Nvidia Announces Record $150 Billion Stock Buyback as AI Agent Security Concerns Mount

Reviewed byNidhi Govil

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Nvidia authorized a historic $150 billion stock buyback, bringing total repurchase capacity to $235 billion through fiscal 2028. The chipmaker simultaneously launched the Open Agent Safety Platform to prevent AI agents from going rogue, addressing mounting safety concerns after recent breaches at OpenAI and other frontier labs.

Nvidia Authorizes Historic $150 Billion Stock Buyback

Nvidia announced on Monday a record $150 billion stock buyback authorization, bringing its total share repurchase authorization to $235 billion through fiscal year 2028—the largest in corporate history

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. This follows an $80 billion addition to the buyback program just four months earlier

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. The move signals confidence in sustained cash flows as the dominant AI-computing infrastructure supplier continues capitalizing on the AI boom.

Jensen Huang, Nvidia's CEO and one of the world's top 10 billionaires, stated that the company's growth stems from "a once-in-a-generation platform shift to AI and accelerated computing"

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. The authorization reflects Nvidia's capacity to invest in advancing technologies while returning capital to shareholders

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Source: The Hill

Source: The Hill

Nvidia's Market Valuation Surges Toward $6 Trillion

Nvidia shares rose 2.9% on Friday, hitting a record for the first time since May and bringing market valuation to approximately $5.7 trillion

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. The company now sits less than $300 billion away from becoming the first company worth $6 trillion

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. This represents a rally of almost 25% from its late July low, after a two-month selloff had wiped more than $1 trillion off the company

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The stock is up about 27% this year, marking a fourth consecutive year of double-digit returns

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. Morgan Stanley analyst Joseph Moore restored Nvidia as his top semiconductor pick, citing "a very undemanding valuation"

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. During the second quarter of fiscal 2027, Nvidia reported $96.2 billion in revenue, up 106% year over year, and returned roughly $26 billion to shareholders through repurchases and dividends

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Open Agent Safety Platform Addresses AI Agent Security

Simultaneously, Nvidia unveiled the Open Agent Safety Platform, designed to prevent AI agents from going rogue

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. The platform includes open-source software called OpenShell that "sets boundaries for agents" and a security layer called Sentry that runs onboard a chip to continuously monitor AI agent activity

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Source: Decrypt

Source: Decrypt

Justin Boitano, Nvidia's vice-president of enterprise AI, stated the system could have prevented the recent incident involving OpenAI agents that autonomously hacked into Hugging Face

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. OpenShell lets developers "formally verify an agent has enough authority to do its job and no more," while Sentry can "quarantine a suspicious agent in milliseconds"

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. More than 100 organizations are using the platform at launch, including Microsoft, Perplexity, Accenture, and JPMorgan Chase

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AI Bubble Concerns and Profitability Questions

The buyback comes as questions mount about AI profitability across the ecosystem. Nvidia remains the only company making substantial monetary gains from the AI boom, while AI startups and labs buying its compute struggle to prove they can generate standalone revenue

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. Even AI hyperscalers face hundreds of billions in new debt, with around $300 billion of direct bond issuance expected in 2026 alone

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Robin Wigglesworth, Financial Times reporter and author of the upcoming book "A Fabulous Debt," noted that "AI startups are burning through investor cash and handing it straight to Nvidia to buy chips, even though the startups themselves aren't making a profit"

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. This dynamic echoes the vendor-financing schemes of the late-1990s dot-com boom, when equipment providers funded service providers to buy their gear

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Source: NYT

Source: NYT

Nvidia holds $99 billion in customer shares, including Intel, SpaceX, and OpenAI, up from $7 billion a year earlier

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. Critics like Michael Burry suggest the company is overreaching by financing its own buyers

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. Tech critic Ed Zitron characterized the buyback as "an attempt to calm very nervous investors around AI," noting that Nvidia greenlighting a buyback doesn't legally commit the company to purchasing those shares

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What to Watch: AI Safety Debate and Revenue Growth

The AI safety debate has divided the industry. While heads of Anthropic and OpenAI champion a coordinated slowdown of AI development to let safety efforts catch up, Jensen Huang maintains it should be up to individual companies to ensure their models are safe for release

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. Huang characterized AI safety, including the danger of rogue agents, as an engineering problem that software developers can address

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Investors expect AI agents such as Meta's Muse to lift demand for chips, driving Nvidia's recovery

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. Last month, Nvidia forecast about 70% revenue growth for fiscal 2028, reassuring investors questioning how long the AI spending surge can last

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. In August, the company projected current quarter revenue would increase 90% from a year ago to $108 billion

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. Watch whether accelerated computing demand from AI data centers continues justifying Nvidia's market valuation, and whether the Open Agent Safety Platform becomes a significant revenue driver or primarily serves as a strategic positioning move to sustain the AI boom.

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