The US-Iran ceasefire represents one of the most significant geopolitical developments of 2026, with current market odds of 14% reflecting trader sentiment that extension beyond April 18 remains unlikely despite ongoing diplomatic efforts. Ceasefire agreements between US-aligned and Iranian-backed forces depend on numerous factors including regional stability, ongoing negotiations, diplomatic channels, and the willingness of all parties to maintain compliance through mutual deterrence. The market resolves based on whether a formal extension or renewal of the ceasefire framework is announced and confirmed by April 18, 2026. Current price action suggests traders expect the ceasefire to expire as currently negotiated, with limited confidence in a negotiated extension beyond the initial timeframe. The low odds imply significant geopolitical risk—factors like escalating proxy conflicts, economic sanctions, domestic political pressure in both countries, or unexpected military incidents could prevent extension. Trading volume of $36,671 over the past 24 hours and $28,185 in available liquidity indicate moderate but meaningful interest in this outcome among prediction market participants. Traders should monitor official announcements from the US State Department, Iranian government officials, and UN mediation efforts for signals about extension negotiations and potential developments that could shift market sentiment.