Across the long arc of modern finance, there are moments when the price of government debt stops being a technical footnote and becomes a mirror held up to a nation's fiscal choices. U.S. Treasury yields approaching 4.8% in September 2026 represent such a moment — not because the number itself is unprecedented, but because it arrives after years of deferred reckoning with structural deficits, demographic pressures, and a Federal Reserve that has stepped back from its role as a reliable buyer. Global bond markets are moving in the same direction, suggesting that what is unfolding is less a uniq