Physics – Condensed Matter
Scientific paper
2001-07-04
Physics
Condensed Matter
5 pages, 3 figures, 1 table (To appear in Physica A)
Scientific paper
10.1016/S0378-4371(02)00561-7
We analyze tick data of yen-dollar exchange with a focus on its up and down movement. We show that there exists a rather particular conditional probability structure with such high frequency data. This result provides us with evidence to question one of the basic assumption of the traditional market theory, where such bias in high frequency price movements is regarded as not present. We also construct systematically a random walk model reflecting this probability structure.
Marumo Kouhei
Ohira Toru
Sazuka Naoya
Shimizu Tokiko
Takayasu Hideki
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