Markets & Finance risk-off · 0–6 months
A what‑if from the future

What if US, European and UK sovereign bonds sell off simultaneously?

A sharp, correlated sell-off in US, euro-area and gilt sovereigns inflicts mark-to-market losses on bank rates desks and collateral pools simultaneously.

4%
our model probability
over 0–6 months
prediction markets — the market's odds
loading live odds…
Anchored to measured history 4% · 90% range 0–9% · 40 dated precedents behind it — a wider range means thinner evidence

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…

loading the timeline…

What it would mean

If this plays out, it is a risk-off shock. A sharp, correlated sell-off in US, euro-area and gilt sovereigns inflicts mark-to-market losses on bank rates desks and collateral pools simultaneously. The trigger decomposes into signed root‑shocks — Credit spreads ▲ · Real yields ▲ · Risk appetite ▼ — which propagate through our causal graph to the markets below.

Methodology. Probability and impact are anchored to history and scored against what actually happens — wins and losses, in public, at Reality Check. Market odds live from Polymarket & Kalshi. By Vikas Singh, Quantitative Strategist. Updated 2026-08-13.