France's budget watchdog says that the 2027 growth forecast is overly optimistic

This is the standard pattern in which an independent fiscal council challenges the growth assumption underpinning a government budget, and the mechanism matters more than the headline: an optimistic growth forecast flatters projected revenues and the deficit path, so the watchdog's scepticism effectively implies a worse underlying fiscal position than the official numbers show. France's watchdog has a record of issuing such reservations, and on previous occasions the friction has mattered most when it fed into the wider debate over the credibility of the consolidation plan, since that is what ratings agencies and the European Commission's surveillance process respond to rather than to the growth debate itself. The transmission channel into OATs is the spread to core paper, which has historically been sensitive to French fiscal credibility disputes, with the benchmark itself largely trading off the broader euro rate backdrop. The distinction worth drawing is between a technical quarrel over a forecast, which tends to fade, and a finding that the deficit trajectory is off track, which invites follow-through from Brussels and the rating calendar. The tells are whether the government revises its assumptions, how the Commission frames its next assessment of the French path, and any agency commentary. Directionally a credibility negative for French paper rather than a standalone driver.