Always remembering that we might be wrong, we must contemplate alternatives, concoct hedges, and search vigilantly for validation of our assessments. We always sell when a security's price begins to reflect full value, because we are never sure that our thesis will be precisely correct.
Seth KlarmanFrequent comparative ranking can only reinforce a short-term investment perspective. It is understandably difficult to maintain a long-term view when, faced with the penalties for poor short-term performance, the long-term view may well be from the unemployment line ... Relative-performance-oriented investors really act as speculators. Rather than making sensible judgments about the attractiveness of specific stocks and bonds, they try to guess what others are going to do and then do it first.
Seth Klarman