基金区间超额基准收益

获取基金不同区间的超额基准收益率，包括单位区间超额回报率、本周以来超额回报率、近一周超额回报率等超额收益率。

This dataset provides excess benchmark returns of funds across different time intervals, including per-interval excess returns, excess returns since the start of the current week, excess returns over the past week, and other excess return metrics.