arXivDaily arXiv每日学术速递 周一至周五更新
arXiv周末暂无论文更新,休息一下吧,周末愉快~~
arXiv 1308.0652q-fin.RM
收藏

防止金融传染的有效免疫战略

Efficient immunization strategies to prevent financial contagion

Teruyoshi Kobayashi, Kohei Hasui

摘要:

已经提出了许多免疫策略来防止传染性病毒通过网络传播。在这项研究中,我们提出了有效的免疫策略,以防止可能发生在金融网络中的违约传染。与以往免疫策略研究的一个本质区别是,我们考虑了严重副作用的可能性。统一免疫是指银行用一种共同的低风险资产进行“免疫”。免疫银行的风险性将显著降低,但由于去多元化效应,系统性风险水平可能增加。为了克服这种副作用,我们提出了另一种免疫策略,反作用免疫,防止对银行同时失败。我们发现,对抗免疫可以有效地降低系统性风险,而不改变单个银行的风险。

英文摘要:

Many immunization strategies have been proposed to prevent infectious viruses from spreading through a network. In this study, we propose efficient immunization strategies to prevent a default contagion that might occur in a financial network. An essential difference from the previous studies on immunization strategy is that we take into account the possibility of serious side effects. Uniform immunization refers to a situation in which banks are "vaccinated" with a common low-risk asset. The riskiness of immunized banks will decrease significantly, but the level of systemic risk may increase due to the de-diversification effect. To overcome this side effect, we propose another immunization strategy, counteractive immunization, which prevents pairs of banks from failing simultaneously. We find that counteractive immunization can efficiently reduce systemic risk without altering the riskiness of individual banks.

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。

↑