Round‐Number Biases on Trading Time: Evidence from International Markets

In this article I investigate whether the round‐number heuristic affects investors' selection of trading time in the international market. I document the existence of round‐time biases, as evidenced by trading activities intensifying at second 0 of 1 min. Further examination suggests that the round‐time anomaly is likely driven by algorithmic trading from institutional investors. Consistent with this inference, I demonstrate that round‐time transactions carry value‐relevant information, have the predictive power for intraday‐level returns, and yield the positive daily trading revenue.