Does the Inclusion of Indonesian Firms in a Sustainable and Responsible Investment Index Affect Stock Performance?
This study empirically investigates the effect of the addition of Indonesian ﬁrms in the sustainable and responsible investment index (SRI-KEHATI index) on stock performance. This study applies an event study methodology using a single index model. The empirical results reveal that there are two days with signiﬁcant abnormal returns, namely d+1 and d+3. This ﬁnding implies that the Indonesian stock market is efﬁcient in a semi-strong form. This study also ﬁnds that there is no difference in abnormal returns before and after the SKI announcement. The implication of this study is the investors do not have to consider their investment decisions based on the inclusion of a corporation in the SKI.
 A.H.Zulkaﬂi,Z.Ahmad,andE.E.M,“TheperformanceofsociallyresponsibleinvestmentsinIndonesia: A study of the Sri Kehati Index (SKI),” Gadjah Mada Int. J. Bus., vol. 19, no. 1, pp. 59–76, 2017.
 E. Van Duuren, A. Plantinga, and B. Scholtens, “ESG integration and the investment management process: Fundamental investing reinvented,” J. Bus. Ethics, vol. 138, no. 3, pp. 525–533, 2015.
 M.M.CurranandD.Moran,“ImpactoftheFTSE4GoodIndexonﬁrmprice:Aneventstudy,”J. Environ. Manage., vol. 82, no. 4, pp. 529–537, 2007.
 J. P. Doh, S. D. Howton, S. W. Howton, and D. S. Siegel, “Does the market respond to an endorsement ofsocial responsibility?The roleofinstitutions,information,and legitimacy,” J. Manage.,vol.36,no.6, pp. 1461–1485, 2010.
 A. W. K. Cheung, “Do stock investors value corporate sustainability? Evidence from an event study,” J. Bus. Ethics, vol. 99, no. 2, pp. 145–165, 2011.
 U. Oberndorfer, P. Schmidt, M. Wagner, and A. Ziegler, “Does the stock market value the inclusion in a sustainability stock index? An event study analysis for German ﬁrms,” J. Environ. Econ. Manage., vol. 66, no. 3, pp. 1–13, 2013.
 G.Heal,“Corporate social responsibility:An economic and ﬁnancial framework,” Geneva Pap.,vol.30, no. 3, pp. 387–409, 2005.
 H. W. Kot, H. K. M. Leung, and G. Y. N. Tang, “The long-term performance of index additions and deletions: Evidence from the Hang Seng Index,” Int. Rev. Financ. Anal., vol. 42, no. 1, pp. 407–420, 2015.
 F. L. Elad, “Event study on the reaction of stock returns to acquisition news,” Int. Financ. Bank., vol. 4, no. 1, pp. 33–43, 2017.
 U. Mardiyati, S. Haryanto, and A. D. Buchdadi, “Analyzing abnormal return before and after the announcement of merger and acquisition in 2018,” J. Bus. Behav. Entrep., vol. 2, no. 1, pp. 9–17, 2018.
 S. P. Kothari and J. B. Warner, “Econometrics of event studies,” in Handbook of Corporate Finance: Empirical Corporate Finance Volume 1, 2006, pp. 3–36.
 N.Sorokina,D.E.Booth,andJ.H.Thornton,“Robustmethodsineventstudies:Empiricalevidenceand theoretical implications,” J. Data Sci., vol. 11, no. 1, pp. 575–606, 2013.
 B. Sutrisno and R. Nasri, “Is more always better? An empirical investigation of the CAPM and the Fama-French three-factor model in Indonesia,” in International Conference on Economics, Business and Economic Education 2018, KnE Social Sciences, 2018, vol. 2018, pp. 454–468.
 M.M.Carhart,“Onpersistenceinmutualfundperformance,” J. Finance,vol.52,no.1,pp.57–82,1997.
 E.F.FamaandK.R.French,“Aﬁve-factorassetpricingmodel,”J. ﬁnanc. econ.,vol.116,no.1,pp.1–22, 2015.