%0 Journal Article %A Galen Burghardt %A Morton Lane %T How to tell if options are cheap %D 1990 %R 10.3905/jpm.1990.409259 %J The Journal of Portfolio Management %P 72-78 %V 16 %N 2 %U https://jpm.pm-research.com/content/iijpormgmt/16/2/72.full.pdf