By the late 1980's, the field of portfolio theory was undergoing enormous ferment.

They also showed that generally the demand for money can not be derived from portfolio theory.

An example of a strategy that is based on risk is portfolio theory.

"Terada was the first person to introduce modern portfolio theory into Japan."

In the 1970s much of strategic management dealt with size, growth, and portfolio theory.

In advanced portfolio theory, different kinds of risk are taken into consideration.

A fundamental idea in finance is the relationship between risk and return (see modern portfolio theory).

The idea of portfolio management comes from the portfolio theory.

The branch managers might not understand portfolio theory, but they knew their borrowers.

More recently, modern portfolio theory has been used to model the self-concept in social psychology.