1. The document discusses various approaches to valuing common stock, including the discounted dividend model, corporate valuation model, and using price-to-earnings multiples. 2. The discounted dividend model values a stock based on the present value of its expected future dividend payments, while the corporate valuation model values the entire firm based on the present value of its expected future free cash flows. 3. Other approaches discussed include using comparable price-to-earnings or price-to-cash flow multiples from similar companies in the same industry to estimate the value of a stock.