• Elon Musk became the world's richest person again on Thursday, according to Bloomberg.
  • Musk is now worth about $200 billion, while Bezos' net worth is $194 billion.
  • Both CEOs have seen their wealth explode as shares of Amazon and Tesla have surged upward.

Elon Musk once again overtook Jeff Bezos to reclaim the title of the wealthiest person on the planet Thursday, according to Bloomberg's Billionaires Index, thanks to a new SpaceX valuation that bumped its founder's wealth by another $11 billion.

Bloomberg now estimates Musk's wealth at $200 billion, with Bezos trailing behind at $194 billion.

Musk - CEO of Tesla, SpaceX, and a fistful of other ventures - now tops the list for the second time this year after his space company raked in another $850 million in funding, boosting the firms valuation to $74 billion, Bloomberg reports.

Daily fluctuations in Tesla and Amazon stock mean that the two billionaires regularly leapfrog over one another to reclaim the "world's wealthiest" title. Gaining or losing a ten-figure sum that would be life changing for any normal person is just another day in the life of the CEOs of two of America's largest companies. Because most of it is directly tied to equity, little of their wealth is in readily spendable cash.

A Tesla stock rally on January 7 boosted Musk's net worth by the several billion dollars needed to overtake Bezos and become the wealthiest person on Earth for the first time. But after Tesla shares tumbled about 2% in mid-February, wiping nearly $5 billion from Musk's fortune in the process, Bezos briefly took the lead. However, Amazon shares remain below September highs, keeping the CEO's fortune somewhat muted.

Both executives have seen their wealth balloon dramatically in recent years as shares of Amazon and Tesla have skyrocketed to extraordinary heights. Tesla's stock price surged by more than 700% in 2020 alone, earning Musk nearly $140 billion as the pandemic put millions of people out of work and killed hundreds of thousands in the US, according to Bloomberg.