Prediction markets are pricing in a significant likelihood that Tesla Inc. (NASDAQ: TSLA) and Space Exploration Technologies Corp. (NASDAQ: SPCX) will merge before 2028. Data from regulated prediction platform Kalshi shows the probability of the deal finalizing by the end of 2027 has risen to 71%, up from an earlier estimate of 65%. Meanwhile, Polymarket assigns a 55% chance to the same outcome.

Market Probability Shifts

The divergence in short-term expectations is evident in Polymarket’s data for a 2026 completion. The probability of a merger by December 31, 2026, has fallen sharply to 20% from a high of 57% recorded in May. This contraction suggests market participants view a near-term closure as increasingly unlikely, pushing the expected timeline into 2027 or later.

Catalysts and Corporate Context

JPMorgan noted in July that discussions around a combination have become more practical, identifying SpaceX’s record-breaking initial public offering as a key catalyst. The bank suggested the liquidity event could facilitate a larger corporate restructuring involving Tesla.

Elon Musk addressed speculation during Tesla’s second-quarter earnings call last month. He acknowledged growing collaboration between the entities but declined to discuss specifics, stating that any merger "has to go through the appropriate process." Palantir Technologies Inc. (NASDAQ: PLTR) co-founder Joe Lonsdale previously highlighted potential synergies, noting the companies would "definitely be collaborating."

Musk has a recent history of consolidating his ventures. Earlier this year, SpaceX acquired artificial intelligence startup xAI in an all-stock deal. In 2025, Musk merged social media platform X into xAI, valuing the combined entity at $80 billion.

What the Numbers Show

The widening gap between Kalshi and Polymarket probabilities highlights differing interpretations of the merger timeline. While both platforms agree on a pre-2028 completion, Kalshi’s higher aggregate probability (71%) versus Polymarket’s (55%) suggests varying confidence levels among distinct trader bases regarding regulatory and operational hurdles.

Stock Price Action

SpaceX shares closed at $146.23 on Monday, up 4.45% during regular trading hours. In after-hours trading, the stock dipped 0.25%. Tesla shares fell 0.87% to close at $339.40. Benzinga’s Edge Stock Rankings indicated a strong trend for SPCX across short-, medium-, and long-term horizons.

Tesla Inc. (NASDAQ: TSLA) is reportedly preparing to launch its purpose-built Cybercab robotaxi in Austin, Texas, potentially as soon as this month. Reuters reported on Monday that the company has informed employees it could begin rolling out the vehicles by first offering rides on public roads. The company may add the vehicles to its robotaxi service in Austin just days later.

Testing and Deployment Stages

Tesla has been preparing for the launch through several stages of testing. The company conducted test drives, provided employees with rides on private roads, and trained local first responders ahead of the potential deployment. Tesla began testing the production version of the Cybercab on public roads in June. Production is expected to increase later this year.

The Cybercab is designed specifically for autonomous driving and does not have conventional driving controls such as a steering wheel or pedals. However, Tesla Board Chair Robyn Denholm said last year that the automaker remains open to equipping the Cybercab with traditional vehicle controls.

During the company’s second-quarter earnings call, Tesla CFO Vaibhan Taneja said, "We’ve started doing Cybercab rides in our factory in Austin."

Competitive Landscape

A commercial Cybercab rollout would represent an important test of Tesla’s autonomous-driving ambitions. Elon Musk has repeatedly promoted robotaxis as a potential major growth opportunity for the electric vehicle maker.

Meanwhile, Alphabet Inc.’s (NASDAQ: GOOGL) (NASDAQ: GOOG) Waymo last week said it has secured California approval to significantly expand its driverless ride-hailing operations. This allows the company to scale across the San Francisco Bay Area and Los Angeles while entering Sacramento and San Diego. Waymo now provides more than 500,000 fully autonomous electric rides each week and has logged more than 220 million rider-only autonomous miles.

In June, JPMorgan noted that Waymo has 640 autonomous vehicles registered in Texas, compared with 84 for Tesla, despite Tesla expanding its robotaxi operations beyond Austin to Dallas and Houston this year. The firm said the disparity may reflect Tesla’s deliberate focus on software development and readiness rather than rapid expansion of its autonomous fleet.

What the Numbers Show

The data highlights a strategic divergence between Tesla and Waymo regarding fleet deployment versus software readiness. While Waymo operates a significantly larger registered fleet in Texas (640 vehicles vs 84 for Tesla), JPMorgan attributes this gap to Tesla’s deliberate focus on software development. This suggests Tesla prioritizes operational readiness and software maturity over rapid fleet scaling in its current autonomous strategy.

Market Reaction

Tesla closed at $339.30, down 0.87% on Monday. The shares were up 0.16% to $339.84 in after-hours trading, according to Benzinga Pro. Benzinga Edge ranks Tesla stock in the 55th percentile for Quality, with its short-, medium- and long-term price trends all remaining negative.