arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 2306.00599q-fin.TR
收藏

错误设定价格冲击的代价

The Cost of Misspecifying Price Impact

Natascha Hey, Jean-Philippe Bouchaud, Iacopo Mastromatteo, Johannes Muhle-Karbe, Kevin Webster

AI总结:

本文研究价格冲击模型设定错误对投资组合交易的影响,推导出错误设定代价的解析公式,并揭示低估与高估冲击凹性或衰减所导致的非对称盈亏后果。

摘要:

投资组合经理的订单需要在收益预测与交易成本预测之间进行权衡。收益预测依赖于 alpha 模型,而价格冲击模型则用于量化交易成本。本文研究当交易基于错误的价格冲击模型时会发生什么,即投资组合对其 alpha 信号过度交易或交易不足的情形。我们推导出这些错误设定代价的可解析公式,并在自营交易数据上加以说明。错误设定代价天然具有不对称性:低估冲击凹性或冲击衰减会压缩利润,而高估凹性或冲击衰减甚至可能将利润转变为亏损。

英文摘要:

Portfolio managers' orders trade off return and trading cost predictions. Return predictions rely on alpha models, whereas price impact models quantify trading costs. This paper studies what happens when trades are based on an incorrect price impact model, so that the portfolio either over- or under-trades its alpha signal. We derive tractable formulas for these misspecification costs and illustrate them on proprietary trading data. The misspecification costs are naturally asymmetric: underestimating impact concavity or impact decay shrinks profits, but overestimating concavity or impact decay can even turn profits into losses.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

↑