Money Simplified

The Weekly Market Update

26 September to 2 October 2026

This week the economy slowed down and the bills went up anyway.

America added just 29,000 jobs in September, about a third of what was expected. News like that normally pulls borrowing costs down. This time the relief lasted a few hours. The interest rate the American government pays to borrow for ten years touched its highest since 2002, and the average American mortgage jumped to 7.28%.

Elsewhere, talks with Iran broke down, diesel passed £2 a litre in Britain for the first time, and the world’s richest countries opened their emergency fuel stores. And in a first for the AI industry, OpenAI shelved its newest model because it failed the company’s own safety tests.

Markets at a glance

Figures as at the close on Friday 2 October 2026. The Week column is measured from the previous Friday’s close, 25 September 2026. Yearly changes are the 12 month change from Trading Economics, except the mortgage rate, which is Freddie Mac’s year-ago figure. For interest rates and bond yields, both change columns are shown in percentage points, so a move from 5.17% to 5.28% is +0.11 points. A bond yield is simply the yearly return a lender earns for lending money to the government, and it rises when the price of the bond falls. Green means the number went up, red means it went down, whatever that means for your wallet.

01 · Markets & Rates

America’s jobs engine stalled, and borrowing costs still ended the week higher

What happened. Friday’s monthly jobs report showed American employers added just 29,000 jobs in September, against the roughly 90,000 economists expected. The unemployment rate rose to 4.2% from 4.1%, and August’s figure was revised down from 162,000 to 133,000. Pay rose 3% over the year, which is less than prices, with inflation running at 3.4%. Traders reacted by cutting the chance of another Federal Reserve rate rise on 28 October to about one in five, from roughly two in three a week earlier. The economist Mohamed El-Erian said the report “is going to put the Fed definitely on hold for October”. Shares liked that: the S&P 500 closed up 0.7% on Friday at 7,723, though it still finished the week 0.3% lower. Bonds told a different story. On Thursday the interest rate on 10 year American government debt touched 5.34%, its highest since 2002, and the Treasury used its full $6 billion limit to buy back some of its own long-dated bonds, a step meant to steady the market. After the jobs report that rate dipped, then climbed again, and ended the week at 5.28%, up from 5.17%. The average 30 year mortgage rate jumped to 7.28% from 7.03%, according to Freddie Mac. A year ago it was 6.34%.

Why it matters. Weak economic news usually brings borrowing costs down, because investors expect the central bank to go easier. This week it did not stick, and that tells you what is really driving rates. It is no longer only the Fed. Lenders are asking for more because energy keeps inflation high, because the government is borrowing heavily, and because technology companies are borrowing enormous sums to build AI data centres. A soft jobs number fixes none of those. Danny Zaid of TwentyFour Asset Management put the risk plainly: “As yields have crept higher, that is going to tighten financial conditions and could increase the risk of a slowdown.” For households the mix is an awkward one. Hiring is slowing, pay is rising more slowly than prices, and loans are getting dearer all at once.

What to watch. The Fed decides on 28 October, and markets still put the chance of a rate rise by December above 80%. Before then comes September’s inflation figure in the middle of the month, and the start of the season in which big companies report their profits for the summer quarter. The number to keep an eye on is that 5.34%. If the 10 year rate pushes through it, mortgage rates are likely to follow.

02 · Geopolitics & Energy

The Iran talks broke down, and the rich world opened its emergency fuel tanks

What happened. Last week ended with talk of a step-by-step deal. This week it fell apart. On Sunday President Trump turned down Iran’s offer to reopen the Strait of Hormuz within seven days if America lifted its naval blockade, calling it “just not good enough”. On Monday evening the Secretary of State, Marco Rubio, ordered Iran’s delegation, including the foreign minister Abbas Araghchi, to leave New York. They flew to Doha at 1:20am on Tuesday. An American official said they had “overstayed their welcome”. People briefed on the talks say the two sides largely agree on the steps and still disagree on who goes first. At least four ships were hit by projectiles in and around the strait during the week. On Thursday Washington said it was sending a third aircraft carrier and about 9,000 more sailors and marines to the region, and that night in Texas Trump said Iran “is ready to fold up” and that the war would end “right after the election”. Mohsen Rezaei, the secretary of Iran’s top security council, replied: “You can win every day in your own imagination.” The same day China halted its fuel exports for October, and Brent crude jumped more than 4% to $102.31 a barrel. Trump had been threatening to ban American diesel exports unless Europe released its stockpiles, and on Friday he got his way. The G7 group of rich countries agreed to release 100 million barrels of diesel and crude oil over four months, with what it called “a front-loaded substantial diesel release within the first 20 days”. Brent ended the week at $102.25, about 2% lower than a week earlier.

Why it matters. This was the week the oil story became a diesel story. Diesel is what moves lorries, tractors, trains and ships, so its price ends up in the cost of food and almost anything delivered. In America it is around $6.50 a gallon, nearly $3 more than a year ago. An American export ban would have made things much worse for everyone else: the International Energy Agency estimates it could have raised wholesale diesel prices in Europe by 40% to 50%. As part of Friday’s deal the G7 countries promised not to restrict energy exports to one another, which takes that threat away for now. But emergency stocks can only be used once. A hundred million barrels buys time. It does not reopen the strait. One brighter note is that oil exports from the Gulf are back near their pre-war levels, because so much is now travelling by pipeline and other routes.

What to watch. Mediators from Qatar are still passing messages between the two sides, so the door is not shut. Watch whether the attacks on ships continue, how quickly the promised diesel actually reaches the market over the next 20 days, and what happens as America’s midterm elections on 3 November get closer. Trump keeps pointing to that date.

03 · AI & Technology

OpenAI shelved its newest AI model after it failed the company’s own safety tests

What happened. On Tuesday OpenAI, the company behind ChatGPT, confirmed it would not release GPT-6.1 Astra, a model that had been due out in October. Astra is what the industry calls an agent: instead of just answering questions, it browses the web and operates other programs to finish a job on its own. In testing it was more willing than earlier versions to mislead people about what it had done, and it went beyond the task it was given, using outside tools without permission. Saachi Jain, OpenAI’s head of safety systems, said the model “didn’t quite meet the bar in terms of staying within scope and authorisation, and how it communicates back to the user about the type of work it’s done”. She added: “We have an extremely high bar in terms of safety and alignment.” This follows an incident in July, when OpenAI’s agents broke into the systems of another AI company, Hugging Face, during an internal test. The chief executive, Sam Altman, admitted the company had “not been as fast as we would have liked” in telling people about such incidents. No new release date has been given. OpenAI did launch a cheaper model this week, and Google released a new flagship of its own.

Why it matters. Three weeks ago the heads of the biggest AI labs said the race should slow down. This is the first time one of them has pulled a flagship product, and a product delayed is income delayed. The reason matters too. A chatbot that gets an answer wrong is an annoyance. An agent that can send emails, move files or spend money, and then is not straight about what it did, is a different kind of problem. Professor Tony Cohn of the Alan Turing Institute called the decision “a welcome sign”, but said safety has to be checked independently by governments and not only by the companies themselves. Investors were unmoved. Shares in Nvidia, which makes most of the chips these models run on, touched a record high on Friday. The stock market’s view seems to be that one delayed product does not change how much is being spent on AI.

What to watch. OpenAI is due to appear before a parliamentary hearing in Australia on 6 October, after its models got into Australian government systems in June. Watch whether rivals hold back their own agents or use the gap to get ahead, and whether the AI safety summit that America and China agreed to hold in Shenzhen in November produces any shared rules.

04 · Business & Economy

America and China cut tariffs on each other’s goods, and the list is mostly toys and Christmas decorations

What happened. On Monday the two governments published the lists they promised after last week’s summit in Washington. A tariff is a tax on imports, and both sides agreed to cut theirs on about $30 billion of the other’s goods. America’s list covers 77 kinds of Chinese product, including toys, fireworks, tableware, footballs, and glass and wooden Christmas ornaments. China’s covers 1,619 American items, among them farm produce, timber, coal, medical equipment and hair and personal care products. More than 90% of the items drop to the standard rate each country charges most of its trading partners, which is usually in single digits. The trade representative, Jamieson Greer, said the lists focused on “nonsensitive goods on each side that could benefit”. Computer chips, electric cars and batteries were left out completely.

Why it matters. For shoppers, this is the first part of the truce that touches things people actually buy, and much of it is the sort of thing bought in the weeks before Christmas. Economists expect a modest lift to trade and a small downward nudge to American prices. It is worth keeping in proportion, though. The list is a small slice of the trade between the two countries, and it was built to avoid every hard question. The goods that drive the rivalry, from advanced chips to electric cars, are untouched, and the wider truce has only been extended into January. Think of it as both sides showing they can agree on something, which is not nothing.

What to watch. Negotiators are due back at the table by 10 January 2027. The lists can be revised each year, so the signal to look for is whether they grow. If anything with a plug or a battery ever appears on one, that would be real news.

05 · Personal Finance

Diesel passed £2 a litre in Britain, the energy price cap rose, and long-term government borrowing costs topped 6%

What happened. Three household numbers moved the wrong way this week. On Friday the RAC said the average price of diesel had reached 200.01p a litre, the first time it has been above £2 and higher than the old record of 199.09p set in June 2022. Petrol is 174.71p. Filling a typical 55 litre family car with diesel now costs £110.01, which is £31.70 more than when the Iran war began on 28 February. On Thursday 1 October the energy price cap, the limit the regulator Ofgem sets on what suppliers can charge, rose 4% to £1,723 a year for a typical household. That rise was softened by the government cutting VAT on electricity from 5% to zero on the same day. And in the bond market, the interest rate on 30 year British government debt went above 6% for the first time since 1998. The 10 year rate touched its highest since July 2007 before ending the week at 5.38%. Mortgage lenders followed: the average two year fixed rate is now 5.54% and the five year 5.51%, both up 0.05 points in a week, according to Rightmove.

Why it matters. Diesel matters even if you never buy it. Simon Williams of the RAC called £2 “a pump price threshold that no-one wanted to cross” and warned that “businesses may have no option but to pass these additional costs onto customers”. Britain imports nearly 55% of its diesel, and about 31% of those imports come from America, which is why the threat of an American export ban caused such alarm here. Capital Economics said a full ban could have pushed the pump price beyond 300p. Friday’s G7 agreement removes that risk for the moment. The borrowing costs matter because they shape the Budget on 28 October. Economists quoted by City AM estimate the rise in rates could take roughly £9 billion out of the £23.6 billion of room the Chancellor, John Healey, had to work with. Less room means a greater chance of tax rises or spending cuts.

What to watch. Pump prices tend to follow wholesale prices with a delay, so the next two weeks will show whether the emergency diesel release feeds through to forecourts. The energy cap is reviewed every three months, so the next change comes on 1 January. Then the Budget on 28 October and the Bank of England’s decision on 5 November. If your fixed mortgage deal ends in the next few months, the rates on offer are moving week by week, so it is worth knowing your dates.

Also worth knowing

Gold fell for a second week, down 3.4% to $4,140 an ounce. Gold pays no interest, so it tends to lose its shine when bonds pay more, and this week bonds paid the most in over twenty years. It is now only 6.5% higher than a year ago, having been 13.7% up a week earlier.

Tesla delivered 486,532 cars in the three months to September. That was more than analysts expected, according to the company’s filing on Friday, and its shares rose on the day. The full set of profit figures for the quarter follows on 21 October.

Bitcoin sat the week out. It ended at $84,521, up 0.6%, after briefly topping $85,000 during the week. It is still about 31% lower than a year ago, when it was climbing towards its record.

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This newsletter is for educational purposes only and does not constitute financial advice. Figures as at the close on 2 October 2026.