New evidence on market response to public announcements in the presence of microstructure noise

Research output: Contribution to journalArticlepeer-review


Market responses to public news announcements are commonly measured by their impact on price returns variance, which allows inference on the value of information and the length of the price discovery process. Recently published articles based on high-frequency data fail to disentangle efficient market price variance from microstructure noise, which produces biased estimates of announcements’ market impacts. By using a Markov Chain framework, we address the shortcomings of previous research and assess the market response to key public information releases affecting agricultural markets. We compare two mechanisms to release public information that have been used in these markets: the trading halt and the real-time. We show how the value of microstructure noise can be used to improve public policy decisions. We find that the real-time release of information brings faster efficient price discovery at the cost of large microstructure frictions. Increases in the cost of noise are not compensated by the improvements in the speed of efficient price discovery. Overall, our findings are highly relevant to public policy and have implications for market design.

Original languageEnglish (US)
Pages (from-to)785-800
Number of pages16
JournalEuropean Journal of Operational Research
Issue number2
StatePublished - Apr 16 2022


  • Microstructure noise
  • Risk analysis
  • Stochastic process
  • Uncertainty modeling

ASJC Scopus subject areas

  • Computer Science(all)
  • Modeling and Simulation
  • Management Science and Operations Research
  • Information Systems and Management


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