**The strong 94.8% market-implied probability for "No" on a VEI ≥6 eruption in 2026 rests on the documented rarity of these colossal events and the complete absence of any activity approaching that threshold through mid-August.** VEI 6+ eruptions, which eject roughly 10 km³ or more of material and produce plumes exceeding 25 km, occur on average only once every several decades to a century based on the geologic record—the most recent was Pinatubo in 1991. Current global monitoring by agencies such as the USGS and Smithsonian Global Volcanism Program shows only modest ongoing or episodic activity at volcanoes like Sakurajima, Kīlauea, and Fuego, all well below VEI 4. With more than half the year elapsed and no signs of rapid magma accumulation or caldera unrest at high-risk systems, traders see little realistic pathway for escalation before December 31. That said, the outcome remains theoretically possible if an unmonitored or rapidly evolving system such as Taal or a remote caldera undergoes sudden pressurization undetected until the final months.