Calculate the rate of return that investors expect to earn from the Boeing's common stock. Use the Capital Asset Pricing Model (CAPM). Obtain the stock beta from Yahoo Finance, and the risk-free rate from the US Treasury website, and use it in the CAPM.You will need the market value of the common stock outstanding in finding WACC.

Use the data you have compiled to calculate the Boeing's cost of capital = WACC. WACC requires (the market value of the firm's debt , the firm's after-tax cost of debt, the firm's cost of equity & the market value of its common equity)