PT - JOURNAL ARTICLE AU - Marvin McClay TI - The Penalties of Incurring Unsystematic Risk AID - 10.3905/jpm.1978.408645 DP - 1978 Apr 30 TA - The Journal of Portfolio Management PG - 31--35 VI - 4 IP - 3 4099 - https://pm-research.com/content/4/3/31.short 4100 - https://pm-research.com/content/4/3/31.full