Stock price behavior is often accompanied by substantial controversy, uncertainty, and speculation.

Please select one of the following NBC News videos:

• Oprah Sends Weight Watchers Stock Soaring.
• Wall Street Goes Wild for Twitter.

For this week's discussion, please respond to the video you've selected as follows:

• How did the stock price immediately respond following these events? How has the stock price changed in subsequent years? What is it trading for today?
• How might the present value free cash-flow method have been used to assess the fairness of the stock price?
• What are the challenges of using the present value free cash-flow method in practice? How can accountants overcome these challenges?