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Abstract

The increasing activity of stock investment among millennial investors is increasingly influenced by digital information and behavioral factors. This study aims to examine the effects of social media use, herding bias, and overconfidence on stock investment decisions and to investigate the mediating role of investment intention among millennial investors in West Kalimantan. A quantitative approach was employed involving 200 millennial investors selected through purposive sampling. Data were collected using a Likert-scale questionnaire and analyzed using Structural Equation Modeling–Partial Least Squares (SEM-PLS) with SmartPLS. The findings indicate that social media use and overconfidence have positive and significant effects on stock investment decisions, whereas herding bias has no significant effect. Furthermore, social media use and overconfidence significantly influence investment intention, while herding bias does not have a significant effect. Investment intention mediates the effects of social media use and overconfidence on stock investment decisions but does not mediate the effect of herding bias. These findings suggest that millennial investors stock investment decisions are more strongly associated with exposure to digital information, confidence in their own abilities, and the formation of investment intentions than with the tendency to follow other investors decisions.

Keywords

Social Media Herding Bias Overconfidence Investment Intention Investment Decision

How to Cite

Citation Format
Ardhionova, R. D. (2027). Pengaruh Penggunaan Media Sosial, Herding Bias, dan Overconfidence terhadap Keputusan Investasi Saham: Peran Mediasi Niat Investasi pada Investor Milenial di Kalimantan Barat. Jurnal EMT KITA, 11(1), 431-440. https://doi.org/10.35870/emt.v11i1.8210

References

36 References
  • Adielyani, D., & Mawardi, W. (2020). The influence of overconfidence, herding behavior, and risk tolerance on stock investment decisions: The empirical study of millennial investors in Semarang City. Jurnal Maksipreneur: Manajemen, Koperasi, Dan Entrepreneurship, 10(1), 89. https://doi.org/10.30588/jmp.v10i1.691.
  • Ajzen, I. (1991). The theory of planned behavior. Organizational Behavior and Human Decision Processes, 50(2), 179–211. https://doi.org/10.1016/0749-5978(91)90020-T.
  • Ali, M. H., Bakar, A., Tufail, M. S., & Mazhar, F. (2024). Behavioral biases in investment: Overconfidence, disposition effect, and herding behavior. IRASD Journal of Economics, 6(2), 555–566. https://doi.org/10.52131/joe.2024.0602.0223.
  • Arie Wibowo, M., Khusniyah Indrawati, N., & Aisjah, S. (2023). The impact of overconfidence and herding bias on stock investment decisions mediated by risk perception. International Journal of Research in Business and Social Science (2147-4478), 12(5), 174–184. https://doi.org/10.20525/ijrbs.v12i5.2663.
  • Armansyah, R. F. (2022). Herd instinct bias, emotional biases, and information processing biases in investment decisions. Jurnal Manajemen Dan Kewirausahaan, 24(2), 105–117. https://doi.org/10.9744/jmk.24.2.105-117.
  • Beni Sucipto, Saiful Aminudin Al Kusuma Putra, Nurianah, & Irea Arrahima. (2026). Analisis perilaku herding dan overconfidence dalam pengambilan keputusan investasi generasi Z Kabupaten Jombang di pasar saham syariah Indonesia. JMD: Jurnal Riset Manajemen & Bisnis Dewantara, 9(1), 43–56. https://doi.org/10.26533/jmd.v9i1.1547.
  • Bertuah, E., & Oppusunggu, H. D. H. (2022). Examining the effect of theory of planned behavior on individual investment intention in the Indonesia stock exchange, moderated by herding behavior and risk propensity. MIX: Jurnal Ilmiah Manajemen, 12(3), 399. https://doi.org/10.22441/jurnal_mix.2022.v12.i3.004.
  • Dewantari, F., & Sinarwati, N. K. (2022). Bias psikologi pada perilaku keuangan generasi milenial dalam berinvestasi di pasar modal. Sains: Jurnal Manajemen Dan Bisnis, 15(1), 105. https://doi.org/10.35448/jmb.v15i1.17404.
  • Fitri, F. A., & Hariyanto, D. (2024). The impact of social media, herding bias, gambler’s fallacy, and framing effect on investment decisions among Gen Z investors in Pontianak City. Proceedings Series on Social Sciences & Humanities, 15, 202–207. https://doi.org/10.30595/pssh.v15i.1007.
  • Hair, J. F., Risher, J. J., Sarstedt, M., & Ringle, C. M. (2019). When to use and how to report the results of PLS-SEM. European Business Review, 31(1), 2–24. https://doi.org/10.1108/EBR-11-2018-0203.
  • Halim, R., & Pamungkas, A. S. (2023). The influence of risk perception, overconfidence, and herding behavior on investment decision. International Journal of Application on Economics and Business, 1(1), 521–529. https://doi.org/10.24912/ijaeb.v1i1.521-529.
  • Hasanudin, H. (2023). The role of social media in influencing investment decisions in the millennial generation. Jurnal Multidisiplin Sahombu, 3(01), 124–130. https://doi.org/10.58471/jms.v3i01.1967.
  • Hidayati, N. Y., & Destiana, R. (2023). The influence of attitude, subjective norms, perceived behavioral control, and financial literacy on investment intention. Return: Study of Management, Economic and Business, 2(7), 718–728. https://doi.org/10.57096/return.v2i7.137.
  • Istichomah, N., & Setiyono, W. P. (2024). Social media, friendships, and financial literacy drive millennial investments. Academia Open, 9(2). https://doi.org/10.21070/acopen.9.2024.8123.
  • Lemiyana, L., Rusdi, M., & Al Maraghy, M. (2024). How do digital literacy affect millennial investment in sharia capital markets? The role of lifestyle. IKONOMIKA, 9(2), 247. https://doi.org/10.24042/ijebi.v9i2.23757.
  • Loppies, L. S., Maria J. F. Esomar, & Janah, I. N. (2022). Herding behavior, overconfidence, regret aversion bias on investment decisions. International Journal of Economics, Social Science, Entrepreneurship and Technology (IJESET), 1(5), 345–352. https://doi.org/10.55983/ijeset.v1i5.357.
  • Mahmood, F., Arshad, R., Khan, S., Afzal, A., & Bashir, M. (2024). Impact of behavioral biases on investment decisions and the moderation effect of financial literacy; an evidence of Pakistan. Acta Psychologica, 247, 104303. https://doi.org/10.1016/j.actpsy.2024.104303.
  • Mahyuni, L. P. (2022). Minat investasi generasi milenial di bursa efek Indonesia. Jurnal Ekonomi, Keuangan Dan Manajemen, 18(3), 425. https://doi.org/10.29264/jinv.v18i3.10344.
  • Manzoor, A., Jan, A., & Shafi, M. (2023). Behavioral finance - An emerging theory: A review study. Indian Journal of Research in Capital Markets, 10(1), 34. https://doi.org/10.17010/ijrcm/2023/v10i1/172802.
  • Natahadi, H., Makaryanawati, M., & Keliwon, K. B. (2024). Impact of influencer trustworthiness and financial literacy on herding behavior with risk perception mediating variables of Indonesian millennial investors. International Journal of Social Service and Research, 4(01), 15–30. https://doi.org/10.46799/ijssr.v4i01.648.
  • Nurhidayah, N. (2022). Social media, financial risk tolerance, and Indonesian millennial generation investor behavior. International Journal of Finance & Banking Studies (2147-4486), 11(4), 17–23. https://doi.org/10.20525/ijfbs.v11i4.1840.
  • Paul, H. I. S., & Sundaram, N. (2023). Behavioral biases and their influence on investment decision-making: A systematic literature review and future research agenda. Journal of Law and Sustainable Development, 11(4), e904. https://doi.org/10.55908/sdgs.v11i4.904.
  • Prayudi, R. M. N., & Purwanto, E. (2023). The impact of financial literacy, overconfidence bias, herding bias and loss aversion bias on investment decision. Indonesian Journal of Business Analytics, 3(5), 1873–1886. https://doi.org/10.55927/ijba.v3i5.5715.
  • Purwidianti, W., Rahmawati, I. Y., & Dwiyanti, R. (2023). Overconfidence and herding bias on investment decisions: The role of risk perception as a mediator. Asian Journal of Economics, Business and Accounting, 23(18), 36–45. https://doi.org/10.9734/ajeba/2023/v23i181056.
  • Redawati, R., & Rizani, F. (2023). Behavioral finance in investment: A systematic review. International Journal of Innovative Research in Multidisciplinary Education, 02(10). https://doi.org/10.58806/ijirme.2023.v2i10n07.
  • Robin, R., & Angelina, V. (2020). Analysis of the impact of anchoring, herding bias, overconfidence and ethical consideration towards investment decision. JIMFE (Jurnal Ilmiah Manajemen Fakultas Ekonomi), 6(2), Inpress. https://doi.org/10.34203/jimfe.v6i2.2558.
  • Safitri, N. A., & Wibowo, A. (2025). The influence of financial literacy, risk preferences, and social media influencers on investment interests of the millennial generation. Oikonomia: Jurnal Manajemen, 21(2), 109–124. https://doi.org/10.47313/oikonomia.v21i2.4027.
  • Safitri, N. W. N., Saputri, L. G. E. A., & Siagian, R. A. (2025). Investment decisions among millennials and generation Z: The role of education, financial literacy, and Instagram content. Jurnal Ilmiah Akuntansi Dan Bisnis, 10(1), 37–49. https://doi.org/10.38043/jiab.v10i1.6741.
  • Shahani, R., & Fayaz Ahmed, S. (2023). Psychological and social factors determining investment decisions in cryptocurrency: Exploring the mediating role of cognitive biases. Journal of Organisational Studies and Innovation, 9(4), 25–45. https://doi.org/10.51659/josi.22.159.
  • Sibarani, B. (2024). Herding behavior in financial market – Systematic literature review. JRMSI - Jurnal Riset Manajemen Sains Indonesia, 15(01), 33–45. https://doi.org/10.21009/JRMSI.015.1.04.
  • Suryani, W., Tobing, F., & Emelia Girsang, Y. (2022). Factor analysis of investment intention: Millennials and Gen Z perspective. Jurnal Inovasi Ekonomi, 7(01), 55–62. https://doi.org/10.22219/jiko.v7i01.20150.
  • Theressa, T. D., & Armansyah, R. F. (2022). Pengaruh herding, overconfidence, dan endowment bias pada keputusan investasi investor pasar modal. Journal of Business and Banking, 12(1), 35. https://doi.org/10.14414/jbb.v12i1.2989.
  • Wawrosz, P., & Schulz, B. (2023). Overconfidence, representativeness and herding bias among German investors: How demographic and other variables influence their decision. Ad Alta: Journal of Interdisciplinary Research, 13(2), 285–294. https://doi.org/10.33543/j.1302.285294.
  • Widyasari, A., & Aruan, D. (2022). The effect of social media information on intention to invest in Indonesia capital market: Case of generation Y. Proceedings of the 4th International Conference on Economics, Business and Economic Education Science, ICE-BEES 2021, 27-28 July 2021, Semarang, Indonesia. https://doi.org/10.4108/eai.27-7-2021.2316776.
  • Wisnu Saputra, G., & Maradona, A. F. (2023). The effect of herding behavior on millennial generation intentions in investing crypto assets. International Journal of Social Science and Business, 7(2), 326–334. https://doi.org/10.23887/ijssb.v7i2.55119.
  • Zahro, D. El, & Singgih, M. N. (2024). Pengaruh herding bias, overconfidence bias, dan cognitive dissonance bias terhadap keputusan investasi. Business Management Research, 3(2), 72–83. https://doi.org/10.26905/bismar.v3i2.13772.

Author Biography

Reyhan Davin Ardhionova, Tanjungpura University

Program Studi Manajemen, Universitas Tanjungpura, Kota Pontianak, Provinsi Kalimantan Barat, Indonesia.

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Copyright (c) 2027 Reyhan Davin Ardhionova

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