People are really crazy about minor decrements down. Huge insanities can come from just subconsciously over-weighing the importance of what you’re losing or almost getting and not getting…
— Charlie Munger
One of prospect theory’s most important contributions to finance is loss aversion, the idea that for most people, losses loom larger than corresponding gains. The empirical evidence suggests we feel losses about two to two-and-a-half times more than we feel gains. Loss aversion is a clear-cut deviation from expected utility theory.”
— Michael Mauboussin