Figure 2

Portfolio similarity correlation network from 2017 to 2021 for 56 financial institutions in China. Figure 2(a) to Fig. 2(e) depict the portfolio similarity correlation network map from 2017 to 2021, with orange nodes representing banks, yellow nodes representing insurance companies, and blue nodes representing securities firms, and the thickness of the connected edges reflecting the magnitude of portfolio similarity between financial institutions. Note that the names of financial institutions in Fig. 2 are represented by their English abbreviations, and the specific correspondence is shown in the Appendix