What if a single client bug stalls Ethereum finality?
A dominant execution-client bug stalling Ethereum finality exposes client monoculture — ETH -5% as stakers reprice slashing/liveness risk and the move bleeds to broad risk (this one is tagged RISK-OFF, so the small Nasdaq drag is directionally coherent). Closest rhyme is past Geth-supermajority scares where a single client bug threatened finality. The durable risk is concentration: until execution-client share diversifies, every such bug is a systemic, not isolated, ETH event.
Every number ships with its receipt — the odds, the range, the precedents, and a public grade at Reality Check. The statistical machinery that produces it is proprietary.
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 (electric blue) over time vs the market's (Polymarket, amber), 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. Loading the probability audit trail…
What it would mean
If this plays out, it is a risk-off shock. A dominant execution-client bug stalls Ethereum finality for hours, exposing dangerous client monoculture and spooking stakers. The trigger decomposes into signed root‑shocks — Crypto confidence ▼ · Risk appetite ▼ — which propagate through our causal graph to the markets below.