Definition
Too big to fail describes a firm — usually a bank — whose size, complexity, and interconnection with the rest of the financial system make its collapse so dangerous that the government feels compelled to rescue it. Letting such an institution fail could freeze credit, topple counterparties, and trigger a wider economic crisis.
The phrase entered wide use during the 2008 financial crisis, when governments around the world stepped in to support major banks and insurers rather than allow disorderly bankruptcies.
Why it matters
How it works
When a systemically important firm nears collapse, policymakers face a grim choice. Allowing failure risks a chain reaction; preventing it commits public funds and shields private shareholders and creditors from the consequences of their decisions.
That dynamic creates moral hazard: if managers and investors expect a backstop, they have weaker incentives to manage risk prudently. Post-2008 reforms — higher capital requirements, stress tests, and orderly resolution plans known as living wills — try to reduce both the likelihood of failure and the need for taxpayer rescue.