Prediction Markets Put 71% Odds on Tesla-SpaceX Merger by 2028

Prediction markets now price a 71 percent chance that Elon Musk combines Tesla and SpaceX before 2028, even as near-term odds collapse.

Kalshi traders now price a 71 percent chance that Elon Musk merges Tesla Inc. and SpaceX before 2028, up from 65 percent, while Polymarket assigns 55 percent odds of a combination by Dec. 31, 2027.

"The market is pricing in the analysts being right and a signature landing close behind the talk," said Dan Ives, managing director at Wedbush Securities, who has floated 80 to 90 percent odds of a tie-up by early 2027.

The near-term window tells a different story. Polymarket odds of a combination by the end of 2026 have fallen to 20 percent from a high of 57 percent in May, and Kalshi's ladder prices a signed deal before December at just 17 cents. SpaceX shares closed 4.45 percent higher at $146.23 on Monday before easing 0.25 percent after hours, while Tesla fell 0.87 percent to $339.40.

A merger would rank among the largest corporate consolidations on record, combining a roughly $1.85 trillion SpaceX with a $1.6 trillion Tesla. Both companies are now public — SpaceX listed on the Nasdaq under SPCX on June 12 — making a stock-for-stock swap cleaner than the old public-plus-private setup, though a contested exchange ratio and national-security review remain hurdles.

The Settlement Bar Is Higher Than the Talk

The gap between market pricing and the models comes down to what the contract actually pays. Kalshi's event resolves only when a definitive, binding merger agreement is officially announced through a press release, an SEC filing, an earnings call, or a company-confirmed statement — not on analyst notes or Musk hints. An AI model panel run price-blind on Aug. 16 landed below the market at every rung, putting a coin flip, not seven-in-ten, on the 2028 finish. The panel's blend sat at 11 percent for a deal before December and 16 percent before Jan. 1, 2027, versus market prices of 17 cents and 23 cents.

Musk has a history of consolidating his companies. SpaceX absorbed artificial intelligence startup xAI in an all-stock exchange in February, and he merged social media platform X into xAI in 2025. On Tesla's July 22 earnings call, Musk said the companies have "more and more overlap" and that any combination "has got to be done with the appropriate process." SpaceX president Gwynne Shotwell hinted on June 12 that a merger might make Musk's life easier.

Two Trillion-Dollar Balance Sheets, One Contested Ratio

The bull case rests on deepening business ties. The companies are building a $55 billion joint "Terafab" chip plant and have hundreds of millions of dollars in battery and vehicle purchases flowing between them. JPMorgan said in July that the conversation has become more practical, viewing SpaceX's record-breaking IPO as the biggest force pushing a combination closer to reality. Palantir Technologies co-founder Joe Lonsdale said earlier this year that the companies would "definitely be collaborating."

The bear case is about friction. Morningstar has flagged the exchange ratio between two similarly sized public shareholder bases as potentially deal-preventing on its own. SpaceX is a major U.S. defense contractor while Tesla runs large operations in China, inviting national-security review. Two rungs of the same Kalshi ladder, before July and before August, have already settled No.

A signed deal before December is a long shot at 17 cents on the market and about 11 percent to the models. The likeliest path, per the panel, is Musk completing his single-holding-company arc after xAI's absorption, announced alongside an earnings event — more probably a next-year signature than a 2026 one. A regulatory filing or confirmed banker engagement would push every rung up sharply; a CFIUS review opening or a public breakdown over terms would push them down.

This article is for informational purposes only and does not constitute investment advice.