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央行流动性后盾、银行监管与资产管理机构的风险承担

Central Bank Liquidity Backstops, Bank Regulation, and Risk-Taking by Asset Managers
Management Science · 2025 · Iñaki Aldasoro、Wenqian Huang、Nikola Tarashev

中文摘要

央行流动性后盾与银行杠杆监管在不同金融中介之间以及不同世界状态下相互作用。后盾仅在某些状态下实施,以润滑吸收甩卖资产的银行交易商的运转。它同时也激励资产管理机构承担过度的赎回风险。监管则在其他状态下具有约束力,而在这些状态下,监管束缚了做市活动。由于这一结果提高了资产管理机构的甩卖成本,它抑制了其风险承担。在实证上,我们确认了监管对美国货币市场基金具有的这种约束效应。在理论上,我们推导出这两项政策措施在提升社会福利方面相互补充,因为它们分别针对赎回驱动损失的不同来源——给定风险承担下的甩卖成本与过度风险承担。

Abstract

Central bank liquidity backstops and bank leverage regulation interact across financial intermediaries and states of the world. A backstop is implemented only in some states to grease the wheels of bank dealers that absorb fire sales. It also incentivizes asset managers to take on excessive redemption risk. Regulation binds in other states, in which it hamstrings market making. Because this outcome increases asset managers’ fire sale costs, it reins in their risk-taking. Empirically, we confirm such a disciplining effect of regulation on U.S. money market funds. Theoretically, we derive that the two policy measures complement each other in raising social welfare because they address different sources of redemption-driven losses—fire sale costs for given risk-taking and excessive risk-taking, respectively.
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