%0 Journal Article %A Wilson Sy %T Market timing %B Is it a folly? %D 1990 %R 10.3905/jpm.1990.409281 %J The Journal of Portfolio Management %P 11-16 %V 16 %N 4 %U https://jpm.pm-research.com/content/iijpormgmt/16/4/11.full.pdf