Two powerful emotions dominate trading decisions: fear and greed. Left unchecked, they can distort rational thinking and sabotage even the best strategies. Ancient Stoic philosophers offer practical lessons for moderating these forces, reminding traders that emotional mastery is as important as technical skill.Marcus Aurelius advised, “Be content with what you are and wish not change, nor dread your last day nor long for it.” Epictetus similarly taught, “The only thing that is required is that we be content with what we have, when we have it.” These reflections encourage equanimity amid the turbulence of markets, pushing us to respond with clarity rather than panic or craving.