PT - JOURNAL ARTICLE AU - Scott D Opsal TI - Timee diversification AID - 10.3905/jpm.1986.409075 DP - 1986 Jul 31 TA - The Journal of Portfolio Management PG - 74--75 VI - 12 IP - 4 4099 - https://pm-research.com/content/12/4/74.short 4100 - https://pm-research.com/content/12/4/74.full