Boom: Bubbles and the End of Stagnation
Source: https://press.stripe.com/boom ↗
Hobart and Huber make the contrarian argument that speculative bubbles are not market failures to be prevented but the mechanism through which societies fund risky technological transitions that rational capital allocation would never support.
The book connects the dot-com bubble, railway mania, and earlier episodes of speculative excess to show that the infrastructure left behind — fibre optic cables, railway networks, factory capacity — repeatedly became the foundation for the next wave of real growth.
This connects directly to Carlota Perez's theory of technological revolutions and the recurring pattern of installation and deployment periods.
For product directors, the implication is that the funding environment shapes what gets built, and understanding the dynamics of speculative capital is as important as understanding user needs.
The writing is dense with ideas but short enough to finish in an afternoon, which is characteristic of the best Stripe Press titles.
Central argument
Hobart and Huber argue that speculative bubbles are not pathological market failures but a necessary financing mechanism for technological transitions that rational capital allocation would systematically underfund. The core claim is that the excess of a bubble — overbuilding railways, laying too much fibre optic cable, funding hundreds of competing dot-com ventures — reliably leaves behind physical and institutional infrastructure that enables the next wave of genuine economic growth. The book uses this pattern to rehabilitate speculation as a feature of innovation systems rather than a bug to be regulated away.
Critique
The argument risks a survivorship fallacy at its core: it identifies the bubbles whose infrastructural residue proved generative while giving insufficient weight to speculative episodes that left behind nothing of comparable value, or whose costs — misallocated labour, wiped-out retail investors, delayed productive investment — outweighed the eventual benefits. A thoughtful reader would also press on the causal claim: it is not obvious that the same infrastructure could not have been built, perhaps more efficiently, through alternative financing structures, meaning the bubble may be correlated with the transition rather than causally necessary for it.
Why it matters for product
For a product director, the practical implication is that the funding environment is not just a backdrop — it actively determines what problem spaces get explored and what infrastructure becomes cheaply available to build on, which means reading capital cycles is a legitimate input into roadmap strategy, not a distraction from user research. Concretely, the post-2021 contraction in venture funding is not simply a risk-off moment but, on the book's logic, the deployment phase following an installation bubble — the conditions in which disciplined product teams building on commoditised infrastructure (cloud, ML APIs, broadband) can compound advantages that were impossible to build during the speculative peak.