Comprehensive analysis of market conditions in the foreign exchange market: Fluctuation scaling and variance-covariance matrix

Aki Hiro Sato, Takaki Hayashi, Janusz A. Hołyst

Research output: Contribution to journalArticle

6 Citations (Scopus)


We investigate quotation and transaction activities in the foreign exchange market for every week during the period of June 2007 to December 2010. A scaling relationship between the mean values of number of quotations (or number of transactions) for various currency pairs and the corresponding standard deviations holds for a majority of the weeks. However, the scaling breaks in some time intervals, which is related to the emergence of market shocks. There is a monotonous relationship between values of scaling indices and global averages of currency pair cross-correlations when both quantities are observed for various window lengths Δt.

Original languageEnglish
Pages (from-to)167-179
Number of pages13
JournalJournal of Economic Interaction and Coordination
Issue number2
Publication statusPublished - 2012 Oct 1



  • Fluctuation scaling
  • Foreign exchange market
  • Global average of cross-correlations
  • Scaling breaking

ASJC Scopus subject areas

  • Business and International Management
  • Economics and Econometrics

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