Multiple Polymarket users reported unauthorized transfers out of their accounts, with some claiming losses of hundreds of thousands of dollars, prompting the platform to enter cancel-only mode, pause relayer actions and temporarily halt trading. Polymarket said one of its third-party providers had been compromised, that the issue affecting Polymarket.com had been identified and fixed, and that the matter has been referred to law enforcement.

The incident triggered a platform-wide trading restriction on one of the largest prediction-market venues, and Polymarket said anyone affected "will be made whole." The root cause remains unconfirmed, with users suspecting a frontend compromise.

Cancel-only mode allowed traders to cancel existing orders but not place new ones, and relayer actions — the service that submits users' signed transactions to the blockchain — were paused; the Predictions Trading API was listed as experiencing a major outage, with Polymarket reporting all systems operational as of 7:05 pm UTC. Security firm Hudson Rock said a DebugBear-hosted script containing wallet-draining code hard-codes the same fallback recipient address as a wallet flagged as the suspected attacker's, which Arkham data showed holding about $2.65 million in POL after multiple USDC.e-to-POL swaps through Relay.

Intercontinental Exchange (ICE), the operator of the New York Stock Exchange, and trade[XYZ] announced on Thursday a plan to use Hyperliquid as the infrastructure layer for perpetual futures markets serving US traders across crypto, equities, commodities, foreign exchange and other real-world assets, subject to regulatory approvals. Under the structure, Hyperliquid supplies the underlying technology via HIP-3, trade[XYZ] designs and implements the markets, and ICE operates the regulated market and clearing structure.

The arrangement would give US retail traders a regulated route to Hyperliquid-based perpetual futures, while handing ICE a new entry point into retail trading; ICE said the vehicle would run separately from its institutional futures business. OKX CEO Star said the project is being advanced jointly by ICE, trade[XYZ] and OKX, with retail distribution to flow through an ICE-OKX joint venture.

ICE said it has signed a definitive agreement with Trade.xyz and will be the exclusive US operator, with a dedicated clearing structure intended to shield its existing customers — more than 99% of its market participation is institutional — from retail counterparty risk. Existing trade[XYZ] HIP-3 markets will remain unchanged, and HIP-3 deployers remain independent operators responsible for their own deployments.

Bitcoin developers moved quickly to patch three security vulnerabilities in the protocol's code after an AI system identified them, CryptoSlate reported. The flaws were uncovered with AI assistance and remediated by developers working on the codebase.

The episode is being framed as a demonstration of both the value and the risks of AI-driven vulnerability research aimed at critical cryptocurrency infrastructure.

Singapore police said on October 28 that some Ledger hardware wallets bought from retail stores in the country contained malicious components able to capture users' recovery phrases or private keys. At least two cases have been reported since September 10, 2026, with combined losses of about S$3.5 million (roughly US$2.7 million).

The affected devices are sold through ordinary retail channels, so users who believe they hold keys offline may still have had their recovery phrases exposed. Police said the unauthorized parties used the captured data to access wallets and move assets without the owners' knowledge or consent.

Singapore police said they have contacted Ledger, which is reviewing the affected cases, and that investigations are ongoing. The announcement did not specify how many devices were affected or which retailers were involved.

On the Alphabet Q3 2026 earnings call, CEO Sundar Pichai said the Gemini app has reached 1 billion monthly active users, making it Google's fastest-growing product, and that first-party model APIs now process nearly 32 billion tokens per minute, up 40% quarter-over-quarter and more than 4x year-over-year. The company also formally announced its new frontier model Gemini 4 Carbon alongside progress on the Genie 4 world model, while guiding 2027 capex to "increase significantly."

Quarterly revenue of $127.6 billion (+25%) and profit both came in slightly below Wall Street expectations, and the stock fell about 9% to 10% in after-hours trading as investors weighed record cloud growth against heavy spending and negative free cash flow.

Google Cloud revenue rose 103% to $30.7 billion on enterprise demand for AI infrastructure, AI solutions and TPU systems, while Google Services grew 11% to $96.3 billion. The company kept its 2026 capex guidance at $195 billion to $205 billion without specifying a 2027 figure, and free cash flow was negative for a second consecutive quarter, which the CFO partly attributed to higher TPU inventory and a $5.2 billion EU fine payment.

DoorDash announced on its corporate newsroom that it will acquire Instacart, bringing two major U.S. delivery platforms under one company. The announcement frames the combination around helping local stores compete.

The deal would concentrate two large local-delivery brands in a single company, prompting immediate questions in community discussion about antitrust review and how grocery and local commerce competition would be affected.

DoorDash's announcement describes the acquisition as intended to help local stores win. The combination would join a restaurant-delivery-led platform with a grocery-focused one.

Mistral Large 4, codenamed "Le Chonk", has been published on Hugging Face, and Mistral says the model's weights are now open. According to Mistral's announcement and coverage of it, ML4 is a roughly 1.05-trillion-parameter multimodal mixture-of-experts model that activates about 52 billion parameters and was trained in Europe.

Mistral describes it as the best open-weight model for coding, which would put a trillion-scale multimodal model directly in developers' hands for self-hosted and fine-tuned deployments. The release also extends Mistral's open-model strategy from its earlier flagship generation to a much larger parameter scale.

The model is positioned as open-weight rather than merely API-accessible, with Mistral's announcement pages dated October 6, 2026. Detailed benchmark results were not included in the material reviewed.

HTX is exiting the UK market and requiring affected customers to request a limited 48-hour withdrawal window instead of retaining normal ongoing access to the exchange. According to CoinTurk reporting, the exit follows a settlement with the UK Financial Conduct Authority over unlawful financial promotions, which the outlet describes as the regulator's first legal action against a crypto firm on those grounds.

UK-based customers lose ongoing access to the platform and must act inside a compressed, request-based window to move their assets. The exit also shows a top-20 exchange withdrawing from a major jurisdiction under regulatory pressure rather than continuing to serve it.

Withdrawal access is request-based rather than automatic, and the window is 48 hours. HTX, formerly known as Huobi, is a Seychelles-based exchange.

Strategy reported $19.5 billion in third-quarter net income and won shareholder approval to move its preferred stocks to daily dividend payments. Per Cointelegraph and Bankless, the change covers four preferred securities — STRC, STRF, STRK and STRD — with daily payouts on STRC starting in November and the other three following in January 2027.

Strategy is the largest corporate holder of Bitcoin, so its capital-structure decisions are closely watched by investors using its securities as a proxy for BTC exposure. Shifting preferred dividends from periodic to daily payments changes the cash-flow profile of those instruments and the company's ongoing payment obligations to preferred holders.

The approval was confirmed on Wednesday, Oct. 28, covering a change the company first floated in September. Daily dividends begin on STRC in November, with STRF, STRK and STRD converted in January 2027.

On-chain investigator ZachXBT alleged that suspected Axis Robotics insiders received more than 76 million AXIS tokens (valued at over $12 million) from the team multisig wallet before selling them through decentralized exchanges and depositing funds into Bitget. According to ZachXBT, one insider offloaded roughly 42 million tokens (~5.04 million USDC) directly from the team multisig, triggering a 40% price plunge about one week after AXIS listed on Coinbase, Upbit and Binance.

Axis Robotics pushed back, saying 83.5% of team and investor tokens remain locked in a Binance-co-managed vesting contract with no unlocks for 12 months, and that the sold tokens came from the initial circulating ecosystem allocation handed to an OTC counterparty that it says breached lock-up terms. The company said it has paused ties with that counterparty, initiated legal action and pledged to distribute future ecosystem tokens solely through on-chain vesting.

ZachXBT questioned why it took the team two full days to notice roughly 25% of the TGE float being dumped, and why the team neither stopped the sell-off nor issued a public statement before his post. The two accounts differ on the source of the tokens: ZachXBT attributes the sales to the team multisig, while Axis attributes them to an OTC counterparty's breach.

Franklin Templeton announced the Franklin U.S. Equity Bitcoin DRIP Index ETF (FBEQ) and the Franklin U.S. Innovation Bitcoin DRIP Index ETF (FIBT), both to be listed on Nasdaq. Each starts with a 95% equity / 5% bitcoin allocation and systematically reinvests dividends from the underlying stocks into bitcoin, with the index reviewing the bitcoin exposure quarterly to keep it as a secondary allocation.

The products give equity investors a dividend-funded route to bitcoin exposure without buying crypto directly, extending a large asset manager's lineup of crypto-related ETFs.

FBEQ covers roughly 500 of the largest U.S. companies by market capitalization with a 0.09% fee, while FIBT covers 100 large non-financial U.S. companies listed on Nasdaq with a 0.19% fee. The quarterly index review is structured by rule to keep bitcoin a minority weight rather than a variable, discretionary position.