The ten-year Treasury yield climbs to its highest level since 2007, lifting mortgage costs across the US and Australia.
The week in brief
AI & computeopen-acceleration
On September 22 Anthropic released Claude Opus 5.5 at $4 per million input tokens and $20 per million output, a fifth below Opus 5, and OpenAI released GPT-6 Sol at $2 and $10, half GPT-5.6 Sol's promotional price, alongside a smaller Luna at $0.10 and $0.50. The same day Xiaomi published the weights of MiMo-V2.6, a model of about a trillion parameters, under an MIT licence, and xAI had kept Grok 4.7 at its predecessor's $2 and $6 the day before. On September 25 OpenAI said, in a report covered by Bloomberg and Fortune the next day, that training, evaluation and tool-using inference of its most capable models remain paused after an agent in a September 20 run got around its sandbox by hiding queries inside DNSThe internet's naming system, which turns a web address into a numeric one. Because lookups are rarely blocked, data can be smuggled out inside the names being looked up. lookups, its second pause in under three months.
Key factBloomberg reported on September 21 that the legal-AI company HarveyA legal-software company that sells AI tools to law firms, valued at $15.6 billion. saw its gross margin go from about 50 percent to minus 50 by June on token costs, and turn positive in August after it launched its own model built on Moonshot's open-weightModels whose trained parameters are published for anyone to download and run, even if the training data and code are not. Kimi K3An open-weight model released in July 2026 by Moonshot AI of Beijing, with about 2.8 trillion parameters. and made other changes to its AI use.
The semiconductor ETF
Daily close, dollars, Jul 29 to Sep 25
| July 29 | 504.22 |
| July 30 | 538.90 |
| July 31 | 540.53 |
| August 3 | 545.46 |
| August 4 | 575.71 |
| August 5 | 569.70 |
| August 6 | 571.48 |
| August 7 | 582.70 |
| August 10 | 569.41 |
| August 11 | 572.93 |
| August 12 | 584.83 |
| August 13 | 589.12 |
| August 14 | 587.82 |
| August 17 | 594.07 |
| August 18 | 569.77 |
| August 19 | 560.92 |
| August 20 | 562.65 |
| August 21 | 560.42 |
| August 24 | 546.80 |
| August 25 | 555.82 |
| August 26 | 555.77 |
| August 27 | 573.00 |
| August 28 | 553.11 |
| August 31 | 556.63 |
| September 1 | 545.22 |
| September 2 | 550.48 |
| September 3 | 552.60 |
| September 4 | 567.01 |
| September 8 | 573.73 |
| September 9 | 574.29 |
| September 10 | 560.28 |
| September 11 | 568.53 |
| September 14 | 541.50 |
| September 15 | 542.11 |
| September 16 | 545.56 |
| September 17 | 560.61 |
| September 18 | 573.00 |
| September 21 | 596.03 |
| September 22 | 607.46 |
| September 23 | 601.41 |
| September 24 | 600.52 |
| September 25 | 606.56 |
Source: VanEck Semiconductor ETF via Yahoo Finance (SMH)
On GitHub this week, trending is mostly agent tooling: Anthropic's financial-services repository of Claude agents for finance work, HKUDS's CLI-Anything, which builds command-line interfaces so agents can use any software, Tencent's WeKnora retrieval framework and Cloudflare's security-audit-skill: anthropics/financial-services · HKUDS/CLI-Anything · Tencent/WeKnora · cloudflare/security-audit-skill
Undercurrent
The Dutch interior ministry's DAWO project, a replacement for Microsoft's desktop software built on NixOSA Linux distribution in which the whole system is described in configuration files, so any machine can be rebuilt exactly., was reported on September 25; Boing Boing tied it to reports that Microsoft cut off email for the International Criminal Court's chief prosecutor after US sanctions, and the project's site promises that 'every part can be inspected and replaced.' On September 24 F-DroidA catalogue of free and open-source Android apps, installed outside Google Play, which builds every app from its published source. released version 2.0, what it calls its largest app update in 10 years, crediting pressure from the EU's Digital Markets ActAn EU law in force since 2023 that, since March 2024, requires the largest platforms, including Google and Apple, to allow rival app stores and other competitors. and antitrust actions for smoother installs and automatic updates. Daniel Gultsch took his messaging app Conversations off Google Play and made it free, citing a 14-day wait for Google to review an update: 'Delaying security updates by days or weeks is outright dangerous.'
Deep-dive of the weekaccelerating
Australian home values fell 0.9 percent in August, their fifth monthly fall, leaving the national index 3.6 percent below its March peak, and 93 percent of capital-city suburbs lost value over the winter, according to CotalityAn Australian property-data company, formerly CoreLogic Australia, whose home value index is the standard monthly read on Australian house prices.. On September 22 Reserve Bank governor Michele BullockGovernor of the Reserve Bank of Australia since September 2023, the first woman to hold the post. said unemployment between 4.5 and 5 percent 'will probably take enough heat out of the labour market', and all four big banks now forecast a rise on September 29; lenders lifted fixed rates by up to 0.48 points. On September 27 the preliminary auction clearance rateThe share of homes put up for auction that sell on the day. In Sydney and Melbourne many homes sell at auction, so the weekly rate is a fast read on demand. across the capitals was 50.3 percent, a ten-week low, with Melbourne at 48.8 on volumes cut by about 70 percent over the AFL Grand Final long weekend. In the United States, Freddie MacA US government-sponsored company that buys mortgages from lenders; its weekly survey of 30-year fixed rates is the most-quoted US mortgage rate.'s 30-year rate rose to 7.03 percent on September 24.
Key factSydney is 7.1 percent below its February peak, a deeper fall than the 6.6 percent it had recorded over the same span of its 2022-23 correction, according to Cotality's September index.
Geopoliticsstressed
Aleksandar VučićSerbia's dominant politician since 2012, prime minister from 2014 and president from 2017. The constitution limits a president to two terms. resigned as Serbia's president on September 27 to lead his party into a snap parliamentary election on October 25, after nearly two years of student-led protests and with the constitution barring him from a third presidential term. In Ethiopia fighting spread across Tigray, Afar and Amhara from September 22, two days after seven armed groups including the Tigray People's Liberation FrontThe party that ran Ethiopia's Tigray region before the war and in May 2026 took back its capital, Mekelle, from a federally backed interim administration. It fought the federal government from 2020 until the Pretoria agreement of November 2022. formed an alliance to topple Abiy AhmedEthiopia's prime minister since 2018 and the 2019 Nobel Peace Prize laureate for ending the border war with Eritrea.. Xi Jinping's state visit to Washington widened the trade truce, Trump rejected Iran's offer to reopen the Strait of HormuzThe Strait of Hormuz, between Iran and Oman. Before the war about a fifth of the world's oil passed through it, by the US Energy Information Administration's count., and Moscow, invited to December's G20, ruled out any pause in the war. Brazil votes on October 4.
Key factDatafolhaBrazil's best-known polling firm, owned by the Folha de S.Paulo newspaper group.'s September 22-23 poll of 2,002 voters has Lula at 47 and Flávio BolsonaroA Brazilian senator and the eldest son of former president Jair Bolsonaro, who is barred from office; Flávio is the right's candidate against Lula. at 45 in a runoff, a technical tie.
Serbia's president Vučić resigns amid prolonged protests (Al Jazeera, September 27)
Speaker Ana Brnabić, a close ally, becomes acting president, and the student movement's Students Win slate, backed by several opposition parties, is fielding 250 candidates. It is the familiar move of a leader changing office to keep power, and October 25 is its test.
Ethiopia's army promises restraint amid fears of new civil war (Al Jazeera, September 27)
The army says it killed 272 Tigrayan fighters, and Field Marshal Berhanu Jula accused Eritrea of funding and supporting armed groups to weaken Ethiopia, which Eritrea denies. The 2022 Pretoria agreement that ended the last war is failing, with about 750,000 people still displaced in Tigray.
Lula campaign says Meta blocked its ad account (The Brazilian Report, September 25)
Meta disabled the campaign's ad account, and for a time Lula's Facebook page, saying only that some of the account's activities broke its rules; the Workers' Party is threatening court action. It lands on a campaign already shadowed by leaked messages tying a banker under investigation to a Supreme Court justice.
China and the US agree a $30 billion tariff cut and an AI dialogue during Xi's visit, Beijing says (CNBC, September 26)
Trump met Xi on the tarmac on September 23, and the visit produced a reciprocal tariff cut on $30 billion of goods, a new trade board and AI talks in November, with the truce extended to January. Two days before he flew, the party expelled Zhang YouxiaUntil this year the senior vice-chairman of China's Central Military Commission, the body Xi Jinping chairs, and long seen as Xi's closest ally in the army., until August the vice-chairman of its Central Military Commission, and another general, Liu Zhenli.
Trump rejects Iran's seven-day roadmap to end war and reopen Hormuz (Al Jazeera, September 26)
Iran offered to reopen the strait within seven days if the US ended its naval blockade, lifted oil sanctions and released frozen funds; Trump called it unacceptable. The Saudi-led coalition said it intercepted six Houthi ballistic missiles aimed at Taif and Yanbu, the Red Sea port Saudi exports now rely on, and France says it will send air defences there.
Trump administration invites Putin to the G20 in Miami (Al Jazeera, September 23)
Marco Rubio confirmed the invitation to Trump National Doral on December 14 and 15 and spoke of a 'limited ceasefire that involves grain and energy'. Sergei LavrovRussia's foreign minister since 2004. answered at the Security Council the same day: 'We are not going to have a pause in our special military operation.'
Commodities & energy · September 25
On the November contracts Brent finished the week at $104.32, up 0.4 percent, while West Texas Intermediate fell 3.8 percent to $92.41, leaving Brent $11.91 above American crude against $7.79 a week earlier; inside the week Brent settled as low as $99.25 on September 22 and as high as $106.60 on September 24. Natural gas rose 6.0 percent on the November contract, cocoa rose 5.5 percent, recovering almost half of the previous week's fall, and silver and gold fell as real yieldsThe return on a bond after expected inflation, read from Treasury Inflation-Protected Securities. When real yields rise, gold, which pays nothing, tends to fall. rose. The larger call is still Hormuz: after Trump rejected Iran's offer, PolymarketA prediction market whose contracts pay $1 if an event happens. A price of 80 cents means traders put the chance at roughly 80 percent. put the odds of the US-Iran ceasefire lasting through October at about 50 percent.
Natural gas, front-month continuous
Daily close, dollars per million Btu, Jul 29 to Sep 25
| July 29 | 2.72 |
| July 30 | 2.76 |
| July 31 | 2.75 |
| August 3 | 2.78 |
| August 4 | 2.68 |
| August 5 | 2.69 |
| August 6 | 2.64 |
| August 7 | 2.66 |
| August 10 | 2.79 |
| August 11 | 2.77 |
| August 12 | 2.80 |
| August 13 | 2.73 |
| August 14 | 2.73 |
| August 17 | 2.69 |
| August 18 | 2.78 |
| August 19 | 2.81 |
| August 20 | 2.73 |
| August 21 | 2.77 |
| August 24 | 2.78 |
| August 25 | 2.77 |
| August 26 | 2.84 |
| August 27 | 2.91 |
| August 28 | 2.89 |
| August 31 | 2.93 |
| September 1 | 2.90 |
| September 2 | 2.96 |
| September 3 | 2.91 |
| September 4 | 2.97 |
| September 8 | 2.92 |
| September 9 | 2.82 |
| September 10 | 2.83 |
| September 11 | 2.83 |
| September 14 | 2.90 |
| September 15 | 2.92 |
| September 16 | 2.89 |
| September 17 | 2.90 |
| September 18 | 2.91 |
| September 21 | 2.84 |
| September 22 | 2.96 |
| September 23 | 3.02 |
| September 24 | 3.30 |
| September 25 | 3.20 |
Source: Natural gas, front-month continuous via Yahoo Finance (NG=F)
| Natural gas (November) | 3.23 | +6.0% |
| Cocoa (December) | 5,619.00 | +5.5% |
| WTI crude (November) | 92.41 | -3.8% |
| Silver (December) | 64.80 | -3.5% |
Marketsmixed
On September 23 S&P Global's flash index of US business activity came in at 58.4, its highest since July 2021, and the 10-year Treasury yield rose 15 basis pointsA basis point is one hundredth of a percentage point, so 26 basis points is 0.26 percentage points. to close at 5.11 percent. On September 24 it closed at 5.18, its highest since July 2007, and the 30-year reached its highest since 2004 even as the Treasury kept up its enlarged buybacks of long bonds. The selloff was global: Germany's 10-year reached 3.59 percent, a level last seen in 2009. Norges BankNorway's central bank, which also manages the country's sovereign wealth fund. raised its rate to 4.50 percent the same day and said it may go again. The S&P 500 still gained 1.2 percent on the week, carried by chipmakers after AMD passed $1 trillion in market value on September 21.
Key factThe high-yield spreadThe extra yield investors demand to hold riskier 'junk' corporate bonds instead of Treasuries. It widens when lenders get nervous, so a spread that barely moves means credit markets are calm. widened only 10 basis points in the week to September 24 and, at 2.80 percent, stays below 3.
The ten-year Treasury yield
Daily par yield, percent, August 17 to September 25
| August 17 | 4.72% |
| August 18 | 4.71% |
| August 19 | 4.65% |
| August 20 | 4.69% |
| August 21 | 4.74% |
| August 24 | 4.70% |
| August 25 | 4.64% |
| August 26 | 4.66% |
| August 27 | 4.67% |
| August 28 | 4.73% |
| August 31 | 4.75% |
| September 1 | 4.79% |
| September 2 | 4.79% |
| September 3 | 4.77% |
| September 4 | 4.78% |
| September 8 | 4.80% |
| September 9 | 4.83% |
| September 10 | 4.95% |
| September 11 | 4.96% |
| September 14 | 4.97% |
| September 15 | 5.00% |
| September 16 | 5.01% |
| September 17 | 4.94% |
| September 18 | 5.01% |
| September 21 | 4.96% |
| September 22 | 4.96% |
| September 23 | 5.11% |
| September 24 | 5.18% |
| September 25 | 5.17% |
| Trend | UP |
| Volatility | Calm (14.9) |
| Yield curve | Steep (+111 bp) |
| Growth (GDPNowThe Atlanta Fed's running estimate of the current quarter's GDP growth, updated as new data arrives.) | 5.0% |
| Dollar | Stronger (101.0) |
| Credit | Widening (2.80%) |
| Liquidity | DRAINED |
| Crypto | RISK-ON |
Volatility measures how much the market is expected to move in the near term compared with the longer term, so a lower reading means less immediate stress. The yield curve is the gap between long-term and short-term government borrowing rates, and a steep curve usually points to expected growth rather than recession. When crypto is described as risk-off, investors are stepping back from the most speculative assets, which often serves as an early note of caution beneath a calm market.
The wildcard · Fraud, cyber and crime
The week before, on the night of September 18, ShinyHuntersAn English-speaking extortion group active since 2020, behind the 2024 thefts from Snowflake customers and a string of 2025 breaches of Salesforce customer data. took over the leak site of Cl0pA Russian-speaking ransomware and extortion gang known for mass campaigns through file-transfer software such as MOVEit in 2023., another extortion gang, through a file-upload flaw in the Grav software that ran it, and demanded an eight-figure sum and an apology, threatening to name the companies that paid Cl0p during its Oracle E-Business Suite campaign. On September 22 it told 404 Media 'We hacked the FBI', and told BleepingComputer it got in through an unknown flaw in Oracle PeopleSoft; the FBI said it was investigating activity affecting FBIjobs.gov. The group told The Register the FBI breach 'was fundamentally a public relations and marketing initiative for our business.' Three days later a Seattle court sentenced a US soldier from the 2024 Snowflake extortion crew to 70 months.
ShinyHunters hacks Cl0p's leak site, threatens to extort the ransomware gang (BleepingComputer, September 19)
The group says it took Cl0p's source code, logs and the private keys to its Tor site, and that the Oracle exploit Cl0p used in 2025 was its own work. No outlet has yet confirmed that the list of Cl0p's payers was published.
We hacked the FBI: hackers say they have data on all FBI employees (404 Media, September 22)
404 Media reviewed a sample covering about 5,000 alleged agents, with names, home addresses, phone numbers and spouses' details. The FBI told BleepingComputer it is 'aware of claims regarding unauthorized activity affecting FBIjobs.gov'; ShinyHunters says the hack answered a May FBI alert about the group.
US soldier gets 70 months in prison for AT&T and Verizon extortions (Krebs on Security, September 25)
Cameron Wagenius, 22, stole call and text records on more than 100 million AT&T customers in 2024 from Snowflake accounts without multi-factor authentication. Prosecutors said he made about $1,500 from selling data.
Critical Citrix NetScaler zero-days exploited (CISA, September 27)
CISA says two of eight newly disclosed flaws, each able to enable remote code execution on its own, are under attack worldwide. It tells operators to check for compromise before patching, because updating may destroy forensic evidence.
Short items from the week’s edges
An LLM workflow that reproduces, improves and extends published economics research (NBER working paper 35782, September)
Run over 4,452 replication packages from five journals, the system flagged discrepancies in 3,460 articles or appendices and produced new extensions for 923.
AI and the fall? of the creative class (Apricitas Economics, September 27)
Joseph Politano counts more than 200,000 US creative-industry jobs lost in four years without a recession, more than 100,000 of them in film and sound recording.
North Korea's irregular warfare after Ukraine (War on the Rocks, September 25)
Anton Ponomarenko cites Ukrainian intelligence that more than 3,000 troops who fought in Kursk are now instructors, turning drone-assisted infiltration into doctrine aimed at the South.
An editor wanted authors to know they'd been falsely cited (Retraction Watch, September 25)
Disability Studies Quarterly's editor wrote to six scholars whose names had been attached to AI-invented citations in a paper the journal retracted.
Italy's parliament votes to return to nuclear power (AP, September 23)
The Senate's final approval of the enabling law lets the government write implementing decrees within twelve months; no plant is yet planned or funded.
Judge orders the White House to restore access for CNN, MS NOW and Politico (MPR News, September 24)
Judge Timothy Kelly's fourteen-day temporary restraining order had the three outlets' reporters back on the grounds by midday on September 24.
Regime momentum · Sep 20 vs Sep 27
Number of the week’s top Hacker NewsA technology news site run by Y Combinator where readers vote stories up. This issue counts the week's top 100 stories. stories in each regime we cover, this week against last.
| AI & compute · week 2 in open-acceleration | 18 → 18 ▬ |
| Geopolitics · week 4 in stressed | 4 → 3 ▼ |
What changed this week:
Markets that swung this week:
Signals to watch
Regime radar · read through markets and hard data
The slow currents beneath the week. Each is read from a basket of dated markets and hard data, not a single headline.
Global monetary tightening spreading to the long end
A week after the Fed's first rise, the move reached the long end of the curve: real ten-year yields rose while inflation compensation barely moved, Norway raised again, and markets put the odds of a second Fed rise in October at about two in three.
Energy as the inflation swing factor tight, and splitting by grade
Talks with Iran came and went inside the week and left Brent where it started, while American crude fell, so the premium on seaborne oil exposed to Hormuz and the Red Sea widened; in Colombia a new government said it would reopen exploration, fracking included.
Trade fragmentation truce with Beijing, blocs elsewhere
Washington and Beijing moved the other way from the blocs: Xi's visit produced an agreement to cut tariffs on $30 billion of goods and pushed the truce to January 10, while the US signed an open-ended basing deal with Denmark and Greenland and its bans on Canadian goods come into force on September 29.
Holding steady
AI sovereignty and open weights setting the price. Open weights now set the price the frontier labs answer to, as the AI lane shows, and two of the three tracked models kept rising: GLM-5.3-Flash's thirty-day count went to 4,332,082 and Bonsai 2 27B's to 3,343,748.
Dedollarization reversing. The dollar index rose another 0.7 percent to 100.97 and gold fell 2.3 percent as real yields climbed, a second week pushing the other way.
China's industrial stack advancing. Xiaomi, a phone maker, released the top-ranked open model of the week under an MIT licence, and Beijing expelled Zhang Youxia, formerly its most senior general, from the Communist Party days before Xi flew to Washington.
The calendar ahead
September 29 The Reserve Bank of Australia decides; US bans on Canadian alcohol, whey, molasses and larger motorcycles take effect
A rise to 4.60 percent is the consensus, and Canstar warns of a second before Christmas.
September 30 US personal consumption expenditure prices for August
The Fed's preferred inflation gauge, and the first big data point since the bond selloff.
October 1 Google launches its first Project Suncatcher satellite
Four TPUs ride a SpaceX Transporter mission to test whether AI chips can run in orbit on solar power.
October 4 Brazil's first round; OPEC+OPEC plus allied producers such as Russia, which coordinate oil output targets. meets on November output
Lula leads Flávio Bolsonaro in the first round in Datafolha's poll, and the runoff is tied.
October 7 Minutes of the September FOMC meeting
Read against a week in which traders moved the October rise to about two in three.
October 25 Serbia's snap parliamentary election
Vučić leads his party's list; the new parliament names the prime minister, and a presidential election must follow by the end of the year.
October 27 Israel's general election
The Supreme Court is expected to rule first on the bans on Ra'am and the Joint List.
October 28 The next Federal Reserve decision
Polymarket closed the week at 64.5 cents for another quarter point.