RT Journal Article SR Electronic T1 Value at Risk Using Principal Components Analysis JF The Journal of Portfolio Management FD Institutional Investor Journals SP 101 OP 112 DO 10.3905/jpm.1997.409633 VO 24 IS 1 A1 Manoj K. Singh YR 1997 UL https://pm-research.com/content/24/1/101.abstract AB