PT - JOURNAL ARTICLE AU - Fischer Black TI - Can portfolio managers outrun the random walkers? AID - 10.3905/jpm.1974.408498 DP - 1974 Oct 31 TA - The Journal of Portfolio Management PG - 32--36 VI - 1 IP - 1 4099 - https://pm-research.com/content/1/1/32.short 4100 - https://pm-research.com/content/1/1/32.full