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Persistence in high frequency financial data: the case of the EuroStoxx 50 futures prices

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  • Guglielmo Maria Caporale
  • Alex Plastun

Abstract

Differences in the behaviour of asset prices depending on data frequency have not been thoroughly investigated in the literature despite their possible importance. In particular, high-frequency data might contain more information about financial assets because they are updated more rapidly in response to news. This paper explores persistence in high-frequency data (and also daily and monthly ones) in the case of the EuroStoxx 50 futures prices over the period from 2002 to 2018 (720 million trade records) using R/S analysis and the Hurst exponent as a measure of persistence. The results show that persistence is sensitive to the data frequency. More specifically, monthly data are highly persistent, daily ones follow a random walk, and intraday ones are anti-persistent. In addition, persistence varies over time. These findings imply that the Efficient Market Hypothesis (EMH) only holds in the case of daily data, whilst it is possible to make abnormal profits using trading strategies based on reversal strategies at the intraday frequency.

Suggested Citation

  • Guglielmo Maria Caporale & Alex Plastun, 2024. "Persistence in high frequency financial data: the case of the EuroStoxx 50 futures prices," Cogent Economics & Finance, Taylor & Francis Journals, vol. 12(1), pages 2302639-230, December.
    • Handle: RePEc:taf:oaefxx:v:12:y:2024:i:1:p:2302639
    DOI: 10.1080/23322039.2024.2302639
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