US x Iran ceasefire by December 31?

Multiple ceasefire agreements already exist. The April 7-8 two-week truce mediated by Pakistan. The May 27-28 draft memorandum of understanding extending the ceasefire 60 days. The June 17 14-point MOU declaring an "immediate and permanent cessation of military activities on all fronts" with a 60-day negotiating window. The diplomatic infrastructure for a ceasefire has been built repeatedly — the question is whether any version of it survives intact through December 31. That's a different and harder question than whether a ceasefire gets signed. The 2026 Iran war has already produced multiple ceasefires that faced immediate stress from proxy activity, Iranian public denials of US-stated terms, and the inherent fragility of agreements that depend on all parties — including Hezbollah, the Houthis, and Iranian-aligned militias — maintaining compliance simultaneously. The resolution criteria requires an ongoing, formal ceasefire clearly recognized as halting major hostilities between the US and Iran by year-end — not a brief pause or a signed document that's been violated, but a sustained recognized truce. That specific threshold is what prediction markets are pricing below 50% despite multiple signed agreements, because the distance between "ceasefire announced" and "ceasefire holding through December 31" has proven meaningful every time this conflict has attempted it. Trump's formal sign-off on the MOU framework remains publicly uncertain. Iran has not officially confirmed the US account of the 14-point text. Regional proxies continue operations independent of whatever the US-Iran bilateral track produces. Each of those friction points is a potential ceasefire failure mode that has materialized in prior attempted agreements. Bottom line: The diplomatic pathway to a December 31 ceasefire is real and has been actively constructed through multiple agreements. Whether any version holds through year-end depends on implementation quality, proxy behavior, and whether the 60-day negotiating window produces the comprehensive framework that both sides have described as the goal. Watch whether the 60-day window produces specific, verifiable compliance steps — uranium handling, Hormuz normalization, proxy restraint — as the indicators that distinguish a durable ceasefire from another fragile pause.