Will global headline inflation in G20 countries exceed 4.2% in 2026?

Why: The OECD’s official Economic Outlook (Volume 2026 Issue 1; published 3 June 2026) reports that “annual consumer price inflation in the G20 countries is expected to rise to 4.0% in 2026” (time‑limited disruption scenario). 4.0% is below the 4.2% threshold. The IMF materials in the supplied evidence discuss global inflation (e.g. 4.7% global headline inflation) but do not provide a contradictory G20 annual average in these pages. (Monthly OECD G20 year‑on‑year rates in April and May 2026 were higher — 4.3% and 4.5% — but those are month‑specific yoy figures, not the calendar‑year 2026 average reported in the OECD Outlook.)