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银行风险传导研究是系统性金融风险测度与防范的重点. 文献中主要研究静态银行网络拓扑结构和银行系统性风险量化, 较少考虑银行网络之间的状态转变. 针对上述问题, 提出时变状态网络模型. 根据模型, 首先用kmeans方法对各个时间段的银行网络分类, 然后通过有向最小生成树(DMST, directed minimum spanning tree)分析每一类银行网络的拓扑结构, 最后联合利用平面最大过滤图(PMFG, planar maximally filtered graph)方法构建时变银行状态网络, 该网络可用作银行风险源头的寻找和传导时变性分析. 利用时变状态网络模型研究我国15家上市商业银行2007年第四季度到2019第一季度同业拆借数据. 结果表明, 银行状态网络之间的短期连续跳跃性可有效描述金融危机的发生, 比如2008年全球金融危机发生前后出现了两个状态间的短期跳跃, 从2013年“钱荒”到2015年的股灾阶段, 先后出现了四个状态间的短期跳跃. 同时, 各个有向银行状态网络的出度和传染效应成正比, 入度和银行面临风险的稳健程度成反比. 时序的银行状态网络具有记忆性特征, 这可以为央行防范系统性风险提供决策依据.Aiming at the state transition between bank networks, we propose a time-varying state network model. In this model, we classify the bank networks in each time period by the kmeans method, and use directed minimum spanning tree(DMST) method to describe the topological structure of each kind of bank network. We also construct a time-varying bank state network by the planar maximally filtered graph(PMFG) method. The state network can be used to find the source of bank risk and conduct the time-varying analysis. We put into the model the inter-bank lending data of 15 listed Chinese commercial banks from the fourth quarter of 2007 to the first quarter of 2019. The results show that the short-term continuity jump between the bank states can effectively describe the occurrence of financial crisis. For example, before and after the global financial crisis in 2008, there was a short-term jump between two states. From the “money shortage” in 2013 to the stock market crash in 2015, there were four short-term jumps between states. At the same time, the outgoing degree of each directed bank state network is directly proportional to the contagion effect, and the incoming degree is inversely proportional to the steady degree of the risk faced by the bank. The sequential bank state network has the memory characteristic, which can provide the central bank for decision basis to prevent the systematic risk.
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Keywords:
- bank network/
- directed minimum spanning tree/
- risk contagion intensity/
- planar maximally filtered graph
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编号 银行 类型 编号 银行 类型 1 浦发银行 股份制商业银行 2 民生银行 股份制商业银行 3 华夏银行 股份制商业银行 4 招商银行 股份制商业银行 5 兴业银行 股份制商业银行 6 北京银行 地方商业银行 7 上海银行 地方商业银行 8 中国农业银行 国有商业银行 9 中国交通银行 国有商业银行 10 中国工商银行 国有商业银行 11 中国建设银行 国有商业银行 12 中国银行 国有商业银行 13 中信银行 股份制商业银行 14 平安银行 股份制商业银行 15 宁波银行 地方商业银行 
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状态1 状态2 状态3 状态4 状态5 状态6 状态7 状态8 状态1 1.000 0.927 0.918 0.909 0.410 0.949 0.714 0.708 状态2 0.927 1.000 0.968 0.874 0.549 0.911 0.881 0.819 状态3 0.918 0.968 1.000 0.887 0.630 0.911 0.893 0.875 状态4 0.909 0.874 0.887 1.000 0.481 0.963 0.757 0.767 状态5 0.410 0.549 0.63 0.481 1.000 0.422 0.707 0.861 状态6 0.949 0.911 0.911 0.963 0.422 1.000 0.75 0.734 状态7 0.714 0.881 0.893 0.757 0.707 0.750 1.000 0.884 状态8 0.708 0.819 0.875 0.767 0.861 0.734 0.884 1.000 下载:
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银行 状态1出度 状态2出度 状态3出度 状态4出度 状态5出度 状态6出度 状态7出度 状态8出度 头节点数 中心节点数 浦发 0 0 0 0 0 0 0 0 0 0 民生 1 1 1 0 0 0 0 0 3 0 华夏 0 0 0 0 0 0 0 0 0 0 招商 0 0 0 0 0 0 0 0 0 0 兴业 0 0 0 0 0 0 0 0 0 0 北京 0 0 0 0 0 0 0 0 0 0 上海 0 0 0 0 0 0 0 0 0 0 农业 0 5 1 0 0 0 0 0 0 1 交通 0 0 0 1 0 0 0 0 0 0 工商 13 0 5 11 1 12 0 0 1 4 建设 0 0 0 0 0 0 0 0 0 0 中国 0 8 7 1 13 1 13 13 0 5 中信 0 0 0 1 0 0 1 1 3 0 平安 0 0 0 0 0 1 0 0 1 0 宁波 0 0 0 0 0 0 0 0 0 0 下载:
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[1] [2] [3] [4] [5] [6] [7] [8] [9] [10] [11] [12] [13] [14] [15] [16] [17] [18] [19] [20] [21] [22] [23] [24] [25] [26] [27] [28] [29]
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