Optimal Inattention to the Stock Market with Information Costs and Transactions Costs
Recurrent intervals of inattention to the stock market are optimal if consumers incur a utility cost to observe asset values. When consumers observe the value of their wealth, they decide whether to transfer funds between a transactions account from which consumption must be financed and an investment portfolio of equity and riskless bonds. Transfers of funds are subject to a transactions cost that reduces wealth and consists of two components: one is proportional to the amount of assets transferred, and the other is a fixed resource cost. Because it is costly to transfer funds, the consumer may choose not to transfer any funds on a particular observation date. In general, the optimal adjustment rule---including the size and direction of transfers, and the time of the next observation---is state-dependent. Surprisingly, unless the fixed resource cost of transferring funds is large, the consumer's optimal behavior eventually evolves to a situation with a purely time-dependent rule with a constant interval of time between observations. This interval of time can be substantial even for tiny observation costs. When this situation is attained, the standard consumption Euler equation holds between observation dates if the consumer is sufficiently risk averse.
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|Date of creation:||2011|
|Contact details of provider:|| Postal: Society for Economic Dynamics Marina Azzimonti Department of Economics Stonybrook University 10 Nicolls Road Stonybrook NY 11790 USA|
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- Eberly, Janice C, 1994.
"Adjustment of Consumers' Durables Stocks: Evidence from Automobile Purchases,"
Journal of Political Economy,
University of Chicago Press, vol. 102(3), pages 403-436, June.
- Janice C. Eberly, "undated". "Adjustment of Consumers' Durables Stocks: Evidence from Automobile Purchases," Rodney L. White Center for Financial Research Working Papers 22-91, Wharton School Rodney L. White Center for Financial Research.
- Eberly, J.C., 1990. "Adjustment of Consumers'durables Stocks: Evidence from Automobile Purchases," Weiss Center Working Papers 22-91, Wharton School - Weiss Center for International Financial Research.