What if a wave of US municipal defaults stresses credit markets?
A US muni-default cascade is a contained credit event: HY proxies widen but the modeled move is small because the muni market is largely insulated and tax-advantaged-held. Rhymes with Detroit's 2013 bankruptcy and Puerto Rico's 2016 default - severe locally, minimal systemic spillover. Transmission: muni insurers (the monolines) and the affected states' issuance costs are the pressure points. Skeptic: only escalate if defaults cluster across multiple large states and re-rate the whole asset class, otherwise this is an idiosyncratic spread-widening trade, not a macro risk-off.
how we built this number — every step
The class rate is measured from our dated, sourced event library (decade-normalized Poisson — the full table is public at base_rates.json). The variant’s share within its class is the analyst’s editorial call, published so you can audit it. A wider range means thinner precedent. Full recipe: methodology · scored at Reality Check.
The butterfly cascade
How this trigger trickles across markets, left → right — the root shock, its first‑order moves, then the ripple effects. Drag any node; tap a market for its real price history.
Resolution timeline — how this probability is moving
Our model's odds (gold) over time vs the crowd's (Polymarket, blue), from the past toward the 1–3 years horizon. Each dot is a real macro event that nudged the probability — green pushed it up, red pushed it down. Tap a dot for the source. The gold path is an illustrative reconstruction anchored to today's estimate — real dated events, not a live re-estimate history.
What it would mean
If this plays out, it is a risk-off shock. A US state/municipal default cascade stresses the muni and credit markets. The trigger decomposes into signed root‑shocks — Credit spreads ▲ — which propagate through our causal graph to the markets below.
If it happens — the markets it would move
Biggest moves first. Projected moves are cascade-model priors; hist A–B% = what comparable past events actually did (measured abnormal returns), and model prior · unmeasured marks markets with no analogue backing yet. Tap any market for its price history.
| Market | Class | Projected move | |
|---|---|---|---|
| 1 | High-yield credit HYG 📈 chart | Rate | ▼ -0.4% hist -0.6–+0.02% · other way -0.16% (n=12) |
| 2 | Financials XLF 📈 chart | Equity | ▼ -0.3% hist -0.51–+0.07% · other way -0.09% (n=12) |
| 3 | MicroStrategy MSTRon Hyperliquid 📈 chart | Equity | ▼ -0.3% hist -0.26–+0.12% · other way +26.61% (n=12) |
| 4 | JPMorgan JPM 📈 chart | Equity | ▼ -0.2% hist -0.46–+0.6% · other way +1.78% (n=12) |
| 5 | Volatility (VIX) VIXon Hyperliquid 📈 chart | Vol | ▲ +0.2% hist -0.57–+1.39% · other way -3.49% (n=12) |
| 6 | S&P 500 SPXon Hyperliquid 📈 chart | Index | ▼ -0.1% hist -1.29–+0.55% · other way -0.44% (n=12) |
| 7 | Bitcoin BTCon Hyperliquid 📈 chart | Crypto | ▼ -0.1% hist -5.78–+1.41% · other way +6.05% (n=11) |
Probable recommendation
Historical precedent — what analogous events actually did
Across 40 analogous events (overlap‑weighted), as abnormal returns — market beta stripped, so it's the event's own effect, not the market backdrop. Shown at 20 days (persistent) and 5 days (immediate); ↺ fades = the two horizons disagree. Confidence = consistency × sample × significance.
| Asset | History says | Abnormal (20d · 5d) | Hit | n | Confidence | vs cascade |
|---|---|---|---|---|---|---|
| US dollar DXY | LONG | +0.9% · 5d +0.2% | 70% | 40 | 0.35 | · |
| Bitcoin BTC | SHORT | -5.0% · 5d -3.3% | 69% | 19 | 0.31 | ✓ matches cascade |
| High-yield credit HYG | SHORT | -0.4% · 5d +-0.0% | 61% | 39 | 0.18 | ✓ matches cascade |
| 10y yield DGS10 | SHORT | -7bp · 5d -4bp | 59% | 40 | 0.16 | · |
| Gold XAU | SHORT | -1.2% · 5d -0.1% | 55% | 39 | 0.11 | · |
| XLF XLF | SHORT | -0.3% · 5d -1.2% | 49% | 39 | 0.00 | ✓ matches cascade |
| MSTR MSTR | LONG | +0.2% · 5d -1.6% ↺ fades | 43% | 39 | 0.00 | ⚠ differs |
| JPM JPM | LONG | +0.7% · 5d -1.4% ↺ fades | 43% | 40 | 0.00 | ⚠ differs |
| Volatility VIX | LONG | +1.2% · 5d +2.0% | 38% | 40 | 0.00 | ✓ matches cascade |
| SPX SPX | SHORT | -1.2% · 5d -0.6% | 41% | 40 | 0.00 | ✓ matches cascade |
Why this probability
Muni defaults occur but a cascading state/muni crisis is contained historically; low-moderate over 1-3yr. A base‑rate‑anchored prior, continuously scored against what actually happens — not a forecast.