TY - JOUR T1 - Unveiling the Pricing Anomaly: A Detailed Examination of Initial Public Offerings in Borsa Istanbul in 2023 AU - Özyeşil, Mustafa AU - Tembelo, Havane PY - 2025 DA - July Y2 - 2025 DO - 10.26650/ISTJECON2024-1499157 JF - İstanbul İktisat Dergisi PB - İstanbul Üniversitesi WT - DergiPark SN - 2602-4152 SP - 97 EP - 116 VL - 75 IS - 1 LA - en AB - This study investigates the short-term pricing anomalies observed in the initial public offerings in Borsa Istanbul during 2023. The raw returns of 39 newly listed firms were initially calculated and benchmarked against the Borsa Istanbul-100 index. To determine abnormal returns, these raw returns were adjusted for market performance over periods of one, three, and seven days post-offering. The statistical significance of these abnormal returns was evaluated using t-statistics at a 5% significance level. The results demonstrate statistically significant pricing anomalies, thereby challenging the market efficiency hypothesis. The presence of these anomalies shows that market participants do not immediately incorporate all available information into IPO pricing. This research contributes to the literature by highlighting the unique dynamics of an emerging market and provides empirical evidence of persistent short-term anomalies in initial public offering pricing in Borsa Istanbul. It underscores the need for enhanced regulatory frameworks to improve market efficiency and offers strategic insights for investors navigating the Turkish IPO market.JEL Classification : G12 , G14 , G32 KW - IPO KW - Pricing anomalies KW - Short-term analysis KW - Borsa Istanbul Stock Exchange KW - Abnormal returns CR - AggarwaL, R., LeaL, R., & Hernandez, L. (1993). The aftermarket performance of initial public offerings in Latin America. Financial Management, 22(1), 42-53. https://doi.org/l0.2307/3665964 google scholar CR - AkYoL, A. C., Cooper, T., & Mohapatra, S. (2005). 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