When companies report financial results, they use a calendar year or decide their own "fiscal year." Apple, for example, uses a fiscal year starting in September and ending in September next year since they usually release new iPhones or have Apple meetings in September. It is essential to make sure the data matches in valuation for consistency. To see how significant the differences can be, I will use part of my Oracle valuation to illustrate. When valuing Oracle stock, I found that the company will have high growth whenever it has significant acquisitions and flat operating income when it does not. My judegemg is that this company growing mainly with M&A no matter how they advertise their technology. So you cannot do Oracle valuation without valuing each acquisition and calculating the return on capital. Figure 1 and 2 below shows Oracle's M&A cost and my adjusted annual operating income. But as you can see, the M&A cost does not match the active gro...