Overconfidence and Trading Decisions of Novice Investors: A Mediation Analysis of Risk Propensity and the Moderating Role of Financial Literacy

Eureka Try Zarazwanty R. Laega, Alifia Ainun Rizky, Arsianita Nur Fattah, Zulfahmi Zulfahmi, Andhi Febisatria

Abstract


This study investigates the psychological mechanisms underlying trading decisions among novice investors in Indonesia. Drawing upon behavioral finance and Prospect Theory, the research examines the effect of overconfidence on trading decisions, incorporating risk propensity as a mediating variable and financial literacy as a moderating variable. A quantitative explanatory approach was employed using primary data collected through an online survey of 220 novice investors with less than two years of investment experience. The data were analyzed using Partial Least Squares Structural Equation Modeling (PLS-SEM) to test both direct and indirect relationships. The findings reveal that overconfidence has a positive and significant effect on trading decisions. Overconfidence also significantly increases risk propensity, which in turn positively influences trading decisions, indicating partial mediation. Furthermore, financial literacy weakens the positive relationship between overconfidence and trading decisions, suggesting that higher financial knowledge functions as a partial buffer against cognitive bias. This study contributes to the behavioral finance literature by clarifying how cognitive bias translates into actual trading behavior within an emerging market context. The results highlight the importance of strengthening financial literacy and behavioral awareness to improve the quality of investment decision-making among retail investors.


Keywords


Overconfidence; Risk propensity; Financial literacy; Trading Decisions; Novice Investors; Behavioral Finance;

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References


Addo, J. O. (2025). Behavioral risk management in investment strategies. Finance, 3(1), 1–15.

Aljughaiman, A. A. (2022). Do investor overconfidence and loss aversion drive investment choices? Sustainability, 14(3), 1342–1356.

Barber, B. M., & Odean, T. (2001). Boys will be boys: Gender, overconfidence, and common stock investment. Quarterly Journal of Economics, 116(1), 261–292.

Bouteska, A. (2023). Revisiting overconfidence in investment decision-making. Research in International Business and Finance, 66, 102028.

Broekema, S. P. M. (2021). Overconfidence, financial advice seeking and household portfolio choices. Journal of Risk and Financial Management, 14(8), 345.

Chalissery, N. (2023). Does trading experience reduce biased judgment? Journal of Risk and Financial Management, 16(2), 95.

Chhatwani, M., & Parija, A. K. (2023). Who invests in cryptocurrency? The role of overconfidence among American investors. Journal of Behavioral and Experimental Economics, 107, 102107.

Chin, W. W. (1998). The partial least squares approach to structural equation modeling. In G. A. Marcoulides (Ed.), Modern methods for business research (pp. 295–336). Lawrence Erlbaum Associates.

Fornell, C., & Larcker, D. F. (1981). Evaluating structural equation models with unobservable variables and measurement error. Journal of Marketing Research, 18(1), 39–50.

Garay, U. (2021). The performance of retail investors and trading intensity. Finance Research Letters, 42, 101932.

Hair, J. F., Hult, G. T. M., Ringle, C. M., & Sarstedt, M. (2021). A primer on partial least squares structural equation modeling (PLS-SEM) (3rd ed.). Sage Publications.

Huang, J., Wang, Y., Fan, Y., & Li, H. (2022). Gauging the effect of investor overconfidence on trading volume from the perspective of the relationship between lagged stock returns and current trading volume. International Finance, 25(1), 103–123.

Indonesia Stock Exchange (IDX). (2025). Indonesian capital market statistics 2025. https://www.idx.co.id

Inghelbrecht, K., & Tedde, M. (2024). Overconfidence, financial literacy and excessive trading. Journal of Economic Behavior & Organization, 219, 152–195.

Kahneman, D., & Tversky, A. (1974). Judgment under uncertainty: Heuristics and biases. Science, 185(4157), 1124–1131.

Kahneman, D., & Tversky, A. (1979). Prospect theory: An analysis of decision under risk. Econometrica, 47(2), 263–291.

Kustodian Sentral Efek Indonesia (KSEI). (2025). Statistik pasar modal Indonesia 2025. https://www.ksei.co.id

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: Evidence from Pakistan. Acta Psychologica, 247, 104303.

Nunnally, J. C. (1978). Psychometric theory (2nd ed.). McGraw-Hill.

Otoritas Jasa Keuangan (OJK). (2025). Laporan statistik pasar modal 2025. https://www.ojk.go.id

Pham, Q. (2025). Revisiting the role of investor sentiment in the stock market. Journal of Behavioral Finance, 26(1), 1–15.

Rabbani, M. R. (2024). Does an overconfidence bias affect stock return, trading, and liquidity? Cogent Economics & Finance, 12(1), 2314567.

Shefrin, H. (2007). Behavioral corporate finance: Decisions that create value. McGraw-Hill.

Sukmadilaga, C., Fitri, A. N., & Ghani, E. K. (2023). Do foreign investment flow and overconfidence influence stock price movement? A comparative analysis before and after the COVID-19 lockdown. Journal of Risk and Financial Management, 16(1), 5.

Thaler, R. H. (1999). Mental accounting matters. Journal of Behavioral Decision Making, 12(3), 183–206.

ul Abdin, S. Z., Qureshi, F., Iqbal, J., & Sultana, S. (2022). Overconfidence bias and investment performance: A mediating effect of risk propensity. Borsa Istanbul Review, 22(4), 780–793.




DOI: http://dx.doi.org/10.58258/bisnis.v5i1.10388

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Ciptaan disebarluaskan di bawah Lisensi Creative Commons Atribusi-BerbagiSerupa 4.0 Internasional.

Bussiness Management
p-ISSN: 2828-8203, e-ISSN: 2828-7606
Jurnal ini diterbitkan oleh Lembaga Penelitian dan Pendidikan (LPP) Mandala.

Alamat: Jl. Lingkar Selatan, Perum Elit kota Mataram Asri Blok O. No. 35, Jempong Baru, Sekarbela, Kota Mataram NTB. Indonesia