--- title: "As Elon Musk's SPCX IPO Makes History, Mark Zandi Warns Of A 'Massive Threat' To AI Optimism And Markets" type: "News" locale: "en" url: "https://longbridge.com/en/news/289750231.md" description: "Moody's chief economist Mark Zandi warns that a sudden US ban on Anthropic AI models poses a 'massive threat' to market optimism and the economy. This regulatory crackdown, driven by national security concerns, occurred on the same day as SpaceX's historic IPO, which became the largest in history with shares surging over 19%. The juxtaposition highlights tensions between Silicon Valley expansion and state control, with Zandi advising cautious optimism regarding AI investments." datetime: "2026-06-15T07:22:22.000Z" locales: - [zh-CN](https://longbridge.com/zh-CN/news/289750231.md) - [en](https://longbridge.com/en/news/289750231.md) - [zh-HK](https://longbridge.com/zh-HK/news/289750231.md) generator: "portal-rs" --- # As Elon Musk's SPCX IPO Makes History, Mark Zandi Warns Of A 'Massive Threat' To AI Optimism And Markets Moody's Analytics chief economist **Mark Zandi** has warned that a sudden White House crackdown on Anthropic‘s frontier AI models highlights a hidden "threat" capable of derailing the broader stock market and economy, clashing directly with **Elon Musk**‘s **Space Exploration Technologies Corp.** (NASDAQ:SPCX) IPO on the same day. ## **Economic Implications** The collision of these two massive events highlights a growing tension between Silicon Valley’s commercial expansion and state control. Zandi took to X to warn that forcing Anthropic to pull its frontier models poses a “massive threat to that optimism, and by extension, the stock market and economy.” The abrupt shutdown has already triggered a fierce geopolitical backlash, with European Commission officials warning that contingency measures “should not be discriminatory against partners.” While Anthropic—which recently filed confidentially for its own IPO—works to remediate the safety flaws, the weekend’s whiplash serves as a stark reminder of regulatory vulnerability. As Zandi concluded, “Optimism over AI is warranted, but the cautious kind seems wisest.” > It's tough to ignore the seeming tension that on the same day (last Friday) that SpaceX went public, the U.S. government slapped export controls on Anthropic's Mythos and Fable LLMs. The SpaceX IPO is the largest in history, by 3x, and embodies the runaway optimism over AI's… > > — Mark Zandi (@Markzandi) June 14, 2026 **Read Also: SpaceX IPO (SPCX): Why This Could Be The Biggest Trading Story Of 2026 According To Financial Markets Analyst At Exness** ## **The Regulatory Hammer** Citing urgent national security concerns, the **Donald Trump** administration slapped strict export controls on Anthropic's newly released Mythos 5 and Fable 5 large language models (LLMs). The emergency directive forced the $965 billion startup to disable access for all non-U.S. citizens overnight. The sudden intervention reportedly followed warnings from **Amazon.com Inc.** (NASDAQ:AMZN) CEO **Andy Jassy**, after researchers found the advanced models could be manipulated to assist in sophisticated cyberattacks. ## **SPCX Lists On Bourses** The regulatory shockwave stood in stark contrast to the historic public debut of SPCX on the exact same day. Zandi noted that the SpaceX IPO became “the largest in history, by 3x,” a milestone symbolizing unbridled investor enthusiasm for the future of tech. SpaceX shares opened at $150.00 apiece, an 11.1% premium to the IPO price of $135, and closed its regular trading session 19.3% higher at $160.95. The stock traded in a wide range of $149.34 to $176.52 on its listing day, pushing its overall market valuation past the $2 trillion mark. **Read Also: SpaceX, Super Micro Computer, Micron And More: 5 Stocks Investors Couldn't Stop Buzzing About This Week** ***Disclaimer:*** *This content was partially produced with the help of AI tools and was reviewed and published by Benzinga editors.* *Photo courtesy: IAB Studio on Shutterstock.com* ### Related Stocks - [SPCX.US](https://longbridge.com/en/quote/SPCX.US.md) - [ANTH.NA](https://longbridge.com/en/quote/ANTH.NA.md) - [SPCH.US](https://longbridge.com/en/quote/SPCH.US.md) - [SPCF.US](https://longbridge.com/en/quote/SPCF.US.md) - [SPAL.US](https://longbridge.com/en/quote/SPAL.US.md) - [SNK.US](https://longbridge.com/en/quote/SNK.US.md) - [SSPC.US](https://longbridge.com/en/quote/SSPC.US.md) - [SPCU.US](https://longbridge.com/en/quote/SPCU.US.md) - [MCO.US](https://longbridge.com/en/quote/MCO.US.md) - [AMZN.US](https://longbridge.com/en/quote/AMZN.US.md) - [SMCI.US](https://longbridge.com/en/quote/SMCI.US.md) - [MU.US](https://longbridge.com/en/quote/MU.US.md) ## Related News & Research - [SpaceX Hits Troubling Snag in $322 Billion AI Push](https://longbridge.com/en/news/298633573.md) - [SpaceX signs $1 billion-a-month AI hosting deal](https://longbridge.com/en/news/298649759.md) - [Waverly Advisors LLC Makes New $4.50 Million Investment in SpaceX $SPCX](https://longbridge.com/en/news/298705863.md) - [SpaceX Stock Rises. Analyst Sets $220 Target With 49% Upside](https://longbridge.com/en/news/298356529.md) - [SpaceX Was ‘Nowhere’ in AI 6 Months Ago — Now It’s an Anthropic Rival After the $60 Billion Cursor Deal, Says Oppenheimer](https://longbridge.com/en/news/297900623.md) --- > **Disclaimer: This article is for reference only and does not constitute any investment advice.**