比特币大额订单数据支持平方根市场冲击关系
文章 arXiv papers · 作者: Jonathan Donier et al.
总结
这项实证研究使用重构了逾一百万笔大额订单的数据,考察 Bitcoin/USD 市场冲击。研究检验了冲击与订单规模之间的平方根关系,发现尽管统计套利和做市活动较少,该模式仍在四个数量级范围内成立。
分析发现,平方根冲击描述的是大额订单的整个执行过程,而不只是最终成交价格。研究还将订单流分为估算的知情和非知情部分;非知情部分与冲击几乎完全的长期衰减相关。作者据此评估市场冲击模型的预测,并提出异质主体模型或可解释观察到的动态。证据仅涉及一个比特币交易所市场,本文没有证明同样的行为普遍适用于其他资产或交易场所。
核心观点
- 研究重构了逾一百万笔 Bitcoin/USD 大额订单,以分析市场冲击。
- 数据中,平方根市场冲击关系在四个数量级范围内成立。
- 平方根关系适用于大额订单执行过程,也适用于最终成交价格。
- 估算的非知情订单流与冲击几乎完全的长期衰减相关。
- 这些发现有助于比较市场冲击模型,但不能证明其普遍适用。
标签
全文
# A Million Metaorder Analysis of Market Impact on the Bitcoin # A Million Metaorder Analysis of Market Impact on the Bitcoin We present a thorough empirical analysis of market impact on the Bitcoin/USD exchange market using a complete dataset that allows us to reconstruct more than one million metaorders. We empirically confirm the "square-root law'' for market impact, which holds on four decades in spite of the quasi-absence of statistical arbitrage and market marking strategies. We show that the square-root impact holds during the whole trajectory of a metaorder and not only for the final execution price. We also attempt to decompose the order flow into an "informed'' and "uninformed'' component, the latter leading to an almost complete long-term decay of impact. This study sheds light on the hypotheses and predictions of several market impact models recently proposed in the literature and promotes heterogeneous agent models as promising candidates to explain price impact on the Bitcoin market -- and, we believe, on other markets as well.
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