Journal of Business Finance and Accounting 19(5), pp. 659-674. Dybvig, •., and J.E. Ingersoll, (1982) "Mean-Variance Theory in Complete Markets," Journal of Business 52(2), pp. 233-251. Elton, E.J., M. Gruber and C.R. Blake, (1996) "Survivorship Bias and Mutual Fund Performance," The Review of Financial Studies 9(4),