SpaceX's market value exceeds Tesla's by more than $800 billion.
So the first question isn't “Can they merge?” but “Who acquires whom?”
But what really makes this deal difficult to move forward are four major hurdles; the stock price has merely amplified the absurdity of one of them.
The toughest hurdle is national security review.
Tesla has its Shanghai Gigafactory, backed by local data, a local supply chain, and a local joint-venture structure.
SpaceX is a key contractor for the U.S. Department of Defense and NASA, and holds sensitive assets such as ITAR-controlled technology, security clearances, and Starshield.
Putting the two under the same entity would mean one company holding both U.S. military assets and a manufacturing base in China.
The CFIUS hurdle is almost impossible to avoid.
An August Reuters headline put it plainly: Tesla's China footprint complicates a merger.
Spin off the China business?
Extremely difficult to execute.
Rating: very high.
Timeline: without a spin-off, indefinite;
if they do spin it off, 12 to 18 months at a minimum.
Next is the exchange ratio.
Based on market capitalization, Tesla shareholders would get 41% of the merged company.
Based on revenue, Tesla contributes 82%.
Tesla shareholders won't accept 41%, and SpaceX shareholders won't accept 82%.
There's no comfortable middle ground.
Even harder is the valuation itself: SpaceX trades at 93.8 times sales, versus 14.75 times for Tesla.
SpaceX is also losing $8.9 billion, with free cash flow of -$32.5 billion.
Valuing SpaceX means putting a price on the future of “Starlink + Starship + AI compute.”
There's no comparable benchmark.
And one more recent development: Tesla's third-quarter operating profit was $718 million, down 56% year over year.
The side whose profitability is deteriorating will have a harder time securing a favorable ratio.
Rating: high.
Timeline: 3 to 6 months; if they can't agree, that's the end of it.
Now, governance.
Musk is the controlling shareholder on both sides. This is a classic related-party transaction, requiring an independent special committee and a fairness opinion.
The committee was formed on October 21, but forming one doesn't mean the parties can reach a deal.
The ownership structures are also asymmetric: SpaceX insiders own 45.14%, with only 18.9% in the public float;
Tesla insiders own 28.5%, with 71.5% in the public float.
How Musk's control changes after a merger, how minority shareholders are protected, and how board seats are allocated—any one of these could take months to resolve.
Rating: medium-high.
Timeline: 2 to 3 months for the fairness opinion.
Then there's the question of how the deal is characterized.
At $2.4 trillion versus $1.56 trillion, outsiders will say this is SpaceX acquiring Tesla, not an equal merger.
Once it's characterized that way, the chances of lawsuits by Tesla shareholders, class actions, and votes against the deal all rise.
Tesla has a high proportion of retail investors, making the vote result hardest to predict.
Rating: medium.
Timeline: the outcome should be clear in the first half of 2027.
There are also two technical hurdles that are easy to overlook but could cause delays.
First, index funds and passive capital.
With only 18.9% of SpaceX shares in the public float, its weighting would be sharply reduced after adjusting for free-float market capitalization.
The merger would create a giant with a $3.7 trillion market cap and very few tradable shares. Index funds would need to decide how to allocate, and the rules would have to change first.
Rating: low. Timeline: technical adjustments would be made 1 to 3 months before the deal takes effect.
Second, financing.
After the merger, free cash flow would be -$32.5 billion, alongside Tesla's $15.4 billion in annual capital expenditure.
With 10-year U.S. Treasury yields at 5.1%, the credit markets won't look kindly on financing that level of investment with debt.
CoreWeave's CDS is a cautionary tale. Rating: medium. Timeline: it depends on the bond market and could tighten at any time.
Antitrust is actually the least significant hurdle.
SpaceX and Tesla don't compete head-to-head in the same market, and the vertical integration rationale is plausible.
The SEC and FTC will review the deal, but the odds of a hard block are low. Rating: low. This would run in parallel with the other approvals.
From highest to lowest, the chances of a hard block are: national security review, exchange ratio, governance, shareholder vote, financing, indexes, with antitrust at the bottom.
The approximate timeline looks like this.
By December 2026: announcement of the framework. This is Barclays' expectation, not a statement from the company.
First quarter of 2027: exchange ratio and fairness opinion.
Second and third quarters of 2027: shareholder votes at both companies.
Second half of 2027 to 2028: CFIUS, China, and EU approvals.
The fastest path would be 12 to 18 months. It's not surprising if it stretches into 2028.
One last detail.
Most Chinese-language reports only say “confirmed the formation of a committee,” leaving out Musk's next words: not certain.
He himself said it wasn't certain and that shareholders would have to support it.
Wall Street says it's inevitable.
Both are right—the direction is inevitable, but the path isn't.
