市场如何慢慢消化供求变化
How markets slowly digest changes in supply and demand
摘要：
在这篇文章中，我们从微观结构的角度重新审视了价格形成中的经典问题，回顾了最近的一系列理论和实证工作，解释了供求波动是如何慢慢融入价格的。由于公开市场流动性极低，大宗买卖订单只能在长达数月的时间内逐步交易。因此，订单流是一个高度持久的长记忆过程。保持与市场有效性的兼容性对价格形成、流动性的动态和影响的性质具有深远的影响。我们回顾了一系列理论，这些理论对市场冲击的数量和时间依赖性、买卖价差、订单簿动态和波动性进行了详细的定量预测。与数据的比较产生了一些令人鼓舞的成功。这一框架提出了一种对金融信息的新解释，在这种解释中，代理商充其量只是弱信息，所有代理商都对价格产生类似的、极其嘈杂的影响。大多数经过处理的信息似乎来自供求关系本身，而不是来自外部新闻。这里回顾的想法是相关的市场微观结构监管，代理为基础的模型，成本最优执行策略，并了解市场生态。
英文摘要：
In this article we revisit the classic problem of tatonnement in price formation from a microstructure point of view, reviewing a recent body of theoretical and empirical work explaining how fluctuations in supply and demand are slowly incorporated into prices. Because revealed market liquidity is extremely low, large orders to buy or sell can only be traded incrementally, over periods of time as long as months. As a result order flow is a highly persistent long-memory process. Maintaining compatibility with market efficiency has profound consequences on price formation, on the dynamics of liquidity, and on the nature of impact. We review a body of theory that makes detailed quantitative predictions about the volume and time dependence of market impact, the bid-ask spread, order book dynamics, and volatility. Comparisons to data yield some encouraging successes. This framework suggests a novel interpretation of financial information, in which agents are at best only weakly informed and all have a similar and extremely noisy impact on prices. Most of the processed information appears to come from supply and demand itself, rather than from external news. The ideas reviewed here are relevant to market microstructure regulation, agent-based models, cost-optimal execution strategies, and understanding market ecologies.
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。
