平均上限/下限率
由一连串的上限点（下限点）构成。其特点是，上限点利率是两个或许多利率点的平均值，并非是单一一点的利率。
Average Rate Cap/Floor
Consists of a string of caplets (floorlets). The additional feature is that instead of the rate being based on one single reset rate, the caplet rate is the average of two or more reset rates.