Tesla Shares Slide 18% While Musk Promises A Season Of New Machines

Musk stages Semi and Roadster events while Tesla stock sits 18% lower in 2026 and robotaxi doubts persist. (Image: Shutterstock)
Musk stages Semi and Roadster events while Tesla stock sits 18% lower in 2026 and robotaxi doubts persist. (Image: Shutterstock)

Tesla shares are down about 18% in 2026, and analysts warn that a fall lineup of Elon Musk's product events may not deliver what investors actually want.

Key Points:

  • Tesla will open its Semi factory in Nevada on Sept. 24 and unveil the Roadster on Oct. 1.
  • Analysts say robotaxi growth, Optimus progress and cash flow matter more to investors than new vehicles.
  • Goldman Sachs cut its third-quarter delivery forecast to 435,000 vehicles from 490,000.

Tesla Product Events

Tesla stock has slipped about 18% so far this year, while the S&P 500 has gained 11% over the same period. The weak run comes as the company lines up a busy fall calendar. It already hosted a Cybercab launch event this month.

Next, Tesla will open its Semi truck factory in Sparks, Nevada, on Sept. 24, according to invitations it sent to guests. It plans to unveil the second-generation Roadster in Waco, Texas, on Oct. 1, almost nine years after both vehicles debuted as concepts.

Also Read: Tesla Stakes Its Oct. 1 Roadster Reveal Against Wall Street's Margin Math

Robotaxi Expectations

Analysts doubt the new hardware will shift sentiment, even as Morgan Stanley analyst Andrew Percoco estimates Semi trucks could bring in $17 billion in software revenue by 2040. Garrett Nelson of CFRA said he was skeptical the Semi or Roadster would do much to lift investor enthusiasm. Andrew Rocco of Zacks Investment Research said investors want to see robotaxis in more cities.

Seth Goldstein of Morningstar called the Roadster a halo car and said sentiment depends on robotaxi expansion, tangible progress with Optimus humanoid robots and better free cash flow. The company currently runs its robotaxi service in six cities across Texas and Florida, plus supervised trips in San Francisco.

Near-term numbers add to the pressure. Goldman Sachs analyst Mark Delaney cut his third-quarter delivery forecast to 435,000 vehicles from 490,000, below the 456,000 consensus. Wall Street also expects negative free cash flow of $9.7 billion this year, according to FactSet data, as Tesla spends heavily on AI projects.

Tesla Stock Reactions

Competition sharpens those doubts. Investor Ross Gerber shared photos of hundreds of new Waymo robotaxis in Santa Monica, while federal regulators want Tesla to explain by Sept. 30 how its pedal-free Cybercab meets safety rules.

Earlier events this month set a cautious tone. Tesla shares dropped after the Sept. 3 Cybercab launch, erasing pre-launch gains, as some investors and analysts were disappointed with the vehicle. When Tesla confirmed the Roadster date over the Sept. 12 weekend, the stock closed the next session at $358.97, down 1.77%.

Read Next: Huawei Targets 1M-Processor AI Systems In Push Against Nvidia

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Aliasgar Juzar

Aliasgar is an associate writer at Yellow.com, covering crypto, AI, and the infrastructure underneath both. He started writing after having come from the other side of the industry, spending six years building and supporting developer tools at protocols including Ignite, Informal Systems, Akash and Warden, much of it inside the Cosmos ecosystem. He holds a master's in computer science, has shipped products of his own, and writes from Germany.

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