Trader sentiment for one VEI ≥4 eruption in 2026 (41.5% implied probability) reflects the low global baseline rate of roughly one to two such events annually, combined with 2026 observations to date showing mostly VEI 2–3 activity. Smithsonian Global Volcanism Program records indicate two continuing eruptions (Semeru, Manam) reached VEI 4 earlier in the year, while recent October unrest at Lewotobi Laki-laki and Anak Krakatau produced ash plumes to 15–18 km without confirmed VEI classification or stratospheric sulfur injection. National agencies (PVMBG, VMGD) and satellite monitoring report elevated seismicity and SO2 emissions but no rapid escalation signals ahead of year-end. This uncertainty, plus typical late-year quiescence patterns, keeps zero or one additional large eruption as the consensus range, with higher counts requiring unexpected intensification at multiple systems.