Construction of a Fundamental Quantitative Evaluation Model of the A-Share Listed Companies Based on the BP Neural Network

Table 7

Optimization results of the weight of each indicator.

Level 1 indicator	Level 2 indicator	Symbol	Initial weight	Optimized weight
Solvency	Asset-liability ratio	X1	6.79241	6.79240
	Current ratio	X2	7.08412	7.08433
	Quick ratio	X3	8.28635	8.28747
	Cash flow ratio	X4	7.45493	7.45499
Growth ability	Growth rate of operating income	X5	7.58143	7.58136
	Growth rate of net profit	X6	7.61459	7.61451
Operation ability	Inventory turnover rate	X7	7.04270	7.04273
	Turnover rate of accounts receivable	X8	6.98549	6.98539
Profitability	Return on net assets	X10	8.22696	8.22687
	Net profit rate of sales	X11	7.75891	7.75800
	Expense rate during sales period	X12	8.09567	8.09591
	Operating cost rate	X13	8.41013	8.40807
Periodic judgment	Corporate cycle judgment	X14	8.66630	8.66757