TEHRAN / THE EXCHANGES — If the wagering public is to be believed, the Islamic Republic stands on the cusp of its most consequential transition since 1989. Prediction markets on Kalshi, where the question settles only upon the Supreme Leader's death, are pricing that event at 66% probability before January 2045 — a figure that speaks less to distant possibility than to near-term expectation. With some $114,000 in fresh volume changing hands in a single day, this is not idle speculation.

Ali Khamenei, who has helmed the Islamic Republic since Ayatollah Khomeini's death thirty-five years ago, is eighty-five years old and has been the subject of persistent health rumours. The Supreme Leader commands Iran's armed forces, nuclear programme, and judiciary — a consolidation of power that makes his succession the single most consequential unknown in Middle Eastern geopolitics. Market consensus assigns no single successor a commanding share, meaning the scramble, when it comes, could prove destabilising far beyond Iran's borders.

Should Khamenei's health stabilise or a clear heir emerge to steady the system, these odds could retreat sharply.