%0 Journal Article %A Don M. Chance %A Stephen P. Ferris %T The CBOE call option index %B a historical record %D 1985 %R 10.3905/jpm.1985.409035 %J The Journal of Portfolio Management %P 75-83 %V 12 %N 1 %U https://jpm.pm-research.com/content/iijpormgmt/12/1/75.full.pdf