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The Informational Content of Prices When Policy Makers React to Financial Markets

Siemroth, Christoph (2019) 'The Informational Content of Prices When Policy Makers React to Financial Markets.' Journal of Economic Theory, 179. 240 - 274. ISSN 0022-0531

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Abstract

When can policy makers use policy-relevant information from financial market prices and how does policy affect price informativeness? I analyze a novel setting with noise where a policy maker tries to infer information about a state variable from prices to improve policy decisions, and policy in turn affects asset values. I derive a necessary and sufficient condition for the possibility of information revelation in equilibrium, which might not be possible if the policy reaction to prices punishes traders for revealing their information. If the policy maker is uninformed, then policy objectives do not change price informativeness, but they do if the policy maker has independent information about the state. I also analyze policy maker transparency, and find that policy makers with objectives having a large impact on asset values should publish their information before trading to make prices more informative. In other cases, intransparency can be optimal.

Item Type: Article
Uncontrolled Keywords: Asymmetric Information, Central Bank Transparency, Financial Markets, Policy Risk, Price Informativeness, Rational Expectations Equilibrium
Subjects: H Social Sciences > HB Economic Theory
Divisions: Faculty of Social Sciences > Economics, Department of
Depositing User: Elements
Date Deposited: 14 Nov 2018 11:37
Last Modified: 23 Nov 2018 10:15
URI: http://repository.essex.ac.uk/id/eprint/23464

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