In short: On 23 October 2026, Asian shares fell as worries over the enormous funding needs of artificial intelligence hit tech stocks and drove the biggest daily rally in US Treasuries in more than three years, Reuters reported. Investors fled into sovereign bonds and safe-haven currencies, and markets sharply pared back expectations of further Federal Reserve tightening.
What happened on 23 October
According to Reuters' 23 October market report, Asian equities slid as funding anxiety around AI hammered the tech sector. The numbers reported: MSCI's Asia-Pacific index excluding Japan fell 0.3% for its fourth straight weekly loss (down 2.7% for the week), the Nikkei dropped 1.3% (5% for the week), South Korea's KOSPI lost 1.7%, and China's CSI300 fell 1.1% to its lowest since July 2025.
On the bond side, the flight to safety produced the biggest daily Treasury rally in more than three years, per the same report. The move matters because Treasuries are the benchmark "risk-off" asset — the scale of the rally is the clearest measure of how frightened the equity side had become.
The Fed rethink
The repricing hit monetary policy expectations directly. Reuters reported that markets sharply pared back expectations of further Fed tightening: a December hike is no longer fully priced, with the implied probability now around 85%, down from roughly 91%.
The logic, as reported: fears that an AI-bubble burst could derail the data-centre investment boom have grown strong enough to change the rate outlook. The investment cycle in AI infrastructure — which has been a major driver of the recent expansion — is now being priced as a potential source of a US growth scare.
Nomura strategist Charlie McElligott put it bluntly in comments reported by Reuters: "AI is under the cosh... the market seems to be real-time repricing the probabilities of a US growth scare off the back of the AI reset."
The 22 October backdrop: oil, rates and gold
The 23 October moves did not happen in isolation. On 22 October, Brent crude hit a five-month peak near $114 on Houthi attacks against Saudi targets and the United States ordering some diplomats out of Saudi Arabia. That oil rally reinforced the "higher for longer" rate outlook — and gold dropped more than 1% on 22 October as oil-fuelled rate fears rose, as The Hindu BusinessLine reported. We covered that gold move in our 22 October article — this piece picks up the story a day later, when the fear flipped from rate pressure to growth scare.
Why this matters
The shift captures how the AI trade now cuts both ways. The same AI spending that powered the equity rally — the data-centre build-out, the chip capex, the funding rounds — is now being priced as the risk itself. When the market starts asking whether the AI investment boom is sustainable, the stocks that led the rally and the bonds that hedge against its failure move in opposite directions at once.
The currency side of the flight to safety deserves attention too. Reuters reported that investors moved into safe-haven currencies alongside sovereign bonds — the classic dual hedge when equity risk and growth risk arrive together. When both bonds and havens rally while equities fall across Asia, the market is not hedging a single asset class; it is repricing the macro outlook itself.
What "no longer fully priced" means in practice is also worth unpacking. Fed pricing is expressed through futures markets, where traders bet on the future path of rates. A December hike falling from roughly 91% implied probability to around 85% is not a dramatic collapse — but the direction matters. Tightening expectations were being unwound in a single session on the back of funding-fear headlines, not on any Fed communication. That is the market getting ahead of the central bank, pricing a growth scare before any data has confirmed one.
The AI capex question at the center of it all
Strip away the daily noise and the 23 October session was about one question: is the data-centre investment boom sustainable? The AI build-out has been extraordinary — hyperscalers and labs committing vast sums to chips, power and facilities — and equity markets have treated that spending as growth. The fear now being priced is that the funding behind it is shakier than assumed: that AI's enormous funding needs, in Reuters' phrase, could become a liability rather than a growth engine.
This is why McElligott's "AI reset" framing landed. A "reset" implies the market was previously pricing AI investment as almost risk-free expansion, and is now re-estimating the probability that some of that spending doesn't pay off. The knock-on effect is the growth scare: if AI capex slows, the broader economy loses one of its largest sources of investment demand — and the Fed would face a weakening economy without inflation necessarily having cooperated.
What to watch
Two near-term events matter. First, the Federal Reserve meeting on 27–28 October, where any signal about the December path will be read against this new growth-scare pricing. Second, the PCE inflation data due next week — if inflation runs hot while growth fears rise, the Fed faces the worst of both worlds.
Longer term, watch whether the AI funding question keeps escalating. The 23 October session was the market asking a question about the data-centre boom's sustainability; the answer will come from actual capex plans and funding terms in the quarters ahead, not from a single day's trading.
This is market reporting, not financial advice.
Related reading: our 22 October article on gold falling over 1% as the oil rally reinforced rate fears.
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