RT Journal Article SR Electronic T1 A Case of a Straight-Line Minimum-Variance Set in the Absence of Perfect Correlation JF The Journal of Investing FD Institutional Investor Journals SP 54 OP 56 DO 10.3905/joi.3.2.54 VO 3 IS 2 A1 Majed R. Muhtaseb YR 1994 UL https://pm-research.com/content/3/2/54.abstract AB