In today's financial environment, marked by rising geopolitical tensions and fluctuating crude oil prices, investors face significant challenges. Veteran market strategist Bob Farrell's ten timeless investing rules offer a framework for navigating this complexity. His first rule, that markets always revert to the mean, serves as a reminder that sharp rallies, particularly in sectors like artificial intelligence and defense, are often temporary. Furthermore, Farrell emphasizes that market behavior resembles a pendulum, swinging between extremes of euphoria and fear, which can create investment opportunities. He warns against the notion of 'new eras,' asserting that speculative excesses, such as the current enthusiasm for AI, will eventually correct. The rules also highlight the importance of risk management during sharp market corrections and the tendency of retail investors to buy at peaks and sell during downturns. Ultimately, Farrell's principles stress the need for discipline, a focus on long-term fundamentals, and the understanding that while markets evolve, human behavior remains constant.