In the financial markets, however, the connection between a marketable security and the underlying business is not as clear-cut. For investors in a marketable security the gain or loss associated with the various outcomes is not totally inherent in the underlying business; it also depends on the price paid, which is established by the marketplace. The view that risk is dependent on both the nature of investments and on their market price is very different from that described by beta.
Seth KlarmanOne of the biggest challenges in investing is that the opportunity set available today is not the complete opportunity set that should be considered. Limiting your opportunity set to the one immediately at hand would be like limiting your spouse to the students you met in high school
Seth KlarmanPressure to produce over the short term - a gun to the head of everyone - encourages excessive risk taking which manifests itself in several ways - fully invested posture at all times, the use of leverage, and a market centric orientation that makes it difficult to stand apart from the crowd and take a long term perspective.
Seth KlarmanOne must understand the importance of an endless drive to get information and seek value.
Seth Klarman