Quotes & Sayings About Portfolio Management

In 1989, I was awarded the Von Neumann Prize in Operations Research Theory by the Operations Research Society of America and The Institute of Management Sciences. They cited my works in the areas of portfolio theory, sparse matrix techniques and the SIMSCRIPT programming language. — Harry Markowitz

I think that intelligent forecasting (company revenues, earnings, etc.) should not seek to predict what will in fact happen in the future. Its purpose ought to be to illuminate the road, to point out obstacles and potential pitfalls and so assist management to tailor events and to bend them in a desired direction. Forecasting should be used as a device to put both problems and opportunities into perspective. It is a management tool, but it can never be a substitute for strategy, nor should it ever be used as the primary basis for portfolio investment decisions. — Peter Cundill

Wide diversification is only required when investors do not understand what they are doing. — Warren Buffett

To be sure, the cost of managing capital and of "formal" financial intermediation (that is, the investment advice and portfolio management services provided by a bank or official financial institution or real estate agency or managing partner) is obviously taken into account and deducted from the income on capital in calculating the average rate of return (as presented here). But this is not the case with "informal" financial intermediation: every investor spends time - in some cases a lot of time - managing his own portfolio and affairs and determining which investments are likely to be the most profitable. This effort can in certain cases be compared to genuine entrepreneurial labor or to a form of business activity. — Thomas Piketty