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More →Ken Griffin Says AI Is 'Almost Certainly' in a Bubble—And Compares GPUs to Airline Seats
Ken Griffin, founder of the Wall Street giant Citadel, <a href="https://www.marketwatch.com/story/ai-stocks-are-probably-in-a-bubble-but-might-be-worth-holding-onto-says-citadels-ken-griffin-87f535ce" target="_blank" class="sc-adb616fe-0 dJryYS" rel="nofollow">said</a> Tuesday that investors are “almost certainly” in an AI bubble—though he isn’t telling them to dump their AI stocks. “What’s left in the wake of these bubbles, if we want to use that word, is often game changing for the world. And the companies that are on the other side of that bubble are the market leaders for decades to come,” Griffin said at Citadel’s Future of Global Markets Conference in New York on Oct. 20 This reaches beyond tech investors, since the AI buildout has <a href="https://decrypt.co/359175/nvidia-earnings-steady-markets-ai-spending-debate-intensifies" target="_blank" class="sc-adb616fe-0 dJryYS" rel="nofollow">underpinned equity markets</a> over the past year, so many index funds and retirement accounts hold a slice of it. A bubble is what happens when prices climb far faster than the businesses behind them can justify, until reality catches up. Citadel is a hedge fund, a private firm that invests money for wealthy clients and institutions. But the fact that it seems like a bubble isn’t <i>that</i> big a deal if you look at the big picture, according to Griffin. “Any radical transformation of our economy is generally intertwined with a bubble,” he said, recalling the internet boom and adding that he wishes he had kept his Amazon stock. The companies that emerge on the other side of a bubble tend to lead markets for decades, he argued, though he stopped short of predicting a collapse. His own firm is a case study: Griffin said AI agents, software that carries out multistep tasks on its own, cut some high-level Citadel research from weeks to a couple of hours. Griffin compared GPUs, the graphics chips that many companies use to train and run AI models, to airline seats. Both have a very low marginal cost to run, meaning the extra expense of serving one more customer is tiny, so prices can collapse once supply outstrips demand. He pointed to the telecom boom around 2000, when companies laid more fiber-optic cable than demand required and communication prices fell. He also doubted that chips five or six years old, which still earn rental rates he called extraordinary, will keep doing so for another five or six years. Buyers are getting pickier, Griffin said, sorting which jobs justify premium models from OpenAI and Anthropic and which can run on cheaper open-source alternatives, meaning models anyone can download and run on their own computers. Corporate America has been uneven at extracting value from AI, he added, with companies studying their bills from the labs and asking where the productivity is. Gartner forecasts worldwide<a href="https://www.gartner.com/en/newsroom/press-releases/2025-09-17-gartner-says-worldwide-ai-spending-will-total-1-point-5-trilli
Bybit receives regulatory approval to operate in Dubai.
Crypto exchange Bybit has officially received regulatory approval to operate in Dubai, according to WatcherGuru, as reported by Bijie Network.
Hackers attempted to exploit a critical PHP vulnerability four days before it was publicly disclosed.
CoinWorld news, OneMillion_AI reports, Amazon threat intelligence stated that its honeypot system madpot observed exploitation attempts targeting the php2shell vulnerability on October 17, approximately four days earlier than the public disclosure of related details. The vulnerabilities are numbered CVE-2026-109618 and CVE-2026-109619, which can lead to unauthenticated remote code execution and affect PHP 7.x and 8.x. The attempts originated from IPs associated with commercial anonymity networks, and Amazon said it is not yet clear how the attackers obtained exploitation information during the embargo period, nor has it confirmed that real systems have been compromised. Amazon stated that multiple proofs of concept appeared within hours after the patch and public information were released, and multiple attackers launched probes using different anonymous infrastructure. php2shell is now widely exploited in the wild. Its Chief Information Security Officer CJ Moses said that AI-assisted analysis is reducing the cost of generating usable exploits from patch diffs or advisories, and the time window from disclosure to a working exploit is shrinking.
The speaker of Libya's eastern parliament said the parliament accepts in principle the resignation of central bank governor Naji Issa and appointed central bank board member Fouzi Musbah Abuhozam to succeed him in the role.
Libya's eastern parliament speaker said the parliament has accepted in principle the resignation of central bank governor Naji Issa and appointed central bank board member Fouzi Musbah Abu Khuzam to succeed him in the role.
US index options volume was 6,826,606 contracts.
CoinWorld US stock market data: US index options volume was 6,826,606 contracts, of which 3,394,817 were calls and 3,431,789 were puts.
The Saudi-led coalition said it intercepted 4 drones in Riyadh and Medina.
CoinWorld news: The Saudi-led coalition said it intercepted four drones in Riyadh and Medina.
Webull plans to launch Bitcoin perpetual contracts in November.
Webull has announced plans to offer perpetual contracts for Bitcoin and other cryptocurrencies to eligible U.S. customers in November. The contracts will be provided by the Kalshi exchange, and customers will trade them using their existing Webull futures accounts. Webull has not yet announced the exact launch date, the full list of assets, or the initial margin arrangements for each contract. The contracts have no expiration date, but funding, margin, and an independent clearinghouse will still determine the cost of holding a position and when it is liquidated. Webull CEO Anthony Denier said global demand for perpetual contracts is enormous, with annual trading volume exceeding $90 trillion in 2025.
Traders expect Chile's October inflation to be 0.5% month-on-month.
Cointime news: traders expect Chile's October month-on-month inflation to be 0.5%.
Siemens and NVIDIA sign a partnership agreement on an industrial AI operating system.
CoinWorld news: Market sources say Siemens has signed a cooperation agreement with Nvidia (NVDA.O) for an industrial AI operating system.
Siemens and NVIDIA sign a partnership agreement on an industrial AI operating system.
CoinWorld news: Market sources say Siemens has signed a partnership agreement with NVIDIA (NVDA) for an industrial AI operating system.