What if China bars foreign chip engineers from leaving?
Barring foreign chip engineers from leaving is a hostage-style decoupling shock straight at the talent bottleneck: TSMC -6, Nasdaq -6, semis -5 as the human single-point-of-failure reprices. No clean analogue; China's 2023 exit bans on finance executives are the nearest, but applied to the chip supply chain the bite is far larger. Transmission hits TSMC, ASML service engineers, and US fabless staffing. Forward angle: this attacks the one input even reshoring can't quickly replace, so the semi de-rating could outlast a tariff headline.
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 0–6 months 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. China bars departure of foreign chip engineers, escalating decoupling into a hostage-style standoff. The trigger decomposes into signed root‑shocks — Geopolitical risk ▲ · Semiconductor supply risk ▲ · Trade tension ▲ — 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 | ▲ +9.1% hist +1.58–+8.89% · other way -1.95% (n=12) |
| 2 | Nasdaq 100 NDXon Hyperliquid 📈 chart | Index | ▼ -6.2% hist -3.39–-1.57% · other way -0.12% (n=12) |
| 3 | TSMC TSMon Hyperliquid 📈 chart | Equity | ▼ -5.7% hist -5.21–-0.95% · other way +1.17% (n=12) |
| 4 | Semiconductors SMHon Hyperliquid 📈 chart | Equity | ▼ -5.4% hist -3.52–-1.7% · other way +0.99% (n=12) |
| 5 | Nvidia NVDAon Hyperliquid 📈 chart | Equity | ▼ -5.3% hist -3.53–-1.02% · other way +3.31% (n=12) |
| 6 | Tech sector XLK 📈 chart | Equity | ▼ -4.3% hist -2.68–-1.55% · other way +0.3% (n=12) |
| 7 | ASML ASMLon Hyperliquid 📈 chart | Equity | ▼ -3.9% hist -4.7–-0.3% · other way -1.38% (n=12) |
| 8 | AMD AMDon Hyperliquid 📈 chart | Equity | ▼ -3.7% hist -2.39–-1.26% · other way -2.76% (n=12) |
| 9 | Broadcom AVGOon Hyperliquid 📈 chart | Equity | ▼ -3.7% hist -2.41–-1.06% · other way +5.2% (n=12) |
| 10 | Micron MUon Hyperliquid 📈 chart | Equity | ▼ -3.7% hist -4.55–-0.22% · other way -2.25% (n=12) |
| 11 | Marvell MRVLon Hyperliquid 📈 chart | Equity | ▼ -3.7% hist -2.76–-0.97% · other way -0.68% (n=12) |
| 12 | Qualcomm QCOMon Hyperliquid 📈 chart | Equity | ▼ -2.5% hist -3.96–+0.18% · other way -3.71% (n=12) |
| 13 | S&P 500 SPXon Hyperliquid 📈 chart | Index | ▼ -2.0% hist -2.33–-0.23% · other way +1.39% (n=12) |
| 14 | Intel INTCon Hyperliquid 📈 chart | Equity | ▼ -2.0% hist -3.68–+0.33% · other way -3.53% (n=12) |
Probable recommendation
Why we may diverge from history
Trust the cascade short on MSTR/AVGO: +13%/+10% is pure 2025-04 tariff-window clustering during BTC's bull — regime-contaminated; an engineer exit-ban hostage standoff won't reproduce that risk-proxy bounce.
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 |
|---|---|---|---|---|---|---|
| ETH ETH | SHORT | -6.8% · 5d -6.4% | 73% | 23 | 0.36 | ✓ matches cascade |
| CNY CNY | SHORT | -0.6% · 5d -0.3% | 67% | 29 | 0.33 | ✓ matches cascade |
| KWEB KWEB | SHORT | -2.6% · 5d -1.4% | 67% | 27 | 0.27 | ✓ matches cascade |
| NVDA NVDA | SHORT | -1.1% · 5d -3.4% | 69% | 29 | 0.26 | ✓ matches cascade |
| TRY TRY | SHORT | -1.0% · 5d +0.6% ↺ fades | 66% | 28 | 0.25 | ✓ matches cascade |
| XCU XCU | SHORT | -0.7% · 5d -0.5% | 64% | 29 | 0.24 | ✓ matches cascade |
| CL CL | SHORT | -2.4% · 5d -2.1% | 64% | 29 | 0.24 | ✓ matches cascade |
| Bitcoin BTC | SHORT | -4.2% · 5d -3.8% | 65% | 27 | 0.23 | ✓ matches cascade |
| FCX FCX | SHORT | -3.9% · 5d -1.8% | 63% | 30 | 0.22 | ✓ matches cascade |
| KRW KRW | LONG | +0.2% · 5d -0.3% ↺ fades | 63% | 28 | 0.22 | ⚠ differs |
| NDX NDX | SHORT | -0.5% · 5d -1.2% | 64% | 35 | 0.21 | ✓ matches cascade |
| AUD AUD | SHORT | -0.7% · 5d -0.4% | 61% | 28 | 0.18 | ✓ matches cascade |
| BABA BABA | SHORT | -1.0% · 5d -2.7% | 60% | 27 | 0.17 | ✓ matches cascade |
| INTC INTC | SHORT | -2.4% · 5d -1.8% | 58% | 37 | 0.16 | ✓ matches cascade |
Why this probability
Exit bans on chip engineers fit China's hostage-diplomacy pattern but formal ban escalatory, 6mo short. A base‑rate‑anchored prior, continuously scored against what actually happens — not a forecast.