PT - JOURNAL ARTICLE AU - Martin S. Fridson AU - Angelo De Candia TI - Trends AID - 10.3905/jpm.1991.50 DP - 1991 Jan 31 TA - The Journal of Portfolio Management PG - 50--55 VI - 17 IP - 2 4099 - https://pm-research.com/content/17/2/50.short 4100 - https://pm-research.com/content/17/2/50.full