PT - JOURNAL ARTICLE AU - Robert D. Arnott TI - What Hath MPT Wrought AID - 10.3905/jpm.1983.5 DP - 1983 Oct 31 TA - The Journal of Portfolio Management PG - 5--11 VI - 10 IP - 1 4099 - https://pm-research.com/content/10/1/5.short 4100 - https://pm-research.com/content/10/1/5.full