PT - JOURNAL ARTICLE AU - Harry M. Markowitz TI - The “two beta” trap AID - 10.3905/jpm.1984.408976 DP - 1984 Oct 31 TA - The Journal of Portfolio Management PG - 12--20 VI - 11 IP - 1 4099 - https://pm-research.com/content/11/1/12.short 4100 - https://pm-research.com/content/11/1/12.full