What if Moody's downgrades Belgium another notch to A2?
A Belgium notch to A2 is a non-event in isolation — OLO spreads widen a few bp and HY credit barely flinches; it only matters as a marker of broad euro-core fiscal drift. Rhymes with the slow 2011-13 drip of peripheral downgrades that mattered in aggregate, not singly. Belgium funds itself cheaply inside the euro and via domestic banks; the forward read is to watch whether France gets tarred next — that is the spread that actually moves European books.
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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 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. Loading the probability audit trail…
What it would mean
If this plays out, it is a risk-off shock. Moody's cuts Belgium a further notch to A2 as debt keeps climbing past 110% despite consolidation pledges and political gridlock. The trigger decomposes into signed root‑shocks — Credit spreads ▲ — which propagate through our causal graph to the markets below.