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arXiv 2102.02121q-fin.MF
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人工智能应用于金融系统性风险管理中的救助决策

Artificial intelligence applied to bailout decisions in financial systemic risk management

Daniele Petrone, Neofytos Rodosthenous, Vito Latora

摘要:

我们将政府对银行的救助描述为马尔可夫决策过程(MDP),其中的行动是股权投资。潜在的动力来自于由相互暴露联系在一起的金融机构网络,负回报与银行的违约有关。每个节点代表一家银行,并与单位时间(PD)的违约概率相关联,该概率取决于其资本,并因相邻节点的违约而增加。政府可以通过向银行提供额外的资本来控制网络的系统性风险,降低银行的PD,但代价是在银行破产时增加风险敞口。考虑到欧洲全球系统重要性机构的网络,我们找到了解决MDP的最优投资政策,为政府和监管机构提供了限制金融危机影响的最佳行动方式的直接指示。

英文摘要:

We describe the bailout of banks by governments as a Markov Decision Process (MDP) where the actions are equity investments. The underlying dynamics is derived from the network of financial institutions linked by mutual exposures, and the negative rewards are associated to the banks' default. Each node represents a bank and is associated to a probability of default per unit time (PD) that depends on its capital and is increased by the default of neighbouring nodes. Governments can control the systemic risk of the network by providing additional capital to the banks, lowering their PD at the expense of an increased exposure in case of their failure. Considering the network of European global systemically important institutions, we find the optimal investment policy that solves the MDP, providing direct indications to governments and regulators on the best way of action to limit the effects of financial crises.

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。

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