Will the Iranian regime fall by March 31?

Reasoning

The evidence indicates Iran is under severe stress from a US-Israel air campaign that has killed Supreme Leader Khamenei and other top leadership including Ali Larijani. However, multiple sources confirm the regime has not collapsed. Al Jazeera analysis from March 17, 2026 explicitly addresses why the regime did not collapse after Khamenei's assassination, noting that ideological regimes facing external existential threats may harden rather than collapse. Polymarket consensus prices a 99.5% probability against collapse by March 31. With only one day remaining until the deadline (March 31), and the regime still functioning despite unprecedented leadership losses, collapse within this timeframe is extremely unlikely. The Reddit analysis also suggests residual revolutionary regime structures will remain intact. While the probability of 'Yes' is slightly elevated above baseline due to the extraordinary circumstances (leadership assassinations, ongoing military campaign), the near-term deadline and regime resilience make collapse by March 31 highly improbable.

Key Factors

• •Khamenei assassination did not trigger immediate regime collapse per Al Jazeera analysis
• •Polymarket consensus at 99.5% against collapse by March 31
• •Ideological regimes tend to harden under external existential threats
• •Only one day remaining until deadline with regime still functioning
• •US-Israel air campaign ongoing but insufficient to trigger collapse
• •Ali Larijani also assassinated but regime structure persists