As the group CFO of Air Canada, you will always be challenged and asked by investors regarding the company's financial risk management. Regarding the current Q2 financial report and Air Canada starting to invest in new air-crafts, please write a professional memo to investors to address the risks concerns and how Air Canada manages the risks. (1500 words limit)

1. How does Air Canada manage its risks from a financial perspective;

2. What are possible methods Air Canada use to measure the investment projects;

3. What is else as CFO concerned about the company's operation and profits?

4. Others.