Information Leakage and Market Efficiency

Markus Brunnermeier

The Review of Financial Studies, 2005, vol. 18, issue 2, 417-457

Abstract: This article analyzes the effects of information leakage on trading behavior and market efficiency. A trader who receives a noisy signal about a forthcoming public announcement can exploit it twice. First, when he receives it, and second, after the public announcement since he knows best the extent to which his information is already reflected in the pre-announcement price. Given his information he expects the price to overshoot and intends to partially revert his trade. While information leakage makes the price process more informative in the short-run, it reduces its informativeness in the long-run. The analysis supports Securities and Exchange Commission's Regulation Fair Disclosure. Copyright 2005, Oxford University Press.

Date: 2005
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