the network had opened national markets for fresh food, collapsed the cost of moving coal and people, and pushed the country onto a single railway time.

The verdict on the 1840s is therefore double: one of the great destructions of investor capital in British history, and one of the great creations of economic value. A cash-flow view says the subscribers mispriced the assets, and they did. A behavioural view says the crowd was carried away, and the shareholder records complicate it: the subscribers included the informed and the experienced, and the insiders lost alongside the outsiders. Both treat the investors’ outcome as the whole story, and both leave the same fact unexplained: the losses and the value creation came out of the same event.

What kind of problem is this?

It is tempting to file the episode under error, but the record resists it: the canal promotions of the 1790s ran the same course, electrification ran it again, and so did the fibre-optic construction of the late 1990s. Hyman Minsky described how stability breeds the credit structures that undo it, and his mechanics explain how any of these run-ups builds. They do not explain why the largest gather around new technologies, nor why the wreckage often has a golden age on the far side. A single episode can be read as a lapse. A repetition has to be read as a process: the same course every half-century or so, always attached to a transforming technology, always pairing private loss with public gain.

When what matters is how a new technology and the capital that funds it move through an economy, in phases, with value changing hands as they go, that is a specific shape of problem: diffusion. And the discipline that has thought most rigorously about the diffusion of technological revolutions is neo-Schumpeterian economics, the tradition that descends from Schumpeter’s account of creative destruction.

So let’s borrow.

This is the multi-model move: recognise the shape of a problem, find the discipline that has thought rigorously about that shape, and import its frameworks deliberately rather than reinventing them from scratch.

The discipline’s evidence is historical: five great surges reconstructed from two centuries of record. The structural logic transfers: two kinds of capital move through an ordered sequence of phases, and value migrates between them.

The framework comes from Carlota Perez, who set it out in Technological Revolutions and Financial Capital (2002). She identifies five technological revolutions since 1771: water-powered mechanisation; steam and railways from 1829; steel, electricity and heavy engineering from 1875; oil, the automobile and mass production from 1908; and the information age, opened by the microprocessor, from 1971. Each is a cluster of technologies plus a techno-economic paradigm, a new common sense about best practice, and she argues the paradigm matters more.

Each surge, on her reconstruction, runs the same sequence. An installation period opens with irruption, when the new technologies appear amid the decline of the old paradigm. It builds to a frenzy, her term for the phase in which finance takes command. A turning point follows: collapse, recession, scandal, and the institutional recomposition they force. Then comes a deployment period. It opens in the phase she calls synergy, when the paradigm spreads across the whole economy, and ends in maturity, when the paradigm’s potential nears exhaustion and restless capital goes hunting for the next irruption.

Her distinction between two kinds of capital drives the sequence. Financial capital is mobile and uncommitted: it holds claims and can leave. Production capital is embodied: it lives in particular firms, plants and knowledge, and it cannot exit without ceasing to be what it is. During installation, financial capital is in command, and the frenzy is what command looks like: money pours into new infrastructure at prices detached from any defensible projection of cash flows.

Perez’s claim is that the detachment is functional. Prices that had stopped doing arithmetic routed seven per cent of Britain’s national income into iron rails within a few years, at a pace and on a scale that sober valuation was unlikely to match. The frenzy funds parallel experiments, most of which fail. It installs capacity years ahead of the demand that justifies it, and it breaks the commercial and political grip of the paradigm being displaced. Functional does not mean necessary or efficient: much of the loss was plain waste, and the capacity might have been built more slowly with less ruin. The turning point then demands an institutional catch-up: in Britain, the accounting scrutiny and reform that followed Hudson’s exposure and the standards that a national network required. Where the catch-up succeeds, command passes to production capital, which spends the deployment period making the installed base earn.

The framework first separates two things the 1845 subscriber had fused: the return to the technology and the return to its financier. The railway was among the most productive technologies in British history, and railway shares bought in 1845 were among the worst investments of the century. Both hold because the value went to other parties: to users, through cheaper transport, and to the operators of the deployment period, who bought capacity below its construction cost. Infrastructure priced in a frenzy tends to be owned twice: once, expensively, by the financiers who build it, and once, cheaply, by the consolidators who run it.

The Room That Runs Out described carrying capacity: capital that crowds into a niche compresses the returns that attracted it. The inflow that validates an opportunity is the inflow that consumes it. The frenzy is that dynamic at national scale, with one difference: the overshoot leaves physical infrastructure standing for someone else to earn from. And the ergodicity problem from The Path The Maths Misses applies here. The aggregate gain describes no holder’s experience: each subscriber lived a single path. The partly paid structure meant many paths hit an absorbing barrier — a call that could not be met — years before deployment arrived to pay anyone. Society could afford to wait for the golden age. A holder facing a call in 1848 could not.

The framework implies a second separation: what a price is doing changes with the phase. In deployment, a price is mostly a forecast, a claim about the cash an asset will produce. In installation, a price is partly a recruiting instrument: it is how an economy commits itself to one paradigm rather than another. Frenzy pricing is the beauty contest of What Others Think Others Think: the operative question is not what the asset will earn but what the next subscriber will pay. The elevated price let promoters float new schemes and fill subscriptions to partly paid shares; the calls that followed drew on those contracts. As a forecast of railway cash flows, the market failed. As a device for mobilising an unprecedented share of national saving, it worked. Only one of those jobs pays the holder.

Installation rewarded access and exit; deployment rewarded operations and consolidation. Why Good Strategies Stop Working gave the general mechanism: a strategy is fit for an environment, and environments move. Perez adds a timetable: the environment does not drift at random but advances through an ordered sequence, so the competence one phase rewards becomes a liability in the next.

None of this yields a timing rule, nor a licence to sit installations out: investors made fortunes inside them. It changes the questions. If the technology succeeds, where does the value settle after the turning point: with surviving equity, successor owners, suppliers, landowners or users? The technology thesis and the security thesis feel identical during a frenzy and come apart at the turning point.

For institutions, the lesson is liability structure. The 1845 subscriber’s problem was not merely horizon. Many intended to hold for decades and believed, correctly, in the railway. The problem was the call: a capital structure that could demand cash at the moment cash was dearest. The financial value of what the frenzy built goes to whichever claims are still attached to the assets after the turning point. Survivorship turns less on conviction than on the structure of those claims: whether capital can be called, margined or redeemed at the trough. Patience is a property of liabilities before it is a virtue of investors.

The framework extends beyond finance. In organisations, a new technology arrives the same way: pilots install capability ahead of any use that justifies it, and the value appears when a duller consolidating phase makes the installed base earn. In careers, promotion in one phase selects the habits the next phase retires.

A scheme with four named phases and a turning point invites you to date the present, and the date is the one thing it cannot supply in real time. Knowing that frenzies finance futures does not reveal which job the surge in front of you is doing; it reveals that the question exists. Understanding the sequence does not exempt you from your position in it.

The discipline is in asking: is this a forecast or a mobilisation, and who inherits what it installs?

References & Further Reading

1. Technological Revolutions and Financial Capital: Carlota Perez

2. As Time Goes By: From the Industrial Revolutions to the Information Revolution: Chris Freeman & Francisco Louçã

3. Collective Hallucinations and Inefficient Markets: The British Railway Mania of the 1840s: Andrew Odlyzko

4. Dispelling the Myth of the Naive Investor during the British Railway Mania, 1845–46: Gareth Campbell & John D. Turner

5. Stabilizing an Unstable Economy: Hyman P. Minsky

6. Capitalism, Socialism and Democracy: Joseph A. Schumpeter