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

Table 13

Third cluster: efficiency score and investment percentage in 2020.

Cluster	DMU	Company	Efficiency	Percentage
Cluster 3	DMU01	Sugar and candy	1	0.8
	DMU02	Other nonmetallic products	1	1.3
	DMU03	Tile	1	0.2
	DMU07	Medicinal investment	1	4.9
	DMU10	Multi-industrial investment	1	4.7
	DMU19	Chemical investment	1	17.6
	DMU20	Car company	0.92	8.0
	DMU21	Basic metals	0.86	8.4
	DMU23	Bank	0.72	16.5
	DMU09	Computer	0.66	1.4
	DMU11	Extraction of minerals	0.59	3.6
	DMU14	Drilling company	0.54	1.2
	DMU08	Manufacturing company	0.53	1.4
	DMU06	Food products except sugar	0.52	3.3
	DMU05	Investment	0.48	0.5
	DMU04	Cement and lime company	0.44	2.6
	DMU15	Mediators	0.42	2.5
	DMU12	Machinery	0.25	4.1
	DMU17	Telecommunication	0.23	4.8
	DMU22	Technical and engineering	0.17	6.8
	DMU13	Mass, real estate	0.15	2.0
	DMU16	Insurance company	0.08	2.5
	DMU18	Transportation	0.03	0.9