What if a leveraged Treasury basis-trade unwind sparks a flash crash?
A basis-trade unwind dumps cash Treasuries as hedge funds are forced out of the long-bond/short-futures leg, spiking repo and dragging equities via vol-target deleveraging; trade is long vol / short Nasdaq into the liquidation. Closest analogue is the March 2020 Treasury 'dash for cash' when 10y yields backed up despite a risk-off tape. Forward angle: leverage in the trade is larger now (~$1tn+ notional), and a Fed SRF backstop exists, so the crash may be sharper but shorter than 2020.
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 leveraged Treasury basis-trade unwind causes a Treasury flash crash. The trigger decomposes into signed root‑shocks — Volatility (VIX) ▲ · 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 | Volatility (VIX) VIXon Hyperliquid 📈 chart | Vol | ▲ +8.1% hist +2.0–+4.64% · other way -0.58% (n=12) |
| 2 | Nasdaq 100 NDXon Hyperliquid 📈 chart | Index | ▼ -2.6% hist -1.64–-0.98% · other way +0.06% (n=12) |
| 3 | S&P 500 SPXon Hyperliquid 📈 chart | Index | ▼ -1.5% hist -1.22–-0.44% · other way +0.04% (n=12) |
| 4 | Tech sector XLK 📈 chart | Equity | ▼ -1.8% hist -1.4–-0.05% · other way +0.09% (n=12) |
| 5 | Semiconductors SMHon Hyperliquid 📈 chart | Equity | ▼ -1.3% hist -0.95–+1.26% · other way +2.75% (n=12) |
| 6 | High-yield credit HYG 📈 chart | Rate | ▼ -0.9% hist -0.87–-0.11% · other way -0.28% (n=12) |
| 7 | Nvidia NVDAon Hyperliquid 📈 chart | Equity | ▼ -1.0% hist -1.68–+2.0% · other way +3.35% (n=12) |
| 8 | Financials XLF 📈 chart | Equity | ▼ -0.6% hist -1.68–+0.3% · other way +0.01% (n=12) |
| 9 | AMD AMDon Hyperliquid 📈 chart | Equity | ▼ -0.9% hist -0.95–+0.56% · other way -1.07% (n=12) |
| 10 | Broadcom AVGOon Hyperliquid 📈 chart | Equity | ▼ -0.9% hist -1.12–+5.43% · other way +2.63% (n=12) |
| 11 | Micron MUon Hyperliquid 📈 chart | Equity | ▼ -0.9% hist -0.97–+0.6% · other way +5.79% (n=12) |
| 12 | TSMC TSMon Hyperliquid 📈 chart | Equity | ▼ -0.9% hist -0.59–-0.03% · other way +3.69% (n=12) |
| 13 | Marvell MRVLon Hyperliquid 📈 chart | Equity | ▼ -0.9% hist -0.82–+0.27% · other way +2.53% (n=12) |
| 14 | MicroStrategy MSTRon Hyperliquid 📈 chart | Equity | ▼ -0.6% hist -3.06–+0.72% · other way +27.47% (n=12) |
Probable recommendation
Why we may diverge from history
Trust the cascade short on MSTR: +6% reflects BTC's bull-regime, not a basis-trade unwind; note even the on-channel carry-unwind and Kaisa-default windows printed negative (-9%, -22%), confirming the leverage channel bites.
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 |
|---|---|---|---|---|---|---|
| AVGO AVGO | LONG | +4.8% · 5d +0.1% | 71% | 27 | 0.41 | ⚠ differs |
| High-yield credit HYG | SHORT | -0.4% · 5d -0.3% | 63% | 34 | 0.22 | ✓ matches cascade |
| SMH SMH | LONG | +1.7% · 5d -0.2% ↺ fades | 62% | 37 | 0.21 | ⚠ differs |
| JPM JPM | SHORT | -0.8% · 5d -1.5% | 61% | 40 | 0.20 | ✓ matches cascade |
| MSTR MSTR | SHORT | -2.5% · 5d -2.9% | 62% | 37 | 0.19 | ✓ matches cascade |
| XLF XLF | SHORT | -1.3% · 5d -1.3% | 59% | 37 | 0.18 | ✓ matches cascade |
| COIN COIN | LONG | +1.6% · 5d +5.7% | 60% | 9 | 0.17 | ⚠ differs |
| Gold XAU | LONG | +1.3% · 5d +0.4% | 58% | 37 | 0.15 | · |
| Volatility VIX | SHORT | -0.7% · 5d +5.5% ↺ fades | 56% | 38 | 0.12 | ⚠ differs |
| QCOM QCOM | SHORT | -2.0% · 5d -2.2% | 58% | 38 | 0.10 | ✓ matches cascade |
| Bitcoin BTC | LONG | +1.8% · 5d -2.8% ↺ fades | 56% | 16 | 0.10 | ⚠ differs |
| TSM TSM | LONG | +0.3% · 5d -1.4% ↺ fades | 55% | 37 | 0.08 | ⚠ differs |
| US dollar DXY | LONG | +0.3% · 5d +0.1% | 55% | 40 | 0.08 | · |
| XLK XLK | LONG | +0.7% · 5d -0.3% ↺ fades | 51% | 37 | 0.01 | ⚠ differs |
Why this probability
Basis-trade huge but actively monitored; flash crash possible over 3yr, true seizure rare. A base‑rate‑anchored prior, continuously scored against what actually happens — not a forecast.