CBO chief warns it’s ‘probably not plausible’ that a strong economy alone can steady U.S. debt as 5%-6% growth is needed—more than Bessent’s 3% view

The investable signal is not imminent Treasury funding stress; it is a higher structural term premium and greater sensitivity to supply-demand shocks at the long end. A growth surprise is not an unambiguous fiscal positive: if it lifts real rates and inflation expectations, higher interest expense can offset revenue gains before the tax base compounds meaningfully. AI productivity is therefore a long-dated fiscal option, not a near-term hedge for duration. Separately, hyperscaler borrowing competes for fixed-income capacity and can raise financing costs for other capital-intensive, long-duration businesses.

Over days, growth, oil and Fed repricing can dominate fiscal concerns, so avoid treating every yield move as a debt-credibility event. Over 1–3 months, watch Treasury auction demand, term-premium measures and any budget/tax negotiations for evidence that investors are demanding more compensation. Over 6–18 months, persistently heavy issuance or an abrupt rate shock could reinforce the debt-interest feedback loop; the CBO’s forthcoming productivity assumptions are a catalyst, but not proof of realized AI-driven revenue gains.

Contrarian point: the small estimated marginal yield effect of debt alone argues against forecasting a near-term U.S. solvency crisis. The risk is cumulative and nonlinear, not a mechanical one-for-one repricing. A strong economy, credible fiscal adjustment or durable productivity gains could keep demand resilient and reverse a steepening trade.