1) The document discusses the concept of cost of capital, which refers to the minimum rate of return a firm must earn on its investments.
2) Cost of capital includes the cost of debt, preference shares, and equity. It is classified as historical or future, specific or composite, explicit or implicit, and average or marginal.
3) The costs are calculated using different formulas based on whether the securities are perpetual or redeemable, and issued at par, premium or discount.
4) Cost of capital is a key concept in financial management as it is used to evaluate investment projects and make capital structure decisions.