Analyzing the Investment Behavior in the Iranian Stock Exchange during the COVID-19 Pandemic Using Hybrid DEA and Data Mining Techniques

Table 12

Second cluster: efficiency score and investment percentage in 2020.

Cluster	DMU	Company	Efficiency	Percentage
Cluster 2	DMU19	Chemical investment	1	24.4
	DMU10	Multi-industrial investment	1	6.4
	DMU20	Car company	0.92	12.8
	DMU21	Basic metals	0.86	3.8
	DMU23	Bank	0.72	3.8
	DMU09	Computer	0.66	1.3
	DMU11	Extraction of minerals	0.59	2.6
	DMU06	Food products except sugar	0.52	3.8
	DMU04	Cement and lime company	0.44	1.3
	DMU15	Mediators	0.42	1.3
	DMU12	Machinery	0.25	6.4
	DMU17	Telecommunication	0.23	2.6
	DMU22	Technical and engineering	0.17	25.6
	DMU13	Mass, real estate	0.15	1.3
	DMU16	Insurance company	0.08	1.3
	DMU18	Transportation	0.03	1.3