PT - JOURNAL ARTICLE AU - John Michael Murphy TI - Why you can't Win AID - 10.3905/jpm.1978.408633 DP - 1978 Jan 31 TA - The Journal of Portfolio Management PG - 78--82 VI - 4 IP - 2 4099 - https://pm-research.com/content/4/2/78.short 4100 - https://pm-research.com/content/4/2/78.full