Long-term correlations and multifractal nature in the intertrade durations of a liquid Chinese stock and its warrant

► We study comparatively the intertrade durations of a stock and its warrant. ► The scaled duration distributions have shifted power-law forms but do not collapse. ► The 1 min intertrade durations of the two equities are strongly correlated. ► The 1 min intertrade durations possess multifractal nature.