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A Continuous-Time Analysis of Momentum and Mean Reversion in the BIST100 Index

Cilt: 40 Sayı: 3 15 Temmuz 2026
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A Continuous-Time Analysis of Momentum and Mean Reversion in the BIST100 Index

Öz

This study investigates whether stock returns in the Turkish equity market display time-series momentum or mean-reverting behavior. Using a stochastic continuous-time modeling approach, the analysis incorporates a performance-based momentum component and a mean-reversion state driven by the dividend yield. The model is estimated with monthly BIST100 data from 2000 to 2025 in both Turkish lira (TRY) and U.S. dollars (USD). The results show no evidence of economically meaningful time-series momentum in either currency denomination. They also provide evidence consistent with mean-reverting behavior in both currency denominations, with faster adjustment toward equilibrium in TRY and slower, more persistent adjustment in USD, reflecting the influence of exchange rate movements. These findings highlight the importance of considering exchange rate effects when evaluating return predictability and investment decisions in emerging markets.

Anahtar Kelimeler

mean reversion, momentum, stock index

Kaynakça

  1. Antoniou, A., Lam, H. Y., & Paudyal, K. (2007). Profitability of momentum strategies in international markets: The role of business cycle variables and behavioural biases. Journal of Banking & Finance, 31(3), 955-972. [CrossRef]
  2. Arnott, R. D., Kalesnik, V., & Linnainmaa, J. T. (2023). Factor momentum. The Review of Financial Studies, 36(8), 3034-3070. [CrossRef]
  3. Balakrishnan, A. (2016). Size, value, and momentum effects in stock returns: Evidence from India. Vision, 20(1), 1-8. [CrossRef]
  4. Balı, S. (2010). İMKB’de Zıtlık ve Momentum Stratejileri. İstanbul: Titiz Yayınları.
  5. Balvers, R., Wu, Y., & Gilliland, E. (2000). Mean reversion across national stock markets and parametric contrarian investment strategies. The Journal of Finance, 55(2), 745-772. [CrossRef]
  6. Balvers, R. J., & Wu, Y. (2006). Momentum and mean reversion across national equity markets. Journal of Empirical Finance, 13(1), 24-48. [CrossRef]
  7. Barak, O. (2008). İMKB’de aşırı reaksiyon anomalisi ve davranışsal finans modelleri kapsamında değerlendirilmesi. Gazi Üniversitesi İktisadi ve İdari Bilimler Fakültesi Dergisi, 10(1), 207-229.
  8. Bhattacharya, D., Li, W. H., & Sonaer, G. (2017). Has momentum lost its momentum?. Review of Quantitative Finance and Accounting, 48(1), 191-218. [CrossRef]
  9. Bildik, R., & Gülay, G. (2007). Profitability of contrarian strategies: Evidence from the Istanbul stock exchange. International Review of Finance, 7(1‐2), 61-87. [CrossRef]
  10. Bloomberg. (2021, June). Bloomberg U.S. domestic equity indices methodology. [CrossRef]

Kaynak Göster

APA
Yerli, Ç. (2026). A Continuous-Time Analysis of Momentum and Mean Reversion in the BIST100 Index. Trends in Business and Economics, 40(3), 551-564. https://doi.org/10.16951/trendbusecon.1815580
AMA
1.Yerli Ç. A Continuous-Time Analysis of Momentum and Mean Reversion in the BIST100 Index. Trend Bus Econ. 2026;40(3):551-564. doi:10.16951/trendbusecon.1815580
Chicago
Yerli, Çiğdem. 2026. “A Continuous-Time Analysis of Momentum and Mean Reversion in the BIST100 Index”. Trends in Business and Economics 40 (3): 551-64. https://doi.org/10.16951/trendbusecon.1815580.
EndNote
Yerli Ç (01 Temmuz 2026) A Continuous-Time Analysis of Momentum and Mean Reversion in the BIST100 Index. Trends in Business and Economics 40 3 551–564.
IEEE
[1]Ç. Yerli, “A Continuous-Time Analysis of Momentum and Mean Reversion in the BIST100 Index”, Trend Bus Econ, c. 40, sy 3, ss. 551–564, Tem. 2026, doi: 10.16951/trendbusecon.1815580.
ISNAD
Yerli, Çiğdem. “A Continuous-Time Analysis of Momentum and Mean Reversion in the BIST100 Index”. Trends in Business and Economics 40/3 (01 Temmuz 2026): 551-564. https://doi.org/10.16951/trendbusecon.1815580.
JAMA
1.Yerli Ç. A Continuous-Time Analysis of Momentum and Mean Reversion in the BIST100 Index. Trend Bus Econ. 2026;40:551–564.
MLA
Yerli, Çiğdem. “A Continuous-Time Analysis of Momentum and Mean Reversion in the BIST100 Index”. Trends in Business and Economics, c. 40, sy 3, Temmuz 2026, ss. 551-64, doi:10.16951/trendbusecon.1815580.
Vancouver
1.Çiğdem Yerli. A Continuous-Time Analysis of Momentum and Mean Reversion in the BIST100 Index. Trend Bus Econ. 01 Temmuz 2026;40(3):551-64. doi:10.16951/trendbusecon.1815580