Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Predictability of Currency Market Exchange   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.

1
The categories of this paper are: cs
30
The categories of this paper are: q-alg
10
The categories of this paper are: q-bio
2
The categories of this paper are: math
14
The categories of this paper are: math-ph
32
The categories of this paper are: atom-ph
27
The categories of this paper are: comp-gas
17
The categories of this paper are: q-fin
23
The categories of this paper are: solv-int
5
The categories of this paper are: gr-qc
37
The categories of this paper are: supr-con
13
The categories of this paper are: quant-ph
35
The categories of this paper are: mtrl-th
15
The categories of this paper are: nucl-ex
34
The categories of this paper are: chem-ph
18
The categories of this paper are: econ