The returns would be attributable solely to my ability to market time the bond futures market.

回报率仅仅取决于,我选择买卖期货的市场时机的能力

耶鲁公开课 - 金融市场课程节选

He's come to the conclusion that over 90% of the variability of returns in institutional portfolios is attributable to asset allocation and that's the number that I think most people hear cited when they are looking at Roger Ibbotson's work.

他得出结论,机构投资中,超过90%的回报率变动,要归因于资产配置,我想这是罗格·伊博森的文章里面,被人引用得最多的结论

耶鲁公开课 - 金融市场课程节选