HSI did a good show today. Following the rise and fall of Shanghai closely, especially the latter, HSI went into free fall and dropped a staggering 1450 points, which represents a total of 5.84%. It's a figure that we don't see often and I thought it'll be good to save a screenshot of today's market close for future reference. So here we go: What good is the knowledge of such things? I think firstly, it gives you a sense of how bad market can go. If you keep working on CAGR, you'll find that the line is always linearly going upwards. Every year add x% to your previous year, without fail. But we all know that's not going to be true. The market will swing up and swing down violently and often we will be tempted to do things we otherwise might not do. You know, we always wish ......