Will Elon Musk's net worth on March 31, 2026 be above $640 billion?

Tesla's recent price action is decidedly bearish, with shares dropping 2.76% on Friday to $361.83 and slipping further in overnight trading to $360.50. This downward momentum actively widens the $3 billion gap Musk needs to cover, requiring a sharp and immediate reversal to hit the target. Time decay is the ultimate headwind for this market. With only two trading sessions remaining before the March 31 deadline, the mathematical probability of a sudden 3-4% reversal shrinks with every hour of flat or downward trading. Prediction markets are already pricing in this time decay, heavily favoring a miss. The Bloomberg Billionaires Index methodology typically lags on private company revaluations. Even if SpaceX files an IPO prospectus this week at the rumored $1.75 trillion valuation, Bloomberg is highly unlikely to adjust its index valuation before the strict Tuesday daily close. This leaves Musk entirely dependent on a struggling Tesla stock to cross the finish line.

Tesla's extreme volatility means a $3 billion net worth increase is mathematically trivial under the right conditions. Requiring roughly a 1.5% to 2.5% jump in TSLA stock, this move is entirely possible within a single trading session if broader tech indices rally or macroeconomic conditions improve. Rumors of an imminent SpaceX S-1 filing present a massive asymmetric risk to the upside. If Bloomberg decides to preemptively adjust Musk's private wealth based on these leaks or an official filing drops on Monday, his net worth would instantly shatter the $640 billion threshold regardless of Tesla's performance. Institutional support remains strong following the restoration of Musk's 2018 compensation plan. Any sudden positive PR regarding Q1 deliveries or early Cybercab regulatory approval could trigger a short squeeze, rapidly erasing the recent slide and pushing his net worth well above the target.