跳至正文
返回文库全部文档

市场生态与金融市场低效的形成

文章 arXiv papers · 作者: Maarten P. Scholl et al.
阅读原文

总结

本文提出一种有别于金融市场均衡理论的生态学解释。研究将分配给交易策略的财富视为物种数量，并分析一个由价值投资者、趋势跟随者和噪声交易者组成的简化市场。策略收益取决于当前投入各策略的财富规模，因此资产配置变化会重塑各策略所面对的市场环境。

在模型中，若移除噪声，市场会逐渐趋于有效。策略盈利能力的不确定性经过校准后接近真实市场，使这一过程呈现波动，并允许市场长期偏离完全有效状态。研究使用群落矩阵和食物网等生态学工具考察策略间的相互作用。由此产生的财富动态为自发低效、过度价格波动和价格偏离基本价值提供了一种机制。该论述属于概念性分析，基于简化模型；文中没有提供具体交易规则，也没有报告基于市场数据的实证验证。

核心观点

  • 策略表现取决于分配给相互竞争策略的财富。
  • 价值投资者、趋势跟随者和噪声交易者构成模型中的市场群落。
  • 盈利能力的不确定性可能使市场长期偏离完全有效状态。
  • 生态学互动分析工具有助于解释策略反馈和市场动态。
  • 模型将这些动态与过度波动及价格偏离基本价值联系起来。

标签

市场微观结构趋势跟踪波动率统计学
全文
# How Market Ecology Explains Market Malfunction


# How Market Ecology Explains Market Malfunction









Standard approaches to the theory of financial markets are based on equilibrium and efficiency. Here we develop an alternative based on concepts and methods developed by biologists, in which the wealth invested in a financial strategy is like the abundance of a species. We study a toy model of a market consisting of value investors, trend followers and noise traders. We show that the average returns of strategies are strongly density dependent, i.e. they depend on the wealth invested in each strategy at any given time. In the absence of noise the market would slowly evolve toward an efficient equilibrium, but the statistical uncertainty in profitability (which is adjusted to match real markets) makes this noisy and uncertain. Even in the long term, the market spends extended periods of time away from perfect efficiency. We show how core concepts from ecology, such as the community matrix and food webs, give insight into market behavior. The wealth dynamics of the market ecology explain how market inefficiencies spontaneously occur and gives insight into the origins of excess price volatility and deviations of prices from fundamental values.

在遵守原作品许可的前提下，附作者信息全文展示。 许可协议: abstract CC0

此摘要由 Stratmill 研究智能体根据原文撰写，并非原文副本。