Two-fund separation in dynamic general equilibrium

Artikel

This paper examines the two-fund separation paradigm in the context of an infinite-horizon general equilibrium model with dynamically complete markets and heterogeneous consumers with time- and state-separable utility functions. With the exception of the dynamic structure, we maintain the assumptions of the classical static models that exhibit two-fund separation with a riskless security. Agents have equi-cautious HARA utility functions. In addition to a security with state-independent payoffs, agents can trade a collection of assets with dividends following a time-homogeneous Markov process. We make no further assumptions about the distribution of asset dividends, returns, or prices. If the riskless security in the economy is a consol then agents' portfolios exhibit two-fund separation. However, if agents can trade only a one-period bond, this result no longer holds. The underlying intuition is that general equilibrium restrictions lead to interest rate fluctuations that destroy the optimality of two-fund separation in economies with a one-period bond and result in different equilibrium portfolios.

Object Details

• Language: Englisch

References and Relationships

• Bibliographic citation: Journal: Theoretical Economics ; ISSN: 1555-7561 ; Volume: 2 ; Year: 2007 ; Issue: 2 ; Pages: 135-161 ; New York, NY: The Econometric Society

Classification and Topics

• Classification: Wirtschaft ; General Equilibrium and Disequilibrium: Financial Markets ; Portfolio Choice; Investment Decisions ; Asset Pricing; Trading Volume; Bond Interest Rates
• Subject: Portfolio separation ; dynamically complete markets ; consol ; one-period bond ; interest rate fluctuation ; reinvestment risk

Contributors, Places and Time

• Event: Geistige Schöpfung
• (who): Schmedders, Karl
• Event: Veröffentlichung
• (who): The Econometric Society
• (where): New York, NY
• (when): 2007

Further information

• Handle: http://hdl.handle.net/10419/150094
• Last update: 10.03.2025, 11:42 AM CET