What if the ECB triggers its anti-fragmentation bond-buying tool?
Activating TPI to cap a periphery blowout is the tell that BTP-Bund stress is already acute: the trade is short EU financials and HY credit as fragmentation risk leaks, with peripheral spreads the cleanest instrument. Rhymes with the July 2022 TPI unveiling and the 2012 OMT 'whatever it takes' — both compressed spreads but exposed the tool's conditionality. Forward: with QT ongoing and PEPP reinvestments gone, the ECB's backstop is thinner than 2012.
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. The ECB activates Transmission Protection Instrument bond-buying to cap a peripheral spread blowout, exposing the limits of its anti-fragmentation tool. The trigger decomposes into signed root‑shocks — Credit spreads ▲ · Fed policy path ▼ — which propagate through our causal graph to the markets below.