So, it's not surprising that asset allocation explains more than 100% of returns and that, for the community as a whole, market timing and security selection are costly and lower the community's aggregate investment returns.

因此资产配置能解释100%以上的回报,也不足为奇了,对投资者整体来说,市场时机选择,和证券选择是有代价的,降低了总的投资回报

耶鲁公开课 - 金融市场课程节选

A lot of people in the financial community are annoyed by them because these regulations are costly to comply with and they take a lot of resources.

很多金融界人士对其烦不胜烦,因为执行规范条例的成本很高,一旦执行,占用太多资源

耶鲁公开课 - 金融市场课程节选