Today I talked about probabilistic thinking in investing. When the market sentiment is high, you should sell a bit; conversely, you should buy a bit. I noticed some friends replied below saying they sold at the market open today and will buy back after it drops. Actually, this approach is wrong. It’s not wrong that you sold, nor is it wrong to buy back after it drops; the mistake lies in hoping it will drop after you sell. Many of us have the obsession of predicting price increases and decreases in investing, as if selling means you predict it will drop, or conversely, you sold because you predicted it would drop. However, this is not the correct mindset. The correct approach is not to predict increases or decreases, but to decide to sell just because of the current price, that’s all. As for whether it goes up or down after you sell, not only can you not predict that, but I also advise you to give up on such predictions. We all know that the biggest enemies of investors are fear and greed, and the reason for fear and greed is due to your predictions of future increases and decreases—selling because you are afraid it will go up and buying because you are afraid it will go down. This connects your current buying and selling behavior with the future price, thereby generating fear. However, if you continue to observe after you sell, and if it goes up, sell again until you are fully out; if you buy and it goes down, buy again until you are fully in—only responding rather than predicting, this way your fear and greed will be significantly reduced.