In chapter 8, we learned how to evaluate a stock. The models give us the theoretically reasonable estimations based on the fundamentals ofthe companies. However, it is interesting to see when the stock market is acting at a different way. Starting from the beginning of 2021, what we call "meme" stocks, such as GameStop (GME) and AMC Entertainment (AMC), have drew attention in the market. To become meme stocks, they have some things in common: 1. Low stock price and small size of shares outstanding so that market manipulation makes easier 2. Background story so that attracting the advocates through the social medias makes easier 3. Large position of short selling in the current market so that executing the "short squeeze" trading strategy makes easier 4. Active derivatives transactions to accelerate the \"short squeeze" strategy Obviously, the \"temporally" stock surge can push the stock price to largely deviate from the theoretical price. However, not everyone can successfully harvest from the event. Would you think the phenomenon is an example of human irrationality? Were you a part of any of the events and what did you experience? Will you still take the risk after learning the fundamental of stock pricing? I've attached several articles for your reference. Please feel free to share your thoughts and be open-minded