The bill for the AI boom has started to arrive, and Seoul was first to open the envelope. South Korea’s KOSPI has fallen more than 6 per cent this morning and briefly slipped below 6,000, after a Chinese memory maker claimed a technical breakthrough and Broadcom’s chief executive told a room full of bankers that many AI investors are behaving like gamblers in a casino. Japan’s SoftBank has lost about 8 per cent, Nasdaq futures are pointing lower, and the International Monetary Fund has picked this week to warn that AI companies are now borrowing on a scale that competes with governments for bond money. Into all of that walk the big US banks, reporting from midday UK time, and a US Treasury market reopening after Columbus Day.
The 60-Second Market View
Asia is having a rough Tuesday. The KOSPI is near 5,990, down about 6.2 per cent, having touched roughly 5,911 at its worst. Japan’s Nikkei 225, back from a holiday, is down about 2.3 per cent near 67,466, and Taiwan is off about 1.8 per cent. Hong Kong and Shanghai are only slightly lower, which tells you this is a chip story rather than a China story. US stock futures are mixed: Nasdaq 100 futures are down about 0.8 per cent, S&P 500 futures about 0.2 per cent, and Dow futures are a touch higher.
Oil is a little lower on the day after a strong Monday. West Texas Intermediate is near $92.64 a barrel, down about 1.2 per cent, and Brent is around $105.43, down about 1.1 per cent. Gold futures are near $4,213, up about 0.5 per cent. The 10-year US Treasury yield has eased to about 5.19 per cent as the bond market comes back from its day off, and the dollar is slightly softer, with sterling near $1.3217 and the euro around $1.1170.
What Happened Overnight?
The trouble started on Wall Street on Monday afternoon. The Dow rose 0.38 per cent to 51,850.55, but the Nasdaq Composite slipped 0.44 per cent to 27,245.90 and the S&P 500 ended almost flat at 7,807.24. Underneath, the chip sector had a bad day, with the Philadelphia Semiconductor Index down about 2.7 per cent and memory maker Micron off nearly 4 per cent. The trigger was China’s ChangXin Memory Technologies, known as CXMT, which said over the weekend it had made progress on a new chip design that packs more data into less space and plans to bring out next-generation memory for servers.
Broadcom’s Hock Tan added to the mood. Speaking at a DBS conference in Singapore, he said “a lot of investors have no clue what they’re investing in” and set extreme expectations, adding that “it’s almost like they are in a casino, gambling.” He also said most companies are still struggling to find a return on their AI spending and agreed that the cost of capital, not a shortage of chips, may be the biggest constraint on the build-out. Intel’s chief executive, on the same panel, made a similar point about money. Microsoft, meanwhile, said it will mainly use its own AI chips to handle requests from now on, having relied largely on Nvidia until now.
When Asia opened, Korea took the full force. Samsung Electronics fell close to 8 per cent and SK Hynix nearly 9 per cent, both to their lowest levels since August, and foreign investors sold heavily. The drop was steep enough to trigger a “sidecar”, a five-minute pause on programme selling, for the first time since August. In Tokyo, SoftBank, Tokyo Electron and Advantest led the chip and equipment makers lower.
Elsewhere, the Gulf remains violent and the energy ceasefire remains a claim rather than a fact. Ukraine says Russia struck six of its energy sites on Monday, and the UK’s maritime security agency counted six ships hit in or near the Strait of Hormuz on Sunday alone, the highest daily tally of the war.
The Big Story: Who Pays for the AI Build-Out?
Taken on its own, a Chinese company announcing progress on a memory chip should not knock 6 per cent off a national stock market. Several analysts made exactly that point this morning: CXMT has not shown it can produce at scale, and it is not competing in the high-bandwidth memory that the AI data centres need, where Samsung and SK Hynix still dominate. One strategist called the sell-off “a sign of how vulnerable AI sentiment is at this moment”. That is the real story. The market was looking for a reason, and it found two in one weekend.
The deeper worry is money. AI has been funded by huge amounts of borrowing, and that borrowing is getting more expensive. The IMF’s latest financial stability report, published in Bangkok this morning, says big tech companies now account for about 10 per cent of global investment-grade bond issuance, up from less than 1 per cent in 2024, and that AI-linked debt is now large enough to compete with government bonds for investors’ cash. It also warned that government bond yields could rise in a “disorderly” way. Put that next to a 10-year Treasury yield above 5 per cent and a Federal Reserve still talking about raising rates, and you can see why investors are asking harder questions about how long the spending can last. BlackRock has cut its view on US shares to neutral and moved to favour short-dated Treasuries for the first time in six years.
Korea feels this first because its market leans so heavily on two memory makers, and Japan feels it through SoftBank, which has some of the largest bets on the AI industry anywhere. The test now is whether it travels west. Nasdaq futures down about 0.8 per cent suggest New York is nervous rather than panicking, and the Dow’s gain on Monday shows money moving out of technology and into other parts of the market rather than leaving altogether. Today’s bank results matter for that rotation. If JPMorgan and the others show strong trading and dealmaking, they give investors somewhere else to go. What would calm things: a firm session for US chipmakers at 14:30, a steady Treasury market and no further slide in Seoul tomorrow. What would make it worse: another leg down in Micron and Nvidia, and yields pushing back towards 5.25 per cent.
FX
The dollar has taken a small step back from its recent highs. The dollar index is near 102.4, down about 0.2 per cent, with US yields easing. The euro is around $1.1170, a touch above Monday’s low for the year near $1.1155, and sterling is near $1.3217, with a euro buying about 84.5 pence. The yen is firmer, with USD/JPY near 158.3. Japanese wholesale inflation came in at 6.8 per cent, lower than expected but still high enough to keep a Bank of Japan rate rise on the table, and Governor Kazuo Ueda is appearing before parliament today. In a risk-off morning, a stronger yen is the natural reaction, and it also eases a little of the intervention pressure that builds as the pair heads towards 160.
For the pound, the IMF offered some welcome news. It raised its forecast for UK growth this year to 1.3 per cent from 1 per cent, and its chief economist said Britain stands out among the G7 for getting its borrowing down. On the other side, the Bank of England’s Megan Greene said waiting for second-round inflation effects would leave the Bank acting too late, which keeps the prospect of higher UK rates alive.
Equities
The pain is concentrated in the chip-heavy markets. Korea and Taiwan are the obvious examples, and in Japan the Nikkei is catching up with Monday’s US tech weakness after its holiday. India is slightly higher and Australia roughly flat. Europe ended Monday strongly, before the chip selling gathered pace: the FTSE 100 rose 0.99 per cent to 10,656.28, closing at its high of the day as banks rallied, Germany’s DAX gained 0.76 per cent to 25,277.69 and the Stoxx 600 added about 0.6 per cent. London’s lack of big technology names is helping its case again, but European chip names such as ASML, which reports later this week, will be worth watching at the open.
In the US, earnings season starts properly today. JPMorgan Chase and Wells Fargo are due at around 12:00 UK time, Goldman Sachs around 12:30 and Citigroup around 13:00. Bank shares have had a poor month, with the KBW bank index down nearly 10 per cent as Treasury yields climbed, so the bar is not especially high. Investors will listen for what higher rates are doing to lending, deposit costs and dealmaking, and for any comment on the health of the US consumer.
Bonds
The US Treasury market is open again after Monday’s holiday, and its first reaction is calm. The 10-year yield is near 5.19 per cent, about five basis points below Friday’s close of 5.24 per cent, the 30-year is near 5.56 per cent and the 2-year near 4.77 per cent. Some of that is the usual pull towards safer assets when shares fall. But the bigger tests are still ahead, with Fed Governor Christopher Waller speaking this morning and US inflation data tomorrow. On Monday, Cleveland Fed President Beth Hammack said the Fed should move “relatively quickly” towards a tighter policy stance.
UK gilts are also firmer at the shorter end. The 10-year yield is near 5.39 per cent, down from about 5.45 per cent, while the 30-year is near 5.96 per cent. The Budget on 28 October remains the main event for gilts, and the IMF’s praise for the UK’s fiscal path will be quoted by the Treasury, though economists still reckon the Chancellor faces a gap of around £35 billion to meet his spending promises.
Commodities
West Texas Intermediate is near $92.64, down about 1.2 per cent, and Brent near $105.43, down about 1.1 per cent, after both rose about 2 per cent on Monday. Two things are taking the edge off: hopes for more Russian diesel, which Goldman Sachs reckons will knock only $1 to $2 a barrel off wholesale diesel prices, and Saudi plans to convert a gas pipeline to carry an extra 1.2 million barrels a day of crude to the Red Sea, avoiding Hormuz, within about two months. With ships still being hit in the Strait, this is a small easing on the day, not a turn in the supply picture. Gold is near $4,213 and silver near $60.75, both modestly higher as investors look for shelter.
Today’s Economic Calendar
07:00 — German final consumer prices — Usually confirms the early estimate; a surprise would move eurozone bond yields ahead of the ECB’s next decision.
08:45 — Federal Reserve Governor Christopher Waller speaks — Waller is one of the most closely followed voices on the Fed’s board, so any view on whether October is too soon to raise rates could shift Treasuries and the dollar.
11:00 — US NFIB small business optimism — An early read on how smaller firms are coping with higher fuel costs and borrowing rates.
12:00 to 13:00 — JPMorgan Chase, Wells Fargo, Goldman Sachs and Citigroup results — The first big test of earnings season; strong trading and dealmaking would support the rotation away from tech, while weak lending or rising bad debts would hit the wider market.
14:30 — US stock market opens — The first chance for US chipmakers to respond to the Asian sell-off with a full Treasury market trading alongside them.
15:00 — US existing home sales — With mortgage rates tracking Treasury yields above 5 per cent, housing is where higher rates bite first.
18:00 — Richmond Fed President Tom Barkin speaks — Another read on how the Fed weighs energy-driven inflation against a slowing consumer.
21:00 — Boston Fed President Susan Collins speaks — A late-session view on the rate path before tomorrow’s inflation figures.
The IMF and World Bank meetings continue in Bangkok, and China releases inflation and trade figures overnight. US consumer price data follows on Wednesday at 13:30 UK time.
Levels Traders Are Watching
These are reference points, not predictions. For the KOSPI, 6,000 is the line everyone in Seoul is watching, with this morning’s low near 5,911 just underneath. The Nikkei has 67,000 below it and Friday’s 69,031 close above. On Wall Street, the S&P 500 sits at 7,807 with the record near 7,845 overhead, and for the Nasdaq Composite, Monday’s 27,246 close is the starting point. On bonds, the US 10-year at 5.19 per cent sits between 5 per cent and Friday’s 5.24 per cent, and the UK 30-year gilt near 6 per cent remains the long-end marker. In currencies, EUR/USD has the year’s low near $1.1155, GBP/USD is near $1.32 and USD/JPY 158, with 160 the level where Tokyo has tended to get nervous. Brent has $105 just below and Monday’s $106.65 settlement above, while gold has $4,200 underneath.
Where This Leaves Us
The balance of evidence has shifted towards caution, but not towards panic. A 6 per cent fall in Seoul is dramatic, yet the specific triggers are thin: a Chinese company that has not yet shown it can mass-produce, and a chief executive’s colourful remark about other people’s investors. What gives the move weight is the backdrop. AI spending depends on cheap money, and money is not cheap when the US 10-year yields above 5 per cent and the IMF is warning about disorderly bond markets.
What would change the view? A steady open for US chipmakers, solid bank results and a calm Treasury market would suggest this morning is a Korean shake-out rather than the start of something wider. A further fall in Nasdaq, Micron and Nvidia, yields climbing back towards 5.25 per cent or bank chiefs sounding cautious on the economy would point the other way. The markets worth watching are the KOSPI around 6,000, Nasdaq 100 futures, the US 10-year yield, USD/JPY and the bank shares after midday.
The opportunity in a morning like this is clarity: when a crowded trade wobbles, you find out quickly who understood what they owned. The risk is reacting to the headline rather than the reasons behind it, and abandoning a plan at the moment it looks worst. For newer traders, that is the lesson of Hock Tan’s casino line, whether or not you agree with him: know why you hold a position before the market asks you. If you would like an honest view of how your own approach stands up when the tape turns like this, take the free Trader Assessment and see where you are strongest, and where you need work, before the busy days ahead.
