PT - JOURNAL ARTICLE AU - Peter L. Bernstein TI - The surprises of risk AID - 10.3905/jpm.1984.408970 DP - 1984 Jul 31 TA - The Journal of Portfolio Management PG - 4 VI - 10 IP - 4 4099 - https://pm-research.com/content/10/4/4.short 4100 - https://pm-research.com/content/10/4/4.full