PT - JOURNAL ARTICLE AU - Grinold, Richard C. TI - The Information Horizon AID - 10.3905/jpm.1997.409632 DP - 1997 Oct 31 TA - The Journal of Portfolio Management PG - 57--67 VI - 24 IP - 1 4099 - http://jpm.pm-research.com/content/24/1/57.short 4100 - http://jpm.pm-research.com/content/24/1/57.full