Identifying the systemic importance and systemic vulnerability of financial institutions based on portfolio similarity correlation network

EPJ Data Science

Table 2 The change in average portfolio similarity between the same types of financial institutions

	2017	2018	2019	2020	2021
Bank-Bank	0.9886	0.9401	0.9286	0.9451	0.9453
Insurance company-Insurance company	0.7496	0.7329	0.7234	0.7140	0.7184
Securities firm-Securities firm	0.8861	0.8137	0.7914	0.8328	0.8611