PT - JOURNAL ARTICLE AU - John D. Martin AU - Arthur Keown TI - A Misleading Feature of Beta for Risk Measurement AID - 10.3905/jpm.1977.408617 DP - 1977 Jul 31 TA - The Journal of Portfolio Management PG - 31--34 VI - 3 IP - 4 4099 - https://pm-research.com/content/3/4/31.short 4100 - https://pm-research.com/content/3/4/31.full