ARK Invest Recap: The Brainstorm 154 on the Tesla Roadster, a Possible SpaceX Merger and AI Growth

The latest full video on ARK Invest's official YouTube channel, "The Real Reason Tesla Announced The Roadster | The Brainstorm 154", was published on October 21, 2026 and runs about 30 minutes. The Brainstorm is ARK's weekly show of quick takes on tech and markets, and this week hosts Sam and Brett talked about the new Tesla Roadster unveil, the chance of a Tesla and SpaceX merger, a rough week for some AI-related investments, and the very fast revenue growth reported for the AI company Anthropic. The conversation was recorded on Monday, October 19, so events since then may have changed the picture.

This is an independent summary written by GNOUP. It is not affiliated with, sponsored by or endorsed by ARK Invest, WOLF, Public or anyone who appears in the video. The views, forecasts and claims described below belong to the speakers, not to GNOUP. Nothing here is investment, financial or tax advice, and nothing here is a recommendation to buy or sell anything. Forecasts can turn out to be wrong, and past performance does not guarantee future results. Please consult a licensed financial professional before making financial decisions.

Key takeaways

• The Roadster event may have been about more than a car. Brett, who attended the unveil in person, said he thinks the event was at least partly marketing for a possible Tesla and SpaceX merger. He also said the car itself will not matter much to Tesla's near-term or medium-term finances.
• A merger announcement was seen as likely soon. Brett pointed to a few signs he read as hints, and one host said he would not be surprised if the combined company were split roughly evenly between Tesla and SpaceX shareholders. These were guesses, not confirmed facts.
• AI-related investments had a bumpy week. The hosts discussed CoreWeave's shares falling and its bonds trading at around a 15% yield after being issued at 9%. One host said he saw no sign that demand for computing chips had softened.
• Anthropic's growth is slowing from a huge pace, but is still huge. The hosts discussed reported figures, which they noted may be rumors until the company publishes official numbers, and argued it is still one of the fastest-growing businesses on record.
• A non-consensus view on AI competition. One host argued that the big "closed" AI labs may pull further ahead of open-weight competitors rather than be caught up. He said he has not seen evidence that business is shifting toward open-weight models.
• Market views are uncertain by nature. Several points in the video, such as why shares moved and what happens next, were the speakers' best guesses, and they said so.

Newsworthy investment insights

These are opinions, forecasts and claims voiced in the video. GNOUP has not independently checked them. Neither ARK's statements nor ours are a recommendation about any security.

Tesla, SpaceX and a possible merger (opinions and predictions)

• The Roadster. Brett, who was at the unveil, said that, seen in person, the car's stunts did not look real, and that its rocket-thruster and downforce-fan features are not something he thinks rivals such as Ferrari or Porsche could copy. He said buyers would pay "$250,000 a pop" for it, but that it would not move Tesla's financials much. He also argued that "spiky" and unusual projects help keep a company's best designers and engineers motivated, and called that part of how Elon Musk keeps his companies "on the edge".
• Merger timing. One host said a prediction market (the automatic transcript garbles its name) gave about a 75% chance of a merger by the end of the year. The speaker answering said he believed the event timing was intentional and cited what he took as hints: some SpaceX executives following Tesla accounts on X over the weekend, and the order of the two companies' earnings calls being swapped so SpaceX goes first, one day before Tesla. He added that any announcement would need enough time before Tesla's annual shareholder meeting for a vote. He said he would not be surprised if a deal was announced that week. These are his reading of signals, not confirmed information.
• Why they think a deal makes sense. One host said ARK is very optimistic about both companies on their own and believes a combination would give better returns to both groups of shareholders at almost any reasonable exchange ratio. He described SpaceX as limited by cash despite what he called an "extraordinarily high" return on its investments, and Tesla as about to start generating a lot of cash from its robotaxi network. He said he sees the humanoid robot program, Optimus, as limited by execution rather than money.
• A very big forecast. One speaker said the combined company could be the most valuable in the world, and that under some assumptions it could be worth more than "a hundred trillion dollars" in enterprise value. That is a scenario the speaker described, not a prediction GNOUP can verify.

CoreWeave, AI shares and market stress (opinions)

• One host said several AI-related stocks "went sideways" during the week. He said CoreWeave's bonds trade at around a 15% yield versus 9% when they were raised, and that this "is screaming for somebody to underwrite it", assuming the company does pay on those bonds.
• He said rental prices for the computing chips CoreWeave installs have risen and that "everybody is short compute", so he does not read the move as a sign of falling demand. He listed other possible causes, such as a company failing to deliver on its contracts, but said his own suspicion (Brett's, per the description) is that investors using a lot of borrowed money were being forced to sell. He said this was a guess. We have left out the speculation about specific funds because it is unconfirmed.
• The speaker said that if that is right, lending against shares of private AI companies could become more sensitive to how an expected Anthropic IPO is received. He described that as his reasoning, not a reported fact.

Anthropic's reported growth (claims, based on rumored figures)

• The hosts said that, based on reports, Anthropic's annualized growth went from about 3,500% year over year in one quarter to about 340% in the most recent one. They called the slowdown real but said the company is still growing faster than almost any in history.
• One host said 32 companies, by his count, have added more than 30 billion dollars of revenue over a year after adjusting for inflation, and only four of them did it by at least tripling revenue. He named Nvidia, Micron and Anthropic, and guessed OpenAI as another. He said Anthropic is growing by more than 10 times, and called it the most remarkable 12 months of business performance ever recorded in US markets, if the rumors prove true. He noted that the figures would be confirmed only when a formal filing is published.
• He also said, citing reports, that Anthropic's gross margin is about 85%, which he said gives it plenty of profit to spend on future computing capacity.
• On the slowdown, a host said a high single-digit percentage of the prior quarter's revenue was reportedly from companies trying to copy the model through its programming interface, and that Anthropic cutting that off may have trimmed revenue. He called that strategically good for the company even if it hurts the numbers slightly.

Will the leading AI labs pull away? (opinion)

• One host argued the leaders have models about six months ahead of everyone else, can use them at cost, and can shrink their best models into cheaper ones. He used a car comparison: a company that builds the Ferrari can also build the Honda Civic, but not the other way around.
• He said that enterprises choosing open-weight models to save money or keep control of their data may be making a "losing bet" because the cost per task could go up. He said the evidence for a shift to open-weight is thin, called token counts a poor measure, and said he would rather see how much computing capacity (gigawatts) goes to each kind. He added that some people pushing the other story may have reasons to.
• The other host agreed in principle but said that is not what markets are doing today, with buyers not as price-sensitive as they should be. The hosts also noted that big companies move slowly, which could leave room for fast-moving startups to take advantage of new AI capabilities.
• On SpaceX's AI plans, a host said it is likely trying to catch up but is currently behind and even rents out computing power to the leaders.

Lighter moments

• Asked whether they would reserve a Roadster, Sam said probably not. A host said a rocket-equipped version could become one of the most valuable collector cars ever, since he guessed only about 50 might exist, though a joking comment suggested some may be damaged by stunts.

Watch the video

The Real Reason Tesla Announced The Roadster | The Brainstorm 154 on YouTube (ARK Invest's official channel, published October 21, 2026)

Episode guide

Chapter times are taken from the video's own YouTube description. Select a time to jump to that point on YouTube.

• 0:00: Roadster
• 4:25: Tesla-SpaceX
• 8:17: AI Selloff
• 13:02: Anthropic Growth
• 17:00: AI Competition
• 26:55: Roadster Collectibility

About this summary

This recap was prepared from the video's title, description, chapter list and an automatically generated transcript. The transcript had no time markers or speaker labels, so we name the hosts, Sam and Brett, only where the video or description makes it clear (for example, Brett attending the unveil), and use "a host" elsewhere. Automatic transcripts can contain errors, so some names, numbers and phrases may differ from what was said. We did not check any figures, forecasts or claims made in the video. The video was recorded on October 19, 2026, before the SpaceX and Tesla earnings calls it mentions, so later developments are not covered. The video's own disclosure says statements about companies and securities are the beliefs and points of view of ARK or its guests, are not recommendations to buy, sell or hold any security, and that ARK and its clients or related persons may have financial interests in securities or issuers discussed. GNOUP has no connection to ARK, WOLF, Public or their products or offers and does not endorse them. This article is general information only. It is not investment, financial or tax advice, it does not recommend buying or selling any security or asset, and it is not a substitute for advice from a licensed financial professional.