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Portfolio Weights

The fraction of the total investment in a portfolio held in each individual investment in the portfolio.

Return of a Portfolio

The weighted average of the returns on the investments in a portfolio, where the weights correspond to the portfolio weights.

Expected Return of a Portfolio

The weighted average of the expected returns of the investments in a portfolio, where the weights correspond to the portfolio weights.

Volatility of a portfolio

The total risk, measured as standard deviation, of a portfolio.

correlation

the extent to which variables are related

Equally Weighted Portfolio

A portfolio in which the same amount of money is invested in each stock.

Market Portfolio

The portfolio of all risky investments, held in proportion to their value.

market capitalization

number of shares issued by listed corporations multiplied by current share prices

Value-Weighted Portfolio

A Portfolio in which each security is held in proportion to its market capitalization.