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

Table 8

Second cluster: efficiency score and investment percentage in 2019.

DMU	Company	Efficiency	Percentage
DMU21	Basic metals	1	3.8
DMU20	Car company	1	12.8
DMU19	Chemical investment	1	24.4
DMU23	Bank	1	3.8
DMU10	Multi-industrial investment	1	6.4
DMU09	Computer	0.7	1.3
DMU11	Extraction of minerals	0.62	2.6
DMU06	Food products except sugar	0.51	3.8
DMU04	Cement and lime company	0.4	1.3
DMU15	Mediators	0.3	1.3
DMU17	Telecommunication	0.29	2.6
DMU12	Machinery	0.29	6.4
DMU22	Technical and engineering	0.25	25.6
DMU13	Mass, real estate	0.22	1.3
DMU16	Insurance company	0.15	1.3
DMU18	Transportation	0.03	1.3