Antara Ego dan Bukti Sosial: Perspektif Keuangan Keperilakuan pada Keputusan Investasi di Galeri Investasi UNUSIDA
Between Ego and Social Proof: A Behavioral Finance Perspective on Investment Decisions at the UNUSIDA Investment Gallery
DOI:
https://doi.org/10.55732/Keywords:
Behavioral Finance, Overconfidence, Confirmation Bias, Herd Behavior, Keputusan Investasi, KSPM.Abstract
This study aims to empirically examine the influence of psychological biases specifically overconfidence, confirmation bias, and herd behavior on investment decision-making among young investors. The research focuses on students affiliated with the Capital Market Study Group (KSPM) at the Investment Gallery of Universitas Nahdlatul Ulama Sidoarjo (UNUSIDA). A causal quantitative approach was employed, with the population consisting of all KSPM members. Using a census (total sampling) technique, a sample of 32 students actively trading in the capital market was selected. Data were collected through structured questionnaires using Likert scales, which underwent rigorous validity and reliability testing. The data were subsequently analyzed using multiple linear regression analysis via statistical software.
The results indicate that all three variables were found to have a positive and significant impact on investment decisions. A key finding reveals that herd behavior is the most dominant factor in dictating student investment behavior, followed by overconfidence and confirmation bias. This suggests that despite possessing adequate theoretical financial literacy through KSPM, social pressure and excessive self-belief remains the primary drivers in investment execution. The implications of this research suggest the necessity of integrating an investment psychology curriculum within Investment Galleries to mitigate the impact of cognitive biases and foster more rational and resilient young investors.
References
Aditya, R., & Nugraha, N. (2021). The influence of overconfidence and herding behavior on investment decisions during the COVID-19 pandemic. Journal of Behavioral Finance and Economics, 11(2), 45-60.
Fahmi, M., & Syarif, H. (2023). Psychological biases in Gen Z investors: A study on investment galleries in East Java. Indonesian Journal of Capital Market and Leverage, 5(1), 12-25.
Gumanti, T. S., & Nastiti, P. K. (2022). Behavioral finance in emerging markets: A comprehensive review of cognitive biases. International Journal of Finance and Banking Studies, 11(3), 88-102.
Hapsari, D., & Setiawan, B. (2024). The role of confirmation bias and social media echo chambers in retail investors' decision making. Journal of Financial Psychology, 9(1), 33-47.
KSEI. (2025). Statistik Pasar Modal Indonesia: Demografi Investor Domestik. Jakarta: PT Kustodian Sentral Efek Indonesia.
Lestari, W., & Putri, A. (2022). Overconfidence and loss aversion: Evidence from student investors in investment galleries. Journal of Accounting and Strategic Finance, 5(2), 110-125.
Mulyadi, A., & Herlambang, P. (2021). Herd behavior and FOMO phenomenon among young stock investors in Indonesia. Economic and Business Review, 18(4), 201-215.
Pradana, G. W., & Wijayanti, R. (2023). Analisis perilaku bias kognitif pada kelompok studi pasar modal di perguruan tinggi. Jurnal Riset Manajemen dan Bisnis, 8(2), 45-58.
Putra, I. G. S., & Rahmawati, L. (2024). Do education and experience mitigate behavioral biases? A study on KSPM members. Asian Journal of Financial Education, 3(1), 77-92.
Rahayu, S., & Santoso, T. (2022). Pengaruh bias konfirmasi dan heuristik terhadap keputusan investasi saham mahasiswa. Jurnal Keuangan dan Perbankan, 26(3), 560-575.
Sari, D. P., et al. (2022). Behavioral finance perspective: How overconfidence affects trading frequency among young investors. Journal of Contemporary Accounting, 4(1), 15-28.
Setiawan, M. R., & Arifin, Z. (2023). The interaction of financial literacy and psychological biases in investment decision making. Global Business and Economics Review, 28(2), 134-150.
Thaler, R. H. (2021). Nudge and Choice Architecture in Financial Markets. Yale University Press (Updated Edition).
Utami, P., & Kusuma, H. (2025). Digitalization and its impact on herd behavior among Gen Z investors in Sidoarjo. Journal of Indonesian Economy and Business, 40(1), 102-118.
Wardani, K., & Susanto, D. (2023). Examining the impact of overconfidence and risk perception on KSPM students' portfolios. Indonesian Financial Review, 7(2), 89-104.














