PT - JOURNAL ARTICLE AU - Peter L. Bernstein TI - How stable are successful strategies? AID - 10.3905/jpm.1986.409059 DP - 1986 Apr 30 TA - The Journal of Portfolio Management PG - 1--3 VI - 12 IP - 3 4099 - https://pm-research.com/content/12/3/1.short 4100 - https://pm-research.com/content/12/3/1.full