over the total amount of their investments 修饰的是什么?

问题描述:

over the total amount of their investments 修饰的是什么?
The report reveals that the excess value a company provides its shareholders over the total amount of their investments increases significantly when an ethics code is clearly stated by a company

over the total amount of their investments 是介词短语,在句子中当程度状语,修饰动词provides