Traders have converged on the $800–900 billion range for Elon Musk’s net worth on October 31 because his holdings—primarily a roughly 38% stake in SpaceX and nearly 11% of Tesla—have settled in that band after recent closes, with Tesla shares trading near $400 and SpaceX around $135–150. SpaceX’s June 2026 Nasdaq listing and subsequent volatility tied to artificial intelligence integration via xAI, alongside Tesla’s electric vehicle and autonomy updates, continue to drive the bulk of value swings, while smaller stakes in Neuralink and The Boring Company add limited upside. The strong consensus reflects real-capital positioning around current equity levels rather than speculation on near-term catalysts. A sharp end-of-day rally in either stock or an unexpected regulatory or merger development could still push the final tally above $900 billion, though sustained gains would be required to overcome the current weighting.