用趋势模式统计衡量加密市场的时间不可逆性
文章 arXiv papers · 作者: Jessica Morales Herrera et al.
总结
本文提出一种时间不可逆性的统计测度,依据收益序列中上升趋势与下降趋势子序列之间的差异构建。研究将不可逆性指数定义为上升趋势模式分布与对应下降趋势模式分布之间的Kullback–Leibler散度。该指数被用于随时间分析比特币、以太坊、瑞波币、莱特币和比特币现金的对数收益。
分析报告称,五种加密货币均存在强烈的不可逆性证据,且测得的特征随时间变化。论文还使用近期提出的信息论测度评估市场效率,再比较低效程度与不可逆性。研究发现,这两种特征之间的关系并不简单。这些结果描述的是统计特性,并非交易策略或已证实的收益来源。文档没有说明采样期、模式构建细节或预测测试,因此不能仅凭报告的不可逆性就将其视为存在可利用的市场低效的证据。
核心观点
- 所提出的不可逆性指数使用Kullback–Leibler散度比较上升和下降趋势子序列的分布。
- 研究对五种具名加密货币的对数收益随时间应用该测度。
- 分析报告称,研究所涉资产普遍存在强烈的不可逆性,且该特征随时间变化。
- 论文使用信息论方法衡量市场低效,并将其与不可逆性进行比较。
- 不可逆性与市场低效之间的关系并非简单对应,单凭二者也不能证明存在交易机会。
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全文
# Trend patterns statistics for assessing irreversibility in cryptocurrencies: time-asymmetry versus inefficiency # Trend patterns statistics for assessing irreversibility in cryptocurrencies: time-asymmetry versus inefficiency In this paper, we present a measure of time irreversibility using trend pattern statistics. We define the irreversibility index as the Kullback-Leibler divergence between the distribution of uptrends subsequences (increasing trends) and the corresponding downtrends subsequences distribution (decreasing trends) in a time series. We use this index to analyze the degree of irreversibility in log return series over time, specifically focusing on five cryptocurrencies: Bitcoin, Ethereum, Ripple, Litecoin, and Bitcoin Cash. Our analysis reveals a strong indication of irreversibility in all these cryptocurrencies and the characteristic evolves over time. We additionally evaluate the market efficiency for these cryptocurrencies based on a recently proposed information-theoretic measure. By comparing inefficiency and irreversibility, we explore the relationship between these statistical features. This comparison provides insight into the non-trivial relationship between inefficiency and irreversibility.
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