The most important rule in investing is not to lose your initial capital. Making money comes later. If you lose 50% of your principal, the loss rate is 50%, but to recover that principal, you need a 100% return. This is because the baseline of your return—the principal—has already been halved. Many people tend to think that if they’ve lost 50%, they only need a 50% return to break even. However, this is a misunderstanding of the starting point. In investing, the baseline is always the original principal. The principal after a loss is no longer the same; it’s already in the past. - Joseph’s “just my thoughts”
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...