VAN R. HOISINGTON AND LACY H. HUNT: A capital shortage in a post-disinflationary era: low saving, deficits near 6% of GDP and high foreign yields push up real rates and risk premiums

The Gist

The country wants to invest more than it saves, the government is borrowing heavily even in good times, and other countries' bonds now pay a lot, so borrowers must pay more to get money. This is a steelman: Van R. Hoisington and Lacy H. Hunt's arguments are reconstructed in their strongest fair form, not endorsed.

Conclusion

The U.S. faces a capital shortage: the 1990 to 2020 disinflationary forces have faded or reversed while low national saving, deficits near 6 percent of GDP late in an expansion and multi-decade-high foreign bond yields push up real interest rates and risk premiums.

Premises

1. The forces that held inflation down from 1990 to 2020 (globalization, an expanding labor supply, abundant capacity, falling capital costs and falling money velocity) have diminished or reversed.
2. Surging capital needs for technology, energy, defense and reindustrialization are colliding with low domestic saving, and net national saving averaged well below historical norms in the first half of 2026.
3. The federal deficit is projected to approach 6 percent of GDP in 2026, unusually high for this stage of an expansion, which further erodes national saving and increases competition for funds.
4. Long-term government bond yields in several major economies are near their highest levels in decades, so higher foreign yields can divert funds from Treasuries and foreign fiscal and inflation concerns can spill over into risk premiums.
5. Fiscal uncertainty and inflation volatility raise the risk premium investors demand for long-term bonds.

Assumptions

• Real rates are set by the balance of global saving and investment demand.
• Financial interest: Hoisington Investment Management manages U.S. Treasury portfolios and for decades was known for holding very long-duration Treasuries on a falling-inflation, falling-rates view. Press reports on its 2026 letters say the firm cut effective duration from about 20.9 years at the end of September 2025 to under one year by June 30, 2026, so this letter's forecast of higher long-term yields is consistent with the firm's current short-duration positioning rather than with its earlier long-duration stance. Sources: "Decades long bull turns bearish. Cites structural deficits…
• Differs: By late October 2026 U.S. Treasury yields were falling across the curve and Japan's 30-year yield had eased to about 3.9 percent, so the global pressure eased after the quarter.

Analysis

Argument type: Inductive.

Potential Fallacies

• Correlation treated as causation / missing bridge (P2–P4 to Conclusion) — Low saving, large deficits and high foreign yields are listed as concurrent conditions and linked to higher real rates and risk premiums. The argument does not rule out common drivers (monetary policy, inflation surprises, growth expectations, safe-asset demand) or reverse causation (higher rates widen deficits). It also supplies no estimate of how much each factor moves rates.
• Scope mismatch (national vs. global saving) (P2, P3 → A1 → Conclusion) — A1 says real rates are set by global saving and investment, but P2 and P3 emphasize U.S. national saving and the U.S. deficit. In an open economy, foreign capital can offset a domestic saving shortfall, so an extra premise about capital mobility or U.S. influence on global saving is needed.
• Ambiguous or loaded term ('capital shortage') (Title and Conclusion) — The term is never defined. It could mean a saving–investment gap, high real rates, or both. If it means high rates, the conclusion partly restates itself. If it means a gap, a separate link to rates is needed. The label also suggests a physical scarcity when the claim is really about a price adjustment.
• Snapshot treated as structural trend (P2, P4 and Conclusion (vs. A3)) — First-half 2026 saving and quarter-end peak yields are used to support a multi-decade regime claim. A3 shows pressure easing soon after the quarter, which the present-tense conclusion does not absorb.
• Overbroad, hard-to-falsify claim bundling (P1) — P1 groups five distinct forces under 'diminished or reversed'. Some of them (falling capital costs, money velocity, capacity) may not have reversed, and the attribution of 30 years of disinflation to these forces is contested. The vague wording lets nearly any outcome be accommodated, so it is hard to test.
• One-sided evidence selection (P1–P5 as a whole) — Only forces pushing rates up are assembled. Offsetting forces (foreign demand for Treasuries, weak growth or recession, AI productivity gains, central bank policy, private-sector saving responses) go unweighed.
• Overlapping, non-independent support (P2, P3, P4, P5) — The deficit is a component of national saving, and the foreign-yield and risk-premium premises share a single channel. Treating them as independent lines of support overstates their cumulative weight.

Counterarguments

These challenges are not ranked.

• Conclusion (High impact) — By late October 2026 Treasury yields were falling across the curve and Japan's 30-year yield had eased (A3). This is the opposite of the predicted direction. It suggests that growth expectations, monetary policy or safe-haven flows dominated the saving-investment pressures, or that those pressures were transitory.
• Premise 2 (High impact) — In an open economy with a reserve currency, foreign capital inflows through the current account can finance U.S. investment. Low national saving therefore need not produce higher real rates. Real rates reflect the global saving–investment balance (A1), and a savings glut or strong safe-asset demand can keep them low.
• Premise 3 (Medium impact) — The empirical link between deficits and long-term yields is weak and unstable. The U.S. in the 2010s, and Japan for decades, ran large deficits and low saving alongside very low yields. A known deficit is also priced in, so only surprises should move yields.
• Premise 1 (High impact) — Disinflationary forces may be weakened but not reversed. Aging, high debt burdens and AI-driven productivity and falling technology and energy costs can remain disinflationary. The authors' own long-held debt-overhang thesis predicted falling inflation and rates, and the argument does not explain why that framework now points the other way.
• Premise 4 (Medium impact) — Foreign and U.S. yields rise together largely because of common global factors, so co-movement is not evidence that foreign yields drive Treasury yields. Some foreign highs reflect country-specific policy shifts, such as Japan's exit from yield-curve control.
• Conclusion (Medium impact) — Higher rates are themselves an equilibrating force. They curb investment demand, raise saving, attract capital and slow growth, which closes any 'shortage'. A recession or an AI capex retrenchment would lower investment demand and pull yields down despite deficits.
• Conclusion (Medium impact) — The firm's short-duration positioning (A2) and its reversal from a long-duration stance mean the forecast is consistent with its commercial interest. This does not make it false, but it lowers the weight of unsupported interpretive claims and invites the charge of narrative-fitting, especially given the firm's earlier wrong-way call.

Suggested Improvements

• Define 'capital shortage' and state the bridging claim — Define the term operationally, for example as a measurable gap between desired investment and domestic plus attainable foreign saving, or as a given rise in real rates above neutral. Add an explicit premise about how U.S. saving and deficits pass through to global real rates (capital mobility, U.S. share of global saving). This closes the gap between the global framing in A1 and the domestic evidence, and removes the risk of circularity.
• Present direct evidence on real rates and term premiums — Show time series of 10-year TIPS yields, term-premium estimates (e.g., ACM or Kim–Wright) and neutral-rate estimates against saving and deficit data. Where possible, give effect-size estimates, such as the basis-point impact of a deficit increase. The conclusion is about rising rates and premiums, yet the premises never show them rising or by how much.
• Separate and substantiate the disinflationary-forces claim — Evaluate each of the five forces separately with data (trade openness, labor-force growth, capacity utilization, capital-goods prices, velocity) and explain which have truly reversed. Reconcile this with the authors' earlier debt-overhang and deflation thesis. This would make P1 testable and distinguish a genuine regime change from a reversal of convenience.
• Address counter-evidence and offsetting forces — Incorporate the post-quarter yield decline (A3), foreign demand for Treasuries, central bank policy, AI productivity effects and recession scenarios. Say how each would change the conclusion. Engaging the strongest opposing view makes the claim more credible, and a falling-yield outcome becomes informative rather than something to explain away.
• Specify horizon, thresholds and falsification criteria — Recast the conclusion as a conditional, time-bounded claim (for example, upside risk to real rates over a stated horizon) and name the outcomes that would count against it. This prevents rising yields from being read as confirmation and falling yields as a temporary reprieve, and aligns confidence with the evidence.
• Quantify the 'surging capital needs' — Provide data on AI, energy, defense and reindustrialization investment, and on how much is financed from retained earnings or abroad versus competing for domestic saving. The demand side of the saving–investment gap is currently asserted, not demonstrated.

Scenario Tests

• Treasury yields fall across the curve and Japan's 30-year yield eases after the quarter, as in late October 2026. (Challenges) — This is the opposite of the predicted direction. It suggests the pressures were episodic or outweighed by other forces such as growth expectations and flight to safety. The thesis holds only if it is explicitly time-bounded or if the easing is shown to be cyclical noise.
• A recession or AI-capex retrenchment cuts investment demand and raises safe-asset demand. (Challenges) — The 'shortage' would disappear because demand collapses, and yields would fall despite low saving and deficits. This shows the conclusion depends on investment demand staying strong.
• Foreign investors, reserve managers or regulatory demand for Treasuries absorb the heavy issuance and finance the investment boom through a wider current-account deficit. (Challenges) — The saving shortfall would not bind on U.S. real rates, which makes P2 and P3 weak predictors of rate pressure and shows the global-versus-national gap in the argument.
• Tariffs, deglobalization, aging and tighter immigration push inflation and its volatility up, while foreign yields keep rising on fiscal worries. (Supports) — Fading disinflationary forces, higher inflation risk premiums and global yield spillovers would reinforce each other. Real rates and term premiums would face sustained upward pressure, which is the core of the thesis.
• Large deficits continue while U.S. real rates stay low, as in the 2010s or in Japan. (Challenges) — Historical episodes of low saving and big deficits coexisted with low yields. Without conditioning variables such as safe-asset demand and monetary policy, the deficit-to-rates mapping is unreliable.
• Foreign yield spikes (JGBs, gilts) are followed by Treasury term-premium increases in event-study data, with declines in foreign Treasury purchases in TIC flows. (Supports) — This would substantiate the spillover and diversion mechanism in P4 and help move the claim from narrative to demonstrated causation.

Coherence & Relevance

The argument has a convergent structure, with several independent-looking pressures pointing toward higher real rates and risk premiums. It is coherent as a directional, probabilistic case but not as a demonstration. The confirmed data are credible, while the key inferential steps (the global-versus-national saving link, the foreign spillover, the net effect after offsetting forces) are assumed rather than shown. The conclusion is stated as a present-tense fact, whereas the premises and A3 support, at most, a time-bounded claim of upward pressure during the quarter. A2 explains the forecast's alignment with the firm's positioning without refuting it. The argument would be sounder if framed as 'upside risk to real rates and term premiums' with explicit mechanisms and falsifiers.

• The forces that held inflation down from 1990 to 2020 have diminished or reversed. (Moderate) — This is background context for the regime-change framing and is nearly restated in the conclusion, so it adds little independent support for the real-rate claim. Its link to the saving–investment mechanism (inflation risk premium versus real rate) is not spelled out.
• Surging capital needs are colliding with low domestic saving, and net national saving averaged well below historical norms in the first half of 2026. (Strong) — Directly relevant to a saving–investment imbalance, but it ties to A1's global framing only through an unstated capital-mobility premise. Investment demand is asserted, not quantified.
• The federal deficit is projected to approach 6 percent of GDP in 2026, unusually high for this stage of an expansion. (Strong) — Relevant through the crowding-out and national-saving channels, but largely overlaps with P2, and the pass-through to yields is not quantified.
• Long-term government bond yields in several major economies are near their highest levels in decades. (Moderate) — The spillover and diversion mechanisms are assumed. Foreign and U.S. yields may share common drivers, and the later easing in A3 weakens the claim that the foreign channel persists.
• Fiscal uncertainty and inflation volatility raise the risk premium investors demand for long-term bonds. (Moderate) — A sound general principle, but it is conditional on uncertainty actually rising and gives no measure of the current premium or its size.

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