Hot inflation, record AI credit stress and a seven-day chip slide showed that the boom’s limit is no longer demand but the price of money. Investors are rotating rather than fleeing, and the bill is landing far from Silicon Valley.
For three years the AI trade rested on an assumption so familiar that few bothered to state it: money would stay cheap enough for the builders to keep building. This week the bond market withdrew it.
The ten-year US Treasury yield had already pushed above 5.3 per cent earlier this month, its highest since 2002, after the sharpest quarterly rise since 1994. Then came a hot consumer price report on Wednesday and the largest jump in producer prices in four and a half years on Thursday, lifting expectations of further Federal Reserve hikes. The S&P 500 and Nasdaq suffered their worst day since July, with Oracle down nearly 9 per cent. On Thursday Korea’s Kospi fell 7.6 per cent and tripped a circuit breaker as SK Hynix and Samsung each lost about a tenth of their value.
Saxo’s Charu Chanana called it a repricing of the cost of capital.
“Investors are not questioning whether AI demand exists." - Charu Chanana, Chief Investment Strategist, Saxo Bank
Capital is dearest in the borrowed layer of the boom. CoreWeave, whose shares fell 15.5 per cent on Wednesday, saw its 2032 bonds, sold barely four months ago, slip below 80 cents on the dollar, and Bloomberg reported its default swaps pricing a better than 60 per cent chance of default within five years. The IMF has counted 14 circular financing deals since 2023 that moved about $300 billion of equity and $650 billion of debt in exchange for $1.4 trillion of promised future revenue.
The businesses themselves are still growing. TSMC posted a record quarterly profit, up 69 per cent, yet chief executive C.C. Wei said the company would be prudent in planning for 2027. Anthropic told investors its quarterly revenue rose 45 per cent to $16.8 billion, but Reuters reported some backers weighing a lower valuation for its November listing. Growth is still necessary, but it is no longer sufficient. The market now wants to know who earns enough to service the debt.
Thursday showed where the money went. Healthcare and consumer staples led, the Dow gained more than 1 per cent and the S&P 500 edged higher while chips fell for a seventh straight session. Treasuries, supposedly stripped of their haven status, had one of their best days of the year, the ten-year yield easing to about 5.09 per cent despite the inflation data. BlackRock had already cut US equities to neutral and turned bullish on short-dated Treasuries.
“That is emblematic of a defensive rotation. It’s because of the worry that maybe some sort of a debt crisis is emerging.” - Sam Stovall, Chief Investment Strategist, CFRA Research
Australia felt it at the data centre end. The ASX technology sector fell 3.4 per cent on Thursday, with NEXTDC down 7.4 per cent and Megaport more than 10 per cent, while staples rose 3.5 per cent. Further from the centre the arithmetic is harsher. Korea’s market, heavily weighted to two memory makers, sits 39 per cent below its June record, and Nigeria’s finance minister, Taiwo Oyedele, puts the extra cost developing countries pay for their debt at $500 billion.
“We now have an economy that is standing on one leg, the AI leg.” - Kristalina Georgieva, Managing Director, International Monetary Fund
Jefferies noted this week that America’s AI spending, as a share of output, now exceeds what it spent laying railways in the nineteenth century. The comparison cuts deeper than it looks. In September 1873 Jay Cooke and Company, the bank that had sold the Northern Pacific’s bonds to the public, collapsed and the New York Stock Exchange closed for ten days. The railways were built regardless; it was the people holding the paper who were ruined. The AI build-out will very likely outlast this autumn as well, and what the bond market is deciding, one yield at a time, is who will be holding the paper when it does.
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