Instagram Endorsement and Stock Return

Bagas Tri Erianto; Ani Wilujeng Suryani

doi:10.26675/jabe.v8i1.39218

Instagram Endorsement and Stock Return

Bagas Tri Erianto, Ani Wilujeng Suryani

Abstract

Investors obtain information from various sources, including social media, which can make them act irrationally by imitating the decisions of others. This study aims to investigate the impact of influencers endorsements on abnormal stock returns. This event study used 291 Instagram posts by social media influencers. Using Generalized Least Square (GLS), this study demonstrates that endorsement positively affects stock abnormal returns. The endorsement effect appears prior to the post and stops following the endorsement. Endorse was successful in creating a favorable sentiment, so that other investors are interested in making similar decisions to generate abnormal returns. This study shows the short-term effect of endorsements. Therefore, investors need to be aware and make rational decisions.

Keywords

Abnormal Returns; SocialMedia; Endorsements; Stocks; Instagram

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References

Agrawal, J. and Kamakura, WA (1995) 'The Economic Worth of Celebrity Endorsers: An Event Study Analysis', Journal of Marketing, 59(3), pp. 56–62. doi:10.2307/1252119.

Ah Mand, A. and Alam, I. (2021) 'Static and regime-dependent herding behavior: An emerging market case study', Journal of Behavioral and Experimental Finance, 29(6), pp. 1–12. doi:10.1016/j.jbef.2021.100466.

Ahsan, AFMM and Sarkar, AH (2013) 'Herding in Dhaka Stock Exchange', Journal of Applied Business and Economics, 14(2), pp. 11–19.

Ajjoub, C., Walker, T. and Zhao, Y. (2021) 'Social Media Posts and Stock Returns: The Trump Factor', International Journal of Managerial Finance, 17(2), pp. 185–213. doi:10.1108/IJMF-02-2020-0068.

Al-Shattarat, WK, Atmeh, MA and Al-Shattarat, BK (2013) 'Dividend Signaling Hypothesis in Emerging Markets: More Empirical Evidence', Journal of Applied Business Research, 29(2), pp. 461–468. doi:10.19030/jabr. v29i2.7650.

Annur, CM (2020) How old are the majority of social media users in Indonesia?, katadata.co.id. Available at: https://databoks.katadata.co.id/datapublish/2020/11/23/berapa-usia-mayoritas-pengguna-media-social-di-indonesia (Accessed: 12 May 2022).

Archana, S., Safeer, M. and Kevin, DS (2014) 'A Study on Market Anomalies in Indian Stock Market', International Journal of Business and Administration Research Review, 1(3), pp. 128–137.

Arias, J. and Mendez, CE (2021) 'COVID-19 Effect on Herding Behavior in European Capital Markets', Finance Research Letters, 38(7), pp. 1–15. doi:10.1016/j.frl.2020.101787.

Balcilar, M., Demirer, R. and Hammoudeh, S. (2013) 'Investor Herds and Regime-Switching: Evidence from Gulf Arab Stock Markets', Journal of International Financial Markets, Institutions and Money, 23, pp. 295–321. doi:10.1016/j.intfin.2012.09.007.

Banerjee, A. V (1992) 'A Simple Model of Herd Behavior', The Quarterly of Economics, 107(3), pp. 797–817. doi:https://doi.org/10.2307/2118364.

IDX (2022) Share List, idx.co.id. Available at: https://www.idx.co.id/id-id/data-pasar/data-saham/ register-saham/ (Accessed: 25 July 2022).

Bhattacharya, U. et al. (2009) 'The Role of the Media in the Internet IPO Bubble', Journal of Financial and Quantitative Analysis, 44(3), pp. 657–682. doi:10.1017/S0022109009990056.

Binder, JJ (1998) 'The Event Study Methodology Since 1969', Review of Quantitative Finance and Accounting, 11(2), pp. 111–137. doi:10.1023/A:1008295500105.

Born, JA, Myers, DH and Clark, WJ (2017) 'Trump Tweets and the Efficient Market Hypothesis', Algorithmic Finance, 6(4), pp. 103–109. doi:10.3233/AF-170211.

Burla, L. et al. (2008) 'From Text to Codings: Intercoder Reliability Assessment in Qualitative Content Analysis', Nursing Research, 57(2), pp. 113–117. doi:10.1097/01.NNR.0000313482.33917.7d.

Carrillo, JD and Brocas, I. (2000) 'The Value of Information When Preferences are Dynamically Inconsistent', European Economic Review, 44(6), pp. 1104–1115. doi:10.1016/S0014-2921(99)00062-8.

Chiang, TC and Zheng, D. (2010) 'An Empirical Analysis of Herd Behavior in Global Stock Markets', Journal of Banking and Finance, 34(8), pp. 1911–1921. doi:10.1016/j.jbankfin.2009.12.014.

Dang, HV and Lin, M. (2016) 'Herd Mentality in The Stock Market: On The Role of Idiosyncratic Participants with Heterogeneous Information', International Review of Financial Analysis, 48, pp. 1–14. doi:10.1016/j.irfa.2016.10.005.

Dougal, C. et al. (2012) 'Journalists and the Stock Market', Review of Financial Studies, 25(3), pp. 640–679. doi:10.1093/rfs/hhr133.

Fama, EF (1970) 'Efficient Capital Markets : A Review of Theory and Empirical Work', The Journal of Finance, 25(2), pp. 383–417. doi:10.2307/2325486.

Fenn, EA (2019) 'Using Social Media Analytics: The Effect of President Trump's Tweets on Companies' Stock Performance', Journal of Accounting and Management Information Systems, 17(1), pp. 1–20. doi:10.24818/jamis.2018.01005.

Froot, KA (1989) 'Consistent Covariance Matrix Estimation with Cross-Sectional Dependence and Heteroskedasticity in Financial Data', The Journal of Financial and Quantitative Analysis, 24(3), pp. 333–355. doi:10.2307/2330815.

Fuad, H. (2021) IDX has warned 13 issuers about endorsing public figure shares, IDX Channel. Available at: https://www.idxchannel.com/market-news/bei-telah-peringurkan-13-emiten-soal-endorse-saham-public-figure (Accessed: 1 January 2022).

Galariotis, EC, Krokida, S. and Spyrou, SI (2016) 'Herd Behavior and Equity Market Liquidity: Evidence from Major Markets', International Review of Financial Analysis, 48, pp. 1–41. doi:10.1016/j.irfa.2016.09.013.

Graham, JR (1999) 'Herding Among Investment Newsletters: Theory and Evidence', The Journal of Finance, 54(1), pp. 237–268. doi:10.1111/0022-1082.00103.

Gu, C. and Kurov, A. (2020) 'Informational role of social media: Evidence from Twitter sentiment', Journal of Banking and Finance, 121(1), pp. 1–13. doi:10.1016/j.jbankfin.2020.105969.

Guilmi, C. di, He, XZ and Li, K. (2014) 'Herding, Trend Chasing and Market Volatility', Journal of Economic Dynamics and Control, 48, pp. 349–373. doi:10.1016/j.jedc.2014.07.008.

Gurdgiev, C. and O'Loughlin, D. (2020) 'Herding and Anchoring in Cryptocurrency Markets: Investor Reaction to Fear and Uncertainty', Journal of Behavioral and Experimental Finance, 25(100271), pp. 1–10. doi:10.1016/j.jbef.2020.100271.

Haggard, KS, Jones, JS and Witte, HD (2015) 'Black Cats or Black Swans? Outliers, Seasonality in Return Distribution Properties, and the Halloween Effect', Managerial Finance, 41(7), pp. 642–657. doi:10.1108/MF-07-2014-0190.

Hair, JF et al. (2019) Multivariate Data Analysis. 8th edn, Cengage Learning. 8th edn. Edited by A. Ainscow. Andover, United Kingdom: Pearson Education, Inc.

Han, X., Li, K. and Li, Y. (2020) 'Investor Overconfidence and the Security Market Line: New Evidence from China', Journal of Economic Dynamics and Control, 117(1), pp. 1–28. doi:10.1016/j.jedc.2020.103961.

Hartono, J. (2009) Portfolio Theory and Investment Analysis. 5th edn. Yogyakarta.

Helanda, AP and Suryani, AW (2020) 'The Phenomenon of the Month of Sela in the Indonesian Capital Market', AKRUAL: Journal of Accounting, 12(1), pp. 65–79. doi:10.26740/jaj.v12n1.p65-79.

Henderson, GV (1990) 'Problems and Solutions in Conducting Event Studies', The Journal of Risk and Insurance, 57(2), pp. 282–306. doi:10.2307/253304.

Hirshleifer, D. et al. (2004) 'Do Investors Overvalue Firms with Bloated Balance Sheets?', Journal of Accounting and Economics, 38, pp. 297–331. doi:10.1016/j.jacceco.2004.10.002.

Hwang, S. and Salmon, M. (2004) 'Market Stress and Herding', Journal of Empirical Finance, 11(4), pp. 585–616. doi:10.1016/j.jempfin.2004.04.003.

Indariyah, P. (2016) Analysis of Differences in Abnormal Return and Liquidity of Stock Trading in Companies Carrying Out Stock Split and Reverse Stock Split on the IDX in 2010-2014. University of Jember.

Jannah, SM (2021) The Danger of 'Endorse' Shares by Celebrities ala Raffi Ahmad & Ari Lasso, tirto.id. Available at: https://tirto.id/bahaya-endorse-saham-oleh-selebritas-ala-raffi-ahmad-ari-lasso-f8Uj.

Jin, SV, Muqaddam, A. and Ryu, E. (2019) 'Instafamous and Social Media Influencer Marketing', Marketing Intelligence and Planning, 37(5), pp. 567–579. doi:10.1108/MIP-09-2018-0375.

KSEI (2021a) Statistics of the Indonesian Capital Market, Indonesian Central Securities Depository. Available at: https://www.ksei.co.id/files/Statistik_Publik_Desember_2021.pdf.

KSEI (2021b) Closes 2021 with Optimism for a Better Indonesian Capital Market, KSEI. Available at: https://www.ksei.co.id/files/uploads/press_releases/press_file/id-id/203_berita_pers_ Tutup_tahun_2021_dengan_optimism_pasar_modal_indonesia_lebih_baik_20211230130225.pdf (Accessed: 14 February 2022).

Kumar, MS and Persaud, A. (2002) 'Pure Contagion and Investors' Shifting Risk Appetite: Analytical Issues and Imperial Evidence', International Finance, 5(3), pp. 401–436. doi:10.1111/1468-2362.00102.

Kusnandar, DL and Bintari, VI (2020) 'Comparison of Abnormal Stock Returns Before and After Changes in Trading Time During the Covid-19 Pandemic', Journal of Capital Markets and Business, 2(2), pp. 195–202. doi:10.37194/jpmb.v2i2.49.

Latif, M. et al. (2011) 'Market Efficiency, Market Anomalies, Causes, Evidence, and Some Behavioral Aspects of Market Anomalies', Research Journal of Finance and Accounting, 2(9), pp. 1–13.

Lo, AW and Repin, DV (2001) The Psychophysiology of Real-Time Risk Processing, National Bureau of Economic Research. 8508.Cambridge. doi:10.3386/w8508.

Mahardika, LA (2022) Indonesian Capital Market Investors Reach 8.3 Million People, bussiness.com. Available at: https://market.business.com/read/20220415/7/1523225/investor-pasar-modal-indonesia-tembus-83-juta-orang (Accessed: 24 July 2022).

Maiorescu, RD (2017) 'Using Online Platforms to Engage Employees in Unionism. The Case of IBM', Public Relations Review, 43(5), pp. 1–6. doi:10.1016/j.pubrev.2017.07.002.

Manson, M. (2019) 88% of Investors Make Decisions Based on Information from Digital Sources, Brunswick Group. Available at: https://www.brunswickgroup.com/digital-investor-survey-c-suite-use-social-media-to-keep-investors-close-i9475/ (Accessed: 13 October 2021).

Minenna, M. (2003) 'Insider Trading, Abnormal Return and Preferential Information: Supervising Through a Probabilistic Model', Journal of Banking & Finance, 27(1), pp. 59–86. doi:1016/S0378-4266(01)00209-6.

Nofsinger, JR and Sias, RW (1999) 'Herding and Feedback Trading by Institutional and Individual Investors', The Journal of Finance, 54(6), pp. 2263–2295. doi:10.1111/0022-1082.00188.

Nurheriyani, A. (2014) 'Analysis of Trading Volume and Abnormal Stock Returns before and after the Inauguration of the President and Vice President', Journal of Economics and Entrepreneurship, 15, pp. 167–172.

Financial Services Authority (2021) Indonesian National Financial Literacy Strategy (SNLKI) 2021 - 2025, www.ojk.go.id. Available at: https://www.ojk.go.id/id/berita-dan-activity/publikasi/Pages/Strategi-Nasional-Literasi-Keuangan-Indonesia-2021-2025.aspx (Accessed: 5 March 2022).

Peng, L. and Xiong, W. (2006) 'Investor Attention, Overconfidence and Category Learning', Journal of Financial Economics, 80(3), pp. 563–602. doi:10.1016/j.jfineco.2005.05.003.

Peters, E. and Slovic, P. (2000) 'The Springs of Action: Affective and Analytical Information Processing in Choice', Personality and Social Psychology Bulletin, 26(12), pp. 1465–1475. doi:10.1177/01461672002612002.

Purwanti, T. (2022) These Sectoral Stocks are Favorite Investments for Young People, CNBC. Available at: https://www.cnbcindonesia.com/market/20220414133554-17-331731/ini-saham-sectoral-yang-jadi-favorit-investasi-anak-muda (Accessed: 10 August 2022).

Qian, W., Suryani, AW and Xing, K. (2020) 'Does Carbon Performance Matter to Market Returns During Climate Policy Changes? Evidence from Australia', Journal of Cleaner Production, 259(121040), pp. 1–10. doi:10.1016/j.jclepro.2020.121040.

Republic of Indonesia (1995) 'Law of the Republic of Indonesia Number 8 of 1995 Concerning Capital Markets'.

Ricciardi, V. and Simon, HK (2000) 'What is Behavioral Finance?', Business, Education and Technology Journal Fall, 2(2), pp. 1–9. doi:10.1002/9780470404324.hof002009.

Ritter, JR (2003) 'Behavioral Finance', Pacific Basin Finance Journal, 11(4), pp. 429–437. doi:10.1016/S0927-538X(03)00048-9.

Riyanto, GP (2021) Number of Active Monthly Instagram Users Reaches 2 Billion?, Kompas. Available at: https://tekno.kompas.com/read/2021/12/15/12030047/nomor-pengguna-aktif-bulanan-instagram-reach-2-miliar-?page=all (Accessed: 8 October 2021) .

Septyanto, D. (2013) 'Factors Influencing Individual Investors in Making Securities Investment Decisions on the Indonesia Stock Exchange (IDX)', Journal of Economics, 4(2), pp. 90–101.

Sibande, X. et al. (2021) 'Investor Sentiment and (Anti) Herding in the Currency Market: Evidence from Twitter Feed Data', Journal of Behavioral Finance, pp. 1–17. doi:10.1080/15427560.2021.1917579.

Singh, JE, Babshetti, V. and Shivaprasad, HN (2021) Efficient Market Hypothesis to Behavioral Finance : A Review of Rationality to Irrationality, Materials Today: Proceedings. Elsevier Ltd. doi:10.1016/j.matpr.2021.03.318.

Soufian, M., Forbes, W. and Hudson, R. (2013) 'Adapting Financial Rationality: Is a New Paradigm Emerging?', Critical Perspectives on Accounting, 25(8), pp. 1–19. doi:10.1016/j.cpa.2013.08.009.

Sprenger, TO et al. (2014) 'News or Noise? Using Twitter to Identify and Understand Company-Specific News Flow', Journal of Business Finance and Accounting, 41(7–8), pp. 791–830. doi:10.1111/jbfa.12086.

Sul, HK, Dennis, AR and Yuan, LI (2016) 'Trading on Twitter: Using Social Media Sentiment to Predict Stock Returns', Decision Sciences, 48(3), pp. 1–35. doi:10.1111/deci.12229.

Suryahadi, A. (2021) Technology Stocks Rise High in 2021, Here's the Prospects for 2022, Kontan.co.id. Available at: https://investasi.kontan.co.id/news/saham-technology-naik-tinggi-di-2021-begini-prospeknya-untuk-tahun-2022 (Accessed: 29 July 2022).

Swamy, V. and Dharani, M. (2019) 'Investors Attention Using the Google Search Volume Index-Impact on Stock Returns', Review of Behavioral Finance, 11(1), pp. 55–69. doi:10.1108/RBF-04-2018-0033.

Swank, OH and Visser, B. (2008) 'The Consequences of Endogenizing Information for the Performance of a Sequential Decision Procedure', Journal of Economic Behavior and Organization, 65(3–4), pp. 667–681. doi:10.1016/j.jebo.2005.11.003.

Tan, L. et al. (2008) 'Herding Behavior in Chinese Stock Markets: An Examination of A and B Shares', Pacific-Basin Finance Journal, 16(1–2), pp. 61–77. doi:10.1016/j.pacfin.2007.04.004.

Tanoyo, AA (2020) 'Analysis of the Effect of Stock Split on Trading Volume, Stock Prices, and Abnormal Returns in Companies Listed on the IDX for the 2017-2018 Period', Journal of Business Management and Entrepreneurship, 4(1), pp. 84–90. doi: http://dx.doi.org/10.24912/jmbk.v4i1.6805.

Tetlock, PC (2007) 'Giving Content to Investor Sentiment: The Role of Media in the Stock Market', The Journal of Finance, 62(3), pp. 1139–1168. doi:10.1111/j.1540-6261.2007.01232.x.

Tian, X. et al. (2021) 'Herding behavior in Supplier Innovation Crowdfunding: Evidence From Kickstarter', International Journal of Production Economics, 239(4), pp. 1–14. doi:10.1016/j.ijpe.2021.108184.

Tuyon, J. and Ahmad, Z. (2016) 'Behavioural Finance Perspectives on Malaysian Stock Market Efficiency', Borsa Istanbul Review, 16(1), pp. 43–61. doi:10.1016/j.bir.2016.01.001.

Utami, DN (2021) Stimulus Fuels the Recovery of the Property Sector, bussiness.com. Available at: https://market.business.com/read/20210531/192/1399485/stimulus-jadi-bahan-bakar-pemulihan-sector-properti (Accessed: 29 July 2022).

Wang, G. and Wang, Y. (2018) 'Herding, Social Network and Volatility', Economic Modeling, 68, pp. 74–81. doi:10.1016/j.econmod.2017.04.018.

Werastuti, DNS (2012) 'Market Anomalies in Stock Returns: The Day of Week, Week Four Effect, Rogalsky Effect, and January Effect', Scientific Journal of Accounting and Humanics (JINAH), 2(1), pp. 1–18. doi: https://doi.org/10.23887/jinah.v2i1.550.

Wijayanti, RI (2022) What are ARA and ARB Shares?, IDX Channel. Available at: https://www.idxchannel.com/market-news/apa-itu-saham-ara-dan-arb-begini-penjuangan-lengkapnya (Accessed: 24 July 2022).

Zahera, SA and Bansal, R. (2018) 'Do Investors Exhibit Behavioral Biases in Investment Decision Making? A Systematic Review', Qualitative Research in Financial Markets, 10(2), pp. 210–251. doi:10.1108/QRFM-04-2017-0028.

DOI: http://dx.doi.org/10.26675/jabe.v8i1.39218