Often people ask for annualized returns over the entire investment horizon of index or fund. This is wrong simply each human investment lifespan is limited to their relevant period and changes as we age. How the world managed financially 100 years ago, 50 years ago, 30 years ago and today can be very different too. Depending when we are investing actively determines our performance during this periods. For myself, the active investment period is about few years before the global financial crisis till ongoing now. That's 10-12 years mark. Therefore, it is meaningless to me when fund promote their result across 20 years or 30 years horizon where tons of things can happen in-between.. 10 years before it may be mega bull or era where they face different government regulatory, technological or whatsoever industry in focus. If i have started the same, my annualized can also be different from today ......