策略型做市商下的内幕交易均衡
文章 arXiv papers · 作者: Knut Aase et al.
总结
这项理论研究修改了连续时间 Kyle 内幕交易模型,允许做市商追求利润,而非履行受托责任。做市商拥有市场势力,并利用订单流信息为自己设定有利价格。由此形成的均衡允许做市商获得正的预期利润。
分析表明,与订单流挂钩的适度费用,可能使做市商的利润达到与信息完全的内幕交易者相当或更高的水平。研究还提出一种机制,解释投机价格为何可能比单靠基本面所能预测的波动更大。本文提供的是基于模型的论证,而非实证验证;简短描述也未详细说明模型假设或条件。因此,结论取决于所选均衡设定,不应被视为实际交易场所的直接证据。
核心观点
- 模型允许做市商追求利润最大化,而非履行受托责任。
- 市场势力使做市商能够利用订单流设定有利价格。
- 与订单流挂钩的适度费用可能带来可观的做市商预期利润。
- 模型将策略性定价与超出基本面影响的投机波动联系起来。
- 这些论断属于理论分析,并取决于模型假设。
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全文
# Strategic Insider Trading Equilibrium with a Non-fiduciary Market Maker # Strategic Insider Trading Equilibrium with a Non-fiduciary Market Maker The continuous-time version of Kyle's (1985) model is studied, in which market makers are not fiduciaries. They have some market power which they utilize to set the price to their advantage, resulting in positive expected profits. This has several implications for the equilibrium, the most important being that by setting a modest fee conditional of the order flow, the market maker is able to obtain a profit of the order of magnitude, and even better than, a perfectly informed insider. Our model also indicates why speculative prices are more volatile than predicted by fundamentals.
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