Two Trees: Asset Price Dynamics Induced by Market Clearing

46 Pages Posted: 27 Nov 2003 Last revised: 24 Aug 2010

See all articles by John H. Cochrane

John H. Cochrane

Hoover Institution; National Bureau of Economic Research (NBER); University of Chicago - Booth School of Business

Francis A. Longstaff

University of California, Los Angeles (UCLA) - Finance Area; National Bureau of Economic Research (NBER)

Pedro Santa-Clara

New University of Lisbon - Nova School of Business and Economics; National Bureau of Economic Research (NBER); Centre for Economic Policy Research (CEPR)

Multiple version iconThere are 2 versions of this paper

Date Written: November 2003

Abstract

If stocks go up, investors may want to rebalance their portfolios. But investors cannot all rebalance. Expected returns may need to change so that the average investor is still happy to hold the market portfolio despite its changed composition. In this way, simple market clearing can give rise to complex asset market dynamics. We study this phenomenon in a very simple model. Our model has two Lucas trees.' Each tree has i.i.d.dividend growth, and the representative investor has log utility. We are able to give analytical solutions to the model. Despite this simple setup, price-dividend ratios, expected returns, and return variances vary through time. A dividend shock leads to underreaction' in some states, as expected returns rise and prices slowly adjust, and overreaction' in others. Expected returns and excess returns are predictable by price-dividend ratios in the time series and in the cross section, roughly matching value effects and return forecasting regressions. Returns generally display positive serial correlation and negative cross-serial correlation, leading to 'momentuem,' but the opposite signs are possible as well. A shock to one asset's dividend a.ects the price and expected return of the other asset, leading to substantial correlation of returns even when there is no correlation of cash flows and giving the appearance of contagion.' Market clearing allows the inverse portfolio' problem to be solved, in which the weights of the assets in the market portfolio are inverted' to solve for the parameters of the assets' return generating process.

Suggested Citation

Cochrane, John H. and Longstaff, Francis A. and Santa-Clara, Pedro, Two Trees: Asset Price Dynamics Induced by Market Clearing (November 2003). NBER Working Paper No. w10116. Available at SSRN: https://ssrn.com/abstract=471466

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Francis A. Longstaff

University of California, Los Angeles (UCLA) - Finance Area ( email )

Los Angeles, CA 90095-1481
United States
310-825-2218 (Phone)
310-206-5455 (Fax)

National Bureau of Economic Research (NBER)

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Cambridge, MA 02138
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Pedro Santa-Clara

New University of Lisbon - Nova School of Business and Economics ( email )

Lisbon
Portugal

HOME PAGE: http://docentes.fe.unl.pt/~psc/

National Bureau of Economic Research (NBER)

1050 Massachusetts Avenue
Cambridge, MA 02138
United States

Centre for Economic Policy Research (CEPR) ( email )

London
United Kingdom

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