return interval meaning in Chinese

回程时间
回复时间
回描间歇
逆程时间

In order to make up the capm model , a test of the conditional capm using the garch - m framework is conducted and existing research is extended by investigating the effect of intervals by conducting tests over different sampling frequencies . not only the garch - m model but also the conditional capm are supported for daily and weekly return intervals while greater support for the model is found in the daily return intervals
针对capm模型的不足之处，进一步应用garch - m框架下的ccapm模型进行实证研究，并通过日收益率和周收益率数据研究不同的抽样区间对模型验证的影响，得出沪市日收益率数据和周收益率数据都支持garch - m模型和ccapm模型，尤以日收益率数据显著支持的结论。