PT - JOURNAL ARTICLE AU - Jeffrey A. Frankel TI - Portfolio shares as ‘Beta Breakers’ AID - 10.3905/jpm.1985.409020 DP - 1985 Jul 31 TA - The Journal of Portfolio Management PG - 18--23 VI - 11 IP - 4 4099 - https://pm-research.com/content/11/4/18.short 4100 - https://pm-research.com/content/11/4/18.full