Monday, 14 September 2026

US equities rebounded on Friday as oil prices eased, but stronger-than-expected monthly core CPI reinforced expectations of a Fed rate hike this week; over the weekend, calls to slow frontier AI development and OpenAI’s decision to rule out a 2026 IPO added uncertainty for technology stocks.

S&P 500: +0.86%

Dow Jones: +0.98%

Nasdaq Composite: +0.96%

Performance for Friday, 11 September. Market recap

US 2-year Treasury yield rose approximately 7 basis points to 4.63%. Data

US 10-year Treasury yield rose approximately 1 basis point to 4.96%. Data

Treasury figures use daily constant-maturity yields and may differ slightly from late-session trading quotes.

News

1.) Annual core CPI falls to a five-and-a-half-year low, but firmer monthly inflation prompts Goldman Sachs to forecast a rate hike

* US headline CPI rose 3.4% year on year in August, matching expectations and the previous reading. Monthly inflation accelerated to 0.4% from 0.1%.

* Annual core CPI eased from 2.5% to 2.4%, its lowest since March 2021. However, the monthly increase of 0.3% exceeded expectations of 0.2% and was the largest in four months.

* Energy prices rose 2.1% month on month, including a 3.9% increase in gasoline prices, which accounted for more than one-third of the monthly headline CPI increase.

* Annual shelter inflation continued to moderate, but airfares and hotel accommodation prices picked up, highlighting uneven progress on inflation. CPI report

* Following the release, markets briefly priced approximately a 90% probability of a 25-basis-point September hike. Goldman Sachs also changed its forecast from a hold to a hike on 16 September.

* Goldman’s shift reflects both firmer data and the Fed’s previous hawkish communication, with maintaining policy credibility becoming an important consideration.

* However, further hikes are not Goldman’s base case. The bank still attributes some inflation pressure to temporary factors and does not see clear evidence of an overheating economy. Goldman’s revised forecast

Market impact: Rate-hike expectations support short-term yields and the US dollar, while higher discount rates put pressure on highly valued growth stocks.

Positive offset: Annual core inflation is still declining; if energy pressures ease and monthly inflation cools again, the eventual tightening could be more limited than investors fear.

2.) Multiple rate hikes enter the debate as fiscal deficits and interest costs add pressure to long-term Treasuries

* Market attention is shifting from whether the Fed will hike in September to how long tightening could continue. BMO expects three hikes, while Vanguard considers three a reasonable starting scenario, subject to incoming data.

* This is not a consensus view: Goldman leans towards a single hike, while JPMorgan forecasts increases in September and December, reflecting differing assessments of inflation persistence. Rate-path discussion, Institutional forecasts

* Citi’s quantitative research finds that the combination of economic resilience, inflation momentum and financial conditions increasingly resembles the 1988–1989 tightening period. This is a historical comparison, not a prediction that the same number of hikes will recur. Historical comparison

* The US budget deficit reached $1.97 trillion in the first 11 months of fiscal 2026. Although approximately 5% lower year on year after calendar adjustments, it remains substantial.

* Net interest spending reached approximately $1 trillion over the same period, exceeding defence spending. Refinancing maturing low-cost debt at higher rates continues to increase the fiscal burden.

* The average interest rate on marketable Treasury debt rose to 3.48%, meaning refinancing could keep raising government interest costs even if the policy rate temporarily stabilises. Fiscal report

* For businesses, higher rates increase borrowing and refinancing costs. Investors will pay closer attention to the cash-flow resilience of capital-intensive AI companies and some private-credit borrowers. Financing pressures

Market impact: Inflation, Treasury supply and fiscal risk premiums may constrain a recovery in long-duration bonds and reduce investment returns for companies reliant on debt-funded expansion.

Positive offset: A credible US–Iran agreement restoring Hormuz shipping could lower oil prices and inflation expectations, allowing a near-term Treasury rebound even while fiscal pressures persist.

3.) AI leaders support slower frontier development as OpenAI rules out a 2026 IPO

* Anthropic CEO Dario Amodei called for slower advances in frontier AI capabilities to give safety research, evaluation and control measures time to catch up.

* His proposals include embedding independent evaluators within AI companies, coordinating industry safety standards and pursuing broader international cooperation. Amodei’s essay

* Sam Altman and Elon Musk publicly supported the direction, but these statements do not establish that the industry has signed a uniform, binding slowdown agreement. Industry responses

* Altman said OpenAI will not list in 2026 as it prioritises safety-related work. This does not confirm a listing date in 2027. IPO report

* Investors are concerned that slower expansion in frontier-model training could reduce expectations for new chip, server and data-centre orders, affecting valuations across companies such as Nvidia, AMD and Broadcom.

* However, slowing advances in model capabilities does not automatically mean broad cuts to computing purchases. Inference services, enterprise applications and safety evaluations still require computing resources.

* The key indicators are actual changes to cloud providers’ capital-expenditure guidance, procurement commitments and order deliveries. Predictions of a sharp Monday sell-off remain market opinions, not realised price moves. AI-market discussion

Market impact: AI stocks could face near-term sentiment and valuation pressure, particularly where prices already assume sustained rapid order growth.

Positive offset: If the slowdown mainly affects frontier training while enterprise adoption and inference demand continue growing, AI revenues could still expand, with stronger safety measures supporting longer-term commercialisation.

4.) Google RSI speculation highlights both AI research potential and the need for human oversight

* Recursive self-improvement, or RSI, describes AI helping develop more capable successor systems, which can then accelerate further research. It involves a broader development cycle than ordinary automated coding. Anthropic’s explanation

* Weekend speculation that Google DeepMind had achieved RSI largely relied on model names, API screenshots and purported internal information circulating on social media. The report provided no formal Google confirmation, so it should not be treated as a verified breakthrough. Google-related report

* In a separate interview report, John Schulman and other researchers discussed the possibility of substantial AI-driven research productivity gains over the next one to two years. These are expert forecasts, not achieved results.

* The central challenge is that AI must do more than complete assigned tasks: it must choose useful research directions, assess results correctly and remain reliable through repeated improvements. Researcher discussion

* Meanwhile, Flask creator Armin Ronacher described an Astra coding experiment in which some generated code was excessively compressed and difficult to read or maintain, illustrating that output volume does not necessarily translate into engineering value.

* Code that is difficult for humans to understand does not establish that AI has achieved superintelligence. These examples more directly expose problems with readability, review and maintenance. Developer’s original account

* From an investment perspective, potential research-efficiency gains must be assessed alongside testing, auditing and oversight costs. Converting technical demonstrations into reliable products and sustainable profits remains crucial.

Market impact: RSI expectations could raise estimates of AI’s long-term productivity potential, but unverified breakthrough claims may also amplify technology-stock volatility.

Positive offset: Even without verified full RSI, partial automation in coding and research can create commercial value and support demand for software testing, safety evaluation and governance tools.

Daily

Key developments to watch today

* AI-sector reactions to the weekend’s development-slowdown and IPO news, particularly formal statements from semiconductor, server and cloud-computing companies.

* Middle East developments, Hormuz shipping and oil prices, including changes to negotiation arrangements and actual shipping conditions. Diplomatic headlines remain fluid. Middle East and market developments

Major US economic releases

* No major US economic reports are scheduled for today, 14 September.

* Tomorrow brings the September Empire State Manufacturing Index. The main event this week is the FOMC meeting on 15–16 September.

* The Fed’s rate decision and economic projections are due at 2:00 a.m. Singapore time on 17 September, followed by the press conference at 2:30 a.m. Economic calendar

US technology earnings

* No major US technology giants are scheduled to report today.

* Smaller technology and equipment companies on the calendar include RF Industries (RFIL, communications connectivity products) and Coda Octopus (CODA, underwater imaging and engineering technology). Exact release times remain subject to company announcements. Earnings calendar