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Foreign exchange market fluctuations as random walk in demarcated complex plane

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  • Johnrob Bantang
  • May Lim
  • Patricia Arielle Castro
  • Christopher Monterola
  • Caesar Saloma

Abstract

We show that time-dependent fluctuations $\{\Delta x\}$ in foreign exchange rates are accurately described by a random walk in a complex plane that is demarcated into the gain (+) and loss (-) sectors. $\{\Delta x\}$ is the outcome of $N$ random steps from the origin and $|\Delta x|$ is the square of the Euclidean distance of the final $N$-th step position. Sign of $\{\Delta x(t)\}$ is set by the $N$-th step location in the plane. The model explains not only the exponential statistics of the probability density of $\{\Delta x\}$ for G7 markets but also its observed asymmetry, and power-law dependent broadening with increasing time delay.

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  • Johnrob Bantang & May Lim & Patricia Arielle Castro & Christopher Monterola & Caesar Saloma, 2003. "Foreign exchange market fluctuations as random walk in demarcated complex plane," Papers physics/0308062, arXiv.org.
    • Handle: RePEc:arx:papers:physics/0308062
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