── ── Mental model

Minsky Moment

A Minsky Moment is the point at which a leveraged financial system tips from apparent stability into rapid self-reinforcing collapse — caused by the internal dynamic of debt accumulation that sustained stability itself produced. Minsky identified three debt stages systems cycle through: Hedge (income covers principal + interest), Speculative (income covers interest only; must roll over principal), Ponzi (income covers…

How it works

Stop rule: If cash flow and debt service data are unavailable, name the data gap — do not force a diagnosis.

1. Classify debt structure. Hedge (income covers P+I) / Speculative (interest only, rollover-dependent) / Ponzi (appreciation-dependent). Assign stage or distribution. 2. Measure stability runway. Duration of low-volatility regime; leverage ratio trend; lending standard trend. Key signal: loosening standards during stability. 3. Identify trigger stress. For speculative units: credit tightening that prevents rollover. For Ponzi units: price decline below obligation. Name mechanism and magnitude. 4. Map collapse cascade. First-order consequences → price compression / credit tightening → second-order reach to speculative units → cascade floor.

When to use it

• user asks 'is this a bubble?', 'what's the tail risk here?', 'this time is different', 'leverage has been stable for years', 'the fundamentals support these prices', someone wants to diagnose credit cycle fragility, analyze debt structure risk, or assess whether a calm financial period is hiding systemic danger

Worked example

US Subprime Mortgage Market (2003–2008)

Primary-source-documented case. McCulley coined the phrase in 1998; the subprime application became the canonical Minsky Moment diagnosis. Primary sources: Minsky (1986, 1992); McCulley, Paul. "Teton Reflections," PIMCO Global Central Bank Focus, September 2007; and the Financial Crisis Inquiry Commission Report (2011).