SpaceX Stock Plunges 16% in a Single Day, Wiping Out Over $400 Billion in Market Cap
Miles Bennett
SpaceX plunged 16.43% less than two weeks after its IPO, erasing $400.8 billion in market value — the second-largest single-day wipeout in U.S. history — after confirming a debt deal tied to Musk's xAI.
How far did it fall — and where does that leave it?
SpaceX closed Monday at $154.60, falling below its IPO-day close of $160.95. This means → every investor who bought after the first day of trading is now underwater.
The single-day loss of $400.8 billion is the second-largest one-day market-cap wipeout ever recorded for a U.S.-listed company.
Post-close market cap dropped to $2.04 trillion, just below TSMC's $2.06 trillion, pushing SpaceX down to seventh place globally.
What triggered the sell-off?
The immediate catalyst: SpaceX confirmed plans to issue senior unsecured notes — a type of corporate bond requiring no collateral — to repay a $20 billion bridge loan.
The origin of that loan is the real issue. It was originally taken on to cover debts accumulated by xAI, CEO Elon Musk's AI venture. In plain terms = a freshly public company is issuing debt not for its own operations, but to settle bills from the boss's side project.
This reflects a systemic concern about related-party transactions and whether SpaceX's capital serves its own business first.
It has plenty of cash — so why borrow?
SpaceX disclosed $100.8 billion in cash and equivalents on the same day, with over $85 billion coming directly from IPO proceeds.
Choosing to issue debt despite ample cash on hand signals a capital-allocation priority that unsettled investors. This means → the market suspects IPO funds are not being directed toward SpaceX's core business first.
Put simply = sitting on a mountain of cash but borrowing fresh money to repay someone else's debt is exactly the kind of move that erodes trust.
Can the Reflection AI compute deal restore confidence?
SpaceX also announced a compute-supply agreement with Reflection AI, an AI startup building open-source models. Starting July, the deal brings in $150 million per month through the end of 2029.
But an exit clause undercuts the headline figure: after the first three months, either side can terminate with 90 days' notice. This means → the revenue stream is far less predictable than the contract term suggests.
This reflects SpaceX's attempt to build a new AI-revenue narrative, but under the shadow of the debt controversy, the market is not yet buying in.
Less than two weeks public — what is the core tension?
The fundamental contradiction: SpaceX's lofty IPO valuation rests on growth expectations, yet its first major post-listing move was repaying a related party's debt, not reinvesting in its own operations.
No earnings report has been filed yet. This means → investors can only read management's intentions through capital flows — and the current signal is negative.
In plain terms = investors paid a premium for a ticket labeled "worth a fortune tomorrow," only to discover the money is being used to plug someone else's hole. Once a trust crack appears, only real operating results can seal it back up.
Content is for reference only, not financial advice.