%0 Journal Article %A Richard C. Grinold %T Are Benchmark Portfolios Efficient? %D 1992 %R 10.3905/jpm.1992.34 %J The Journal of Portfolio Management %P 34-40 %V 19 %N 1 %U https://jpm.pm-research.com/content/iijpormgmt/19/1/34.full.pdf