Basil Halperin: Financial markets focus on long-term trends, the role of mathematical modeling in macroeconomics, and the uncertain impact of AI on growth | Macro Musings

AI's potential to drive rapid economic growth could significantly impact long-term real interest rates.

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Add us on Google by Editorial Team Apr. 30, 2026

Key takeaways

• Financial markets are inherently forward-looking, focusing on long-term trends rather than immediate events.
• Mathematical modeling is crucial in macroeconomics to ensure coherent and accurate economic narratives.
• Historical adaptability of institutions and policies makes extreme economic scenarios unlikely.
• Expectations of significant GDP growth would lead to increased real interest rates.
• Current financial markets do not predict transformative economic growth with high confidence.
• Rapid economic acceleration due to AI is plausible long-term but uncertain in the short to medium term.
• Both rapid economic growth and existential risks can lead to higher interest rates through consumption smoothing.
• The supply of savings plays a significant role in determining interest rates.
• Increased demand for capital from tech firms is contributing to rising interest rates.
• Transformative AI will cause significant sectoral disruptions, requiring effective policy responses.
• Economic models predicting demand collapse often overlook the adaptability of institutions.
• Investors’ expectations in tech hubs like Silicon Valley may not align with broader market predictions.
• Consumption smoothing explains why both growth and risk scenarios can push up interest rates.
• AI’s potential for full automation of human labor could lead to rapid economic growth in the long run.
• Effective policy responses are needed to manage the disruptions caused by transformative AI.

Guest intro

Basil Halperin is an assistant professor of economics at the University of Virginia. He co-authored the paper “Transformative AI, existential risk, and real interest rates,” which analyzes how expectations of transformative AI should raise long-term real interest rates. His research examines AI’s macroeconomic implications, including growth acceleration and pricing frictions.

The forward-looking nature of financial markets

• Financial markets attempt to predict future trends over long durations.

• Financial markets are not just looking at what’s happening right now… they’re trying to predict to five ten twenty years out.

  — Basil Halperin

• This forward-looking approach is crucial for investors and analysts.
• Understanding the dynamics of financial markets involves recognizing their long-term perspective.
• The proactive nature of financial markets is emphasized by their focus on future predictions.
• Financial markets’ long-term focus is a key component of their operation.
• Investors rely on these predictions to make informed decisions.
• The ability to anticipate future trends is a defining characteristic of financial markets.

The role of mathematical modeling in macroeconomics

• Macroeconomic intuition often requires mathematical modeling for coherence.

• You need math to really discipline you to ensure that your stories add up.

  — Basil Halperin

• Mathematical frameworks are essential for accurate macroeconomic analysis.
• Verbal reasoning alone is insufficient in macroeconomics.
• Coherent economic narratives depend on mathematical modeling.
• The complexities of macroeconomic analysis necessitate mathematical frameworks.
• Mathematical modeling ensures that economic stories are coherent and logical.
• The limitations of verbal explanations highlight the need for mathematical approaches.

Historical adaptability of institutions and policies

• Institutions and policies adapt, making extreme economic scenarios unlikely.

• If anything history tells us otherwise institutions adapt policy adapts.

  — Basil Halperin

• Historical evidence suggests adaptability undermines extreme economic models.
• Economic resilience is often due to institutional and policy adaptability.
• Extreme economic scenarios are often unrealistic due to historical adaptability.
• Institutions’ ability to adapt challenges the validity of certain economic models.
• The adaptability of policies plays a crucial role in economic resilience.
• Understanding historical adaptability is key to evaluating economic models.

GDP growth expectations and interest rates

• Expectations of 30% GDP growth would lead to increased real interest rates.

• Real interest rates would go up a lot to frame that I think we can connect this to the monetary policy world…

  — Basil Halperin

• The relationship between GDP growth expectations and interest rates is significant.
• Economic growth expectations directly influence interest rate movements.
• Financial markets react to GDP growth expectations by adjusting interest rates.
• Understanding this relationship is crucial for financial market predictions.
• The connection between GDP growth and interest rates is grounded in economic theory.
• Investors must consider GDP growth expectations when evaluating interest rates.

Market confidence in transformative growth

• Financial markets lack strong confidence in predicting transformative growth.

• Financial markets don’t seem to be predicting that with any sort of strong degree of confidence at least…

  — Basil Halperin

• There is a disconnect between investor beliefs and market predictions.
• Market sentiments do not align with expectations of transformative growth.
• This divergence highlights the complexity of predicting economic growth.
• Investors’ expectations in tech hubs may not reflect broader market predictions.
• Understanding market confidence is crucial for evaluating growth predictions.
• The lack of strong confidence impacts investment strategies and decisions.

The uncertain impact of AI on economic growth

• Rapid economic acceleration due to AI is plausible but uncertain in the short term.

• In the next five years the next ten years even maybe in the next twenty years that’s that’s where the markets are not seeing this.

  — Basil Halperin

• AI’s impact on economic growth is a topic of significant debate.
• The potential for AI-driven growth is recognized but not guaranteed.
• Market predictions reflect uncertainty about AI’s short-term impact.
• Investors must consider the uncertain timeline of AI’s economic impact.
• The long-term potential of AI contrasts with short-term market predictions.
• Understanding AI’s impact on growth is crucial for future economic planning.

Consumption smoothing and interest rates

• Both rapid growth and existential risk can lead to higher interest rates.

• It’s about this consumption smoothing idea… there’s a lot less reason to save this year.

  — Basil Halperin

• Consumption smoothing explains interest rate movements in different scenarios.
• Economic expectations influence savings behavior and interest rates.
• The concept of consumption smoothing is key to understanding macroeconomic dynamics.
• Interest rate movements are linked to expectations of future earnings.
• Investors must consider consumption smoothing when evaluating interest rates.
• Understanding this concept is crucial for predicting economic outcomes.

The supply of savings and interest rates

• The supply of savings significantly influences interest rates.

• That lower supply of savings… pushes up interest rates.

  — Basil Halperin

• Economic principles of supply and demand apply to interest rates.
• A lower supply of savings leads to higher interest rates.
• Understanding the supply of savings is crucial for evaluating interest rate movements.
• This principle is fundamental to macroeconomic analysis.
• Investors must consider the supply of savings when predicting interest rates.
• The relationship between savings supply and interest rates is well-established.

Tech firms’ demand for capital and interest rates

• Higher demand for capital from tech firms is pushing up interest rates.

• The higher demand for capital from openai from microsoft so on and so forth that will also probably is pushing up interest rates already today.

  — Basil Halperin

• Increased borrowing by tech firms correlates with rising interest rates.
• Understanding this relationship is crucial for financial market analysis.
• The demand for capital from tech companies influences interest rate movements.
• Investors must consider tech firms’ capital demand when evaluating interest rates.
• This insight highlights the impact of tech industry dynamics on macroeconomics.
• The correlation between capital demand and interest rates is significant.

The disruptive potential of transformative AI

• Transformative AI will lead to significant disruptions in various sectors.

• There’ll be some transitions right some transition costs some sectors be very disrupted.

  — Basil Halperin

• Effective policy responses are needed to manage AI-driven disruptions.
• The dual nature of AI’s impact includes both growth and disruption.
• Understanding AI’s disruptive potential is crucial for economic planning.
• Policymakers must address the challenges posed by transformative AI.
• The rise of AI necessitates proactive policy measures to avoid dystopian outcomes.
• Investors must consider AI’s disruptive potential when evaluating economic strategies.

Disclosure: This article was edited by Editorial Team. For more information on how we create and review content, see our Editorial Policy.