A quiet number buried in the IMF’s 2026 Annual Report deserves louder attention than it’s getting: in just three years, the interest governments worldwide pay just to service their existing debt has jumped from about 2 percent of GDP to nearly 3 percent — “trillions of dollars globally that cannot be spent on education, infrastructure, or other pressing priorities,” in the Fund’s own words. That single fiscal squeeze, radiating out from bond markets centered on US Treasury debt, is quietly reshaping how much room governments everywhere have to spend, borrow, defend themselves, and avoid conflict. Here’s how the dots connect — and where the reporting ends and analysis begins.

First, what the IMF actually documents

The facts, straight from the report, are not in dispute. Global public debt “was already on track to reach World War II–era levels by 2028” — a benchmark last touched during the most expensive war in modern history — even before this year’s Middle East conflict made things worse. “Bond markets have reacted to these dynamics accordingly,” the report notes. “Yields on long-term sovereign bonds have risen and become more volatile.” Large borrowers, facing more expensive long-term borrowing, are increasingly “issuing more short-term debt to manage interest bills” — a workaround that the IMF itself flags as leaving them “more exposed to sudden shifts in short-term funding conditions.”

Crucially, the report draws a direct line from rising debt costs to security spending, in a sentence that reads almost as a throwaway line but carries real weight: “These costs come on top of new defense spending needs, as trade and political uncertainty are increasingly matched by security concerns.” In other words, the IMF itself is telling us that governments are being asked to fund more defense spending at precisely the moment debt servicing is eating a growing share of every budget — a genuine and document-verified tension, not speculation.

The mechanism: how a US bond sell-off becomes everyone’s problem

Here’s where the “global order” part of the story comes in, and where it’s worth being precise about what’s established fact versus informed extrapolation.

The US Treasury market isn’t just America’s problem — it’s the reference point for global borrowing costs, the world’s primary reserve asset, and, increasingly, the collateral base for an entirely new financial layer. The IMF’s report notes something genuinely striking here: “The two largest stablecoin issuers together now hold more US Treasury bills than Saudi Arabia.” That’s not a minor footnote — it means a meaningful chunk of the world’s oil-wealth-scale Treasury holdings has effectively been replaced by crypto-market intermediaries whose stability depends on public confidence rather than sovereign balance sheets.

The report flags exactly why that matters: “stablecoins can become unstable if their underlying assets lose value or if users lose confidence in them; large redemptions could pose a risk to markets for the government bonds held by stablecoin issuers.” It goes further, warning that tokenized, fast-moving digital markets “could speed transactions too much, causing ‘flash crashes,’ in which asset valuations swing widely and too fast for humans to intervene.” Put plainly: a shock to confidence in a major stablecoin could now trigger forced selling of US government bonds fast enough to move yields — which, per the report’s own chapter on advanced-economy debt issuance, already “has global effects, reducing the investor funds available to other sovereign borrowers.” A liquidity event that starts in crypto markets could, in principle, ripple straight into the borrowing costs of unrelated governments around the world.

Where this connects to conflict — carefully

This is the part that requires the most care, because the IMF report does not claim that bond markets cause wars, and neither does this article. What the report does establish, in its own words, is a chain of documented pressures: rising global debt approaching wartime historical levels, sovereign bond yields that have “risen and become more volatile,” rising interest costs competing directly with “new defense spending needs” driven by “security concerns,” and a live example — the Middle East war beginning in February 2026 — of how a conflict compounds every one of those pressures simultaneously, causing what the IMF describes, citing the International Energy Agency, as “the largest-ever cut to global energy supplies.”

The logical connection worth drawing out, without overstating it as an IMF finding, is this: expensive government borrowing doesn’t just constrain domestic spending — it constrains the fiscal room governments have to absorb shocks, respond to instability, or fund the kind of coordinated crisis response the IMF describes assembling for the current war (a coordination group including the International Energy Agency, World Bank and WTO, formed specifically to “share data and assessments of the economic and energy-related impacts of the war in the Middle East”). A world where more of every government’s budget is consumed by interest payments is, almost by definition, a world with less fiscal slack to prevent smaller shocks from cascading into bigger ones — whether that’s a regional conflict, an energy-supply shock, or a financial-market accident. The IMF’s own report frames rising debt and fiscal pressure as compounding, not independent, risks precisely because of this dynamic.

The honest caveat

None of this should be read as the IMF predicting, or even implying, that bond market stress directly “starts” wars — that’s not a claim the report makes, and it’s not one this article is making either. What the report does document, in clear and citable language, is a genuinely uncomfortable convergence: record-adjacent global debt, rising and volatile bond yields, a new and only partially understood risk channel running through stablecoins’ Treasury holdings, and a world already absorbing one major war’s economic shock while carrying more defense-spending pressure than it has in years. Whether that convergence quietly narrows the room governments have to prevent the next crisis — rather than simply respond to it after the fact — is the genuinely open question the IMF’s own numbers raise, even if the institution stops short of answering it directly.