Revision as of 07:39, 25 August 2020 by Dirkjan(talk | contribs)(Created page with "The variance of returns on a portfolio with proportions <math>x_i</math> invested in stock <math>i</math> is: <math>\sum_{i=1}^{N} \sum_{j=1}^{N} {x_i}{x_j} \sigma_{ij}</math...")
