Andrew Bailey, the governor of the Bank of England and president of the Financial Stability Board, has raised concerns about the potential risks posed by the rapid growth of artificial intelligence (AI) companies. In a letter to G20 finance ministers, he warned that a future market correction in the AI sector could have global consequences. His semi-annual report on financial stability highlighted several risks, including the possibility of a stock market bubble, increased cybersecurity threats, and the complexity of corporate debt, particularly among AI-focused firms. Bailey emphasized that the interconnected nature of global financial markets means a crisis in this sector could spread beyond national borders, especially given the fragility of sovereign debt markets. In response to growing concerns about AI-driven cyber threats, more than 100 companies—including major tech firms like OpenAI, Anthropic, Google, and Microsoft—have called for stronger collective action to enhance cyber defenses. These companies argue that the current state of security is inadequate to address the rising number of AI-based attacks. They urge defenders to be equipped with AI tools specifically designed to counter these threats, suggesting that proactive measures are essential to prevent future vulnerabilities. Bailey noted that the risks are not just about the amount of debt taken on by investors but also how that debt interacts with high stock valuations and market concentration. This interaction, especially between AI companies and "hyper scalers"—large tech firms with vast computing resources—could amplify the impact of a market correction. He expressed concern that a major economic shock, or a combination of multiple shocks, could trigger widespread vulnerabilities across the financial system. Over the past year, financial institutions have raised alarms about the extremely high valuations of AI-focused companies such as OpenAI, Anthropic, and Nvidia. These valuations, which often exceed what is considered their actual worth, are likened to a "bubble"—a term used to describe a rapid rise in asset prices that eventually collapses, leading to significant financial losses. The 2008 financial crisis, partly caused by a housing bubble, serves as a cautionary example of the dangers of such market imbalances. Nvidia, now the world's most valuable company with a market capitalization of $510 billion, is a prime example of this trend, as it supplies the powerful chips that drive AI systems like ChatGPT and Google's Gemini. OpenAI, which was recently valued at $852 billion, and Anthropic, valued at $965 billion, have also drawn attention for their soaring market values.