Leader: In the book ‘Extreme Ownership: How U.S. Navy SEALs Lead and Win,’ written by Jocko Willink, there is a training story where seven Navy SEAL trainees form a team and carry a rubber boat weighing over 100 kg on their heads. Usually, one team would finish first and another last, but the team members stayed the same, and only the leaders were swapped. As a result, the team that finished last moved to first place, and the team that was first became second. What changed was that only the leaders were replaced; the rest of the team remained the same. It’s important to note that, although a leader’s ability greatly influences success, the key point is that the team that was initially first was moved to second place, not last, even though the leader from the last team took over the first team. This is because, under the previous leader, team members developed a winning habit, which persisted even when the leader changed. The most crucial element in an organization is the leader itself....
James Simons founded Renaissance Technologies, the leading American hedge fund investor. He was, in fact, a mathematician. The Medallion Fund he ran had also seen a 200-fold increase in Berkshire Hathaway stock yield, matching Warren Buffett's performance. It was an incredible record, plain and simple. This conclusion was a subtraction of 5% of the management fee from the fund as a GP with 44% of the compensation fee. He invested in a cutting-edge "quant system" that trades stocks using sophisticated computer-aided algorithms. To eliminate emotional interference, the finance industry excluded employees. However, they recruited doctors like him from the science and technology fields. Even having extensive financial and investment knowledge, investment is the conclusion of action. Sound judgment beyond feelings is crucial for investment, but feelings are a variable. It's challenging to become wealthy if you don't control your emotions. In other words, emotions are a...