Boğaz'da sektirmek: Ultra yüksek frekansta sıçrama sonrası getiriler

This study rigorously investigates intraday jumps in highly liquid stocks listed on Borsa Istanbul (BIST) using two common jump test methods and ultra-high frequency data. Additionally, three purely price-based jump methods, referred to as Price Skipping, were developed to improve jump detection accuracy. The findings reveal the presence of reversal post-jump returns, irrespective of the jump direction. A profitable trading strategy was established, exploiting this market behavior by taking long positions after down jumps and short positions after up jumps. The strategy's performance was compared across different jump detection methods and confidence intervals. Logistic regression analyses demonstrate a significant negative correlation between relative tick size and jump occurrence. Additional analyses using Ordinary Least Squares (OLS) and Locally Estimated Scatterplot Smoothing (LOESS) consider factors such as relative tick size, volume, pre-jump returns, sector affiliation, jump timing, index jumps, and alternative jump detection methods. Importantly, a positive correlation was discovered between relative tick size and the magnitude of reversal post-jump returns. Another significant finding suggests a positive correlation between trading volume during jumps and the magnitude of reversal post-jump returns. These results indicate that high volumes, potentially resulting from large market orders, induce stock price jumps involving multiple ticks, and when the relative tick size is large, these movements trigger an overreaction, subsequently leading to a reversal within a defined time period. These findings suggest that the tick size is excessive for the small priced stocks and suboptimal for the middle range. Therefore, it is recommended that Borsa Istanbul's management consider revising their tick size policy to enhance market liquidity, considering the implications of this study.