做市商竞争、库存对冲与客户价差
文章 arXiv papers · 作者: Robert Boyce et al.
总结
论文对做市商之间的竞争建模,这些做市商为风险资产报出买价和卖价。做市商在管理库存风险的同时争取客户订单流以获取利润。他们可以通过调整报价吸引方向相反的订单流,论文称之为内部化;也可以直接在市场交易以对冲头寸,称之为外部化。
作者采用变分方法推导出封闭形式的纳什均衡,并据此分析这些选择如何相互作用。研究报告称,依靠客户订单流管理库存的做市商,在与采取外部化策略的做市商竞争时,会增加直接对冲。这会提高所有做市商的对冲成本,并扩大客户价差。所提供的描述陈述了这些均衡结果,但没有给出模型假设、参数值或实证证据,因此仅凭该文本无法判断其对实际市场的适用性。
核心观点
- 做市商通过调整报价吸引方向相反的客户订单流,或直接在市场对冲,以管理库存。
- 论文采用变分方法推导竞争做市商的封闭形式纳什均衡。
- 偏好内部化的做市商与直接对冲的做市商竞争时,会增加外部对冲。
- 该均衡与更高的对冲成本和更大的客户价差相关。
标签
全文
# Competition in Dealer Markets with Internalisation and Externalisation # Competition in Dealer Markets with Internalisation and Externalisation We model a market with multiple dealers who compete for client order flow by dynamically updating their bid and ask quotes for a risky asset. Dealers aim to maximise expected profits while controlling inventory risk by skewing their quotes to attract offsetting order flow (internalisation) or by directly offloading positions in the market (externalisation). Using a variational approach, we derive a closed-form equilibrium for the resulting Nash competition, shedding light on key features of dealer market dynamics. We show that dealers relying on internalisation are compelled to increase their externalisation activity when competing with externalising dealers. This strategic shift in equilibrium leads to significantly higher hedging costs for all dealers and substantially wider spreads for clients.
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。