%0 Journal Article %A Peter H. Ritchken %T Enhancing mean-variance analysis with options %D 1985 %R 10.3905/jpm.1985.409003 %J The Journal of Portfolio Management %P 67-71 %V 11 %N 3 %U https://jpm.pm-research.com/content/iijpormgmt/11/3/67.full.pdf