Steven Nickolas is a writer and has 10+ years of experience working as a consultant to retail and institutional investors. Portfolio variance is a measure of the dispersion of returns of a portfolio.

The Journal of Finance, Vol. 41, No. 5 (Dec., 1986), pp. 1051-1068 (18 pages) Duality theory is employed to provide necessary and sufficient conditions for portfolios on the minimum-variance frontier ...

How right Portfolio Management helps us to achieve better returns. Stock selection is not the most important thing in investing: avoid trying to find the next Apple. The stock market is not a "become ...

Investopedia contributors come from a range of backgrounds, and over 25 years there have been thousands of expert writers and editors who have contributed. Somer G. Anderson is CPA, doctor of ...