October's $2 trillion Nasdaq loss sent investors into bonds, while France and Japan sold off on their own budgets

On the key days of October, AI stocks fell while government bonds rose.

More than $2 trillion in market value was wiped from the tech-heavy Nasdaq 100 in October, as investors asked whether AI spending can pay back quickly enough.² By October 30th the index had fallen over 5.8%.⁶

Money moved into bonds. Reuters reports that investors flocked to bonds, and that the 10-year US Treasury yield fell almost 20 basis points on October 22nd, its biggest one-day fall since early 2023.² A basis point is one hundredth of a percentage point.

The same day, the Nasdaq Composite lost 2.6%, its largest decline since June 5th.⁷ If AI stocks and sovereign bonds were one trade, both would have fallen together. On October 22nd they did not.

France's yield spike traces to its budget and its politics.

France's 10-year government bond yield touched 5.002% on October 21st, the 5% mark and a multi-decade high.⁴ The premium over German 10-year Bunds, the euro-zone benchmark, was around 157 basis points.⁴

Reuters ties the move to a weakened government trying to pass a budget, a hotly contested election next year and widespread protests.⁴ Le Monde reports that Prime Minister Sébastien Lecornu lacks a parliamentary majority for his spending cuts. Even if the budget passes, the deficit would be around 5% of gross domestic product (GDP), and debt would stay around 120% of GDP.⁸

France's finance minister, Roland Lescure, said the government would force the budget through if lawmakers refuse.⁹ None of these sources names AI as a cause of the French selloff.

Japan's yields rise on inflation, pressure for faster rate hikes and fears about Prime Minister Takaichi's spending.

Japan's benchmark 10-year bond yield reached 3% on September 1st. Reuters attributes the rise to concerns about inflation and fiscal health, plus pressure on the Bank of Japan, the central bank, to raise interest rates faster.¹ The government had assumed a 3% long-term rate for its fiscal 2026 budget, so a move above that adds strain.¹ Japan's debt exceeds 200% of GDP.¹

The 30-year yield hit a record 4.235% on October 5th.⁵ At the Ministry of Finance's 30-year auction on October 8th, the average accepted yield was 4.109%.¹⁰

Ryutaro Kimura, senior fixed-income strategist at BNP Asset Management in Tokyo, told Reuters on September 1st how the bond market reads Japan's spending plans.¹

The shared channel is the cost of borrowing: dearer money hurts debt-funded AI spending and lowers the value of other assets.

The IMF says higher sovereign yields raise discount rates and depress valuations across other assets, including AI-related ones, and reduce the value of bonds used as collateral.³ It also says hyperscalers, the largest data center operators, are borrowing more, and investors have borrowed to buy AI stocks.³

The IMF reviewed 14 circular financing deals in the AI sector since 2023. They involve about $300 billion of equity investment and $650 billion of debt, in exchange for $1.4 trillion of future revenue commitments.³

Funding needs are visible in company announcements. Meta Platforms planned a record $97.5 billion fund raise, which raised concerns about shareholder dilution. Microsoft was reportedly planning about $25 billion in bonds.⁶

On October 22nd, all three major hedge fund strategies tracked by Goldman Sachs lost more than 1%, a first since the COVID pandemic. Market participants described deleveraging, with losses in crowded AI-linked trades forcing investors to cut exposure.⁷

These facts show that rising borrowing costs and AI stock losses feed each other through portfolios. They do not show that one leveraged cycle caused both the French and Japanese selloffs.

Coordination is the open question, and the case that it is weaker than in 2008 rests mainly on one strategist's view and thin public finances.

Tina Fordham, founder and geopolitical strategist at Fordham Global Foresight, says current fissures among traditional alliances may make it harder for leading economies to act together as they did in 2008. With less coordination, she says, a 2008-level event could trigger a global depression.² The tide, she said, is AI.²

Total global debt stands at over $350 trillion, a record, according to the Institute of International Finance, almost three times the size of the global economy.² Sheila Bair, who chaired the Federal Deposit Insurance Corporation during the 2008 crisis, worries about the lack of fiscal firepower.²

Bair told Reuters on November 3rd that she sees significant fragilities.²

The IMF finds that banks with 22 percent of global banking assets would fall below regulatory capital limits in its adverse scenario, up from 18 percent a year ago.³ That identifies where a rescue would be tested, but it does not say whether governments would coordinate.

Earnings and demand are strong, and the stress so far has produced no crisis.

Reuters lists reasons for optimism. Recession warnings have proved wrong over two years and Europe's data have been resilient. In the US, 84% of S&P 500 companies that have reported third-quarter results beat consensus estimates, according to LSEG data.²

Microsoft and SpaceX reported results showing AI spending starting to pay off.⁶ John Bilton of JPMorgan Asset Management said growth may have been overestimated, but demand is not going negative in aggregate.⁶ Japan's 10-year auction on September 1st showed robust demand, Deutsche Bank's strategist Shoki Omori said.¹

This reading is strong on today's data. It does not answer what happens if inflation stays high and rates keep rising, the condition Jim O'Neill, a former Goldman Sachs chief economist, names for AI-related debt risks to grow.²

Borrowing costs link the two stresses, but the evidence does not support a single cycle.

Medium confidence that rising yields and AI-linked losses affect each other. The IMF describes the mechanism and the October record shows investor selling.^3,7 Low confidence that one cycle explains France, Japan and AI together. The French and Japanese sources point to budgets and politics, and bonds rose on the biggest AI selloff day.^4,1,2

The strongest alternative reading is that AI strain is a symptom of high rates, not a separate cycle. The record supports that reading as well as ours.

What would change this view: AI stocks and long-dated government bonds falling together over a sustained stretch, or a reported breakdown of talks between major economies on a joint response.

Readers should test exposure to borrowing costs in AI-linked holdings and in sovereign debt separately, then together.

• PE and VC firms: check how portfolio companies in AI infrastructure are financed, and how much of that debt reprices when yields rise.
• Family offices: check whether government bonds really hedge your AI equity holdings, using the October 22nd pattern as the test. French and Japanese bonds have moved for domestic reasons.
• Corporates: review refinancing dates for debt, and the pricing of supplier contracts tied to AI spending.
• Law firms: ask clients for covenant terms on AI-related debt and for collateral that depends on government bond values.

1. Japan's benchmark bond yield rises to 3% for first time in 30 years. Reuters, September 1st, 2026
2. Global markets were already fragile. Big AI bets could break them. Reuters, November 3rd, 2026
3. Global Financial Markets Face Rising Risks From AI, Bond Yields, and Cyberattacks. International Monetary Fund, October 13th, 2026
4. French 10-year bond yields hit 5%, highest since 2002. Reuters, October 21st, 2026
5. Japan's 30-year bond yields hit record high ahead of PM's remarks. The Standard (Reuters), October 5th, 2026
6. Nasdaq faces $2 trillion wipeout in October as AI spending fears deepen. Reuters, October 30th, 2026
7. Hedge fund returns worsen this week as tech selloff deepens. Reuters, October 23rd, 2026
8. French 10-year government bond spread vs Germany highest since 2012. Le Monde, October 20th, 2026
9. French 10-year bond yield hits 5% for first time since 2002 amid unrest. CNBC, October 21st, 2026
10. Auction Result of 30-Year JGBs on October 8, 2026. Japan Ministry of Finance, October 8th, 2026