Financial Risk Early Warning Based on Wireless Network Communication and the Optimal Fuzzy SVM Artificial Intelligence Model

Table 9

2015–2018 profitability change table.

Report date	2018-12-31	2017-12-31	2016-12-31	2015-12-31
ROA	−0.76	6.9	14.51	2.53
Cost and expense margin	−0.82	14.72	24.76	5.22
Operating profit margin	−0.84	13.27	21.43	1.77
ROE	1.25	11.87	24	6.36