{'fraction_non_alphanumeric': 0.013729977116704805, 'fraction_numerical': 0.004576659038901602, 'mean_word_length': 4.7631578947368425, 'pattern_counts': {'":': 0, '<': 0, '<?xml version=': 0, '>': 0, 'https://': 0, 'lorem ipsum': 0, 'www.': 0, 'xml': 0}, 'pii_count': 0, 'substrings_counts': 0, 'word_list_counts': {'cursed_substrings.json': 0, 'profanity_word_list.json': 0, 'sexual_word_list.json': 0, 'zh_pornsignals.json': 0}}
Power Laws in Exchange Rate Fluctuations

: This paper analyzes the daily time series of Japanese yen exchange rate against the US dollar by a model of stochastic differential equation whose coefficient oscillates cyclically. The expectation value and the variance of the series are derived by solving the equation. It is shown that their power spectrums are expressed by the power function, w h, where w is the angular frequency and 1.9