**Trader sentiment heavily favors zero VEI ≥4 eruptions in 2026 (67.5% implied probability), reflecting both historical patterns and the absence of qualifying events through early August.** Large explosive eruptions meeting the Volcanic Explosivity Index threshold of 4 or higher—ejecting at least 0.1 km³ of material with significant plume heights and tephra—occur only a few times per decade on average, per Smithsonian Global Volcanism Program records. Most 2026 activity has involved ongoing lower-intensity events at sites like Kīlauea, Iceland’s Reykjanes Peninsula, and various Indonesian volcanoes, none yet assigned VEI ≥4 by official monitoring. The year’s largest reported explosive episode remains a submarine event with limited global impact classification. With over half the year elapsed and no confirmed Plinian-scale activity, traders see limited upside for one or more such eruptions before year-end unless new unrest escalates rapidly at monitored calderas. Upcoming GVP updates and any major plume observations will be key resolution drivers.