RT Journal Article SR Electronic T1 The nature and efficiency of the gold market JF The Journal of Portfolio Management FD Institutional Investor Journals SP 18 OP 21 DO 10.3905/jpm.1988.409152 VO 14 IS 3 A1 Raj Aggarwal A1 Luc A. Soenen YR 1988 UL https://pm-research.com/content/14/3/18.abstract AB