The probability of risk triggered by the impact between the prices of Chinese stock index futures and spots has been enhancing since CSI300 index futures were listed.Measuring the dependence,especially in extreme prices,scientifically between CSI300 index futures and spots is significantly important for tracking cross-market risk.Thus,under the intraday high-frequency data environment,the marginal distributions of CSI300 index futures and spots are fitted with realized bi-power volatility,and then the Clayt...