portfolio (Tang, 2004) 2. Mean-Variance , (Markowitz, 1952) 3. Sharpe ratio (Sharpe., 1994) 4. MA (Metghalchi et al., 2021) 10 1 2( .... )nP P PSMA n + + = 1 ( ) ( ) N P i i i E R w E R = = Tw w ( ) fE R R
* ". (* O B.. 2550) Cedears Assets Market Value (MIO) 0 200 400 600 800 1000 1200 Ma r-0 3 Ap r-0 3 Ma y- 03 Ju n- 03 Ju l-0 3 Au g- 03 Se p- 03 Oc t-0 3 No v- 03 De c-0 3 Ja n- 04 Fe b- 04 Ma r-0 4 Ap r-0 4
0 per square uilding is an in (1) at d") to Ladpra e of the land in (2) to op Company Lim rice of Bt191 der other ma Limited ecretary wah, or app n open air sp Baht 0.17 m ao Education d portion of
Name of directors y 2020 otification on th irector and Ma he Stock Exch s Nation Mult 0 on 28 Janu Limited (“NNV cent of the tot e World Com registered ca ounting to the ccording to th t of registered
revenue from maintenance and service highly increased from 2018 due to revenue recognition of MA USO (Phase 1) since Q3/62 and maintenance service for MRT Blue Line Project. Selling and administrative
Investment Co., Ltd. 6. Yu Long 7. Hu Shake 8. Hiang Yunjian 9. Tang Fang 10. Hong Fang 11. Huang Yi 12. Luo Yuxuan 13. Zhang Ruliang 14. Li Bo 15. Zhao Peng 16. Ma Dongjun 17. Song Chunxia 18. Li Junfeng 19
( Limited Partnership ) 5. Sichuan Rongchen Investment Co.,Ltd. 6. Yu Long 7. Hu Shake 8. Hiang Yunjian 9. Tang Fang 10. Hong Fang 11. Huang Yi 12. Luo Yuxuan 13. Zhang Ruliang 14. Li Bo 15. Zhao Peng 16. Ma
administrative expenses of 7.98 million Baht, mainly due to decrease of the sales promotion expense. NQL121K:」:L■nd_1:盤:重導:と0脅 [ma基ユユ Fo「 the three―Inonth period ended 31 March 2020,the(3ornpany's'ヾ et ProltヽA/aS
compared with the same quarter last year was due to the expedited delivery of projects such as USO (Phase 2), Cable Landing Station and CAT-IDC, together with the revenue recognition of MA USO (Phase 1