Epstein Secrets

tive risk and was first mentioned by Treynor and Black (1973) as the appraisal ratio and later by Grinol

are the best out performers during a bear market period can be explained by taking into account some behavioural aspects of investing. Kahneman and Tversky (1979, 1992) for example state that people prefer avoiding losses to making gains of the same amount. This implies that economic agents prefer stock

error attacks by a new group within Fatah, called Black September. There was at least some potentially en

was also Israeli. They were investigating the effect of human bias and other subjective factors on how we perceive reality, and thus make decisions. Tversky’s work especially fascinated me, because it questioned a basic assumption in the kind of predictive formulas my own department was advancing: that we

error attacks by a new group within Fatah, called Black September. There was at least some potentially en

was also Israeli. They were investigating the effect of human bias and other subjective factors on how we perceive reality, and thus make decisions. Tversky's work especially fascinated me, because it questioned a basic assumption in the kind of predictive formulas my own department was advancing: that we

rino University Professor and co- founder of the Black Hole Initiative at Harvard University, and the au

sychologists Daniel Kahneman and Amos Tversky—has documented the ways in which people deviate from the prescriptions of rational models. Kahneman and Tversky proposed that in many situations people instead follow simple heuristics that allow them to reach good solutions at low cognitive cost but sometimes

rino University Professor and co- founder of the Black Hole Initiative at Harvard University, and the au

sychologists Daniel Kahneman and Amos Tversky—has documented the ways in which people deviate from the prescriptions of rational models. Kahneman and Tversky proposed that in many situations people instead follow simple heuristics that allow them to reach good solutions at low cognitive cost but sometimes