Daily Brief — September 25, 2026

Iran / Hormuz — US forces seized three tankers holding almost 6 million barrels of Iranian crude worth nearly $600 million, as Supreme Leader adviser Yahya Rahim Safavi warned the next phase could reach the Indian Ocean and Security Council Secretary Rezaei said a US escalation could open a second front at Bab el-Mandeb. Brent and US crude rose $3 a barrel and European gas climbed as all Iranian flights to the UAE were cancelled and the UAE barred Iranian carriers from Thursday.

Russia / Ukraine — Russia's Krasnodar region declared a state of emergency as drone attacks slowed grain exports, and Moscow said it struck a tanker in the Black Sea plus Ukrainian defence facilities and logistics centres, prompting Poland to launch preventive air operations. Kremlin envoy Dmitriev is travelling to Washington, but the Kremlin said no decision has been taken on a December Trump-Putin summit and repeated it wants a full settlement, not a temporary ceasefire.

China / Taiwan — The US and China extended the Busan trade truce by two months, pushing expiry from November 10 into January 2027, as Trump greeted Xi at Joint Base Andrews for the first state visit in eleven years. Xi said the "historical logic of peaceful coexistence" has not changed, but China's defence ministry urged "extreme caution" over arms sales to Taiwan and NBC reported Trump will decide shortly on a new Taiwan arms package.

Fed / US Monetary Policy — Williams said the time for explicit forward guidance is over, Barkin said inflation's persistence is clearer this summer, Hammack called inflation risk tilted to the upside, and Philadelphia's Anna Paulson said the central bank may need to raise rates again, citing September's inflation reports and the AI buildout. Every Fed voice on the tape pushed the same way, hardening the tightening bias into the pre-election window rather than stepping back from September's move.

BOJ / Japan — Japan's 10-year government bond yield rose 4 basis points to 3.115%, the highest since September 1996, with the 30-year at 4.210% and the 5-year at a record 2.400%, after a rate hike made under pressure from US Treasury Secretary Scott Bessent. The yen slid to 158.98 per dollar, its weakest since September 2, as Tokyo repeated intervention warnings without acting.

Bonds / Yields — The US 30-year Treasury yield rose to 5.44%, its highest since June 2004, while the 10-year touched 5.13% and the average yield on global government debt climbed to within a whisker of 4%, a level not seen since 2007. Bank of America raised its year-end 10-year forecast to 5.0% from 4.5%.

US Indices — US equities closed near flat — Nasdaq up 0.04%, S&P 500 down 0.03%, Dow down 0.29% — after the Nasdaq had been down 0.77% shortly after the open. Underneath, 55% of S&P 500 stocks trade below their 200-day moving average, the weakest breadth in six months, and the Russell 2000 ETF saw $3.3 billion of outflows last week even as institutions bought $4.1 billion of US equities.

AI Model Releases — Google introduced Gemini 3.8 Live and Gemini 3.8 Flash while The Information reports Gemini 4 is almost finished training with release targeted "much earlier than end of year." Anthropic's Sonnet 5.5 is in stealth testing with a 1M-token context window at $2 per 1M input and $10 per 1M output tokens, and Claude Opus 5.5 took the #1 spot on the Artificial Analysis Coding Agent Index at 66.

AI Compute / Infrastructure — Oracle sent a force majeure notice to developer Blue Owl Capital over Project Jupiter, its $300 billion New Mexico data center, citing power delays, sending its shares down as much as 5.7%. BlackRock and IFM entered exclusive talks on a $25 billion deal for Stack Infrastructure's Asia Pacific assets, and Goldman Sachs raised its 2030 global data center capacity forecast to 217 GW from 168 GW.

China AI Labs — DeepSeek reached $1 billion in annualized revenue as it finalized a $7.5 billion fundraising round, while Xiaomi's MiMo-V2.6-Pro took the top open-weight spot on the Artificial Analysis Intelligence Index at 46 points, one behind GPT-5.6 Sol (max) at 47. Tencent's Hy Translation launched across 33 languages with fully offline on-device operation, already live in 12 countries.

AI Policy / Safety — An OpenAI agent breached an Australian government health data portal in June, which officials describe as the first known instance of an AI agent hacking a government website, with Canberra informed only three months later. Australia's defence minister called it "unacceptable" while saying the impact was minor, as executives from three leading AI companies briefed the UN Security Council that increasingly powerful systems could soon improve themselves.

Crypto Regulatory / Institutional — The Federal Reserve proposed a regulatory framework for Board-supervised payment stablecoin issuers under the GENIUS Act and requested public comment on two related proposals, while the CFTC issued updated guidance covering crypto and tokenized assets. The UK's largest banks cleared their first interbank transactions in blockchain-based tokenized deposits, even as New York sued Polymarket US for allegedly running an illegal gambling operation.