Can someone please assist me?

The essence of chapter 7 and establishing the value of a stock is that company has the ability to generate free cash flow, or it has the potential to generate free cash flow in the future. With that assumption, the level of free cash and the speed of the growth of the free cash flow is the primary driver of the company's stock valuation. The question at hand is if you believe this evaluation method explains the rise and the fall of a stock price? Can you give examples? What about those companies that see their stock prices go higher despite lack of free cash flow or regardless of their free cash flow assumptions? What explains their rise in price?